搜索结果: 31-45 共查到“知识库 动物群落学”相关记录213条 . 查询时间(4.531 秒)
Effect of Plants Containing Secondary Compounds with Palm Oil on Feed Intake, Digestibility, Microbial Protein Synthesis and Microbial Population in Dairy Cows
Condensed Tannins Crude Saponins Rain Tree Pod Meal Palm Oil Rumen Microorganism Ruminant
2016/5/11
The objective of this study was to determine the effect of rain tree pod meal with palm oil supplementation on feed intake, digestibility, microbial protein synthesis and microbial populations in dair...
Effects of Dietary Supplementation with Hainanmycin on Protein Degradation and Populations of Ammonia-producing Bacteria In vitro
Ammonia-producing Bacteria Fermentation Hainanmycin Protein Degradation
2016/5/11
An in vitro fermentation was conducted to determine the effects of hainanmycin on protein degradation and populations of ammonia-producing bacteria. The substrates (DM basis) for in vitro fermentation...
Genetic Parameter Estimation in Seedstock Swine Population for Growth Performances
Swine Duroc Landrace Yorkshire Heritability Growth Ultrasound
2016/5/11
The objective of this study was to estimate genetic parameters that are to be used for across-herd genetic evaluations of seed stock pigs at GGP level. Performance data with pedigree information colle...
南四湖底栖动物群落结构特征及其与环境因子的关系
底栖动物 群落结构 环境因子 南四湖
2013/3/29
为了解南四湖大型底栖动物群落结构特征及其与环境因子的关系，于2010年对南四湖15个采样点的底栖动物和生态环境进行4次调查研究.结果表明：共检出底栖动物23种，栖息密度和生物量为311.57ind./m2和44.39g/m2；群落物种优势度指数较高，优势种集中于羽摇蚊幼虫（Chironomus plumosus）和霍甫水丝蚓（Limnodrilus hoffmeisteri），分别占个体总数的77...
等级结构稳定性是衡量群体凝聚力的重要指标,雌性等级结构稳定对于母系社会群体具有重要的生物学意义。本文采用目标动物取样和全事件记录相结合的方法,研究黄山短尾猴鱼鳞坑A1 群(YA1 群)和鱼鳞坑A2 群(YA2 群)的成年雌性分别在交配季节(2011 年9 ～ 12 月)和非交配季节(2012 年2 ～ 5 月)内的攻击-屈服行为。采用等级结构中雌性间攻击- 屈服频率、社会顺位和等级梯度3 个量化指...
2009 ～2012 年,对澳门翼手目(蝙蝠)物种多样性进行了调查。结果共捕捉到10 个物种,属5 科8 属,其中包括澳门原来记载的2 个物种,即蹄蝠科的大蹄蝠(Hipposideros armiger)和蝙蝠科的东亚伏翼(Pipistrellus abramus);本研究新增加8 个物种,即狐蝠科的犬蝠(Cynopterus sphinx) 和棕果蝠(Rousettus leschenaulti...
贵州草海冬季鸟类群落特征
鸟类群落组成 鸟类群落结构 多样性 自然保护区
2014/1/10
2010年12月～2011年1月采用样线法对贵州草海自然保护区内的鸟类进行了调查.根据植被特征划分出农田、蔬菜地、草甸、浅水区、深水区和树林6个鸟类群落,共记录到鸟类88种,隶属13目33科.其中,国家Ⅰ、Ⅱ级重点保护鸟类分别有1种和6种.鸟类群落总体密度(〖WTBX〗D〖WTBZ〗)、〖WTBX〗α〖WTBZ〗多样性指数(〖WTBX〗H′〖WTBZ〗)、优势度(〖WTBX〗C〖WTBZ〗) 和均...
Effect of Population Reduction on mtDNA Diversity and Demographic History of Korean Cattle Populations
Cattle Mitochondrial DNA Genetic Diversity Population Expansion
2016/5/10
The population sizes of three Korean indigenous cattle populations have been drastically reduced over the past decades. In this study, we examined the extent to which reduction in populations influenc...
Lactation Persistency as a Component Trait of the Selection Index and Increase in Reliability by Using Single Nucleotide Polymorphism in Net Merit Defined as the First Five Lactation Milk Yields and Herd Life
Economic Weights Milk Yield Persistency Herd Life Selection Index
2016/5/10
We first sought to clarify the effects of discounted rate, survival rate, and lactation persistency as a component trait of the selection index on net merit, defined as the first five lactation milks ...
Estimation of Effective Population Size in the Sapsaree: A Korean Native Dog (Canis familiaris)
Effective Population Size Inbreeding Rate Linkage Disequilibrium SNP Sapsaree Dog
2016/5/10
Effective population size (Ne) is an important measure to understand population structure and genetic variability in animal species. The objective of this study was to estimate Ne in Sapsaree dogs usi...
Effects of Bacteriophage Supplementation on Egg Performance, Egg Quality, Excreta Microflora, and Moisture Content in Laying Hens
Bacteriophage Egg Production Egg Albumen Excreta Microflora Laying Hens
2016/5/10
An experiment was conducted to evaluate the effects of bacteriophage supplementation on egg performance, egg quality, excreta microflora, and moisture content in laying hens. A total of 288 Hy-line br...
Effects of Bacteriophage Supplementation on Egg Performance, Egg Quality, Excreta Microflora, and Moisture Content in Laying Hens
Bacteriophage Egg Production Egg Albumen Excreta Microflora Laying Hens
2016/5/10
An experiment was conducted to evaluate the effects of bacteriophage supplementation on egg performance, egg quality, excreta microflora, and moisture content in laying hens. A total of 288 Hy-line br...
Phylogeography and Population Genetic Structure of Amur Grayling Thymallus grubii in the Amur Basin
Amur Grayling Population Genetic Structure Phylogeography Mitochondrial DNA Control Region
2016/5/10
Amur grayling, Thymallus grubii, is an important economic cold freshwater fish originally found in the Amur basin. Currently, suffering from loss of habitat and shrinking population size, T. grubii is...
Shallow Population Genetic Structures of Thread-sail Filefish (Stephanolepis cirrhifer) Populations from Korean Coastal Waters
Demographic History Population Genetic Structure Nucleotide Sequence Analysis
2016/5/9
Genetic diversities, population genetic structures and demographic histories of the thread-sail filefish Stephanolepis cirrhifer were investigated by nucleotide sequencing of 336 base pairs of the mit...
Genotype and Allelic Frequencies of a Newly Identified Mutation Causing Blindness in Jordanian Awassi Sheep Flocks
Awassi Sheep, Day Blindness, CNGA3 Gene, PCR- RFLP
2016/5/9
A total of 423 blood samples were collected (during 2009 and 2010) from all the ram holdings at three major Jordanian governmental Awassi breeding stations (Al-Khanasry, Al-Mushairfa and Al-Fjaje) and...