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  Subjects -> AGRICULTURE (Total: 946 journals)
    - AGRICULTURAL ECONOMICS (85 journals)
    - AGRICULTURE (670 journals)
    - CROP PRODUCTION AND SOIL (108 journals)
    - DAIRYING AND DAIRY PRODUCTS (31 journals)
    - POULTRY AND LIVESTOCK (52 journals)

POULTRY AND LIVESTOCK (52 journals)

Showing 1 - 52 of 52 Journals sorted alphabetically
Acta Agriculturae Scandinavica, Section A - Animal Sciences     Hybrid Journal   (Followers: 8)
Acta Scientiarum. Animal Sciences     Open Access   (Followers: 4)
Advances in Animal Biosciences     Full-text available via subscription   (Followers: 10)
African Journal of Livestock Extension     Full-text available via subscription   (Followers: 2)
Alces : A Journal Devoted to the Biology and Management of Moose     Open Access  
Animal Biotechnology     Hybrid Journal   (Followers: 8)
Animal Cells and Systems     Hybrid Journal   (Followers: 4)
Animal Frontiers     Hybrid Journal   (Followers: 1)
Animal Nutrition     Open Access   (Followers: 19)
Animal Production     Open Access   (Followers: 3)
Animal Production Science     Hybrid Journal   (Followers: 1)
Animal Reproduction Science     Hybrid Journal   (Followers: 6)
Animal Research International     Full-text available via subscription   (Followers: 6)
Animal Science Journal     Hybrid Journal   (Followers: 6)
Archives Animal Breeding     Open Access   (Followers: 4)
Archives of Animal Nutrition     Hybrid Journal   (Followers: 7)
Asian-Australasian Journal of Animal Sciences     Open Access  
Bangladesh Journal of Animal Science     Open Access   (Followers: 2)
Boletim de Indústria Animal     Open Access  
Bulletin of Animal Health and Production in Africa     Full-text available via subscription   (Followers: 2)
Canadian Journal of Animal Science     Hybrid Journal   (Followers: 6)
Hayvansal Üretim     Open Access  
Indian Journal of Animal Sciences     Open Access   (Followers: 6)
Indonesian Journal of Animal and Veterinary Sciences     Open Access  
International Journal of Health, Animal Science and Food Safety     Open Access   (Followers: 3)
International Journal of Livestock Production     Open Access   (Followers: 2)
Journal of Animal Breeding and Genetics     Hybrid Journal   (Followers: 5)
Journal of Animal Science     Hybrid Journal   (Followers: 14)
Journal of Animal Science and Biotechnology     Open Access   (Followers: 4)
Journal of Animal Science and Technology     Open Access   (Followers: 2)
Journal of Applied Animal Nutrition     Hybrid Journal   (Followers: 3)
Journal of Applied Animal Welfare Science     Hybrid Journal   (Followers: 14)
Journal of Applied Poultry Research     Hybrid Journal   (Followers: 5)
Journal of World's Poultry Research     Open Access   (Followers: 3)
Jurnal Agripet     Open Access   (Followers: 1)
Jurnal Ilmu Produksi dan Teknologi Hasil Peternakan     Open Access  
La Chèvre     Full-text available via subscription  
Nigerian Journal of Animal Science     Full-text available via subscription   (Followers: 1)
Nutrición Animal Tropical     Open Access   (Followers: 2)
Online Journal of Animal and Feed Research     Open Access   (Followers: 3)
Open Journal of Animal Sciences     Open Access   (Followers: 4)
Porcine Health Management     Open Access  
Poultry Science     Hybrid Journal   (Followers: 3)
Poultry Science Journal     Open Access   (Followers: 2)
Research in Agriculture, Livestock and Fisheries     Open Access  
Revista Brasileira de Saúde e Produção Animal     Open Access  
Revista de Producción Animal     Open Access  
Revista Mexicana de Ciencias Pecuarias     Open Access   (Followers: 1)
The Professional Animal Scientist     Hybrid Journal  
Tropical Animal Health and Production     Hybrid Journal   (Followers: 1)
Veeplaas     Full-text available via subscription  
World Rabbit Science     Open Access  
Journal Cover
Canadian Journal of Animal Science
Journal Prestige (SJR): 0.403
Citation Impact (citeScore): 1
Number of Followers: 6  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 0008-3984 - ISSN (Online) 1918-1825
Published by NRC Research Press Homepage  [21 journals]
  • Note of appreciation / Note de reconnaissance
    • Abstract: Canadian Journal of Animal Science, e-First Articles.

      Citation: Canadian Journal of Animal Science
      PubDate: 2018-02-14T01:38:28Z
      DOI: 10.1139/cjas-2018-0007
       
  • Transcriptional regulation of milk lipid synthesis by exogenous C16:0 and
           C18 fatty acids in bovine mammary epithelial cells
    • Authors: Ni Dan, Hang Zhang, Changjin Ao, Khas-Erdene
      Pages: 260 - 270
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      The objective of this study was to examine the effects of removing one fatty acid from a combination of long-chain fatty acids (LCFA) on milk lipogenesis in bovine mammary epithelial cells. The incubation concentration of LCFA was determined, and 100 μmol L−1 of C16:0, 5 μmol L−1 of C18:0, 100 μmol L−1 of cis-9 C18:1, 25 μmol L−1 of n-6 C18:2, and 1.2 μmol L−1 of n-3 C18:3 were used in the study. Treatments were C16:0, C18:0, C18:1, C18:2, and C18:3 combinations as control; control absent of C16:0 as A-C16:0; control absent of C18:0 as A-C18:0; control absent of C18:1 as A-C18:1; control absent of C18:2 as A-C18:2; control absent of C18:3 as A-C18:3. Results showed that compared with control, fatty acid synthetase expression was reduced by A-C18:0 and A-C18:1. Palmitic acid decreased expression of lipoprotein lipase. Compared with control, the expression of stearoyl-coenzyme A desaturase-1 and cluster of differentiation 36 was reduced by all treatments. Peroxisome proliferator-activated receptor-α expression was down-regulated by A-C16:0, A-C18:0, A-C18:1, and A-C18:2. Sterol regulatory element binding factor-1 was decreased when treated with A-C18:0, A-C18:1, and A-C18:2. Cells lack of 18-carbon fatty acid synthesized lower amount of intracellular triglyceride compared with control.
      Citation: Canadian Journal of Animal Science
      PubDate: 2018-03-19T07:00:00Z
      DOI: 10.1139/cjas-2016-0188
       
