A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z  

              [Sort alphabetically]   [Restore default list]

  Subjects -> ANIMAL WELFARE (Total: 107 journals)
Showing 1 - 22 of 22 Journals sorted by number of followers
Journal of Veterinary Internal Medicine     Open Access   (Followers: 29)
Animal Welfare     Full-text available via subscription   (Followers: 27)
Animal Nutrition     Open Access   (Followers: 21)
Ethics and Social Welfare     Hybrid Journal   (Followers: 21)
Animal Cognition     Hybrid Journal   (Followers: 20)
Journal of Applied Animal Welfare Science     Hybrid Journal   (Followers: 19)
Journal of Comparative Social Welfare     Hybrid Journal   (Followers: 16)
Society and Animals     Hybrid Journal   (Followers: 14)
European Journal of Wildlife Research     Hybrid Journal   (Followers: 13)
Social Choice and Welfare     Hybrid Journal   (Followers: 11)
Journal of Experimental Psychology : Animal Learning and Cognition     Full-text available via subscription   (Followers: 11)
Animals     Open Access   (Followers: 11)
Wildfowl     Open Access   (Followers: 11)
Alternatives to Laboratory Animals     Full-text available via subscription   (Followers: 9)
Veterinary Clinical Pathology     Hybrid Journal   (Followers: 9)
Acrocephalus     Open Access   (Followers: 9)
Companion Animal     Full-text available via subscription   (Followers: 8)
Australian Mammalogy     Hybrid Journal   (Followers: 8)
Asian Journal of Animal and Veterinary Advances     Open Access   (Followers: 8)
Animal Studies Journal     Open Access   (Followers: 7)
Canadian Journal of Animal Science     Hybrid Journal   (Followers: 6)
Journal of Research in Forestry, Wildlife and Environment     Open Access   (Followers: 6)
African Journal of Wildlife Research     Full-text available via subscription   (Followers: 6)
Journal of Applied Animal Research     Open Access   (Followers: 5)
Agrivet : Jurnal Ilmu-Ilmu Pertanian dan Peternakan / Journal of Agricultural Sciences and Veteriner)     Open Access   (Followers: 5)
Equine Health     Full-text available via subscription   (Followers: 4)
Animal - Science Proceedings     Full-text available via subscription   (Followers: 4)
Asian Journal of Cell Biology     Open Access   (Followers: 4)
Bangladesh Journal of Animal Science     Open Access   (Followers: 4)
Natural History Sciences     Open Access   (Followers: 4)
Journal of Wildlife and Biodiversity     Open Access   (Followers: 4)
Journal of Botany     Open Access   (Followers: 4)
Nutrición Animal Tropical     Open Access   (Followers: 3)
Animal Frontiers     Hybrid Journal   (Followers: 3)
Asian Journal of Animal Sciences     Open Access   (Followers: 3)
Journal of Animal Science and Biotechnology     Open Access   (Followers: 3)
Animal Research International     Full-text available via subscription   (Followers: 3)
British Poultry Abstracts     Hybrid Journal   (Followers: 3)
Bulletin of Animal Health and Production in Africa     Full-text available via subscription   (Followers: 3)
Journal of Pest Science     Hybrid Journal   (Followers: 2)
South African Journal of Animal Science     Open Access   (Followers: 2)
Between the Species     Open Access   (Followers: 2)
Research Journal of Parasitology     Open Access   (Followers: 2)
International Journal of Health, Animal Science and Food Safety     Open Access   (Followers: 2)
International Journal for Parasitology : Parasites and Wildlife     Open Access   (Followers: 2)
Pastoralism : Research, Policy and Practice     Open Access   (Followers: 2)
Botanical Review     Hybrid Journal   (Followers: 2)
Jurnal Veteriner     Open Access   (Followers: 1)
Majalah Ilmiah Peternakan     Open Access   (Followers: 1)
Animal Diseases     Open Access   (Followers: 1)
Jurnal Agripet     Open Access   (Followers: 1)
Buletin Veteriner Udayana     Open Access   (Followers: 1)
Journal of Applied Animal Ethics Research     Full-text available via subscription   (Followers: 1)
TRACE ∴ Finnish Journal for Human-Animal Studies     Open Access   (Followers: 1)
Journal of Animal Science and Products     Open Access   (Followers: 1)
Applied Animal Science     Hybrid Journal   (Followers: 1)
Pet Behaviour Science     Open Access   (Followers: 1)
Derecho Animal. Forum of Animal Law Studies     Open Access   (Followers: 1)
Indonesian Journal of Animal and Veterinary Sciences     Open Access   (Followers: 1)
Journal of Threatened Taxa     Open Access   (Followers: 1)
Scientific Papers Animal Science and Biotechnologies     Open Access   (Followers: 1)
Australian Holstein Journal     Full-text available via subscription   (Followers: 1)
Global Journal of Animal Scientific Research     Open Access   (Followers: 1)
Advances in Botanical Research     Full-text available via subscription   (Followers: 1)
Revista Mexicana de Ciencias Pecuarias     Open Access   (Followers: 1)
Jurnal Ilmu dan Kesehatan Hewan (Veterinary Science and Medicine Journal)     Open Access   (Followers: 1)
Italian Journal of Animal Science     Open Access   (Followers: 1)
Online Journal of Animal and Feed Research     Open Access   (Followers: 1)
Revista Brasileira de Higiene e Sanidade Animal     Open Access   (Followers: 1)
Revue de primatologie     Open Access   (Followers: 1)
Nigerian Journal of Animal Science     Full-text available via subscription   (Followers: 1)
Buletin Peternakan : Bulletin of Animal Science     Open Access   (Followers: 1)
Archivos de Medicina Veterinaria     Open Access   (Followers: 1)
Revista Colombiana de Ciencias Pecuarias (Colombian journal of animal science and veterinary medicine)     Open Access   (Followers: 1)
veterinär spiegel     Hybrid Journal   (Followers: 1)
Animal Sentience : An Interdisciplinary Journal on Animal Feeling     Open Access   (Followers: 1)
Iranian Journal of Applied Animal Science     Open Access   (Followers: 1)
Journal of Zoological and Botanical Gardens     Open Access  
Archiva Zootehnica     Open Access  
Veterinary and Animal Science     Open Access  
Proceedings of the Vertebrate Pest Conference     Open Access  
Journal of Veterinary Science & Medicine     Open Access  
Human-Wildlife Interactions     Open Access  
Turkish Journal of Veterinary Research     Open Access  
Revista Colombiana de Ciencia Animal     Open Access  
Jurnal Sain Peternakan Indonesia     Open Access  
People and Animals : The International Journal of Research and Practice     Open Access  
Journal of Veterinary and Animal Sciences     Open Access  
Uluslararası Tarım ve Yaban Hayatı Bilimleri Dergisi / International Journal of Agricultural and Wildlife Sciences     Open Access  
Journal of Anatolian Environmental and Animal Sciences     Open Access  
Hayvansal Üretim     Open Access  
Revista de Producción Animal     Open Access  
Jurnal Ilmu-Ilmu Peternakan     Open Access  
Translational Animal Science     Open Access  
Corpoica Ciencia y Tecnología Agropecuaria     Open Access  
RUDN Journal of Agronomy and Animal Industries     Open Access  
Science and Animal Health     Open Access  
Wartazoa. Indonesian Bulletin of Animal and Veterinary Sciences     Open Access  
Spei Domus     Open Access  
Annual Review of Animal Biosciences     Full-text available via subscription  
Rangifer     Open Access  
Revista de Salud Animal     Open Access  

