Subjects -> AGRICULTURE (Total: 1076 journals)
    - AGRICULTURAL ECONOMICS (93 journals)
    - AGRICULTURE (766 journals)
    - CROP PRODUCTION AND SOIL (127 journals)
    - DAIRYING AND DAIRY PRODUCTS (32 journals)
    - POULTRY AND LIVESTOCK (58 journals)

POULTRY AND LIVESTOCK (58 journals)

Showing 1 - 58 of 58 Journals sorted alphabetically
Acta Agriculturae Scandinavica, Section A - Animal Sciences     Hybrid Journal   (Followers: 12)
Acta Scientiarum. Animal Sciences     Open Access   (Followers: 5)
Advances in Animal Biosciences     Full-text available via subscription   (Followers: 15)
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: 10)
Animal Cells and Systems     Hybrid Journal   (Followers: 7)
Animal Frontiers     Hybrid Journal   (Followers: 3)
Animal Nutrition     Open Access   (Followers: 26)
Animal Production     Open Access   (Followers: 6)
Animal Production Science     Hybrid Journal   (Followers: 4)
Animal Reproduction Science     Hybrid Journal   (Followers: 8)
Animal Research International     Full-text available via subscription   (Followers: 8)
Animal Science Journal     Hybrid Journal   (Followers: 8)
Applied Animal Science     Hybrid Journal   (Followers: 1)
Archiva Zootehnica     Open Access  
Archives Animal Breeding     Open Access   (Followers: 4)
Archives of Animal Nutrition     Hybrid Journal   (Followers: 9)
Asian-Australasian Journal of Animal Sciences     Open Access  
Bangladesh Journal of Animal Science     Open Access   (Followers: 3)
Boletim de Indústria Animal     Open Access  
Bulletin of Animal Health and Production in Africa     Full-text available via subscription   (Followers: 3)
Canadian Journal of Animal Science     Hybrid Journal   (Followers: 10)
Indian Journal of Animal Sciences     Open Access   (Followers: 5)
Indonesian Journal of Animal and Veterinary Sciences     Open Access   (Followers: 2)
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: 6)
Journal of Animal Science     Hybrid Journal   (Followers: 17)
Journal of Animal Science and Biotechnology     Open Access   (Followers: 7)
Journal of Animal Science and Products     Open Access   (Followers: 6)
Journal of Animal Science and Technology     Open Access   (Followers: 3)
Journal of Applied Animal Nutrition     Open Access   (Followers: 4)
Journal of Applied Animal Welfare Science     Hybrid Journal   (Followers: 25)
Journal of Applied Poultry Research     Open Access   (Followers: 5)
Journal of Livestock Science and Technologies     Open Access   (Followers: 1)
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  
Jurnal Sain Peternakan Indonesia     Open Access   (Followers: 1)
La Chèvre     Full-text available via subscription  
Meat and Muscle Biology     Open Access  
Media Peternakan     Open Access  
Nigerian Journal of Animal Science     Full-text available via subscription   (Followers: 1)
Nutrición Animal Tropical     Open Access   (Followers: 3)
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     Open Access   (Followers: 7)
Poultry Science Journal     Open Access   (Followers: 3)
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)
Tropical Animal Health and Production     Open Access   (Followers: 1)
University of Sindh Journal of Animal Sciences     Open Access  
Veeplaas     Full-text available via subscription  
World Rabbit Science     Open Access  
Similar Journals
Journal Cover
Canadian Journal of Animal Science
Journal Prestige (SJR): 0.403
Citation Impact (citeScore): 1
Number of Followers: 10  
 
  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]
  • 2020 Canadian Society of Animal Science Award Recipients
    • Authors: Filippo Miglior, Dan Columbus
      Abstract: Canadian Journal of Animal Science, Volume 100, Issue 3, Page iii-v, September 2020.

      Citation: Canadian Journal of Animal Science
      PubDate: 2020-07-23T07:00:00Z
      DOI: 10.1139/cjas-2020-0108
      Issue No: Vol. 100, No. 3 (2020)
       
  • Impacts of feeding monensin sodium on production and the efficiency of
           milk production in dairy cows fed total mixed rations: evaluation of a
           confounded literature
    • Authors: P.H. Robinson
      Pages: 391 - 401
      Abstract: Canadian Journal of Animal Science, Volume 100, Issue 3, Page 391-401, September 2020.
      The amount of milk Canadian dairy farmers produce is limited to a production quota expressed in milk fat. Because milk economic value is primarily based on fat and protein, it can be advantageous to decrease the milk fat to protein ratio. Monensin sodium has been suggested to reduce milk fat proportion and outputs, but not milk protein. Publications using lactating dairy cows were utilized to assess predictability of production responses to monensin feeding based upon their base production characteristics and diet composition. Predicted animal output changes due to monensin had poor fits with low r2 (0.31–0.44) and unevenly distributed residuals. Further assessment revealed that cow characteristics, and diets, were not independent of monensin feeding level. Thus, the 43 comparisons were clustered into levels of 10–12, 14–18, or 20–24 mg kg−1 of diet dry matter (DM). Milk fat yield reductions due to monensin differed (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2020-07-17T07:00:00Z
      DOI: 10.1139/cjas-2019-0184
      Issue No: Vol. 100, No. 3 (2020)
       
  • Rearing and handling injuries in broiler chickens and risk factors for
           wing injuries during loading
    • Authors: Michael S. Cockram, Ketan Jung Dulal, Henrik Stryhn, Crawford W. Revie
      Pages: 402 - 410
      Abstract: Canadian Journal of Animal Science, Volume 100, Issue 3, Page 402-410, September 2020.
      Some injuries to broilers occur during rearing, but most injuries occur during handling before slaughter. Records provided by a processing plant for loads transported over a 19 mo period during 2009 and 2010 were examined. The median percentage of wing injuries per load was 5.7%, whereas injuries to the legs, breast, or shoulders were all less than 1% per load. Risk factors for wing injuries were examined by considering the data from each load by handling event (i.e., loads originating from the same producer on the same date). A multilevel model with three levels, producer (n = 86), handling event (n = 1694), and load (n = 4219), was fitted. The final model included weight, sex, season, catching team, time of day at which loading began, speed of loading, and an interaction between speed of loading and time of day. Factors that reduced the risk of wing injuries were loading lighter birds, loads containing only cockerels, and loading in the fall. The predicted percentage of wing injuries was relatively constant for slower loading speeds, but it was increased significantly when faster loading speeds were adopted during daytime (0700–1700). Identification of these risk factors can be used to adjust loading practices.
      Citation: Canadian Journal of Animal Science
      PubDate: 2020-02-13T08:00:00Z
      DOI: 10.1139/cjas-2019-0204
      Issue No: Vol. 100, No. 3 (2020)
       