  • Production of Jiggs bermudagrass and the impact of quality milk production
           and quality of Holstein dairy cows under an intermittent grazing system
    • Authors: E.V. Brandstetter, K.A.P. Costa, M.A.P. da Silva, F.R. Araújo Neto, V.R. da Silva, R.B.S. Neves, W.F. de Souza, I.P. de Oliveira
      Pages: 279 - 288
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      Dairy production plays a fundamental role in the Brazilian economy and high-quality forage is necessary for ruminants to produce satisfactory milk levels. The aim of the present study was to evaluate the production and quality of Jiggs bermudagrass and its effects on the production and quality parameters of milk from Holstein cows under an intermittent grazing system throughout the year. The experiment was conducted in a randomized design with the four seasons as treatments, replicated five times. The season had a significant effect on the production and nutritional parameters of Jiggs bermudagrass with the highest total dry matter production observed during summer, followed by spring and fall. The neutral detergent fiber and acid detergent fiber contents were significantly higher in winter. The in vitro dry matter digestibility was significantly higher in summer, spring, and fall. Jiggs bermudagrass is a promising forage for the enhancement of milk production under intermittent stocking. However, its effects vary seasonally which exerts a greater influence during the winter, even with irrigation, because it directly affects the milk production and quality. The correlation results demonstrated the importance of better quality forage for increasing milk production without compromising the levels of milk solids.
      Citation: Canadian Journal of Animal Science
      PubDate: 2018-01-31T08:00:00Z
      DOI: 10.1139/cjas-2016-0136
       
  • Effects of fenugreek (Trigonella foenum-graecum L.) seed extract
           supplementation in different energy density diets on growth performance,
           nutrient digestibility, blood characteristics, fecal microbiota, and fecal
           gas emission in growing pigs
    • Authors: M.M. Hossain, M. Begum, I.H. Kim
      Pages: 289 - 298
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      This study evaluated the efficacy of fenugreek seed extract (FSE) in growing pigs. About 140 growing pigs [(Yorkshire × Landrace) × Duroc] with an average body weight (BW) of 23.70 ± 2.80 kg were used in a 6 wk trial. Treatments were (on as-fed basis) two levels of FSE (FSE0, 0 or FSE0.2, 2 g kg−1 basal diet), and two levels of energy [low-energy diet (LED); 3160 or high-energy diet (HED); 3260 kcal kg−1 metabolizable energy (ME)]. Pigs in HED and FSE0.2 diets had higher final BW, average daily gain, and gain:feed ratio (G:F) compared with in LED, and FSE0 diets, respectively (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2018-01-31T08:00:00Z
      DOI: 10.1139/cjas-2016-0076
       
  • Effect of variety and stage of maturity at harvest on nutrient and neutral
           detergent fiber digestibility of forage barley grown in western Canada
    • Authors: Jayakrishnan Nair, Aaron D. Beattie, David Christensen, Peiqiang Yu, Tim McAllister, Daalkhaijav Damiran, John J. McKinnon
      Pages: 299 - 310
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      This study evaluated the effect of variety (V; CDC Cowboy, CDC Copeland, and Xena) and stage of harvest maturity (M; milk, early-, mid-, and hard-dough) on nutrient and neutral detergent fiber digestibility (NDFD) characteristics of barley forage using a randomized complete block design with 3 × 4 factorial treatment arrangement. Barley varieties had similar crude protein, but CDC Cowboy had greater (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2018-02-03T08:00:00Z
      DOI: 10.1139/cjas-2017-0060
       
  • Using different levels of glycerine, glucose, or sucrose in broiler
           starter diets to overcome negative effects of delayed feed access on
           growth performance
    • Authors: Anhao Wang, Derek Anderson, Bruce Rathgeber
      Pages: 311 - 324
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      Two trials were conducted to evaluate the inclusion of glycerine, glucose, or sucrose in broiler starter diets to overcome negative effects of delayed feed access. In trial 1, 2160 newly hatched chicks (mixed sexed) were randomly assigned to two feeding programs (immediate vs. 36 h delayed feed access). Nine starter diets prepared with crude glycerine, glucose, or sucrose fed at 0%, 4%, or 8% levels were fed during the first 14 d post hatch (PH). In trial 2, 720 male and 720 female newly hatched chicks were randomly assigned to two feeding programs (immediate vs. 48 h delayed feed access). Starter diets fed during the first 14 d of feed access, consisted of a control, 8% glycerine, or 8% glucose. In both trials, a common grower and finisher diet were fed during days 14–24 and 25–35, respectively. Body weight and feed consumed were measured on 7, 14, 24, and 35 d. In trial 1, all 8% diet-fed birds were heavier compared with the control on day 35 PH (2259 vs. 2198 g, P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2018-01-31T08:00:00Z
      DOI: 10.1139/cjas-2017-0039
       
  • Effect of dietary fermented corn in different energy dense diets on growth
           performance, nutrient digestibility, ileal microorganisms, and fecal
           noxious gas emission of growing pigs
    • Authors: J.W. Park, I.H. Kim
      Pages: 325 - 332
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      This study evaluated the efficacy of fermented corn (FC) in growing pigs. One hundred twenty-eight growing pigs [(Landrace × Yorkshire) × Duroc)] with an initial body weight of 29.59 ± 1.34 kg were used in a 6 wk experiment. Pigs were assigned into one of four dietary treatments in a 2 × 2 factorial arrangement with two levels of nutrient density (high energy: 3.37 Mcal kg−1, or low energy: 3.29 Mcal kg−1) and FC (0% or 20% substitute for corn). Pigs fed diets with FC increased (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2018-02-03T08:00:00Z
      DOI: 10.1139/cjas-2016-0075
       
  • Growth performance and expression of genes encoding enzymes involved in
           methionine and cysteine metabolism in piglets fed increasing sulphur amino
           acid to lysine ratio during enterotoxigenic Escherichia coli challenge
    • Authors: Roseline K. Kahindi, Alemu Regassa, John K. Htoo, Charles Martin Nyachoti
      Pages: 333 - 340
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      A study was conducted to examine the effect of standardised ileal digestible (SID) sulphur amino acids/lysine ratio (SAA/Lys) on performance and expression of methionine adenosyltransferase 1 and 2 alpha (MAT1α and MAT2α), and cystathionine gamma-lyase (CTH) in piglets challenged with an enterotoxigenic Escherichia coli (ETEC). Thirty five [Duroc × (Yorkshire × Landrace)] piglets (6.9 ± 0.5 kg) were randomly assigned to five dietary treatments. The diets were antibiotic free with SID SAA/Lys of 48%, 54%, 60%, 66%, and 72%. Pigs were orally challenged with 6 and 15 mL of ciprofloxacin-resistant ETEC K88+ on days 7 and 10. Blood samples were collected before (BC) and 6, 24, and 48 h after challenge (AC). Body weight gain and feed intake were collected on days 0, 6, and 12 to determine average daily gain (ADG). Gain to feed ratio (G/F) was calculated by dividing ADG by average daily feed intake (ADFI). On day 13, all pigs were euthanized to collect liver and ileal samples to analyse gene expression using real-time polymerase chain reaction. Pigs fed the diet containing SAA/Lys of 66% had the highest ADG, ADFI, and G/F BC. However, ADG, ADFI, and G/F were similar across all ratios AC. Serum tumor necrosis factor alpha concentration at 6 h AC was higher (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2018-01-31T08:00:00Z
      DOI: 10.1139/cjas-2017-0027
       
