Results 11 to 20 of about 74,481 (162)
野生动物学报, 1995 鸳鸯的人工繁殖沈庆云，吴福海（柳浪公园百鸟天堂）（杭州动物园）鸳鸯（Ａｉｘｇａｌｅｒｉｃｕｌａｔａ）是国家重点保护的珍贵鸟类。主要在我国东北部繁殖，偶见有在我国南方自然繁殖的报导。而鸳鸯的人工繁殖，却未见报端。杭州柳浪公园１９９２年首次获得鸳鸯人工繁...
沈庆云, 吴福海
doaj +2 more sources
Flexible parental care in a songbird correlates with sex-specific responses to seasonal phenology, mating opportunity and reproductive success. [PDF]
J Anim EcolThis population‐comparative study reveals that male and female parents respond differently to social and ecological conditions. This sex‐specific responsive strategy is related to the incongruent parental care systems across populations in Chinese penduline tits.
Zheng J +5 more
europepmc +2 more sources
野生动物学报, 2010 济南动物园所饲养的亚洲象（Elephas maximus）于1997年首次繁殖成功,现已繁殖3胎3仔,幼象生长发育正常。在繁殖过程中,对亚洲象的发情、交配、妊娠、分娩、幼象发育等进行了详细观察,积累了亚洲象繁殖的资料和经验。
谢绪昌 +4 more
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
野生动物学报, 2005 动物是如何繁殖后代的?这个神秘而有趣的问题一直吸引人们不断去探索,从无性繁殖到有性繁殖,从鸥鸟孵卵到羚牛哺乳;再从孔雀开屏到百鸟争鸣,从盘羊顶角到猿猴争霸, 林林总总,不一而足。可以说,动物的繁殖行为真是五花八门,甚至是匪夷所思。每种动物都有自己的方式来保证种群的繁衍,而有些动物更有其独特的"绝招",现撷取一二,以飨读者。
胡祚均
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Extent of threats to marine fish from the online aquarium trade in the United States. [PDF]
Conserv BiolThe global marine aquarium hobby is a multibillion‐dollar industry, largely driven by demand from the United States. Much of this trade occurs online. We web scraped 4 major US‐based e‐commerce platforms selling marine aquarium fish to determine the retail price and source (wild capture, aquaculture, or both) of 13 families of ray‐finned marine fish ...
Lin B +6 more
europepmc +2 more sources
PLANTS, PEOPLE, PLANET, EarlyView.Understanding how cooperative interactions remain stable matters for biodiversity because many plants rely on specialist insects that can also impose reproductive costs. We studied the interaction between Sambucus sieboldiana and seed‐consuming Heterhelus beetles through detailed field observations and pollination experiments.
Suzu Kawashima +3 more
wiley +1 more source
, 2010 本发明涉及一种郁金香种球繁殖方法，该方法通过对郁金香的生态生物学性状的观测及栽培研究过程中所收集的资料为依据，其结果证实：郁金香适合于低温半干旱型环境进行种球繁殖，其中郁金香四季生长期的平均地温为-6-18℃，通过对郁金香在四季中环境的选择、温度、湿度、土壤的酸碱度、栽培深度及日照时间的变化进行了控制，使得郁金香种球繁殖达到了国际标准。该方法操作简单，安全可靠 ...
肖笃志.
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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
, 1994 根据野外调查和室内养殖的结果,华鳈一龄即达性成熟,绝对怀卵量在1040—5580粒之间,相对怀卵量为83.3—209.6;繁殖季节为4月下旬至7月中旬,繁殖高峰期在5月中下旬;繁殖群体主要由一、二龄组成,雌雄性比为1:1;精母细胞和卵母细胞都有分批成熟现象;卵分批产于流水中,为漂流性 ...
宋天祥,马骏
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