  • Effects of dietary Bacillus subtilis RX7 and B2A supplementation on
           productive performance, egg quality, blood profiles, and excreta
           Salmonella counts in laying hens
    • Authors: Huan Shi, Wan Lin Zhang, In Ho Kim
      Pages: 411 - 417
      Abstract: Canadian Journal of Animal Science, Volume 100, Issue 3, Page 411-417, September 2020.
      An experiment was carried out to investigate the effect of Bacillus subtilis RX7 and B2A supplementation on egg production, egg quality, blood profile, and excreta Salmonella population in laying hens. A total of 192 Hy-Line Brown laying hens (40-wk-old) were randomly assigned into four dietary treatments, each of which was replicated eight times with six hens per replicate in a 5 wk trial. The dietary treatments were NC, which is a basal diet without antibiotics or Bacillus subtilis; PC, which is an NC + 0.5 g kg−1 antibiotic (virginiamycin) diet; BSR, which is an NC + 0.5 g kg−1 Bacillus subtilis RX7 (1.0 × 109 colony forming units g−1); and BSB, which is an NC + 0.5 g kg−1 Bacillus subtilis B2A (1.0 × 109 colony forming units g−1). The results showed that hens receiving BSB diets had increased (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2020-02-22T08:00:00Z
      DOI: 10.1139/cjas-2019-0064
      Issue No: Vol. 100, No. 3 (2020)
       
  • Differences in melanin type and content among color variations in American
           mink (Neovison vison)
    • Authors: Dominika Grabolus, Patrycja Wacławik, Magdalena Zatoń-Dobrowolska
      Pages: 418 - 425
      Abstract: Canadian Journal of Animal Science, Volume 100, Issue 3, Page 418-425, September 2020.
      Coat colour is one of the most important qualitative traits of fur animals. Determining melanin pigments forming the basics of visible coat colour may contribute to a better understanding of the process of creating different coat colour variations in fur-bearing animals. This study aimed to (i) isolate pigment cells from the hair of American mink of 11 colour variations (standard brown, silverblue, palomino, black, wild type, sapphire, black cross, pearl, palomino cross, glow, and amber) using acid and alkali; and (ii) characterise the melanin pigments obtained. The purified pigment cells were observed under a light microscope and verified by spectrophotometry scanning and nuclear magnetic resonance spectroscopy. The method allowed for obtaining pure melanin specimens. Using acid and alkali to extract eumelanosomes did not affect their shape and structure; it also allowed for obtaining pheomelanin from the hair. The results have proven that the hair colour of the American mink is based on all types of melanin, and that its variations differ in terms of how much eumelanin and pheomelanin the hair contains.
      Citation: Canadian Journal of Animal Science
      PubDate: 2020-02-28T08:00:00Z
      DOI: 10.1139/cjas-2019-0196
      Issue No: Vol. 100, No. 3 (2020)
       
  • Mutation c.307G>A in FUT1 gene has no effect on production performance of
           Yorkshire pigs in the tropics: the case of Vietnam
    • Authors: Do Duc Luc, Nguyen Hoang Thinh, Ha Xuan Bo, Nguyen Thi Vinh, Tran Xuan Manh, Nguyen Van Hung, Vu Dinh Ton, Frédéric Farnir
      Pages: 426 - 431
      Abstract: Canadian Journal of Animal Science, Volume 100, Issue 3, Page 426-431, September 2020.
      The alpha (1) fucosyltransferase gene (FUT1) is a candidate gene for controlling the adhesion of Escherichia coli F18 receptor. Indeed, a single-nucleotide polymorphism, c.307G>A, located in the gene is such that pigs with AA genotype are resistant to entero-toxigenic E. coli F18, whereas those with AG and GG genotypes are sensitive. An experiment was carried out in northern Vietnam from March 2016 to May 2017 to determine FUT1 genotype frequencies and the effect of these genotypes on production performance of Yorkshire pigs. A total of 613 animals were genotyped using polymerase chain reaction – restriction fragment length polymorphism method. The body weights at birth, weaning, initial fattening period, and final fattening period were collected from 611, 516, 479, and 418 animals, respectively, whereas backfat thickness, depth of longissimus dorsi, and lean meat percentage were recorded from 328 animals. The frequencies of FUT1 genotypes were found to be in Hardy–Weinberg equilibrium (P = 0.51). Effect of FUT1 genotype was not observed for all production traits (P > 0.05), whereas final body weight and depth of longissimus dorsi were significantly different between females and males (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2020-03-12T07:00:00Z
      DOI: 10.1139/cjas-2019-0084
      Issue No: Vol. 100, No. 3 (2020)
       
  • Changes in expression of prostaglandin synthase in ovine liver during
           early pregnancy
    • Authors: Ling Yang, Xu Han, Leying Zhang, Ning Li, Zimo Zhao, Jiachen Bai
      Pages: 432 - 439
      Abstract: Canadian Journal of Animal Science, Volume 100, Issue 3, Page 432-439, September 2020.
      Liver can function as part of the innate and adaptive immune systems. We hypothesize that prostaglandins participate in the regulation of hepatic immune function during early pregnancy in sheep. The objective of this study was to elucidate expression of prostaglandin synthase in ovine liver during early pregnancy. Ovine livers were sampled on day 16 of the estrous cycle, and days 13, 16, and 25 of pregnancy, and the expression of prostaglandin synthases, including prostaglandin-endoperoxide synthase 1 (PTGS1), PTGS2, prostaglandin E synthase (PTGES), and aldo-keto reductase family 1, member B1, a prostaglandin F synthase (PGFS), were detected by quantitative real-time polymerase chain reaction, Western blot, and immunohistochemistry analysis. There were increases in the expression of mRNA and the proteins of PTGS2, PTGES, and PGFS in the livers during early pregnancy, but PTGS1 was decreased in the pregnant ewes. The PGFS protein was limited to the hepatocytes and the endothelial cells of the proper hepatic arteries and hepatic portal veins. In summary, the upregulation of PTGS2, PTGES, and PGFS and downregulation of PTGS1 may be involved in the maternal hepatic immune adjustment during early pregnancy in sheep.
      Citation: Canadian Journal of Animal Science
      PubDate: 2020-03-12T07:00:00Z
      DOI: 10.1139/cjas-2019-0171
      Issue No: Vol. 100, No. 3 (2020)
       