  • Association of MSTN gene polymorphism (C354T) with performance traits in
           raccoon dogs
    • Authors: Sylwia Nisztuk, Brygida Ślaska, Grzegorz Zięba, Iwona Rozempolska-Rucińska
      Pages: 341 - 346
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      The aim of the study was to identify polymorphisms within nuclear DNA genes and determine their association with the performance traits of farmed raccoon dogs. The study involved 354 animals and their breeding documentation data. Myostatin (MSTN), insulin-like growth factor 1 (IGF1), and growth hormone (GHR) genes were amplified, sequenced, and subjected to bioinformatics and statistical analysis. Estimation of variance components was performed with the residual maximum likelihood (REML) method, and best linear unbiased prediction (BLUP) of the breeding values was carried out. The predictors of the traits of direct additive, maternal additive, and random-specific maternal environmental effects were analysed. Within the nucleotide sequences of the analysed genes, one silent single nucleotide polymorphism (SNP) was identified in exon 1 of the MSTN gene. The analysis of the variance of the fixed-specific maternal environmental effect revealed statistically significant differences in the body weight among raccoon dogs with alternative polymorphisms. The mean effects of the estimators of polymorphism addition and dominance measured by MSTN gene regression had mostly a significant impact on the level of the traits estimated in animals. There was statistically significant association of the polymorphism in the MSTN gene with the body weight in raccoon dogs, which validates selection thereof as a candidate gene for this economically most important performance trait of raccoon dogs.
      Citation: Canadian Journal of Animal Science
      PubDate: 2018-02-03T08:00:00Z
      DOI: 10.1139/cjas-2017-0070
       
  • Impact of rare earth element-enriched yeast on growth performance,
           nutrient digestibility, blood profile, and fecal microflora in finishing
           pigs
    • Authors: L. Cai, C.M. Nyachoti, I.H. Kim
      Pages: 347 - 353
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      This study was conducted to evaluate effects of rare earth element-enriched yeast (RY) on growth performance, nutrient digestibility, blood profile, and fecal microbial flora in finishing pigs. A total of 100 finishing pigs [(Landrace × Yorkshire) × Duroc] were used in a two-phase feeding trial. Pigs were randomly assigned to five treatments according to their initial body weight (five pens per treatment, two gilts and two barrows per pen). Treatments were basal diets, free of antibiotics [negative control (NC)]; NC + 500, 1000, and 1500 mg kg−1, respectively, of RY; antibiotics diets, NC + 500 mg kg−1 of tiamulin [positive control (PC)]. Overall, average daily gain (ADG) and gain to feed ratio (G:F) increased linearly with increasing level of RY in diets. At the end of the experiment, blood lymphocyte concentration and apparent total tract digestibility of dry matter and gross energy increased linearly in pigs fed the increasing level of RY in diets. The better ADG, G:F, and fecal Lactobacillus counts were observed in both RY and PC groups compared with the NC group. In conclusion, diets with RY improved growth performance, digestibility, blood lymphocyte counts, and fecal Lactobacillus counts in finishing pigs, and RY may be considered as an alternative to antibiotics.
      Citation: Canadian Journal of Animal Science
      PubDate: 2018-02-03T08:00:00Z
      DOI: 10.1139/cjas-2017-0089
       
  • Conventional solid fermentation alters mycotoxin contents and microbial
           diversity analyzed by high-throughput sequencing of a Fusarium
           mycotoxin-contaminated diet
    • Authors: L.J. Yang, Z.B. Yang, W.R. Yang, H.R. Li, C.Y. Zhang, S.Z. Jiang, X.M. Li
      Pages: 354 - 361
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      Fusarium mycotoxins, commonly present in corn and its derived products for animals, has caused significant economic impact on swine reproduction in the People’s Republic of China. The objective of the present study, therefore, was to evaluate changes in mycotoxin contents and microbial diversity by conventional solid fermentation of a contaminated diet. Three diets were evaluated, as follows: control group, basal diet; test group 1 (25 Toxin), basal diet in which corn and corn gluten meal were replaced with 25% mycotoxin-contaminated corn and corn gluten meal, respectively; test group 2 (50 Toxin), basal diet in which corn and corn gluten meal were replaced with 50% mycotoxin-contaminated corn and corn gluten meal, respectively. Compound strains were used for solid-state fermentation of the compound feed. Under the present experimental conditions, conventional solid fermentation altered microbial diversity, as demonstrated by high-throughput sequencing of a Fusarium mycotoxin-contaminated diet, and the content of zearalenone (ZEA) was reduced significantly. However, deleterious effects were also observed with regard to the contents of deoxynivalenol (DON) and fumonisin B1 (FUMB1). These results may have implications for animals consuming Fusarium mycotoxin-contaminated food or feed by conventional solid fermentation.
      Citation: Canadian Journal of Animal Science
      PubDate: 2018-02-10T08:00:00Z
      DOI: 10.1139/cjas-2017-0093
       
  • Profitability measures as decision-making tools for Québec dairy
           herds
    • Authors: H.A. Delgado, R.I. Cue, D. Haine, A. Sewalem, R. Lacroix, D. Lefebvre, J. Dubuc, E. Bouchard, K.M. Wade
      Pages: 18 - 31
      Abstract: Canadian Journal of Animal Science, Volume 98, Issue 1, Page 18-31, March 2018.
      A retrospective cohort study was conducted using production and health records from Québec dairy herds which were integrated with the objectives of calculating different lifetime profitability measures and developing analyses of the impact of selected reproduction and health variables on profitability. The dataset for the study consisted of lifetime records for a total of 13 668 Holstein cows from 113 herds and in cohorts of cows calving for the first time between 2000 and 2009. To calculate profit, all the revenues and costs were accumulated on a lifetime basis, and cumulative lifetime profit and cumulative lifetime profit adjusted for the opportunity cost of postponed replacement were selected for analysis. There were statistically significant effects in both profit measures because of age at first calving, cumulative number of days in milk, and cumulative number of days dry as well as the number of health events accumulated by animal lifetime (clinical mastitis, reproductive problems, and feet and legs problems). The results of lifetime profit measures and management variables with an effect on profit results could help dairy producers in the process of monitoring and making decisions regarding profit goals and herd life of their cows.
      Citation: Canadian Journal of Animal Science
      PubDate: 2017-06-15T07:00:00Z
      DOI: 10.1139/cjas-2016-0202
       