              [Sort alphabetically]   [Restore default list]

Similar Journals
Journal Cover
Canadian Journal of Animal Science
Journal Prestige (SJR): 0.403
Citation Impact (citeScore): 1
Number of Followers: 6  
 
Hybrid Journal Hybrid journal   * Containing 2 Open Access Open Access article(s) in this issue *
ISSN (Print) 0008-3984 - ISSN (Online) 1918-1825
Published by NRC Research Press Homepage  [19 journals]
  • Post-hatch changes in the histological structure of the oviduct and
           associated 17β-estradiol profiles in guinea hens (Numida meleagris)

    • Free pre-print version: Loading...

      Authors: Ibn Iddriss Abdul-Rahman, Jane Robinson
      Abstract: Canadian Journal of Animal Science, Ahead of Print.
      There are limited data available on the biology of guinea fowls. The objective of this study was to document post-hatch histological and stereological changes in the oviducts of 56 guinea hens and associated 17β-estradiol profiles until 32 weeks of age and to explore changes in the oviducal mucosal fold as an index of oviducal growth. Mucosal folds in all regions of the oviduct increased significantly (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2022-05-26T07:00:00Z
      DOI: 10.1139/cjas-2022-0010
       
  • Single nucleotide polymorphisms in the 3′ UTR of follistatin-like 4 and
           scavenger receptor class B member 1 are associated with Dazu black goat
           litter size

    • Free pre-print version: Loading...

      Authors: Ji-Yuan Zhu, Guang-Xin E, Jia-Bo Wang, Shan-Shan Xu, Xiu-Qin Yang
      Abstract: Canadian Journal of Animal Science, Ahead of Print.
      The untranslated regions (UTRs) of genes play crucial roles in regulating gene expression at the post-transcriptional level such as affecting mRNA stabilization. In this study, 26 single nucleotide polymorphisms (SNPs) and one deletion located in UTR were genotyped from 186 Dazu black goats via SNaPshot, and the correlation between genotype and litter size was analyzed. The results indicated that two SNP loci, SNP_chr17-20182525 and SNP_chr7-65652612, which were located at the 3′ UTR of scavenger receptor class B member 1 and follistatin-like 4, were significantly (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2022-05-11T07:00:00Z
      DOI: 10.1139/cjas-2020-0170
       
  • The effects of grinding and pelleting on nutrient composition of Canadian
           pulses

    • Free pre-print version: Loading...