  • Influence of collagen changes on the tenderness of yak rumen smooth muscle
           during storage
    • Authors: Mingyi Yan, Shengsheng Li
      Pages: 440 - 446
      Abstract: Canadian Journal of Animal Science, Volume 100, Issue 3, Page 440-446, September 2020.
      The aim of the present study was to investigate the influence of collagen changes on the tenderness of yak rumen smooth muscle during storage. Yak rumen smooth muscle was stored at 3 ± 1 °C for 7 d and the Warner–Bratzler shear force (WBSF); total, soluble, and insoluble collagen content (TCC, SCC); collagen solubility (CS); and histological structure were monitored. Label-free mass spectrometry was used to validate the changes in collagen. Collagen changes significantly influenced yak rumen smooth muscle tenderness. A significant positive relationship was found between WBSF and TCC, SCC, as well as CS. The label-free mass spectrometry results validated that the collagen of smooth muscle was degraded during storage. Histological analysis revealed that yak rumen smooth muscle structure was destroyed during storage. Smooth muscle underwent a similar change in tenderness as skeletal muscle, and the weakening of connective tissue was the main reason for smooth muscle tenderness development.
      Citation: Canadian Journal of Animal Science
      PubDate: 2020-03-12T07:00:00Z
      DOI: 10.1139/cjas-2019-0067
      Issue No: Vol. 100, No. 3 (2020)
       
  • Standardized ileal digestibility of amino acids and apparent metabolizable
           energy in corn and soybean meal for organic broiler chicken production in
           Ontario
    • Authors: Haley Leung, Elijah G. Kiarie
      Pages: 447 - 454
      Abstract: Canadian Journal of Animal Science, Volume 100, Issue 3, Page 447-454, September 2020.
      Standardized ileal digestibility (SID) of amino acids (AA) and apparent metabolizable energy corrected for nitrogen (AMEn) in samples of organic corn and soybean meal (SBM) were determined. Conventional corn (CC) and SBM (CSBM) samples were tested for comparison. A total of 560, fourteen-day-old male broiler chickens (Cobb 500) were weighed, placed in cages (10 birds per cage), and allocated to seven (n = 8) semi-purified wheat-starch-based diets. Diets were (1) CC, (2) imported organic corn, (3) local organic corn, (4) CSBM, (5) imported organic SBM (OSBMI), (6) local organic SBM (OSBML), and (7) nitrogen-free wheat starch. Only few differences were observed on SID of AA; SID of lysine was lower (P = 0.002) in organic corn samples relative to CC, and SID of methionine was lower (P = 0.002) in OSBML sample relative to CSBM and OSBMI samples. The AMEn of CC was higher (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2020-01-09T08:00:00Z
      DOI: 10.1139/cjas-2019-0166
      Issue No: Vol. 100, No. 3 (2020)
       
  • Study on CHADL as a candidate gene for comb growth traits in Partridge
           Shank roosters
    • Authors: Yifan Liu, Yunjie Tu, Ming Zhang, Jianmin Zou, Gaige Ji, Yanju Shan, Xiaojun Ju, Jingting Shu
      Pages: 455 - 461
      Abstract: Canadian Journal of Animal Science, Volume 100, Issue 3, Page 455-461, September 2020.
      The comb is an important secondary sexual characteristic and comb growth traits, such as size and color of the comb, are widely used as indicators in chicken breeding programs. However, the genetic basis for these traits remains mostly unknown. It was found that the chondroadherin-like (CHADL) gene was up-regulated in large combs and was located in reported comb growth quantitative trait loci. In this study, tissue-specific expressions, expression patterns in combs of different ages, and CHADL polymorphisms were analyzed to investigate the relationship between this gene and comb growth traits of Partridge Shank roosters. The results showed that CHADL was more highly expressed in combs than in 10 other tissues, and its expressions in combs tended to gradually increase from the 5-wk-old mark to the 26-wk-old mark. The single-nucleotide polymorphism rs316423539 in the CHADL gene was significantly associated with the comb area and height, whereas rs14822286 was highly correlated with the comb color. Moreover, H1H5, H1H6, and H3H6 were the most advantageous genotype combinations for comb growth traits. Our results might help understand the molecular mechanism of comb growth traits and improve these traits directly by marker assistant selections.
      Citation: Canadian Journal of Animal Science
      PubDate: 2020-01-18T08:00:00Z
      DOI: 10.1139/cjas-2018-0243
      Issue No: Vol. 100, No. 3 (2020)
       
  • Effects of dietary Korean garlic extract aged by Leuconostoc mesenteroides
           KCCM35046 on growth performance, digestibility, blood profiles, gas
           emissions, and microbiota in weanling pigs
    • Authors: J.H. Cho, S.D. Liu, I.H. Kim
      Pages: 462 - 469
      Abstract: Canadian Journal of Animal Science, Volume 100, Issue 3, Page 462-469, September 2020.
      A total of 150 crossbred pigs [(Duroc × Yorkshire) × Landrace; body weight (BW) = 5.74 ± 1.15 kg; weaned at day 21 after birth] were assigned to one of five dietary treatments (six pens per treatment and five pigs per pen) by BW and sex (two barrows and three gilts) for a 6 wk experiment. The pen was considered the experimental unit in the statistical model. Treatments were corn–soybean meal diets supplemented with 0.0033% tiamulin as well as 0%, 0.05%, 0.10%, or 0.20% fermented garlic (FG). The average daily gain, average daily feed intake (ADFI), and feed conversion ratio were linearly (p 
      Citation: Canadian Journal of Animal Science
      PubDate: 2020-01-29T08:00:00Z
      DOI: 10.1139/cjas-2019-0111
      Issue No: Vol. 100, No. 3 (2020)
       
