Results 21 to 30 of about 2,626 (168)
Movement of short-tailed shearwaters with environmental gradient in the sub-Arctic Pacific and Arctic seas through summer to autumn [PDF]
, 2016 第4回極域科学シンポジウム横断セッション：[IA] 「急変する北極気候システム及びその全球的な影響の総合的解明」―GRENE北極気候変動研究事業研究成果報告2013―11月12日（火） 国立極地研究所 ...
Catherine Meathrel +5 more
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Integrating adult occurrence and reproduction data to identify conservation measures for amphibians
Conservation Biology, Volume 39, Issue 1, February 2025.Abstract Monitoring programs are pivotal to establishing sound management. Due to economic, logistic, and time limitations, monitoring programs often overlook differences among life‐history stages. However, species occurrence does not necessarily mean population viability, and it is unclear to what extent monitoring programs that do not consider ...
Elia Lo Parrino +4 more
wiley +1 more source
野生动物学报, 2013 黑龙江七星河国家级自然保护区位于三江平原腹地,是丹项鹤的重要繁殖地,2011年4～5月对保护区繁殖前期的丹顶鹤孵化行为进行了观察,结果表明:丹顶鹤孵化期的各种行为具有较强的规律性,各行为频率依次为:繁殖31.34%、觅食28.26%、警戒20.12%、静栖8.99%、游走4.51%、其他6.78%。在不同繁殖阶段,丹顶鹤各行为的生境分配存在一定差异。在产卵前期,繁殖行为主要发生在芦苇火烧地,觅食行为主要发生在农田;在孵化初期,繁殖行主要发生在苇丛里,觅食行为主要发生在芦苇火烧地。
姜娜, 李晓民
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Ecological Applications, Volume 35, Issue 1, January 2025.Abstract Although agriculture and plantation forestry have decreased natural open habitats and old‐growth forests, conservation in managed lands is considered essential for achieving “nature‐positive” goals that reverse biodiversity trends from negative to positive. From subboreal to temperate regions, mature conifer plantations with broadleaved trees (
Kazuhiro Kawamura +2 more
wiley +1 more source
野生动物学报, 2014 2007年3月～2008年2月,在哈尔滨北方森林动物园,选2对健康的成年丹顶鹤,采用目标取样和扫描取样相结合的方法进行了行为观测,同时收取粪便提取激素,利用放射免疫分析法(RIA)测定了笼养丹顶鹤粪样中睾酮、孕酮、雌二醇的浓度。试验结果表明:笼养丹顶鹤繁殖行为呈显著的季节变化,其对鸣、炫耀行为的高发期在3、4月 ...
王英树 田秀华 张冬冬 马雪峰 何相宝
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Establishing a laboratory colony of the Japanese lancelet (amphioxus) [PDF]
, 2012 Despite an intelest of long standing in the origin and evolution of vertebrates,recent contribution of studies on lancelets(amphioxus),cephalochordates,to this field is not much.One of the major reasons for this is difficulties in applying effective ...
Yasui, Kinya
core
Integrative Conservation, Volume 3, Issue 4, Page 368-381, December 2024.Lack of species information complicates understanding climate change vulnerability, but life history traits can be proxies for missing information. In the north‐central United States, useful traits for discriminating vulnerability of amphibians include range size, clutch size, diel activity patterns, and habitat breadth.
Ross K. Hinderer +2 more
wiley +1 more source
野生动物学报, 2017 2014年5月至2014年10月间,在青海省海北自治州祁连县野牛沟乡达玉村附近,从动态的角度研究高原鼠兔在其生境地繁殖季节前后血常规、血气和性激素的变化,并与繁殖期间的各种环境因子相关联,探讨鼠兔繁殖策略对环境及行为的响应。结果表明,可将该地区高原鼠兔的繁殖期分为过渡恢复阶段(5月以前); 繁殖旺盛阶段(5月下旬～7月中旬); 繁殖抑制阶段(7月下旬～9月下旬); 繁殖静止阶段(10月及10月以后)4个阶段,不同的繁殖阶段高原鼠兔在体重、繁殖指数、血常规指标、血气指标、睾丸相对重量 ...
谢惠春 罗巧玉 陈 志 马永贵
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Integrative Conservation, Volume 3, Issue 4, Page 294-311, December 2024.Freshwater biodiversity in China is threatened by multiple anthropogenic factors, and while there are some reasons to suppose it may be possible to bend the curve of biodiversity loss, the variety of threats and their likely interactions with ongoing climate change provide little basis for optimism. For example, the historic overexploitation of Yangtze
David Dudgeon
wiley +1 more source
野生动物学报, 1995 麻雀的消化道在繁殖期总重量、鲜重及干重均高于繁殖前期，分别增加了６１．２１％、３９．４２％和３２．１２％。其中小肠的长度、重量、鲜重及干重也明显增加了４．９２％、１３２．９５％、１７３．７４％和１２８．３３％，而胃内含物重量的增加更为显著。表明了鸟类在繁殖期间通过改变消化道的形态以增加对能量的需求，是鸟类保证繁殖成功的生存对策之一．
柳劲松 +4 more
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