      Authors: Cara L. Cargo-Froom, Rex W. Newkirk, Christopher P.F. Marinangeli, Anna K. Shoveller, Yongfeng Ai, Elijah G. Kiarie, Daniel A. Columbus
      Abstract: Canadian Journal of Animal Science, Ahead of Print.
      Understanding the effects of processing pulses is required for their effective incorporation into livestock feed. To determine the impact of processing, Canadian peas, lentils, chickpeas, and faba beans, plus soybean meal (SBM; as a comparison), were ground into fine and coarse products and pelleted at three different temperatures (60–65, 70–75, and 80–85 °C). Grinding increased crude protein content in all the pulses (P  0.05). Pelleting increased crude protein content in Amarillo peas, Dun peas, and lentils (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2022-04-21T07:00:00Z
      DOI: 10.1139/cjas-2021-0111
       
  • Atmospheric ammonia causes histopathological lesions, cell cycle blockage,
           and apoptosis of spleen in chickens

    • Free pre-print version: Loading...

      Authors: Lin Chen, Tong Cai, Cuiyan Zhao, Shiping Bai, Gang Shu, Changlin Wen, Qinkun Xu, Xi Peng
      Abstract: Canadian Journal of Animal Science, Ahead of Print.
      This experiment was conducted to investigate the effect of atmospheric ammonia (NH3) on histological changes, cell cycle distribution, and apoptosis of the spleen in chickens. Two hundred forty chickens were randomly allocated to the control group (without NH3 challenge) and NH3 group (70 ± 5 ppm NH3). The experiment lasted for 8 days. The results showed that NH3 exposure caused decreased relative weight (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2022-03-23T07:00:00Z
      DOI: 10.1139/cjas-2021-0084
       
  • Electronarcosis protocols in broiler chickens for the halal market

    • Free pre-print version: Loading...

      Authors: Gustavo Henrique Joazeiro de Almeida, Claudia Marie Komiyama, Vivian Aparecida Rios de Castilho, Rodrigo Garófallo Garcia, Maria Fernanda de Castro Burbarelli, Jacqueline Rosa Souza, Erique Ferreira Porifio, Bruna de Souza Eberhart
      Abstract: Canadian Journal of Animal Science, Ahead of Print.
      This study considered the parameters of the halal market to evaluate different protocols for broiler electronarcosis regarding time to return of consciousness, bleeding efficiency, and carcass and meat quality at a broiler slaughterhouse. One hundred and eighty-four 43-day-old male broilers of the Cobb® strain were used. The experimental design used was completely randomized with 46 broilers for each protocol. The protocols used 80 V and 600 Hz, 50 V and 1000 Hz, 60 V and 1000 Hz, and 70 V and 1000 Hz. Time to return of consciousness, bleeding efficiency, bruising, presence of broken bones in pectoral muscle, and meat quality were evaluated. Birds subjected to stunning by the 50 V and 1000 Hz protocol showed the shortest time to return of consciousness after electronarcosis, and high incidence of breast hemorrhage. Birds subjected to the 60 V and 1000 Hz protocol had a higher percentage of broken bones in the pectoralis minor. The 50 V and 1000 Hz electronarcosis protocol fits better to the halal market due to the shorter time to return of consciousness and improved bleeding efficiency. This study suggests new proposals for stunning protocols to serve the halal market.
      Citation: Canadian Journal of Animal Science
      PubDate: 2022-03-21T07:00:00Z
      DOI: 10.1139/cjas-2021-0082
       
  • Potential of eight mutations for marker-assisted breeding in Chinese Lulai
           black pigs

    • Free pre-print version: Loading...

      Authors: Jing Xu, Aimei Jiang, Changzheng Zhang, Yangqing Zheng, Tingrong Zhang, Lisheng Zhou
      Abstract: Canadian Journal of Animal Science, Ahead of Print.
      Molecular marker-assisted selection (MAS) provides an efficient tool for pig breeding. In this study, according to the literature, we selected eight effective or causal mutations from eight functional genes, including five causal mutations in PHKG1 (rs330928088), MUC13 (rs319699771), IGF2 (g.3072 G>A), VRTN (g.20311_20312ins291), and MYH3 (XM_013981330.2:g.-1805_-1810del) genes, and three effective mutations in LIPE (rs328830166), LEPR (rs45435518), and MC4R (rs81219178) genes, to investigate their potential breeding effect in 418 Lulai pigs. The linear model was used to analyse the association between mutations and intramuscular fat (IMF) content, average backfat thickness, and muscle moisture %. The results revealed that amongst the three effective mutations, only the mutation in the LEPR gene, which affects IMF deposition, was significantly associated with IMF content. However, the other molecular markers were not significantly associated with the affected traits reported in previous studies, and these mutations are ineffective for MAS in the Lulai black pig population. Therefore, causal mutations in PHKG1, IGF2, and VRTN genes, and an effective mutation in LEPR gene could be used as effective breeding makers for MAS in Lulai pigs. These results can provide helpful information for further breeding in Lulai black pigs.
      Citation: Canadian Journal of Animal Science
      PubDate: 2022-03-21T07:00:00Z
      DOI: 10.1139/cjas-2021-0108
       
  • Efficacy of three heat-stable microbial phytases on growth performance and
           bone development and strength of broilers fed diets deficient in available
           phosphorus

    • Free pre-print version: Loading...