  • Growth performance, carcass characteristics, and meat quality of Mongolian
           lambs fed native grass or hay with or without concentrate on the Inner
           Mongolian Plateau
    • Authors: Shuai Du, Sihan You, Jian Bao, Gentu Ge, Yushan Jia, Yimin Cai
      Pages: 470 - 478
      Abstract: Canadian Journal of Animal Science, Volume 100, Issue 3, Page 470-478, September 2020.
      The aim of this study was to evaluate the effects of native grass on growth performance, carcass characteristics, and meat quality of Mongolian lambs fed Inner Mongolia native grass in three forms: grass, hay, and hay with concentrate (HC). Sixty Mongolian noncastrated male lambs, in good health and with the same age (6 mo) and similar body weights (mean, 28.63 ± 0.19 kg), were randomly divided into three treatments. There were four replicates in each treatment, with five lambs in one pen as a replicate. Compared with the HC group, the intake of the grass group was higher (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2020-01-29T08:00:00Z
      DOI: 10.1139/cjas-2019-0126
      Issue No: Vol. 100, No. 3 (2020)
       
  • Heterozygosity of the Celtic polled locus in Canadian scurred beef cattle
    • Authors: Crystal Ketel, Mika Asai-Coakwell
      Pages: 479 - 484
      Abstract: Canadian Journal of Animal Science, Volume 100, Issue 3, Page 479-484, September 2020.
      Polled cattle are preferable to horned or scurred animals because they are safer for handling and cause less bruising. Although DNA testing can determine horned/polled genotype, scurs may appear in polled animals. The inheritance of scurs is complex because it is a sex-influenced trait that interacts with the polled locus. We demonstrate that in 685 purebred and crossbred Canadian beef cattle, all 153 scurred animals were heterozygous polled at the Celtic variant. In addition, male obligate carriers of scurs were smooth polled when homozygous for the polled mutation. Scurred and non-scurred males were sequenced for five genes (CTDNEP1, SHBG, SOX15, FGF11, and DHRS7C) within the scur candidate region on BTA19 that are functionally related to bone development and hormone regulation. Multipoint linkage analysis was conducted using 18 microsatellite markers and two informative variants (DHRS7C g.29594018G>C and CTDNEP1 c.462G>A) in the scurred families and further supported mapping on BTA19 between BMS2142 (logarithm of the odds (LOD) = 5.42) and IDVGA46 (LOD = 3.47). These data indicate epistatic interactions between the scurred and polled loci and emphasise the necessity for a scurred DNA test to assist purebred beef producers in eradicating the scur trait.
      Citation: Canadian Journal of Animal Science
      PubDate: 2020-01-30T08:00:00Z
      DOI: 10.1139/cjas-2019-0095
      Issue No: Vol. 100, No. 3 (2020)
       
  • In vitro ruminal fermentation and methane inhibitory effect of three
           species of microalgae
    • Authors: Ali Kiani, Christina Wolf, Katrin Giller, Lukas Eggerschwiler, Michael Kreuzer, Angela Schwarm
      Pages: 485 - 493
      Abstract: Canadian Journal of Animal Science, Volume 100, Issue 3, Page 485-493, September 2020.
      In this study, in vitro ruminal fermentation, anti-methanogenesis, and ammonia formation of two autotrophic algae [Nannochloropsis gaditana (NG), Phaeodactylum tricornutum (PT)], and one heterotrophic alga [Schizochytrium sp. (SS)] were investigated. The experimental diets consisted of a hay-concentrate basal diet (BD; 200 mg dry matter) supplemented with (1) no algae (just BD), (2) 40 mg of dried NG (BD + NG), (3) 40 mg of dried PT (BD + PT), and (4) 14 mg of dried SS. In total, 48 samples (four algal treatments × two replicates × three runs × two cows) were incubated for 24 h using the Hohenheim gas test method. All three algae decreased (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2020-08-19T07:00:00Z
      DOI: 10.1139/cjas-2019-0187
      Issue No: Vol. 100, No. 3 (2020)
       
  • The improving effects of biotin on hepatic histopathology and related
           apolipoprotein mRNA expression in laying hens with fatty liver hemorrhagic
           syndrome
    • Authors: Jiamei Huang, Guyue Li, Hongfeng Cao, Fei Yang, Chenghong Xing, Yu Zhuang, Caiying Zhang, Ping Liu, Huabin Cao, Guoliang Hu
      Pages: 494 - 501
      Abstract: Canadian Journal of Animal Science, Volume 100, Issue 3, Page 494-501, September 2020.
      Fatty liver hemorrhagic syndrome (FLHS) is a metabolic disease mostly observed in laying hens that causes an economic toll on the poultry industry. To investigate the improving effects of biotin on FLHS in laying hens, a total of 135 Hy-Line Brown layers of 300-d-old were randomly divided into three groups and treated for 60 d. The hens from these three groups were fed with different diets: control group (the basal diet), pathology group [high-energy-low-protein diet (HELP)], and treatment group (HELP containing a biotin dosage of 0.3 mg kg−1). The results showed that the mRNA expression level of apolipoprotein A I (apoA I) in pathology group significantly (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2020-02-13T08:00:00Z
      DOI: 10.1139/cjas-2019-0147
      Issue No: Vol. 100, No. 3 (2020)
       
