Egg ‐laying capacity of parent flock geese at different stocking densities
This article presents the results of studies aimed at establishing the optimal stocking density of purebred and hybrid geese of the parent flock, taking into account the indicators of their live weight and egg production. When conducting research, the stocking density of geese was established depending on the breed and shape. Different stocking densities of geese in groups were achieved due to their different numbers in groups: Kuban 1.2; 1.5; 1.8 birds/m2, large gray 0.9; 1.2; 1.5 birds/m2, hybrid bird 1.0; 1.3; 1.5 birds/m2. It was revealed on the basis of the analysis of the productive qualities of adult geese that the ...
Source: Animal Science Journal - April 13, 2023 Category: Zoology Authors: Danis Khaziev,
Rinat Gadiev,
Alfiya Gayfullina,
Vladimir Kosilov,
Marina Kazanina Tags: RESEARCH ARTICLE Source Type: research
Genome ‐wide detection of changes in allelic frequency in Landrace pigs selected for resistance to mycoplasma pneumonia of swine
AbstractClosed-pig line breeding could change the genetic structure at a genome-wide scale because of the selection in a pig breeding population. We investigated the changes in population structure among generations at a genome-wide scale and the selected loci across the genome by comparing the observed and expected allele frequency changes in mycoplasma pneumonia of swine (MPS)-selected pigs. Eight hundred and seventy-four Landrace pigs, selected for MPS resistance without reducing average daily gain over five generations, had 37,299 single nucleotide polymorphisms (SNPs) and were used for genomic analyses. Regarding popu...
Source: Animal Science Journal - March 30, 2023 Category: Zoology Authors: Yoshinobu Uemoto,
Kasumi Ichinoseki,
Toshimi Matsumoto,
Nozomi Oka,
Hironori Takamori,
Hiroshi Kadowaki,
Chihiro Shibata,
Eisaku Suzuki,
Toshihiro Okamura,
Hisashi Aso,
Haruki Kitazawa,
Masahiro Satoh,
Hirohide Uenishi,
Keiichi Suzuki Tags: RESEARCH ARTICLE Source Type: research
Use of a commercial indoor positioning system for monitoring resting time and moving distance in group ‐housed dairy calves
AbstractTo assess the usefulness of a commercially available indoor positioning system for monitoring the resting time and moving distance in group-housed dairy calves as indicators of their health status, five dairy calves were housed in a free barn, and their coordinate was recorded. The mean displacement (cm/s) within a minute showed a double-mixture distribution. Actual observations revealed that the minutes in the first distribution with shorter displacement were mostly the time that the calves spent lying. To predict the daily lying time and moving distance, a mixed distribution was divided at a threshold value. The ...
Source: Animal Science Journal - March 30, 2023 Category: Zoology Authors: Koichiro Ueda,
Takakyuki Ishii,
Yukako Nakai,
Kunio Odaka Tags: RESEARCH ARTICLE Source Type: research
Rumen microbial composition associated with the non ‐glucogenic to glucogenic short‐chain fatty acids ratio in Holstein cows
This study aimed to determine the physiological features and rumen microbial composition associated with the non-glucogenic-to-glucogenic short-chain fatty acids ratio (NGR). Holstein cows were housed in a free-stall barn with an automatic milking system and fed a partially mixed ration. Physiological and microbial analyses were performed on 66 datasets collected from 66 cows (50 –250 days in milk). NGR was positively correlated with ruminal pH, relative abundances of protozoa and fungi, methane conversion factor, methane intensity, plasma lipids, parity, and milk fat, and negatively correlated with total short-chain f...
Source: Animal Science Journal - March 30, 2023 Category: Zoology Authors: Shuhei Takizawa,
Takumi Shinkai,
Yosuke Kobayashi,
Masahiro Masuda,
Kenji Hashiba,
Kota Uchisawa,
Fuminori Terada Tags: RESEARCH ARTICLE Source Type: research
Prediction of methane emissions from fattening cattle using the methane ‐to‐carbon dioxide ratio
This study aimed to develop a prediction equation for methane (CH4) emissions from fattening cattle based on the CH4/carbon dioxide (CO2) ratio and validate the predictive ability of the developed equation. The prediction equation was developed using the CH4/CO2 ratio combined with oxygen consumption and respiratory quotient estimations that were theoretically calculated from the relation between gas emissions and energy metabolism. To validate the prediction equation, gas measurements in the headboxes were conducted using eight Japanese Black steers. The predictive ability of the developed equation was compared with that ...
Source: Animal Science Journal - March 30, 2023 Category: Zoology Authors: Kohei Oikawa,
Tomoyuki Suzuki,
Yuko Kamiya,
Mikito Higuchi,
Tomoya Yamada,
Mitsuru Kamiya,
Fuminori Terada Tags: RESEARCH ARTICLE Source Type: research
Menthol application on healthy and inflamed goat udders changes antimicrobial components in milk
AbstractMammary glands with mastitis are usually treated with antibiotics in combination with anti-inflammatory drug application on the udder skin. Menthol is an anti-inflammatory drug. The aim of the present study was to investigate the effect of surface application of menthol on goat udders on the production of antimicrobial components in milk. Goats (5 Shiba and 11 Tokara goats) were subjected to menthol application to the udder under both healthy and inflammatory conditions. An intramammary infusion of lipopolysaccharides was carried out to induce inflammatory conditions in the udder. Milk samples were collected to det...
Source: Animal Science Journal - March 29, 2023 Category: Zoology Authors: Ruri Ohno,
Naoki Suzuki,
Yusaku Tsugami,
Takahiro Nii,
Ken Kobayashi,
Naoki Isobe Tags: RESEARCH ARTICLE Source Type: research
Comparison of carcass traits and nutritional profile in two different broiler ‐type duck lines
AbstractCherry Valley ducks (CVDs) and White Kaiya ducks (WKDs) are judged to be fast- and slow-growing lines, respectively. To investigate the carcass traits and nutritional profile at their marketable ages, 12 birds (38 days for CVDs,n = 6; 56 days for WKDs,n = 6) were randomly selected and slaughtered. Indicators such as breast muscle weight, shear force, and proximate composition were comprehensively detected. Although the carcass and breast muscle weight in WKDs were significantly lower, remarkably higher intramuscular fat and tenderness and less moisture content were observed in WKDs. Besides, WKDs conta...
Source: Animal Science Journal - March 27, 2023 Category: Zoology Authors: Wen Gao,
Zhengfeng Cao,
Yu Zhang,
Yang Zhang,
Wenming Zhao,
Guohong Chen,
Bichun Li,
Qi Xu Tags: RESEARCH ARTICLE Source Type: research
L ‐histidine inhibits the heat‐induced gelation of actomyosin in a low ionic strength solution
In conclusion, L-histidine might suppress the aggregation of actomyosin a nd inhibit heat-induced gelation in a low ionic strength solution. (Source: Animal Science Journal)
Source: Animal Science Journal - March 21, 2023 Category: Zoology Authors: Toru Hayakawa,
Yu Kubono,
Shuji Fujii,
Jun ‐ichi Wakamatsu,
Haruto Kumura Tags: RESEARCH ARTICLE Source Type: research