  • Dynamics of acute phase proteins in dairy cows with subclinical
           hypocalcemia
    • Authors: J.O. Feijó, R.A. Pereira, P. Montagner, F.A.B. Del Pino, E. Schmitt, M.N. Corrêa
      Pages: 1 - 8
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      This study was conducted to evaluate the effects of subclinical hypocalcemia (SCH) on serum concentrations of acute phase proteins (APP) during the peripartum period of Holstein cows and to correlate this disorder with biochemical parameters, body condition score (BCS), body weight (BW), and milk production. According to total calcium concentrations (Cat) before calving, the animals were divided into two groups: normocalcemic (NC; >8.5 mg dL−1, n = 13) and SCH (≤8.5 mg dL−1, n = 7). Blood samples were collected in the prepartum and postpartum to determine serum concentrations of glucose, aspartate aminotransferase, phosphorus, Cat, non-esterified fatty acids, insulin, and APP: albumin (ALB), haptoglobin (HP), and paraoxonase (PON) were analysed. Prepartum, SCH group showed an increase in HP concentrations and decreased ALB related to NC. Postpartum, SCH group showed a greater decrease in BCS and BW, a reduction in negative acute phase proteins ALB and PON and increased HP, and lower milk production than NC cows. We observed that during the peripartum SCH cows experienced more evident changes in their metabolism, alterations in the synthesis of APP, BCS, BW, and milk production, there by demonstrating the importance of calcium homeostasis for health and production of dairy cows.
      Citation: Canadian Journal of Animal Science
      PubDate: 2017-06-15T07:00:00Z
      DOI: 10.1139/cjas-2016-0184
       
  • Effect of moderate alterations of dietary protein or lysine on indices of
           lysine metabolism in liver, kidney, and heart of growing pigs
    • Authors: S.K. Gatrell, L.E. Berg, J.G. Grimmett, J.S. Moritz, K.P. Blemings
      Pages: 9 - 17
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      Lysine addition to swine diets via either feed-grade lysine or protein sources costs producers. To better understand how diet affects lysine oxidation (LOX), weanling pigs were fed a control (C), high protein (HP), low protein (LP), high lysine (HL), or low lysine (LL) diets. No diet-induced alterations in lysine catabolism were detected in heart or kidney (P > 0.05). Liver lysine α-ketoglutarate reductase (LKR) (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2017-06-20T07:00:00Z
      DOI: 10.1139/cjas-2016-0186
       
  • Characteristics of carcass and meat of heifers finished on pasture amended
           with different supplement frequency and soybean oil source
    • Authors: Márcia C.A. Santana, Juliana D. Messana, Giovani Fiorentini, Josiane F. Lage, Paulo H.M. Dian, Roberta C. Canesin, Ricardo A. Reis, Telma T. Berchielli
      Pages: 32 - 43
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      Our objective was to investigate the effects of supplements with soybean oil source, administered either daily or three times per week, on meat quality and carcass characteristics of heifers finished on pasture. Forty-two crossbred heifers aged 17 ± 3 mo with an initial mean body weight (BW) of 297.1 ± 13.5 kg were selected for pasture finishing. The animals were randomly assigned to six treatments. Each treatment consisted of two feeding frequencies, daily (DAI; seven times per week, supplemented at 0.75% BW) or alternating (MWF; three times per week, on Monday, Wednesday, and Friday, supplemented at 1.75% BW on each day), and three different soybean oil sources: soybean oil (SO), rumen-protected fat (RPF), and whole soybean (WS). There was no interaction (P > 0.05) between the feeding frequencies and soybean oil source on meat quality and carcass characteristics. Supplements with WS resulted in a greater C18:0 concentration in the longissimus muscle compared with those with SO or RPF (P = 0.02). Supplements with SO increased the rumenic acid deposition, the total monounsaturated fatty acids, and the monounsaturated:saturated fatty acids ratio (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2017-06-20T07:00:00Z
      DOI: 10.1139/cjas-2016-0185
       
  • Cordyceps militaris hot water extract inhibits lipopolysaccharide-induced
           inflammatory response in porcine alveolar macrophages by the regulation of
           mitogen-activated protein kinase signaling pathway
    • Authors: Felix Shih-Hsiang Hsiao, Yeong-Hsiang Cheng, Szu-Kai Wang, Yu-Hsiang Yu
      Pages: 44 - 52
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      Cordyceps militaris is a rare and exotic medicinal mushroom used in traditional Chinese medicine. The secondary metabolite, cordycepin (3′-deoxyadenosine), produced from C. militaris is a biologically active compound. Cordycepin has been demonstrated to exert several pharmacological effects, such as anti-microbial and anti-tumor activities. However, the effect of cordycepin on the immune modulation of porcine alveolar macrophages (PAM) is poorly investigated. In the current study, we investigated the immunomodulatory effect of cordycepin from C. militaris hot water (CMHW) extract on lipopolysaccharide (LPS) simulated PAM. The CMHW significantly reduced LPS-stimulated nitric oxide production and cyclooxygenase-2 protein expression levels in a dose-dependent manner. The LPS-induced phosphorylation of p38 was impaired by CMHW treatment, thereby decreasing pro-inflammatory cytokine secretion, including tumor necrosis factor-α, interleukin-1β, and interleukin-6. Similar to CMHW, cordycepin also had similar effects on LPS-stimulated PAM. Taken together, these findings demonstrate that CMHW has an inhibitory effect on LPS-induced inflammatory responses in PAM through regulation of the p38 mitogen-activated protein kinase signaling pathway. Thus, CMHW is a potential novel feed additive for immunomodulation in farm animals.
      Citation: Canadian Journal of Animal Science
      PubDate: 2017-07-17T07:00:00Z
      DOI: 10.1139/cjas-2016-0244
       