  • Effectiveness of using a hybrid rye cultivar in feeding broiler chickens
    • Authors: Anna Milczarek, Maria Osek, Alicja Skrzypek
      Pages: 502 - 509
      Abstract: Canadian Journal of Animal Science, Volume 100, Issue 3, Page 502-509, September 2020.
      The aim of this research was to evaluate the effectiveness of the use of hybrid rye in rations for broiler chickens. The study covered 160 chickens split into four equal groups [I (control), II, III, IV] and kept for 42 d. Rye was introduced into the above-mentioned diets as a partial substitute for maize in the following quantities: (I), no rye; (II), 5% rye in starter feed and 10% rye in grower and finisher feed; (III), 10% rye in starter feed and 20% rye in grower and finisher feed; (IV), 15% rye in starter feed and 30% rye in grower and finisher feed. During the 42 d rearing period, the most favourable body weight gain (P ≤ 0.05) and feed conversion ratio (P ≤ 0.01) were observed in chickens fed with rations containing the highest share of hybrid rye (group IV). The rye did not affect the dressing percentage and muscularity but diversified the fatness of birds. The muscles of chickens from group IV showed higher (P ≤ 0.01) red saturation and lower (P ≤ 0.01) yellow saturation and hue compared with the muscle of birds receiving diets with the lowest rye content (group I). The results of the study show that the inclusion of hybrid rye can be recommended in broiler chicken diets at a share of 15% in starter feed and 30% in grower and finisher feed, respectively.
      Citation: Canadian Journal of Animal Science
      PubDate: 2020-06-08T07:00:00Z
      DOI: 10.1139/cjas-2019-0132
      Issue No: Vol. 100, No. 3 (2020)
       
  • Effects of dietary mulberry leaf powder on growth performance, blood
           metabolites, meat quality, and antioxidant enzyme-related gene expression
           of fattening Hu lambs
    • Authors: Jialiang Ouyang, Qirui Hou, Mengzhi Wang, Weiguo Zhao, Dan Feng, Yu Pi, Xuezhao Sun
      Pages: 510 - 521
      Abstract: Canadian Journal of Animal Science, Volume 100, Issue 3, Page 510-521, September 2020.
      This study was conducted to investigate the effects of the mulberry [Morus alba var. multicaulis (Perrott.) Loud.] leaf powder (MLP) supplementation in dietary concentrates on growth performance, blood metabolites, meat quality, and antioxidant enzyme (AOE) gene expression in fattening Hu lambs. Forty approximately 3-mo-old Hu lambs (16.5 ± 0.6 kg) were randomly allocated to five groups and fed with concentrates containing 0%, 15%, 30%, 45%, or 60% MLP (control, T15, T30, T45, and T60, respectively). The results showed that 15%–30% MLP supplementation maintained growth and carcass performance, and the weight of total stomach, especially of rumen in T15 and T30, were higher than those of the control. Dietary MLP supplementation decreased serum aspartate aminotransferase, alanine aminotransferase, lactate dehydrogenase, cholesterol, and triglyceride levels, but increased the high-density lipoprotein levels. Moreover, MLP supplementation improved the longissimus lumborum muscle color (redness), tenderness, and water-holding capacity. It was further observed that 15% MLP supplementation enhanced all AOE mRNA levels apart from that of EPHX1. In summary, dietary MLP supplementation could partially improve the blood metabolites, meat quality, and AOE mRNA levels in the liver of fattening Hu lamb, and the level of 15% supplementation was the most promising.
      Citation: Canadian Journal of Animal Science
      PubDate: 2020-02-21T08:00:00Z
      DOI: 10.1139/cjas-2019-0119
      Issue No: Vol. 100, No. 3 (2020)
       
  • Methane and carbon dioxide emissions from yearling beef heifers and mature
           cows classified for residual feed intake under drylot conditions
    • Authors: G. Manafiazar, V.S. Baron, L. McKeown, H. Block, K. Ominski, G. Plastow, J.A. Basarab
      Pages: 522 - 535
      Abstract: Canadian Journal of Animal Science, Volume 100, Issue 3, Page 522-535, September 2020.
      This study quantified methane (CH4) and carbon dioxide (CO2) production from beef heifers and cows classified for residual feed intake adjusted for off-test backfat thickness (RFIfat) and reared in drylot during cold winter temperatures. Individual performance, daily feed intake, and RFIfat were obtained for 1068 crossbred and purebred yearling heifers (eight trials) as well as 176 crossbred mature cows (six trials) during the winters of 2015–2017 at two locations. A portion of these heifers (147 high RFIfat; 167 low RFIfat) and cows (69 high RFIfat; 70 low RFIfat) was monitored for enteric CH4 and CO2 emissions using the GreenFeed Emissions Monitoring (GEM) system (C-Lock Inc., Rapid City, SD, USA). Low RFIfat cattle consumed less feed [heifers, 7.80 vs. 8.48 kg dry matter (DM) d−1; cows, 11.64 vs. 13.16 kg DM d−1] and emitted less daily CH4 (2.5% for heifers; 3.7% for cows) and CO2 (1.4% for heifers; 3.4% for cows) compared with high RFIfat cattle. However, low RFIfat heifers and cows had higher CH4 (6.2% for heifers; 9.9% for cows) and CO2 yield (7.3% for heifers; 9.8% for cows) per kilogram DM intake compared with their high RFIfat pen mates. The GEM system performed at air temperatures between +20 and −30 °C. Feed intake of heifers and mature cows was differently affected by ambient temperature reduction between +20 and −15 °C and similarly increased their feed intake at temperatures below −15 °C. In conclusion, low RFIfat animals emit less daily enteric CH4 and CO2, due mainly to lower feed consumption at equal body weight, gain, and fatness.
      Citation: Canadian Journal of Animal Science
      PubDate: 2020-03-24T07:00:00Z
      DOI: 10.1139/cjas-2019-0032
      Issue No: Vol. 100, No. 3 (2020)
       