      Authors: H.S. Solomon, F.A. Adejoro, T.T. Nkukwana
      Abstract: Canadian Journal of Animal Science, Ahead of Print.
      A total of 2340 as-hatched Cobb500 chicks were allocated to 9 treatments, each with 13 replicate pens to evaluate the effects of either three phytase enzymes in a P-deficient diet. Starter and finisher diets consisted of a positive control (PC) and negative control 1 and 2 (NC1 and NC2, respectively). The PC, NC1, and NC2 diets had Ca:avP (available phosphorus) ratios of 0.50, 0.33, and 0.43 in the starter feed, and 0.46, 0.22, and 0.35 in the finisher feed, respectively; NC1 diets were then supplemented with Phytaverse, Quantum Blue, and Axtra-PHY at 500 and 1000 FTU/kg. Enzyme type had significant effects on body weight gain, feed conversion ratio, and production efficiency factor during the 0–7-day period. Interactions between enzyme type and inclusion levels had a significant effect on feed intake (FI) at 1–21-day (P = 0.02) and 1–35-day (P = 0.031) age. While FI decreased as Axtra-PHY inclusion levels increased from 500 to 1000 FTU/kg feed, FI increased in birds supplemented with Quantum Blue, but with no effects on Phytaverse-supplemented birds. Increasing the enzyme dose to 1000 FTU/kg feed improved bone-breaking strength but did not affect growth performance, tibia ash, Ca, or P concentration of the birds.
      Citation: Canadian Journal of Animal Science
      PubDate: 2022-03-16T07:00:00Z
      DOI: 10.1139/CJAS-2020-0188
       
  • The relationship between udder skin surface temperature and milk
           production and composition in dairy cattle (Bos taurus Linnaeus, 1758)

    • Free pre-print version: Loading...

      Authors: Daniel Zaborski, Maria Soroko-Dubrovina, Wilhelm Grzesiak, Mirosław Parafiniuk, Andrzej Modrzejewski, Oleh Klym, Olha Stadnytska, Jerzy Wójcik
      Abstract: Canadian Journal of Animal Science, Ahead of Print.
      The aim of the present study was to determine correlations between udder skin surface temperatures and milk yield and estimated composition in dairy cows. The thermographic images of 34 Polish Holstein–Friesian black-and-white cows were taken in a milking parlor before and after milking. Partial correlation coefficients were calculated between the surface temperatures of the udder hind quarters and milk production traits controlling for age, parity, year, and milking time. Daily milk yield was weakly and nonsignificantly correlated with surface temperatures (rp ranging from −0.19 to 0.21), except for the mean and maximum temperatures of the left hind quarter after milking (rp = 0.40 and rp = 0.38, respectively). There were significant correlations of skin surface temperature with estimated fat content (rp = −0.55 to 0.48), protein content (rp = −0.39 to 0.42), fat yield (rp = −0.42 to 0.54), and protein yield (rp = 0.37 to 0.54). The estimated somatic cell count was significantly correlated with the minimum temperature (rp = −0.54 to −0.36). The estimated urea content was significantly correlated with the minimum temperature (rp = 0.52). A larger sample size is required in future research to confirm these preliminary results.
      Citation: Canadian Journal of Animal Science
      PubDate: 2022-03-04T08:00:00Z
      DOI: 10.1139/CJAS-2021-0092
       
  • Growth performance and heamatobiochemical parameters of broilers fed diets
           containing Artemisia afra essential oil

    • Free pre-print version: Loading...

      Authors: William Zvarivadza, Upenyu Marume
      Pages: 1 - 10
      Abstract: Canadian Journal of Animal Science, Ahead of Print.
      The study was conducted to determine the effects of Artemisia afra Jacq. ex Willd. essential oil inclusion in diets on growth performance and blood parameters in broiler chickens. Four hundred day-old Cobb 500 chicks were randomly allotted to four treatments: NC – negative control (commercial broiler diet without antibiotics), PC – positive control (commercial broiler diet), AA1 – commercial diet + 0.1% A. afra essential oil, and AA2 – commercial diet + 0.3 % A. afra essential oil. Each treatment was replicated 10 times. From the results, birds fed the PC diet had the highest average daily feed intake (105.60 g ± 3.18) and average daily gain (ADG) in the grower phase. The highest ADG in the finisher phase was obtained in the AAI treatment (170.23 g·d−1 ± 2.00), whereas the feed conversion ratio was lower in the essential-oil-containing diets. Diet significantly improved protein utilization efficiency in both grower and finisher phases. Birds fed AA1 had the highest values for neutrophils, monocytes, and eosinophils, whereas those fed the NC diet had the highest alkaline phosphatase levels (102.00 IU·L−1 ± 7.61). The findings of the study suggest the use of A. afra essential oil in broiler diets can positively improve growth and flock health.
      Citation: Canadian Journal of Animal Science
      PubDate: 2022-04-22T03:34:45Z
      DOI: 10.1139/cjas-2020-0113
       
  • The early story of growth hormone-releasing factor in rats, swine, and
           cattle

    • Free pre-print version: Loading...