  • Validation of the first objective evaluation system for beef carcasses
    • Authors: Karolina Wnęk, Marcin Gołębiewski, Tomasz Przysucha
      Pages: 53 - 60
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      Systems that objectively assess beef carcasses are becoming more common in slaughterhouses. The objectives of this study were to investigate differences in the EUROP classification of beef carcasses between independent national senior assessors and abattoir assessors, and to investigate the results of calibration and validation tests for the German VBS 2000 system in Poland. All the procedures involving calibration sample analysis and the certification test were conducted in accordance with the guidelines of Commission Regulation (EC) No. 1249/2008. The results show that evaluations provided by abattoir assessors significantly differ to those given by national assessors (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2017-07-26T07:00:00Z
      DOI: 10.1139/cjas-2016-0241
       
  • Utility of an in vitro test with rumen fluid from slaughtered cattle for
           capturing variation in methane emission potential between cattle types and
           with age
    • Authors: Shaopu Wang, Jana Pisarčíková, Michael Kreuzer, Angela Schwarm
      Pages: 61 - 72
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      Differences in methane emission between cattle types and 273–4903-d-old cattle were evaluated. Rumen content from 59 beef and 32 dairy cattle, collected at an abattoir, was used for in vitro incubation with a forage-based diet alone or supplemented with extruded linseed. Incubating rumen fluid from dairy cows yielded lower methane per gram of diet dry matter (DM) incubated (−5.5%), methane/total gas ratios (−8.5%), and ammonia concentrations (−38%) than that from beef cattle. Linseed decreased methane yield (−6.5%), total gas production (−3.6%), and methane/total gas ratio (−2.7%). High emitters responded slightly more to linseed than low emitters. Lower methane yield (−15%), total gas (−11%), and ammonia concentrations (−20%), and a trend for lower methane/total gas ratios (−5.2%) were found in Limousin × Brown Swiss than in Limousin × Holstein. In beef cattle, methane yield increased (up to 40 mL g−1 DM) with age in a linear manner, whereas in overall dairy and beef animals the relationship was curvilinear (high in young and old animals) concerning methane/total gas ratio and ammonia concentration (trend in beef). In conclusion, rumen fluid from slaughtered animals may be useful to study variations in methane emission from different cattle types.
      Citation: Canadian Journal of Animal Science
      PubDate: 2017-07-26T07:00:00Z
      DOI: 10.1139/cjas-2016-0238
       
  • Modelling lactation curves of dairy goats by fitting random regression
           models using Legendre polynomials or B-splines
    • Authors: L.F. Brito, F.G. Silva, H.R. Oliveira, N.O. Souza, G.C. Caetano, E.V. Costa, G.R.O. Menezes, A.L.P. Melo, M.T. Rodrigues, R.A. Torres
      Pages: 73 - 83
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      A total of 17 356 test-day milk yield (TDMY) records from 642 first lactations of Alpine goats were used to model variations in lactation curve using random regression models (RRM). Orthogonal Legendre polynomials and B-splines were evaluated to obtain adequate and parsimonious models for the estimation of genetic parameters. The analysis was performed using a single-trait RRM, including the additive genetic, permanent environmental, and residual effects. We estimated the mean trend of milk yield, and the additive genetic and permanent environmental covariance functions through random regression using different orders of orthogonal Legendre polynomial (three to six) and B-spline functions (linear, quadratic, and cubic, with three to six knots). This study further evaluated different number of classes of residual variances. The covariance components and the genetic parameters were estimated using the restricted maximum likelihood method. Heritability estimates presented similar trends for both functions. The RRM with a higher number of parameters better described the genetic variation of TDMY throughout the lactation. The most suitable RRM for genetic evaluation of TDMY of Alpine goats is a quadratic B-spline function with six knots, for the mean trend, curves of additive genetic and permanent environmental effects, and five classes of residual variance.
      Citation: Canadian Journal of Animal Science
      PubDate: 2017-07-17T07:00:00Z
      DOI: 10.1139/cjas-2017-0019
       
  • Variation in fur farm and wild populations of the red fox, Vulpes vulpes
           (Carnivora: Canidae) — Part II: Craniometry
    • Authors: Magdalena Zatoń-Dobrowolska, Magdalena Moska, Anna Mucha, Heliodor Wierzbicki, Maciej Dobrowolski
      Pages: 84 - 97
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      The skulls of 165 red foxes (75 wild and 90 farm-bred individuals) collected in Poland in the years 2012–2014 were measured, analysed, and compared to further investigate the effect of ancestry and selective breeding on craniometrical variation between wild and farm red fox populations. Univariate comparisons of skull measurements (19 cranial traits), as well as four craniometric indices, revealed significant differences among vast majority of the studied measurements. Principal component analyses and two-dimensional plots showed almost complete separation of the two studied populations of the red fox, as well as clear separation of sexes between populations and within the farm population. This may suggest that the selective forces (artificial vs. natural selection) acting upon cranial morphology of the red fox vary between wild and farm populations. Furthermore, the second important factor which cannot be ignored when considering morphological differences between wild and farm foxes is the origin of compared populations (the Eurasian wild red fox population vs. the red foxes of North American origin — a founder population of farm foxes). Thus, the ancestry of the farm foxes is discussed as well.
      Citation: Canadian Journal of Animal Science
      PubDate: 2017-07-14T07:00:00Z
      DOI: 10.1139/cjas-2017-0015
       
  • Response of Ross 308 and 708 broiler strains in growth performance and
           lipid metabolism to diets containing tributyrate glycerides
    • Authors: Andrea Bedford, Hai Yu, Marta Hernandez, E. James Squires, Steven Leeson, Yongqing Hou, Joshua Gong
      Pages: 98 - 108
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      Tributyrin is a butyrate glyceride, shown to have positive effects on broiler performance. This study investigated the differences in growth performance between Ross 308 and Ross 708 birds, and compared how each strain responds to tributyrin supplementation. Two-hundred-and-forty-day-old Ross 308 and 240-d-old Ross 708 chicks were divided and fed a basal diet, or diets supplemented with low or high levels of tributyrin for 35 d. Neither strain nor tributyrin supplementation had an effect on average daily gain or feed:gain (P > 0.05). All Ross 708 birds had significantly decreased relative abdominal fat weight at 3 and 5 wk of age compared with Ross 308 birds of the same treatment (P ≤ 0.05). Tributyrin supplementation only decreased relative abdominal fat weight compared with controls in Ross 708 birds at 5 wk of age (P ≤ 0.05). Ross 708 control birds had significantly higher breast muscle fat deposition than Ross 308 controls (P ≤ 0.05), and tributyrin lowered this deposition in both strains (P ≤ 0.05). Significant differences in hepatic expression of genes associated with lipid metabolism were observed between strains, and with tributyrin supplementation (P ≤ 0.05). These results support the modulation of lipid metabolism by tributyrin, and show different broiler strains responded uniquely to tributyrin supplementation.
      Citation: Canadian Journal of Animal Science
      PubDate: 2017-07-14T07:00:00Z
      DOI: 10.1139/cjas-2017-0025
       