  • Molecular cloning, sequence characteristics, and tissue expression
           analysis of glucagon receptor gene in Bama minipig
    • Authors: Cuiping An, Kaiyi Zhang, Wenjuan Zhu, Yanzhen Bi, Tianwen Wu, Cong Tao, Yanfang Wang, Shulin Yang
      Pages: 536 - 546
      Abstract: Canadian Journal of Animal Science, Volume 100, Issue 3, Page 536-546, September 2020.
      Recent studies have shown that the glucagon receptor (GCGR) plays an important role in the development of type 2 diabetes mellitus. Both pigs and humans exhibit significantly similar behaviors in their glucose and lipid metabolism. In this study, the obtained Bama minipig GCGR coding sequence was 1437 bp encoding 479 amino acids (AA), which demonstrated higher sequence homology with humans than other species. It showed the highest expression profile in the liver, followed by the lung and kidney. In addition, the three-dimensional structure analysis showed that the porcine GCGR protein also had a classic sevenfold transmembrane region and a stalk region at the N-terminus for ligand binding. The stalk region of GCGR possessed five AA variations. The ligand binding pocket of GCGR has one AA variation in the key region, none of which affected the glucagon binding verified by the crystal structure mutagenesis in humans. There was no variation found in the region of membrane anchoring, hydrophobic bond, salt bridge, and hydrogen bond. However, the Gly40Ser mutation in mice resulted in major diseases, meaning that pigs are more suitable for the evaluation of GCGR-related drugs than mice.
      Citation: Canadian Journal of Animal Science
      PubDate: 2020-03-24T07:00:00Z
      DOI: 10.1139/cjas-2019-0124
      Issue No: Vol. 100, No. 3 (2020)
       
  • Effects of dietary kelp (Ascophylum nodosum) supplementation on survival
           rate and reproductive performance of mink challenged with Aleutian mink
           disease virus
    • Authors: A. Hossain Farid, Nancy J. Smith, Margot B. White
      Pages: 547 - 556
      Abstract: Canadian Journal of Animal Science, Volume 100, Issue 3, Page 547-556, September 2020.
      Infection with Aleutian mink disease virus (AMDV) has negative effects on reproductive performance and survival rate of American mink (Neovison vison). The objectives of this study were to assess the effects of kelp (Ascophylum nodosum) supplementation on survival, growth rate, and reproductive performance of mink challenged with AMDV. AMDV-free female black mink (n = 75) were intranasally inoculated with a local AMDV strain. Mink were fed a commercial pellet supplemented with 1.5% or 0.75% kelp or were kept as controls (received no kelp) for 451 d. Body weight and rectal temperature were recorded on days 0, 31, 56, 99, 155, 366, and 451 post inoculation (PI). Annual mortality rates were 13.6%, 20.0%, and 31.8% for mink fed 1.5%, 0.75%, or 0.0% kelp, respectively (P = 0.29). Mink which were fed 1.5% kelp had a significantly (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2020-06-04T07:00:00Z
      DOI: 10.1139/cjas-2019-0221
      Issue No: Vol. 100, No. 3 (2020)
       
  • Benefit-cost analysis of near-infrared spectroscopy technology adoption by
           Alberta hog producers
    • Authors: Bijon A. Brown, Henry An, Scott R. Jeffrey
      Pages: 557 - 569
      Abstract: Canadian Journal of Animal Science, Volume 100, Issue 3, Page 557-569, September 2020.
      Feed cost is a significant component of livestock production costs, accounting for over half of total operating costs for hog producers. This provides an incentive to minimize feed costs while meeting dietary requirements. However, producers may not know the nutritional content of their feed grains with certainty. Near-infrared reflectance spectroscopy (NIRS) imaging technology can quickly and accurately estimate the nutritional content of different types of feed grain. Although the technology has been available for almost five decades, producer adoption has been slow due to issues with cost and usability. The objectives of this study are to estimate feed cost savings resulting from the adoption of NIRS on a representative Alberta hog farm and to conduct a benefit-cost analysis to investigate the potential viability of NIRS adoption. A joint mathematical programming-simulation approach is used to estimate the cost savings generated by adoption of NIRS technology. Results suggest mean annual savings of up to $4 per hog and benefit-cost results suggest that adopting NIRS technology may be viable, particularly for larger Alberta hog operations. However, initial investment requirements, uncertainty in the magnitude of benefits, and access to the technology from feed mills will likely continue to limit adoption.
      Citation: Canadian Journal of Animal Science
      PubDate: 2020-03-25T07:00:00Z
      DOI: 10.1139/cjas-2019-0144
      Issue No: Vol. 100, No. 3 (2020)
       
  • Red blood cells are superior to plasma for predicting subcutaneous trans
           fatty acid composition in beef heifers
    • Authors: P. Vahmani, D.C. Rolland, H.C. Block, M.E.R. Dugan
      Pages: 570 - 576
      Abstract: Canadian Journal of Animal Science, Volume 100, Issue 3, Page 570-576, September 2020.
      The trans (t)-18:1 content in beef has become more of interest as partially hydrogenated vegetable oils are removed from foods. Predicting t-18:1 early in the feeding period would be useful if limitations are put on t-18:1 in beef. To determine which blood component is better related to backfat, proportions of t10-18:1 and t11-18:1 (vaccenic acid) were measured in heifer red blood cells (RBC) and plasma (N = 14) after 0, 28, 56, and 76 d on a barley-grain-based diet, and correlated with post-slaughter subcutaneous fat (SCF). Total t-18:1 declined in both RBC and plasma during late finishing (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2020-03-25T07:00:00Z
      DOI: 10.1139/cjas-2019-0164
      Issue No: Vol. 100, No. 3 (2020)
       
  • Effect of dietary inclusion of antioxidants and organic trace minerals on
           growth performance, carcass characteristics, and meat quality of finishing
           pigs with pre-slaughter transportation
    • Authors: Chong Wang, Junhong Wang, Sirui Qi, Cunzhu Xu, Yanming Wang, Haifeng Wang
      Pages: 577 - 585
      Abstract: Canadian Journal of Animal Science, Volume 100, Issue 3, Page 577-585, September 2020.
      A total of 320 pigs (body weight = 98 ± 4 kg) were assigned to four treatments, with eight replicates (pens) per treatment. Pigs were fed the following diets: a control diet (CON), the CON diet plus antioxidant blends (AOX), organic trace minerals (OTM), or both (AOX + OTM). After the feeding trial, two pigs from each pen were selected for slaughtering right away or after transportation. The inclusion of AOX, OTM, or AOX + OTM had no significant effect on feed intake, average daily gain, and feed efficiency compared with CON (P > 0.05). The pre-transportation significantly reduced the pH value of loin meat at 24 h post mortem and leg meat at 45 min post mortem (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2020-04-14T07:00:00Z
      DOI: 10.1139/cjas-2019-0177
      Issue No: Vol. 100, No. 3 (2020)
       
  • Correction: Productive performance of lambs fed with high-moisture
           triticale grain ensiled with different additives
    • Authors: Valter Harry Bumbieris Junior, Vinícius André de Pietro Guimarães, Edson Luis de Azambuja Ribeiro, Leandro das Dores Ferreira da Silva, Clóves Cabreira Jobim, Ivone Yurika Mizubuti, Isabella Mayara Camilo, Fernando Augusto Grandis, Ediane Zanin
      Pages: 586 - 586
      Abstract: Canadian Journal of Animal Science, Volume 100, Issue 3, Page 586-586, September 2020.