      Authors: Jean Morisset
      Pages: 1 - 21
      Abstract: Canadian Journal of Animal Science, Ahead of Print.
      Following the discovery of the growth hormone-releasing factor from a human pancreatic tumor by the group of Guillemin at the Salk Institute in California, research on this factor has exploded. This review article is focused on the results obtained early after this discovery and summarizes the biological effects of this releasing factor on the rat digestive system development and above all on pig, steer, and gilt growth as well as on milk production in lactating sows and cows.
      Citation: Canadian Journal of Animal Science
      PubDate: 2022-04-18T01:08:44Z
      DOI: 10.1139/cjas-2021-0044
       
  • First-service pregnancy rate among beef heifers with different residual
           feed intake

    • Free pre-print version: Loading...

      Authors: Amir Behrouzi, Marcos Colazo, Changxi Li, Carolyn Fitzsimmons
      Pages: 1 - 4
      Abstract: Canadian Journal of Animal Science, Ahead of Print.
      The effect of residual feed intake (a measure of feed efficiency) adjusted for backfat thickness (RFIfat) on pregnancy rate (PR) was examined in Angus heifers over 2 yr. High- or Low-RFI heifers were timed artificially inseminated (TAI) with semen from High- or Low-RFI sires, respectively. There was a negative association (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2022-03-09T02:06:26Z
      DOI: 10.1139/cjas-2021-0105
       
  • Comparative digestibility of energy, dry matter, and nutrients by
           gestating and lactating sows fed corn–soybean meal diets without or with
           full-fat or defatted rice bran

    • Free pre-print version: Loading...

      Authors: Gloria A. Casas, Maryane S.F. Oliveira, Charmaine D. Espinosa, H.H. Stein
      Pages: 1 - 5
      Abstract: Canadian Journal of Animal Science, Ahead of Print.
      Twenty-four gestating sows and 24 lactating sows were randomly allotted to three diets with eight replicate sows per treatment in a 3 × 2 factorial arrangement. Different sows were used in gestation and lactation periods. The hypothesis was that digestibility of gross energy (GE), dry matter (DM), and nutrients in lactating sows is not different from that in gestating sows. A corn–soybean-meal diet and two full-fat-rice-bran or defatted rice bran diets were used. Results indicated that regardless of diet, lactating sows had greater (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2022-03-04T08:44:52Z
      DOI: 10.1139/cjas-2021-0086
       
  • Using publicly available weather station data to investigate the effects
           of heat stress on milk production traits in Canadian Holstein cattle

         This is an Open Access Article Open Access Article

    • Free pre-print version: Loading...

      Authors: I.L. Campos, T.C.S Chud, H.R. Oliveira, C.F. Baes, A. Cánovas, F.S. Schenkel
      Pages: 1 - 14
      Abstract: Canadian Journal of Animal Science, Ahead of Print.
      Heat stress imposes a challenge to the dairy industry, even in northern latitudes. In this study, publicly available weather station data were combined with test-day records for milk, fat, and protein yields to identify the temperature–humidity index (THI) thresholds at which heat load starts affecting milk production traits in Canadian Holstein cows. Production loss per THI unit above the threshold for each trait was estimated. Test-day records from 2010 to 2019 from 166,749 cows raised in Ontario and from 221,214 cows raised in Quebec were analyzed. Annual economic losses (EL) due to heat stress were estimated from the average losses of fat and protein yields based on the annual average of 156 d with THI exceeding the calculated thresholds. Average thresholds for the daily maximum (THImax) and daily average (THIavg) THI estimated across lactations in both provinces were THImax (THIavg) 68 (64), 57 (50), and 60 (58) for milk, fat, and protein yield, respectively, indicating that milk components are more sensitive to heat stress. An EL of about $34.5 million per year was estimated. Our findings contribute to an initial investigation into the impact of heat stress on the Canadian dairy industry and provide a basis for genetic studies on heat tolerance.
      Citation: Canadian Journal of Animal Science
      PubDate: 2022-03-04T08:00:00Z
      DOI: 10.1139/cjas-2021-0088
       
  • Effects of nutritional management regimen and residual feed intake (RFI)
           classification on RFI reranking and feeding behaviour for finishing beef
           steers

    • Free pre-print version: Loading...