  • By-product of passion fruit seed (Passiflora edulis) in the diet of
           broilers
    • Authors: Leonardo Henrique Zanetti, Alice Eiko Murakami, Mayra Diaz-Vargas, Ana Flávia Quiles Garcia Guerra, Ivan Camilo Ospina-Rojas, Guilherme Rodrigues do Nascimento, Tatiana Carlesso dos Santos, Paula Toshimi Matumoto Pintro
      Pages: 109 - 118
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      Two experiments were performed to determine the chemical composition of by-product of passion fruit seed (BPFS) and to evaluate the performance, blood variables, carcass yield, meat quality, and oxidation of broilers fed diets containing increasing levels of BPFS. In experiment 1, a total of 60 twenty-one-day-old Cobb male broilers were distributed in a completely randomized design, with two treatments (reference feed and test diet) and five replicates of 6 birds each. Energy content in BPFS was 3945 kcal kg−1 of apparent metabolizable energy corrected for nitrogen balance and 10.68% crude protein. In experiment 2, a total of 864 one-day-old male Cobb broilers were distributed in a completely randomized design, with six treatments (control, 2.5%, 5.0%, 7.5%, 10%, and 12.5% BPFS) and six replicates of 24 birds each. Feed conversion linearly worsened (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2017-07-26T07:00:00Z
      DOI: 10.1139/cjas-2016-0210
       
  • Effect of dietary supplementation of silicic acid powder containing bamboo
           vinegar on production performance, egg quality, intestinal microflora, and
           morphology of laying hens
    • Authors: Jessada Rattanawut, Areerat Todsadee, Koh-en Yamauchi
      Pages: 119 - 125
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      This study investigated the effects of dietary inclusion of silicic acid powder containing bamboo vinegar liquid (SPV) on production performance, egg quality, intestinal microflora, and alterations of intestinal villi in laying hens. Eighty ISA Brown hens were randomly divided into four treatment groups, with five replicates per treatment and four hens per replicate. They were fed ad libitum, a basal diet supplemented with SPV at 0, 2, 4, or 6 g kg−1 level, for 16 wk. Egg production significantly increased with the 2 g kg−1 SPV diet for hens of 34–37 wk old, while egg mass was highest for hens fed the 2 g kg−1 SPV diet in 38–41 wk age range (P  0.10). In the ileal content, populations of Escherichia coli and Salmonella spp. tended to decrease in the SPV-supplemented groups compared with the control group (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2017-07-28T07:00:00Z
      DOI: 10.1139/cjas-2017-0041
       
  • Influence of Enterococcus faecium and endo-1,4-β-xylanase supplementation
           on growth performance, nutrient digestibility, fecal microflora, fecal gas
           emission, and meat quality in finishing pigs fed with diets based on
           corn–soybean meal
    • Authors: D.H. Nguyen, K.Y. Lee, H.N. Tran, S.D. Upadhaya, Y.J. Jeong, I.H. Kim
      Pages: 126 - 134
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      This study was conducted to evaluate the effect of Enterococcus faecium (EF) and endo-1,4-β-xylanase (XY) in finishing pigs. The pigs were randomly divided into four treatments with eight replications per treatment and four pigs per pen in a 2 × 2 factorial arrangement with two levels of EF (0 or 0.1 g kg−1 of feed) and XY (0 or 0.1 g kg−1 of feed). During 0–12 wk, average daily gain and gain to feed ratio (G:F) increased by addition of EF in the diets (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2017-08-01T07:00:00Z
      DOI: 10.1139/cjas-2016-0197
       
  • Intake and digestibility of sheep-fed alfalfa haylage supplemented with
           corn
    • Authors: Marina Vranić, Darko Grbeša, Krešimir Bošnjak, Tomislav Mašek, Dario Jareš
      Pages: 135 - 143
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      The objective of this study was to determine the effect of dry corn (DC) and fermented corn (FC) supplemented to alfalfa haylage (AH) (Medicago sativa L.) on feed intake, digestibility, and nitrogen (N) balance in wether sheep. The study consisted of five feeding treatments incorporating AH alone and AH supplemented with 5 or 10 g of DC (DC5 and DC10, respectively) or FC (FC5 and FC10, respectively) kg−1 body weight (BW) d−1 to Suffolk wethers. The DC5 and FC5 treatments were higher in acid detergent fibre (ADF) intake (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2017-08-01T07:00:00Z
      DOI: 10.1139/cjas-2015-0168
       
  • Effects of alanyl-glutamine supplementation on the small intestinal mucosa
           barrier in weaned piglets challenged with lipopolysaccharide
    • Authors: S. Xing, B.L. Zhang, M. Lin, J.L. Li, L. Zhang, F. Gao, G.H. Zhou
      Pages: 144 - 155
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      The objectives of this study were to investigate the effects of alanyl-glutamine (Ala-Gln) dipeptide supplementation on the intestinal mucosa barrier in weaned piglets challenged by lipopolysaccharide (LPS). A total of 96 piglets were arranged in a 2 × 2 factorial design and randomly divided into four groups. The main effects were LPS challenge (0 or 100 μg kg−1 body weight) and diets (0.62% Ala or 0.5% Ala-Gln). The results showed that LPS challenge significantly increased the crypts depth and decreased the villi height of small intestine in the piglets (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2017-08-03T07:00:00Z
      DOI: 10.1139/cjas-2016-0039
       
  • Effects of level of barley and corn in concentrate-fed Boer kids on growth
           performance, meat quality, and muscle fatty acid composition
    • Authors: M.-E. Brassard, P.Y. Chouinard, R. Gervais, É. Pouliot, C. Gariépy, D. Cinq-Mars
      Pages: 156 - 165
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      This experiment was conducted to compare the impact of corn and barley on growth performance, meat quality, and muscle fatty acid (FA) composition of goat kids. Twenty-four Boer males (25.1 ± 1.5 kg) were blocked by body weight and allotted randomly within block to one of three experimental diets. Treatments consisted in varying ratios of barley to corn in the concentrate: (1) 100:0, (2) 50:50, and (3) 0:100. Fifteen randomly selected kids (n = 5 kids per treatment) were slaughtered and longissimus thoracis et lumborum was collected. Inclusion of barley in the diet linearly increased concentrate intake (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2017-07-28T07:00:00Z
      DOI: 10.1139/cjas-2017-0026
       
