Results 11 to 20 of about 1,050,637 (156)
野生动物学报, 1985 鸳鸯（Aix galericulata）这种珍贵鸟类,过去一般认为在贵州为冬候鸟。近来年,贵州省内的动物学工作者,观察到鸳鸯在贵州省的遵义、铜仁、贵阳和贵定等部分地区留居,并且积累了一些繁殖资料（吴至康等,1983）。但关于繁殖生态的研究,未见有系统的报导。为此,我们于1983年4—5月,在梵净山东南麓,对鸳鸯繁殖生态作了初步观察,结果如下。
杨炯蠡, 邹迅, 林乾正
doaj +2 more sources
野生动物学报, 1991 本文通过笼养和野生棕胸竹鸡繁殖生态的比较表明:笼养棕胸竹鸡与野生棕胸竹鸡一样具有占区、求偶、交配、营巢和产卵等繁殖行为,但孵卵、育雏行为基本消失,这种变化的产生可能与环境条件和生理适应有关。
杨晓君
doaj +2 more sources
野生动物学报, 1983 虎纹伯劳（Lanius tigrinus）是一种经济鸟类,关于其繁殖生态的研究,国内尚未见有系统的报导。我们于1979年5—10月及翌年同期,在山西省太谷县,对虎纹伯劳的繁殖生态进行了初步的调查研究。1981年6—8月在太原市南郊区又做了一些补充调查。两地均位于太原盆地的平川地区,现将几年的资料整理报导如下。
刘焕金 +3 more
doaj +2 more sources
野生动物学报, 1989 本文记述了灰眶雀鹛在鼎湖山的种群生态分布情况,并对其繁殖习性作了报导。灰眶雀鹛的种群繁殖期为4—6月,每年只繁殖一次。巢为杯形,一般筑于林下灌丛中,窝卵数2—4枚,在繁殖期内各月份无明显变化;孵卵和育雏都由双亲鸟共同承担,孵化期11—13天,雏鸟一般于11—12日龄离巢;种群孵化率为83.3%,雏鸟成活率为91.4%。文中还报导了雏鸟的生长发育情况及食性。
周放
doaj +2 more sources
野生动物学报, 2009 2004～2005年,对人工饲养的长鬣蜥繁殖行为和生态习性进行了研究,结果表明:3～7月为长鬣蜥的繁殖期,繁殖行为主要表现为发情求偶、交配和产卵,5～6月为产卵高峰期,每条成熟的雌蜥年产卵2～3窝,平均窝卵数12（7～18）枚;雌蜥每窝产卵间隔33～45 d不等;平均单卵重3.06（2.80～3.50）g;卵径2.63 cm×1.18cm。在自然孵化温度和90%～95%的湿度下孵化期为60～98 d,孵化率52.34%,长鬣蜥幼体初生个体重2.50 g,体全长（头体+尾）14（4+10）cm。
侯方晖, 苏力, 邹洁建
doaj +2 more sources
In vitro culture, cryopreservation, and field reintroduction of the endangered Mingan thistle. [PDF]
Conserv BiolAbstract Current plant conservation efforts are hindered by, for example, poor seed germination, low viability, and insufficient propagation and preservation technologies. To address these problems, we devised an approach to plant conservation that integrates conservation, preservation, and restoration (CPR), which uses advanced in vitro techniques. We
Shukla MR +4 more
europepmc +2 more sources
Wildlife Letters, EarlyView.Using radiotelemetry, we found that the movement and home range of the endangered Sacalia bealei varied significantly across reproductive classes and seasons, with males exhibiting greater movement than females during wet and mating seasons. The species exhibits strong aquatic dependence, favoring deep pools interspaced among riffle‐pool sequences ...
Wing Sing Chan +3 more
wiley +1 more source
Advancing conservation breeding programs for marine invertebrates
Conservation Biology, EarlyView.Abstract In the face of ecosystem change and biodiversity loss caused by climate change and other stressors, conservation breeding, or captive breeding, with the aim of reintroduction for wild population recovery, is an emerging tool for preventing species’ extinction and rehabilitating ecosystems.
Elora H. López‐Nandam +3 more
wiley +1 more source
厚颌鲂(Megalobrama pellegrini)的繁殖生物学特征
, 2007 从长江上游一级支流龙溪河收集了1382尾厚颌鲂开展繁殖生物学研究。结果表明,厚颌鲂繁殖期为4～7月份,盛期为4～5月份,在繁殖季节可借第二性征辨别性别。繁殖群体主要由2、3龄个体组成,总性比♀∶♂=1∶1.83。厚颌鲂2龄初次性成熟(♀∶75%;♂∶94.7%),3龄个体全部成熟。最小性成熟雌性全长189.0mm,体长158.0mm,体重72.1g,成熟系数2.7%;雄性全长179.0mm,体长149.0mm,体重57.1g,成熟系数2.2%。厚颌鲂绝对怀卵量为(59587.22± ...
李文静 +3 more
core +2 more sources
Conservation Biology, EarlyView.Abstract Bycatch in fisheries is one of the most serious threats to pelagic seabirds, causing major population declines. Mitigation measures can reduce bycatch substantially, but many fisheries fail to apply best practices, and seabird mortality remains high.
V. Warwick‐Evans +2 more
wiley +1 more source