      Authors: N.N. Ferriman, J.J. Devos, A.M. Edwards, K.M. Wood, C.P. Campbell, I.B. Mandell
      Pages: 1 - 16
      Abstract: Canadian Journal of Animal Science, Ahead of Print.
      Over 2 years, 207 steers were fed an alfalfa/corn silage diet to determine growing phase (GP) residual feed intake (RFI) classification (low, medium, and high) for individual cattle. Steers were then allocated to two finishing management regimens (MR): MR 1 cattle gradually adjusted to an 84.7% concentrate (dry matter (DM) basis) diet; MR 2 included backgrounding on pasture before finishing using the same diet as MR 1 cattle. Treatment differences in growth performance were examined using GP and finishing phase (FP) RFI classifications. Based on GP RFI classification, FP average daily gain was greater in MR 2 cattle (P = 0.01) with no RFI classification differences for most FP performance traits. However, low-RFI steers had lower FP dry matter intake (DMI) and greater G:F (P ≤ 0.05) than high-RFI steers based on FP RFI classification. Low-RFI steers had fewer visits to the feeder with a lower eating rate than high-RFI steers in both production phases (P ≤ 0.05). Extensive RFI reranking occurred between production phases with 64.3% of steers changing RFI classification. Given extensive reranking in the present study, RFI classification was poorly repeatable between growing and finishing production phases when diverse diets are fed and does not accurately predict feed efficiency.
      Citation: Canadian Journal of Animal Science
      PubDate: 2022-03-02T08:16:59Z
      DOI: 10.1139/cjas-2021-0023
       
  • Comparative analysis of antimicrobial resistance and genetic
           characteristics of Escherichia coli from broiler breeder farms in Korea

         This is an Open Access Article Open Access Article

    • Free pre-print version: Loading...

      Authors: Shin-Woo Kim, Koeun Kim, Young Ju Lee
      Pages: 1 - 10
      Abstract: Canadian Journal of Animal Science, Ahead of Print.
      Broiler breeder farms could be a reservoir of Escherichia coli, disseminating antimicrobial resistance and virulence factors. We investigated the antimicrobial resistance of E. coli from nine broiler breeder farms and characterised their resistance and virulence genes. A total of 256 E. coli showed a high level of resistance to tetracycline, nalidixic acid, ampicillin, and cephalothin, followed by trimethoprim–sulfamethoxazole and chloramphenicol. The resistance to nalidixic acid, ampicillin, trimethoprim–sulfamethoxazole, and chloramphenicol showed significant differences among the farms. Among 202 β-lactam-resistant E. coli, 138 carried β-lactamase genes. The most prevalent β-lactamase gene was blaTEM-1, of which the presence differed significantly across the farms. Out of 197 tetracycline-resistant E. coli isolates, tetA and tetB were detected in 164 and 50, with significant differences among the farms. Also, 45 of 196 nalidixic acid-resistant E. coli carried qnrS, whereas 67 of 149 trimethoprim–sulfamethoxazole-resistant E. coli carried sul2. Among the five virulence genes tested, ompT was the most prevalent, and all genes except for iutA distributed significantly different among the farms. The phenotypic and genotypic characteristics of E. coli were significantly different among the farms; therefore, management at the breeder level is required to control the vertical transmission of E. coli.
      Citation: Canadian Journal of Animal Science
      PubDate: 2022-02-25T08:00:00Z
      DOI: 10.1139/cjas-2021-0090
       
  • Effect of sod-seeding bloat-free legumes on pasture productivity, steer
           performance, and production economics

    • Free pre-print version: Loading...

      Authors: B.M. Kelln, G.B. Penner, S.N. Acharya, T.A. McAllister, K. Larson, J.J. McKinnon, B. Biligetu, H.A. Lardner
      Pages: 1 - 16
      Abstract: Canadian Journal of Animal Science, Ahead of Print.
      A 5 yr experiment evaluated the effects of sod-seeding sainfoin and cicer milkvetch into monoculture grass (Lanigan, SK) or legume (Lethbridge, AB) stands on pasture productivity, steer performance, and economics. At Lanigan, sainfoin decreased (treatment × year P = 0.01) from 13% in year 1 to 2% in year 2 (% plant population) and did not differ thereafter, whereas cicer milkvetch maintained a proportion of 16% in the stand. Forage yield was greater (treatment × year; P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2022-02-25T08:00:00Z
      DOI: 10.1139/cjas-2021-0098
       
  • Effet du type de stabulation sur le bien-être des vaches
           laitières en Algérie

    • Free pre-print version: Loading...

