Results 41 to 50 of about 2,626 (168)

东方白鹳繁殖期能量收支对策

open access: yes野生动物学报, 2013
在笼养东方白鹤繁殖研究的基础上,对其能量分配进行了进一步研究,结果表明:笼养东方白鹳繁殖期,雌鹳和雄鹳的可代谢能摄入率无显著差异;采食量在繁殖期与非繁殖期差异很大 ...
马雪峰, 田秀华, 黄海涛
doaj  

ナガスクジラ科鯨類の精巣における形態学的および組織学的構造とその繁殖特性 [PDF]

open access: yes, 2015
東京海洋大学博士学位論文 平成26年度(2014) 応用環境システム学 課程博士 甲第343号指導教員: 加藤秀弘全文公表年月日: 2018-05 ...
井上 聡子
core   +1 more source

Fat storage and drought tolerance in a seasonally‐adapted primate: Implications for modeling the effects of animal responses to global climate change 灵长类动物在季节性适应下的脂肪储存和耐旱性:模拟动物应对全球气候变化影响的启示

open access: yesIntegrative Conservation, Volume 3, Issue 3, Page 168-182, September 2024.
Using long‐term field data, we examined the impact of severe droughts on the health, reproductive success, and behavior of the critically endangered Verreaux's sifaka (Propithecus verreauxi) in Madagascar's seasonally dry tropical forest. Despite reduced availability of high‐quality foods, sifaka exhibited stable body condition and reproductive success,
Carrie C. Veilleux   +2 more
wiley   +1 more source

寒鸦繁殖生态的研究

open access: yes野生动物学报, 1995
1992-1994年间于河北省塞罕坝地区对寒鸦繁殖生态进行了研究,包括其繁殖期的求偶、交尾、筑巢、产卵、育雏以及雏鸟的生长变化、日平均增长量和食性等,并对繁殖期的天敌进行了观察。
侯建华   +3 more
doaj  

Assessing predictions from optimal egg theory for an ectotherm relative to habitat duration 涉及生境条件持续时间的变温动物最优卵大小理论的预测评估

open access: yesWildlife Letters, Volume 2, Issue 3, Page 124-130, September 2024.
Median ovum size (mm; ±1 quartile) of wood frogs from three different wetland classes (long = long hydroperiods, short = short hydroperiods, and fish presence/absence) near Churchill, Manitoba, Canada from 2014 to 2019. Data points are individual egg mass values. Abstract Optimal egg size theory predicts females must balance investment per offspring to
Jon M. Davenport   +3 more
wiley   +1 more source

笼养绿孔雀繁殖期行为观察

open access: yes野生动物学报, 2007
采用扫描取样法对秦皇岛野生动物园40只笼养绿孔雀繁殖期的行为进行了为期58d,325h的观察,结果显示繁殖期各行为所占的比例分别为休息31.31%、取食22.03%、理羽16.37%、游走15.93%、警戒9.79%和繁殖4.59%。方差分析和μ检验表明:天气状况对笼养绿孔雀的休息、取食、理羽和游走行为的时间分配的影响明显,但对繁殖和警戒行为影响不大。
冯锋, 毕延台, 何相宝
doaj  

Semantic modeling of topography with digital elevation data and its applications for mapping potential habitat [PDF]

open access: yes, 2008
Thesis (Ph. D. in Science)--University of Tsukuba, (A), no.
松浦 俊也
core  

人工饲养白枕鹤繁殖期行为观察

open access: yes野生动物学报, 2007
本研究对笼养白枕鹤行为进行观察记录和分析,结果表明笼养白枕鹤繁殖期行为日活动节律依次为休息(32.15%)、取食(30.02%)、理羽(12.92%)、警戒(12.14%)、游走(8.86%)、繁殖(3.90%),另外,繁殖期的不同时期、不同性别其行为时间分配都存在一定差异。人为干扰,邻近笼舍内东方白鹳的干扰,以及外界噪音的干扰对笼养白枕鹤繁殖期行为影响十分显著。同时气候条件以及温度变化对笼养白枕鹤总体行为亦存在一定影响。
于建华, 高忠燕, 田秀华
doaj  

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