Results 21 to 30 of about 39,439 (238)
Despite the availability of data on plants and their pollinators from the Indian sub‐continent, detailed investigations that explain the intricacy of the mutualistic interaction at both population and community levels have largely been limited. This review explores the current status of pollination ecology research in India and suggests future ...
Arjun Adit+3 more
wiley +1 more source
在笼养情况下,东北虎(Pantheratigris altaica)的饲养繁殖报道很多,但大群散放情况下的繁殖行为观察还少见报道.我园自1995年建园以来,在散放东北虎的饲养管理和繁殖方面积累了一些经验.从1998年第一例繁殖成功至今,共繁殖30多只东北虎.期间,我们对东北虎的繁殖行为进行了较详细的观察,现总结如下.
刘树光+4 more
doaj
The migratory behaviour of streaked shearwaters [PDF]
第32回極域生物シンポジウムポスター発
Philip Trathan+7 more
core +1 more source
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
温帯林における木本性ツル植物の生活史戦略としてのクローン繁殖の役割と分布パターンへの影響 [PDF]
学位論文全文のタイトルは以下のとおり (to → on)The Role of Clonal Reproduction as a Life History Strategy and its Contribution on the Distribution Patterns of Liana Species in a Temperate Forest筑波大学 (University of Tsukuba ...
MORI Hideki, 森 英樹
core +1 more source
The One Plan Approach to Conservation of the International Union for Conservation of Nature highlights the importance of combining on‐site conservation actions with captive breeding efforts. Among vertebrates, amphibians are one of the groups with the highest proportion of species threatened with extinction.
Marie Borgwerth+6 more
wiley +1 more source
本文分析了普氏野马在栏养条件下四年的繁殖情况,报道了普氏野马在新疆野马饲养繁殖中心的繁殖率、增长率和成活率。四年共繁殖13胎,成活幼驹13匹,成活率100%。
张俊, 颜辉, 马成德
doaj
小扭口藓(Barbula indica)芽胞发育特征的实验研究 [PDF]
在光照培养箱中人工对照培养小扭口藓(Barbulaindica(Hook. )Spreng)的芽胞,显微镜下观察并记录其发育成配子体的全过程。结果表明:小扭口藓芽胞在3 ~4d即可萌发; 10d左右开始分化出绿丝体、轴丝体及假根; 18d,轴丝体上的侧枝顶端细胞以分生缢割的方式产生单细胞或多细胞芽胞; 40d,轴丝体上开始出现配子体原始细胞;之后,配子体原始细胞发育成桑椹状的幼小配子体。还对芽胞形态发育、生理生态及配子体发生过程的特点进行了分析和讨论。,CN 23-1480/
赵建成,黄士良,李敏,张元明,王晓蕊,范庆书
core
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
繁殖期与非繁殖期麝鼠香腺中Atg2a和Atg9b基因转录水平分析
麝鼠是一种有很高经济价值的皮、香两用经济动物,其香腺发育机制至今未能阐明。本研究通过RT-qPCR检测繁殖期与非繁殖期麝鼠香腺中Atg2a和Atg9b基因的转录水平,结果显示非繁殖期两者转录水平分别约为繁殖期的43.7倍和16.6倍,提示麝鼠非繁殖期时香腺组织自噬水平增高。进而推测自噬机制在麝鼠非繁殖期香腺萎缩的过程中起到了重要的调节作用。
张 宇 吕鹏博 钱鑫慧 张博文 白素英
doaj