      Authors: S. Matallah, N. M’Hamdi, F. Matallah, Z. Bounouala
      Pages: 1 - 7
      Abstract: Canadian Journal of Animal Science, Ahead of Print.
      Le but de la présente étude était d’examiner l’effet du type de stabulation sur le bien-être des vaches laitières de race Holstein dans les fermes du Nord-Est algérien au niveau de quatre wilayas sur la base du protocole d’évaluation Welfare Quality® pour les bovins. Par conséquent, nous avons appliqué ce protocole à 50 fermes laitières en stabulation libre et à 50 en stabulation entravée. Un total de 2200 vaches laitières a été évalué en période hivernale. Il y avait des différences significatives entre les deux types de logements pour la majorité des critères étudiés : confort autour du repos (33, 54 ± 5,60 vs 22,34 ± 2,70), absence de soif prolongée (42,40 ± 6,60 vs 20,40 ± 6,60), facilité de mouvement (100,00 ± 00 vs 44,50 ± 3,40) et absence de blessures (38,50 ± 10,30 vs 25,12 ± 8,40), cependant l’analyse des mesures liées indique d’importants échecs de gestion dans les deux types de logements dans la région d’étude. En effet, de multiples contraintes ont été observées d’ordre alimentaire (indisponibilité de fourrages et non-maitrise du rationnement) et sanitaire (non-respect des normes hygiéniques). Cette situation nécessite d’informer et de communiquer avec l’éleveur sur ce qu’est réellement le bien-être des animaux afin d’améliorer les conditions d’élevage.
      Citation: Canadian Journal of Animal Science
      PubDate: 2022-02-18T08:00:00Z
      DOI: 10.1139/cjas-2021-0001
       
  • Supplemental effect of coated refined fish oil on the performance of
           finishing pigs fed diets containing soybean meal as a partial alternative
           to barley or wheat feed ingredient

    • Free pre-print version: Loading...

      Authors: Sureshkumar Shanmugam, Woo Jeong Seok, Seung Ho Ha, Sung Giu Jin, In Ho Kim
      Pages: 1 - 10
      Abstract: Canadian Journal of Animal Science, Ahead of Print.
      A total of 195 finishing pigs with an average body weight (BW) of 78.65 ± 0.09 kg were assigned to one of three dietary treatments in a 28-d trial. The designated nutritional diets were as follows: CON; TRT1, CON + 0.2% coated refined fish oil; and TRT2, CON + 10% barley + 0.2% coated refined fish oil. The inclusion of coated refined fish oil with the barley-based diet significantly increased BW, average daily gain, and feed conversion ratio of finishing pigs throughout the experimental period. At the end of the experiment, pigs fed coated refined fish oil with the barley-based diet showed a significant improvement on nutrient digestibility of dry matter and nitrogen. Moreover, gas emission of NH3 and H2S concentration were significantly reduced. Also, drip loss during days 5 and 7 was significantly decreased in meat quality analysis of pigs fed coated refined fish oil supplemented to a barley-based diet. Furthermore, dietary coated refined fish oil with barley-based diet had significantly increased fatty acid profile of belly meat and reduced belly fat. In summary, the inclusion of coated refined fish oil with barley diet positively impacts on growth performance and nutritional values of meat quality in finishing pigs.
      Citation: Canadian Journal of Animal Science
      PubDate: 2022-02-18T08:00:00Z
      DOI: 10.1139/cjas-2021-0057
       
  • Testing the ability of contact mats to identify problematic stall
           configurations

    • Free pre-print version: Loading...

      Authors: A. Zambelis, E. Vasseur
      Pages: 1 - 8
      Abstract: Canadian Journal of Animal Science, Ahead of Print.
      Comparing the frequency of cow contact with stall rails across multiple stall designs may help to determine which stall configurations best promote cow ease of movement and reduce injury risk. The objective of this study was to compare the frequency of cow contact with the dividers across different stall treatments using the contact mat (CM) system to identify problematic stall designs. A total of six stall treatments were each tested against for six consecutive weeks against control (CON) stall condition: three treatments that modified the placement of the tie-rail (TRFARM, TRNEW1, TRNEW2) and three separate treatments that increased chain length (LCL), doubled stall width (DSW), and shortened manger wall (SMW) height. CM were affixed to the stall dividers to record the frequency of cow contact per second. Cows were ranked in descending order from highest frequency of divider contact to lowest frequency of divider contact for each week. TRNEW1 and TRNEW2 were the only stall treatments with a consistently lower frequency of divider contact than CON, whereas DSW was consistently higher than CON. The results suggest that the CM system can be used to identify problematic stall configurations to independently substantiate findings related to cow comfort.
      Citation: Canadian Journal of Animal Science
      PubDate: 2022-01-28T08:00:00Z
      DOI: 10.1139/cjas-2021-0109
       
  • Evaluation of biochar products at two inclusion levels on ruminal in vitro
           methane production and fermentation parameters in a Timothy hay-based diet
           

    • Free pre-print version: Loading...

      Authors: G. F. Mengistu, T. A. McAllister, P. J. Tamayao, K. H. Ominski, G. O. Ribeiro, E. K. Okine, E. J. McGeough
      Pages: 1 - 5
      Abstract: Canadian Journal of Animal Science, Ahead of Print.
      This study evaluated the effects of seven biochar products at two levels of inclusion [2.25% or 4.50% diet dry matter (DM)] on DM disappearance (DMD), cumulative gas and methane (CH4) production, ammonia-nitrogen, and volatile fatty acid (VFA) production from Timothy grass hay over 48 h of incubation. Biochar did not affect gas and CH4 production (P ≥ 0.17) nor the DMD or ruminal fermentation (P ≥ 0.12). In conclusion, the biochar, irrespective of level of inclusion, did not exhibit potential to mitigate CH4 emission in a grass hay diet.
      Citation: Canadian Journal of Animal Science
      PubDate: 2022-01-21T08:00:00Z
      DOI: 10.1139/cjas-2021-0069
       
  • Can phytogenic additives improve the performance of broilers and replace
           growth-promoting antibiotics' A meta-analytic approach

    • Free pre-print version: Loading...

