高原鼠兔的季节性繁殖

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	高原鼠兔的季节性繁殖
	李子巍; 孙儒泳; 杜继曾
	1998
发表期刊	兽类学报
卷号	18 期号:1 页码:42
其他摘要	A nnual changes of the rep roduct ive act ivity in adult male p lateau p ika (Ochotona curzoniae) , a small endemic mammal in Q inghai2T ibet P lateau, w ere invest igated from J anuary to December, 1991. A ll of the animals w ere k illed and decap itated during the nigh t (23:00～ 24:00) and the p lasma, p ineal glands, testes ep ididym is, sem inal vesicles, deferent ducts were co llected and used for biochemical, and histo logical studies. Significant changes associated with seasonal cycles were found. (1) In February～ early April, the restoration phase, the weights of testes, epididym ides and deferent ducts were increased; the process of sperm atogenesis was strengthened and testo sterone level in plasma was increased, but the pineal weight and its melatonin content were decreased. (2) During the middle of April～ late May, the sexually active phase, a significant elevation of gonadal activity was observed. In this period, gonadalw eights were increased, spermatogenesis was completed, pineal weights were decreased and melatonin contents were fluctuated at alow level. These results suggested the increasing in sexual activity as well as in the ability of testo sterone secretion. (3) A striking reduction of test icular activity appears in June～A ugust. In this inhibition phase, gonada lweight, process of sperm atogenesis, plasma testo sterone level were decreased while the pineal weight and pineal melatonin content were increased. (4) During Sep tember～ J anuary, the sexually quiescent phase, declining in weights of testes and epididymides, arrest of spermatogenesis, decreasing of plasma testo sterone concent ration, fluctuating in pineal weights and increasing in pinealmelatonin level were observed. Our findings indicated that the male pikas under natural conditions exhibited an annual rep roductive cycle. A possible relationship between pineal activity and reproductive function was also suggested.
关键词	Plateau Pika (Ochotona Curzoniae) Reproduction
学科领域	动物学
收录类别	CSCD
语种	英语
CSCD记录号	CSCD:460523
引用统计
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/1056
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	李子巍,孙儒泳,杜继曾. 高原鼠兔的季节性繁殖[J]. 兽类学报,1998,18(1):42.
APA	李子巍,孙儒泳,&杜继曾.(1998).高原鼠兔的季节性繁殖.兽类学报,18(1),42.
MLA	李子巍,et al."高原鼠兔的季节性繁殖".兽类学报 18.1(1998):42.

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