  • Effect of growth-promoting implants and high-voltage electrical
           stimulation on quality characteristics of finished steers
    • Authors: Ó. López-Campos, W.M. Robertson, M.E.R. Dugan, I.L. Larsen, J.C. Roberts, J.L. Aalhus
      Pages: 166 - 176
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      The present study evaluated the impact of growth-promoting implants and their interaction with high-voltage electrical stimulation (HVES) on meat quality of steers at time of grading (24 h) and following wet ageing (6 and 14 d). Ninety-six crossbred steers were assigned for implanting (120 mg trenbolone acetate and 24 mg estradiol benzoate) or control (nonimplanted). During the slaughter process, HVES was applied to alternate carcass sides. Implanted steers were heavier (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2017-08-08T07:00:00Z
      DOI: 10.1139/cjas-2016-0155
       
  • Evaluation of barley silage with varying ruminal in vitro fiber
           digestibility on lactation performance and chewing activity of lactating
           dairy cows in comparison with corn silage
    • Authors: Basim Refat, David A. Christensen, John J. Mckinnon, Luciana L. Prates, Jayakrishnan Nair, Aaron D. Beattie, Wenzhu Yang, Tim A. McAllister, Peiqiang Yu
      Pages: 177 - 186
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      There is limited knowledge on the effect of barley silage (BS) with different ruminal in vitro neutral detergent fiber digestibility (ivNDFD) on dairy cow performance and chewing activity. The objective of this study was to assess the effects of BS varieties selected for varying rates of ivNDFD on lactation performance and chewing activity of high-yield dairy cows in comparison with a new corn silage (CS) hybrid. A 4 × 4 Latin square design was applied in this study with four mid-lactating multiparous Holstein cows. The cows were fed diets containing 49% barley-based concentrate and 51% forage (dry matter basis). The results show that cows fed CS produced more milk (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2017-08-22T07:00:00Z
      DOI: 10.1139/cjas-2016-0191
       
  • An evaluation of natural and synthetic vitamin E supplementation on growth
           performance and antioxidant capacity of broilers in early age
    • Authors: Kang Cheng, Min Zhang, Xianxiao Huang, Xiaochuan Zheng, Zhihua Song, Lili Zhang, Tian Wang
      Pages: 187 - 193
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      The effects of natural (d-α-tocopherol) and synthetic (dl-α-tocopherol acetate) vitamin E on growth performance and antioxidant capacity of broilers in early age were investigated. A total of 144 one-day-old Arbor Acres broilers were randomly divided into three treatments (48 birds in each treatment). The birds in the control group were fed the basal diet whereas those in the treatment groups were fed basal diets supplemented with 20 IU kg−1 dl-α-tocopherol acetate or 20 IU kg−1 d-α-tocopherol for 21 d, respectively. Vitamin E supplementation, irrespective of source, significantly increased (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2017-08-22T07:00:00Z
      DOI: 10.1139/cjas-2017-0040
       
  • True phosphorus digestibility of camelina meal in broiler chickens
    • Authors: A.Y. Pekel, S.A. Adedokun, O. Adeola
      Pages: 194 - 203
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      This study was conducted to determine the true digestibility of phosphorus (P) in two different cold-pressed camelina meals using regression method. Six semi-purified experimental diets containing 120, 240, or 360 g of camelina meal (CM) per kilogram from camelina meal 1 (CM1) and camelina meal 2 (CM2) were formulated. A total of 384 male Ross 708 broilers were allocated to six dietary treatments with eight cages per treatment from day 18 to day 23 post hatching in a randomized complete block design. The result showed that body weight gain, gain:feed ratio, ileal dry matter (DM) digestibility, DM and nitrogen (N) retention decreased (linear, P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2017-09-07T07:00:00Z
      DOI: 10.1139/cjas-2017-0075
       
  • Comparative analysis of tissue expression and methylation reveals the
           crucial hypoxia genes in hypoxia-resistant animals
    • Authors: Yong Wang, Meirong Luo, Mingfeng Jiang, Yaqiu Lin, Jiangjiang Zhu
      Pages: 204 - 212
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      Tibetan goat and Tibetan sheep are species peculiar to Qinghai–Tibetan Plateau which is the highest plateau in the world, and have high hypoxia resistance to the extremely bad environment. Unlike monogastrics, how the genes change responding to hypoxia in ruminants remains unclear. In this study, three healthy animals of Tibetan sheep, Tibetan goat, Chuanzhong goat, and Small-tailed Han sheep were selected. The expression of factor inhibiting hypoxia-inducible factor 1 (FIH 1) hypoxia-inducible factor 1α (HIF-1α), HIF-3α, and erythropoietin (EPO) in various tissues, including heart, liver, lungs, kidney, muscle, and brain, was investigated. The EPO was observed highly expressed in all the tissues of Tibetan goats and Tibetan sheep compared with low-altitude animals, respectively, implied that higher expression of EPO may give the explanation for the hypoxia resistance of plateau animals. Besides, we also cloned the promoters of FIH-1, HIF-1α, HIF-3α, and EPO in goats and sheep, analyzed their core regions and CpG islands. Higher methylation rate was observed in HIF-1α, HIF-3α, and EPO, whereas lower methylation rate hit on FIH-1. These data may be beneficial for revealing the response mechanism to hypoxia of plateau animals.
      Citation: Canadian Journal of Animal Science
      PubDate: 2017-08-31T07:00:00Z
      DOI: 10.1139/cjas-2017-0021
       
  • Effects of slaughter weight and growth rate on the longissimus muscle
           metabolic characteristics, and pork sensory quality in pigs of two sexes
    • Authors: Yan Duan, Luigi Faucitano, Joël Rivest, Nancy Graveline, Simon Cliche, Claude Gariépy
      Pages: 213 - 220
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      A total of 119 pigs were used to investigate the effect of slaughter weight (107, 115, and 125 kg), growth rate (fast vs. slow), and sex (barrows vs. gilts) on the longissimus muscle biochemical and sensory traits. Increasing slaughter weight to 125 kg resulted in greater postmortem activity of calpastatin (P = 0.01), lactate dehydrogenase (P = 0.01), and citrate synthase (P = 0.02). Pork toughness and juiciness at 6 d were affected by the interaction slaughter weight × growth rate × sex, with pork being tougher (P = 0.04) and juicer (P = 0.03) in slow-growing gilts slaughtered at 125 and 115 kg, respectively. Flavour was scored higher (P = 0.03) in pork from gilts than from barrows. Overall, based on the slight and likely undetectable differences by the average consumer in the meat sensory traits, it can be concluded that slaughter weight can be increased to 125 kg without appreciable effect on the sensory properties.
      Citation: Canadian Journal of Animal Science
      PubDate: 2017-10-05T07:00:00Z
      DOI: 10.1139/cjas-2017-0032
       
