搜索结果: 1-15 共查到“知识库 特种经济动物饲养学”相关记录85条 . 查询时间(2.109 秒)
Genetic parameters for residual feed intake in a random population of Pekin duck
Genetic Parameters Residual Feed Intake Pekin Duck
2017/3/8
The feed intake (FI) and feed efficiency are economically important traits in ducks. To obtain insight into this economically important trait, we designed an experiment based on the residual feed inta...
A whole genome association study to detect additive and dominant single nucleotide polymorphisms for growth and carcass traits in Korean native cattle,Hanwoo
Hanwoo Single Nucleotide Polymorphism Whole Genome Association Carcass Traits Growth Traits
2017/3/7
A whole genome association study was conducted to identify single nucleotide polymorphisms (SNPs) with additive and dominant effects for growth and carcass traits in Korean native cattle, Hanwoo.
Polymorphism and expression of the tumour necrosis factor-alpha (TNF-alpha) gene in non-infected cows and in cows naturally infected with the bovine leukaemia virus
TNF-alpha gene polymorphism gene expression
2016/1/29
The objective of this study was to determine the influence of TNF-alpha gene polymorphism at position –824 A > G on TNF-alpha gene expression in BLV-positive animals with aleukaemic (AL) and persisten...
The “female effect” positively affects the appetitive and consummatory sexual behaviour and testosterone concentrations of Alpine male goats under subtropical conditions
seasonal reproduction pheromonal communication Alpine bucks
2015/7/2
The aim of this study was to evaluate the possible action of the “female effect” by evaluating if exposure to estrogenized females would affect sexual behaviour and testosterone concentrations while a...
Mercury bioaccumulation in hair and skin of arctic foxes (Vulpes lagopus) and silver foxes (Vulpes vulpes) in rural and urbanized region
farm Canidae hair coat environment mercury level
2015/7/2
Mercury bioaccumulation in hair and skin of silver and arctic foxes farmed in typically rural and urbanized regions (Wielkopolskie Voivodship, Poland) was assessed. Hair and skin samples were collecte...
Effects of dietary copper supplementation on nutrient digestibility, serum biochemical indices, and growth rate of young female mink (Neovison vison)
minks copper sulfate fat digestibility
2015/7/2
The objective of this study was to determine whether nutrient digestibility and growth performance of mink were affected by different dietary copper levels. Ninety-six 60-day-old healthy female minks ...
Analyses of genetic relationships between linear type traits, fat-to-protein ratio, milk production traits, and somatic cell count in first-parity Czech Holstein cows
Holstein cattle genetic parameters milk yield somatic cell score
2015/7/2
Genetic and phenotypic correlations between production traits, selected linear type traits, and somatic cell score were estimated. The results could be useful for breeding programs involving Czech Hol...
Changes in fatty acid profile and iodine content in milk as influenced by the inclusion of extruded rapeseed cake in the diet of dairy cows
extruded rapeseed cake fatty acids
2015/6/8
The aim of the study was to evaluate the effect of extruded rapeseed cake in diets of dairy cows on changes in milk fatty acid profile and iodine content in milk and on the thyroid gland status. An ex...
Relationships between milk urea and production and fertility traits in Holstein dairy herds in the Czech Republic
dairy cow reproduction probability of conception
2015/6/8
The objective of this study was to determine how the concentration of milk urea (MU) and FPCM production affect reproduction in selected Holstein dairy herds in the Czech Republic. A retrospective, ob...
Effect of carbohydrates in grass silage-based diets on in sacco ruminal degradability of barley (Hordeum vulgare L. cv. Lomerit) grain ground to different particle sizes
cattle grass silage nonstructural carbohydrates
2015/6/8
The effect of carbohydrates included in grass silage-based diets on in sacco degradability of dry matter (DM), crude protein (CP), neutral detergent fibre (NDF) and cellulose (CE) of barley (Hordeum v...
Effect of rumen-protected methionine, lysine or both on milk production and plasma amino acids of high-yielding dairy cows
amino acids rumen protection dairy cow
2015/6/8
The objective of this study was to determine the effect of supplemental lysine (Lys), methionine (Met) or both amino acids added in the form of rumen-protected (RP) tablets with copolymer coating to a...
Covariance components by a repeatability model in Slovenian dairy sheep using test-day records
milk traits genetic and environmental effects heritability
2015/6/8
The estimation of covariance components for daily milk yield, fat and protein content was performed in three Slovenian dairy sheep breeds (Bovec, Improved Bovec, and Istrian Pramenka). In the period 1...
Breeding value evaluation in Polish fur animals: Statistical description of fur coat and reproduction traits – relationship and inbreeding
fur animals fur coat inbreeding
2015/6/5
Three data sets were available: records on conformation and coat traits for the arctic fox from one farm (5 540 observations, collected between 1983 and 1997), and the same traits for the silver fox f...
Contact and non-contact thermometry in the milk acquisition process
temperatures non-contact thermometer mammary gland milking house
2015/6/5
Temperatures of the northern wall, ceiling and floor of a 2 × 12 milking house as well as of a waiting area in front of the milking house were measured for 24 hours a day in the winter season with an ...
A relationship between production and reproduction traits in cows of Czech Pied cattle
milk yield pedigree value Czech Pied cattle
2015/6/5
The purpose of the paper was to analyse the effect of the level of milk yield and breeding value on reproduction of Czech pied cows. In the study of cows that calved in the period 1999–2001 the result...