      Authors: Gustavo do Valle Polycarpo, Gabrieli Andressa de Lima, Thaís de Souza Ávida, Fábio Sampaio Rosas, Valquíria Cação Cruz-Polycarpo, Jaqueline Dalbello Biller, Bárbara Fernanda da Silva Barbosa, Maria Fernanda de Castro Burbarelli
      Pages: 1 - 12
      Abstract: Canadian Journal of Animal Science, Ahead of Print.
      Phytogenic additives have been studied intensively in broiler chicken production to substitute growth-promoting antibiotics. However, the comprehensive literature on this topic makes it difficult to understand overall results because there are a noticeable number of studies with conflicting conclusions. While several research studies have shown that phytogenic additives may increment broiler chicken’s performance, others make the opposite evident. This study aimed to organize and understand information through meta-analysis considering a great number of publications and the factors that may interfere in the results of phytogenic additives, evaluating whether phytogenic additives can be used as a performance-enhancing additive for broilers, when compared with the effectiveness of growth-promoting antibiotics. The main factor that interferes in the evaluation of phytogenic additives is the microbiological challenge. Phytogenic additives improved average daily gain (ADG) (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2022-01-11T08:00:00Z
      DOI: 10.1139/cjas-2021-0058
       
  • The importance of B vitamins in enhanced precision nutrition of dairy
           cows: the case of folates and vitamin B12

    • Free pre-print version: Loading...

      Authors: Christiane L. Girard, Mélissa Duplessis
      Pages: 1 - 10
      Abstract: Canadian Journal of Animal Science, Ahead of Print.
      Dairy cow diets are generally balanced for energy and major nutrients with B vitamins generally assumed not to be limiting, in spite of their role as coenzymes, essential to many metabolic reactions in protein, carbohydrate, and lipid metabolism. Assuming adequacy of B-vitamin supply may explain some of the discrepancies between the outcomes of metabolic prediction models and measured cow performance. In lactating dairy cow, the amount of B vitamins from the diet and synthesized by the ruminal microbiota is generally sufficient to prevent deficiency symptoms and, as such, is assumed to fulfill requirements. However, reports of beneficial effects of B-vitamin supplementation on dairy cow performance suggest that B-vitamin supply is sometimes lower than its needs, as an insufficient B-vitamin supply decreases metabolic efficiency by driving a shift toward alternative metabolic pathways with greater energy cost. Using information on folates and vitamin B12 illustrated how meeting dairy cow needs for B vitamins should not be overlooked in formulation of rations for lactating dairy cattle. The present review discusses current knowledge and indicates areas presently impeded by the lack of research results, especially the limitations on the ability to estimate B vitamin need and supply.
      Citation: Canadian Journal of Animal Science
      PubDate: 2022-01-11T08:00:00Z
      DOI: 10.1139/cjas-2021-0065
       
  • Are muscle fiber types different between normal and dark-cutting beef'

    • Free pre-print version: Loading...

      Authors: Bimol C. Roy, Shahid Mahmood, Heather L. Bruce
      Pages: 1 - 15
      Abstract: Canadian Journal of Animal Science, Ahead of Print.
      Muscle fiber (MF) characteristics of longissimus thoracis (LT) muscles from heifer (n = 11) and steer (n = 12) carcasses graded Canada AA (AA, normal, n = 4 per sex) or dark-cutting (Canada B4) were examined and related to beef quality. Atypical (AB4, pH  5.9, n = 3 and 4 for heifers and steers, respectively) dark-cutting carcasses were represented. Muscle fiber type proportions did not differ between AA, AB4, and TB4 muscles, although type I and IIB muscle fiber diameters were greater in TB4 than in AA LT. That AB4 muscle fiber proportions were not different from AA and TB4 muscles suggests that the increased MF diameter of TB4 muscle was due to water retained by muscle proteins at high ultimate pH, as evidenced by decreased cooking loss. Dark-cutting was therefore unrelated to muscle fiber proportions, and increased type I and IIB diameters in dark cutting LT were likely driven by elevated intramuscular ultimate pH.
      Citation: Canadian Journal of Animal Science
      PubDate: 2022-01-11T08:00:00Z
      DOI: 10.1139/cjas-2021-0085
       
 
JournalTOCs
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Email: journaltocs@hw.ac.uk
Tel: +00 44 (0)131 4513762
 


Your IP address: 3.238.204.167
 
Home (Search)
API
About JournalTOCs
News (blog, publications)
JournalTOCs on Twitter   JournalTOCs on Facebook

JournalTOCs © 2009-