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青藏高原赭红尾鸲的繁殖 被引量:3
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作者 穆红燕 刘发 杨萌 《动物学报》 SCIE CAS CSCD 北大核心 2008年第2期201-208,共8页
在青藏高原东南缘,海拔高度3470m的尕海-则岔国家级自然保护区尕海保护站,研究了赭红尾鸲普通亚种(Phoenicurus ochruros rufiventris)的繁殖。目的是检验高海拔鸟类的雏鸟是否发育更快和产小窝大卵、是否有更高的离巢率。赭红尾鸲营巢... 在青藏高原东南缘,海拔高度3470m的尕海-则岔国家级自然保护区尕海保护站,研究了赭红尾鸲普通亚种(Phoenicurus ochruros rufiventris)的繁殖。目的是检验高海拔鸟类的雏鸟是否发育更快和产小窝大卵、是否有更高的离巢率。赭红尾鸲营巢洞中,平均窝卵数4.8(3-6)枚,卵的大小23.33mm×14.95mm,同低海拔的相近种比较产小窝大卵。孵卵由雌鸟承担,孵卵期13-14d,孵化率64.5%。雏鸟留巢期16d-19d,巢成功率81.3%,雏鸟离巢率83.33%。高海拔红尾鸲产小窝大卵和加强双亲抚育,但高海拔红尾鸲并没有显著提高雏鸟离巢率。高海拔红尾鸲低温下增加双亲对雏鸟的抚育并没有使雏鸟发育加快,反而较低海拔近缘种的幼鸟发育缓慢。因此,延长留巢期不只是Badyaev和Ghalambor(2001)所认为增加雏鸟的质量,而是缺氧和低温协同作用的自然选择结果。 展开更多
关键词 赭红尾鸲 青藏高原 尕海 繁殖 离巢率
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Effects of Different Bovine Sperm Capacitation Methods on Fertilization in vitro 被引量:4
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作者 佟桂芝 韩永胜 +1 位作者 宋斌 王洪宝 《Agricultural Science & Technology》 CAS 2017年第5期846-847,共2页
In order to improve the in vitro fertilization rate of bovine, the effects of different sperm capacitation methods on fertilization were investigated. Total two treatments were designed: two-time centrifugation (C)... In order to improve the in vitro fertilization rate of bovine, the effects of different sperm capacitation methods on fertilization were investigated. Total two treatments were designed: two-time centrifugation (C), and one-time centrifugation and swim-up method (CS). The results showed that the cleavage rate in the C treatment group was (75.6±4.5)%, which showed no difference compared with that ((76.4±1.9)%) in the CS treatment group (P〉0.05); there was also no significant dif- ference in blastocyst rate between the two treatment groups ((35.7±4.1)% vs. (36.3± 2.7)%, P〉0.05). However, the CS treatment significantly saved the capacitation time in vitro. 展开更多
关键词 Capacitation method CENTRIFUGATION Swim-up method Ovary ot carcass Cleavage rate Blastocyst rate
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