      Citation: Canadian Journal of Animal Science
      PubDate: 2020-08-17T07:00:00Z
      DOI: 10.1139/cjas-2020-0118
      Issue No: Vol. 100, No. 3 (2020)
       
  • Proceedings of the 2020 Meeting of the Animal Science Modelling Group
    • Authors: E. Kebreab, J.P. Cant, J.A. Metcalf
      Pages: 1 - 3
      Abstract: Canadian Journal of Animal Science, Ahead of Print.

      Citation: Canadian Journal of Animal Science
      PubDate: 2020-09-22T07:00:00Z
      DOI: 10.1139/cjas-2020-0114
       
  • Estimation du poids du fœtus zébu peulh à partir de mesures
           échographiques des paramètres fœtaux
    • Authors: A.T. Yamboué, M. Zongo, B. Traoré, O. Diallo, C. Hanzen
      Pages: 1 - 6
      Abstract: Canadian Journal of Animal Science, Ahead of Print.
      Cette étude vise à estimer le poids du fœtus zébu peulh à partir des mesures échographiques des diamètres de l’abdomen (DA), du bipariétal (DBP), du cordon ombilical (DCO), de la corne utérine (DCU) et des longueurs du fémur (LF), du tibia (LT), et du dos (LD). Elle a concerné soixante et un (n = 61) utérus gravides recueillis après abattage de femelles gestantes. Toutes les gestations étaient simples. Les examens ont été réalisés en bain d’eau au moyen d’une sonde convexe de 3,5 MHz. Les utérus ont été ensuite disséqués afin de rapporté le poids des fœtus au moyen d’une balance. Les données ont été analysées au moyen du système de régression curvilinéaire. Les formules d’estimation du poids à partir des paramètres biométriques ont été de type y = axb, où y est le poids (g), a et b_constantes, et x est le paramètre biomètrique (mm). Toutes les structures morphologiques étudiées ont présenté des corrélations positives et hautement significatives avec le poids du fœtus (p 
      Citation: Canadian Journal of Animal Science
      PubDate: 2020-06-24T07:00:00Z
      DOI: 10.1139/cjas-2020-0004
       
  • Variability in subcutaneous fat composition of Iberian pigs reared in
           free-range conditions in the southwest of the Iberian Peninsula
    • Authors: J.F. Tejeda, A. Hernández-Matamoros, J.M. García-Cascos, E. González
      Pages: 1 - 9
      Abstract: Canadian Journal of Animal Science, Ahead of Print.
      A total of 80 free-range Iberian pigs reared with acorns and grass in eight different free-range systems (n = 10) in the southwest of the Iberian Peninsula were used to determine the relationship between fatty acid, tocopherol, and neophytadiene subcutaneous fat composition. The pigs were fed extensively for 79.1 ± 9.5 d from 110.9 ± 11.9 kg live weight at the beginning of the final fattening phase to 175.0 ± 15.9 kg slaughtered weight. Quercus suber and Quercus rotundifolia acorns were characterised by a high content of C18:1n-9 (58.3 and 63.1%, respectively) and γ-tocopherol [43.7 and 43.0 mg kg−1 dry matter (DM), respectively], while grass exhibited a high content of C18:3n-3 (42.5%), α-tocopherol (366.5 mg kg−1 DM) and neophytadiene (136.2 relative area units). The C18:1n-9 (54.4%–57.7%) and γ-tocopherol (2.7–4.1 mg kg−1 DM) contents in subcutaneous fat from Iberian pigs differed (p 
      Citation: Canadian Journal of Animal Science
      PubDate: 2020-05-14T07:00:00Z
      DOI: 10.1139/cjas-2019-0191
       
  • Association analysis of GH1 and CRP loci polymorphisms with reproductive
           traits in native Pulawska gilts and sows
    • Authors: M. Babicz, M. Pastwa, A. Kozubska-Sobocińska, B. Danielak-Czech, E. Skrzypczak, K. Kropiwiec-Domańska
      Pages: 1 - 7
      Abstract: Canadian Journal of Animal Science, Ahead of Print.
      The objective of the study was to analyse the association of growth hormone (GH1) and C-reactive protein (CRP) loci polymorphisms with reproductive traits in native Pulawska gilts and sows. In the GH1 locus, two mutations were identified: one in the second intron [single-nucleotide polymorphism (SNP) = rs340429823 in.742C>T, MspI], and one in the second exon (SNP = rs340087546 c.566G>A, HaeII). In the CRP locus, two mutations were found in exon 2 (SNP = rs340175625, NM_213844.2: c.1271A>G, BstNI; and SNP = rs80928546, NM_213844.2: c.788C>T, HinfI). Analysis of sexual activity showed that intensity of external estrus signs differed significantly (P ≤ 0.05) and was the most manifested in gilts with the CT (GH1_MspI) genotype during the second estrus. In case of the CRP gene, statistically significant differences (P ≤ 0.05) were found in terms of the duration of farrowing. The longest farrowings were reported for the GG (CRP_HinfI) and the TT (CRP_BstNI) genotypes and the shortest for the AA (CRP_HinfI) and CC (CRP_BstNI). The most numerous first litters were produced by sows with the AA genotype (CRP_HinfI), with significant differences (P ≤ 0.05) between the AA and GG genotypes. In turn, the CC homozygotes (CRP_BstNI) differed significantly (P ≤ 0.05) in terms of the number of piglets born and reared to day 21 in the second litters compared to the other genotype groups.
      Citation: Canadian Journal of Animal Science
      PubDate: 2020-04-24T07:00:00Z
      DOI: 10.1139/cjas-2019-0087
       