  • Using portable near-infrared spectroscopy to predict pig subcutaneous fat
           composition and iodine value
    • Authors: N. Prieto, M.E.R. Dugan, M. Juárez, Ó. López-Campos, R.T. Zijlstra, J.L. Aalhus
      Pages: 221 - 229
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      This study tested the potential of portable near-infrared spectroscopy (NIRS) to predict fatty acids (FA) composition and iodine value (IV) of pig subcutaneous fat. Following carcass splitting, the inner layer of subcutaneous fat at the shoulder from the left carcass side was scanned using a hand-held NIRS probe (350–2500 nm) and analysed for FA composition using gas chromatography. The NIRS successfully predicted the total polysaturated fatty acids (PUFA) and n-3 FA proportions, polyunsaturated/saturated fatty acids (PUFA/SFA) ratio, and IV (R2 = 0.90–0.95; root-mean-square error of prediction, RMSEP = 0.019%–1.03% total FA). This portable technology also met the requirements for a quick screening of the proportions of total SFA, monounsaturated fatty acids (MUFA) and n-6 FA, n-6/n-3 ratio, and some individual FA such as C18:2n-6 and C18:3n-3 (R2 = 0.80–0.89; RMSEP = 0.37%–1.11% total FA). However, unreliable predictions were found for other individual FA with low variability (coefficient of variation = 4%–8%) such as C16:0, C18:0, and C18:1 (R2 = 0.60–0.77; RMSEP = 0.76%–1.00% total FA). These results show portable NIRS as a suitable technology to predict pig fat quality. In addition, this study has been successful in implementing this portable NIRS technology in a research abattoir to collect spectra directly on the carcass, which would enable carcass sorting based on fat composition or hardness for marketing purposes.
      Citation: Canadian Journal of Animal Science
      PubDate: 2017-10-05T07:00:00Z
      DOI: 10.1139/cjas-2017-0033
       
  • Tenderness and sensory attributes of 11 muscles from carcasses within the
           Canadian cull cow grades
    • Authors: Jordan C. Roberts, Argenis Rodas-González, Manuel Juárez, Óscar López-Campos, Ivy L. Larsen, Jennifer L. Aalhus
      Pages: 230 - 240
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      The eating quality and shear force of meat from mature beef carcasses graded within the Canadian grading system were compared with youthful carcasses. Eleven muscles were obtained from mature-graded carcasses with >50% ossification (D1, D2, D3, and D4; n = 84) and youthful carcasses with
      Citation: Canadian Journal of Animal Science
      PubDate: 2017-10-17T07:00:00Z
      DOI: 10.1139/cjas-2017-0105
       
  • Effects of dietary lysine level on the content and fatty acid composition
           of intramuscular fat in late-stage finishing pigs
    • Authors: Taiji Wang, Mark A. Crenshaw, Naresh Regmi, Brian J. Rude, M. Shamimul Hasan, Anuraj T. Sukumaran, Thu Dinh, Shengfa F. Liao
      Pages: 241 - 249
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      This study was conducted to investigate how dietary lysine level affects the intramuscular fat (IMF) content and fatty acid (FA) composition in late-stage finishing pigs. Nine crossbred barrows [94.4 ± 6.7 kg body weight (BW)] were randomly allotted to three treatment groups (n = 3). Three corn- and soybean-meal-based diets were formulated to meet the National Research Council (2012) requirements for various nutrients except for lysine, whose concentrations were 0.43%, 0.71%, and 0.98% (as-fed basis) for Diets 1 (lysine-deficient), 2 (lysine-adequate), and 3 (lysine-excess), respectively. After 5 wk of ad libitum access to diets, pigs were harvested and longissimus dorsi samples were collected. The IMF content and FA composition of the samples were analyzed by gas chromatography. Results showed that the IMF content of the muscle was increased linearly (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2017-11-15T08:00:00Z
      DOI: 10.1139/cjas-2017-0083
       
  • Producer perceptions of manual and automated milk feeding systems for
           dairy calves in Canada
    • Authors: Catalina Medrano-Galarza, Stephen J. LeBlanc, Andria Jones-Bitton, Trevor J. DeVries, Jeffrey Rushen, Anne Marie de Passillé, Derek B. Haley
      Pages: 250 - 259
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      As part of a cross-sectional survey, Canadian dairy producers were asked a set of questions to (1) determine factors that influenced them to continue using manual milk feeding (MMF) systems or to switch to automated milk feeding (AMF) and (2) investigate producers’ perceived advantages and disadvantages regarding both feeding systems. A total of 670 responses were received. Among respondents, 16% used AMF and 84% used MMF. The four most frequent factors that producers reported as important in motivating them to switch to AMF were to raise better calves, offer more milk to calves, reduce labor, and improve working conditions. For MMF farms, investment in equipment and group housing facilities, as well as farm size, were the primary reasons reported for their continued use of MMF systems. The principal perceived advantages of having an AMF were that calves are able to express natural behaviors and drink more milk without increased labor input. For MMF systems, the main perceived advantage was related to easier identification of sick calves. Results provide insights into factors affecting the choice of calf feeding methods by dairy producers, and improve understanding of producers’ needs and expectations regarding calf management and adoption of technology.
      Citation: Canadian Journal of Animal Science
      PubDate: 2017-10-23T07:00:00Z
      DOI: 10.1139/cjas-2017-0038
       
  • Influence of a cocktail of protease and xylanase in different energy
           densities of corn- and soybean-meal-based diet on growth performance,
           nutrient digestibility, carcass quality, and gas emission in broilers
    • Authors: D.H. Nguyen, H.N. Tran, H.M. Yun, I.H. Kim
      Pages: 271 - 278
      Abstract: Canadian Journal of Animal Science, e-First Articles.
      A total of 480 one-day-old male Ross 308 broilers with an average initial body weight (BW) of 42 ± 1 g was randomly divided into four treatments (8 replicates/treatment, 15 birds/replicate) by their BW to evaluate the influence of a cocktail of protease and xylanase in different energy density of corn- and soybean-meal-based diet on broilers. This experiment lasted for 35 d and there were two phases; starter (1–18 d) and finisher (19–35 d). The experiment was a 2 × 2 factorial arrangement with two levels of metabolizable energy and the cocktail enzyme with 200 mg of protease kg−1 diet and 100 FXU xylanase kg−1 diet. Both high-nutrient density and cocktail enzyme supplementation increased (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2017-12-03T08:00:00Z
      DOI: 10.1139/cjas-2017-0091
       
 
 
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