  • Genetic mechanisms underlying feed utilization and implementation of
           genomic selection for improved feed efficiency in dairy cattle
    • Authors: Luiz F. Brito, Hinayah R. Oliveira, Kerry Houlahan, Pablo A.S. Fonseca, Stephanie Lam, Adrien M. Butty, Dave J. Seymour, Giovana Vargas, Tatiane C.S. Chud, Fabyano F. Silva, Christine F. Baes, Angela Cánovas, Filippo Miglior, Flavio S. Schenkel
      Pages: 1 - 18
      Abstract: Canadian Journal of Animal Science, Ahead of Print.
      The economic importance of genetically improving feed efficiency has been recognized by cattle producers worldwide. It has the potential to considerably reduce costs, minimize environmental impact, optimize land and resource use efficiency, and improve the overall cattle industry’s profitability. Feed efficiency is a genetically complex trait that can be described as units of product output (e.g., milk yield) per unit of feed input. The main objective of this review paper is to present an overview of the main genetic and physiological mechanisms underlying feed utilization in ruminants and the process towards implementation of genomic selection for feed efficiency in dairy cattle. In summary, feed efficiency can be improved via numerous metabolic pathways and biological mechanisms through genetic selection. Various studies have indicated that feed efficiency is heritable, and genomic selection can be successfully implemented in dairy cattle with a large enough training population. In this context, some organizations have worked collaboratively to do research and develop training populations for successful implementation of joint international genomic evaluations. The integration of “-omics” technologies, further investments in high-throughput phenotyping, and identification of novel indicator traits will also be paramount in maximizing the rates of genetic progress for feed efficiency in dairy cattle worldwide.
      Citation: Canadian Journal of Animal Science
      PubDate: 2020-04-24T07:00:00Z
      DOI: 10.1139/cjas-2019-0193
       
  • Effects of dietary silicate levels on growth performance, nutrient
           digestibility, fecal microflora, odorous gas emissions, blood
           characteristics, and foot and mouth disease antibodies in weaning to
           finishing pigs
    • Authors: Ji Hwan Lee, Won Yun, Han Jin Oh, Ji Seon An, Young Gwang Kim, Chang Gyu Lee, Jin Ho Cho
      Pages: 1 - 10
      Abstract: Canadian Journal of Animal Science, Ahead of Print.
      The goal of this study was to investigate effects of different levels of silicate supplementation in weaning to finishing pigs. A total of 96 piglets [(Landrace × Yorkshire) × Duroc] with initial body weight of 11.30 ± 0.02 kg were used for 16 wk (six replicate pens with four pigs per pen). Dietary treatment consisted of 0% (CON), 0.1% (T1), 0.5% (T2), and 1.0% (T3) silicate in the basal diet. Inclusion of 0.1% dietary silicate increased (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2020-04-24T07:00:00Z
      DOI: 10.1139/cjas-2019-0200
       
  • Evaluation of feeding periods of dietary conjugated linoleic acid
           supplementation on growth performance, nutrient digestibility, blood
           profiles, and meat quality in finishing pigs
    • Authors: X. Ao, H.N. Tran, I.H. Kim
      Pages: 1 - 7
      Abstract: Canadian Journal of Animal Science, Ahead of Print.
      This study was conducted to evaluate feeding periods of dietary conjugated linoleic acid (CLA) supplementation on growth performance, nutrient digestibility, blood profiles, and meat quality in finishing pigs. A total of 150 finishing pigs [(Yorkshire × Landrace) × Duroc] with an average body weight (BW) of 83.13 ± 1.91 kg were randomly allocated into one of three treatments (10 pens per treatment, five pigs per pen) based on their BW. Dietary treatments consisted of supplementing the basal diet with 1.0% CLA during 2, 3, and 4 wk prior to finishing. Pigs fed CLA diets 2 wk before finishing had a higher overall average daily gain (ADG) and gain-to-feed ratio (G/F) than those fed CLA diets 4 wk before finishing (P 
      Citation: Canadian Journal of Animal Science
      PubDate: 2020-04-15T07:00:00Z
      DOI: 10.1139/cjas-2019-0127
       
  • Cloning, phylogenetic analysis, and postnatal expression of oligopeptide
           transporter PepT1 in gastrointestinal tract of kid goats receiving
           supplemental feed or pasture
    • Authors: Tao Ran, Hengzhi Li, Yong Liu, Chuanshe Zhou, Zhixiong He, Zhiliang Tan, Wenzhu Yang, Karen A. Beauchemin
      Pages: 1 - 10
      Abstract: Canadian Journal of Animal Science, Ahead of Print.
      This study aimed to clone the cDNA of PepT1, an H+-dependent oligopeptide transporter, from kid goats and examine effects of physiological development (suckling, weaning, and post-weaning) of the animal and feeding system (supplemental feeding vs. grazing) on peptide transport capability. A 2395 bp cDNA sequence of pept1 (GenBank: MH308024) was cloned and phylogenetic analysis revealed a high homology and structure similarity with PepT1 of sheep and cattle. The pept1 was expressed throughout the gastrointestinal tract of kid goats immediately after birth and during development. Relative abundance of pept1 decreased in all segments except the middle-jejunum during suckling, whereas its expression in most segments of small intestine increased with age after weaning and remained stable thereafter. Middle-jejunum was the predominant expression site and probably the main peptide absorption site. Supplemental feeding enhanced pept1 expression because it increased protein intake compared with grazing. No feeding system × age interaction was observed in most segments; the expression was age related during suckling and diet related during weaning and post-weaning, indicating that feeding system and age had independent effects on pept1 expression. These results indicate that PepT1 plays an important role for protein nutrition in neonatal goats, and its expression can be affected by feeding system.
      Citation: Canadian Journal of Animal Science
      PubDate: 2020-04-14T07:00:00Z
      DOI: 10.1139/cjas-2019-0155
       
 
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