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同时而非先后一雌多雄交配增加不同温度下食蚜瓢虫的适合度
昆虫学报, 2014, Vol.57 (10), p.1180-1187
[Peer Reviewed Journal]
ISSN: 0454-6296
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Title:
同时而非先后一雌多雄交配增加不同温度下食蚜瓢虫的适合度
Author:
0MKAR Geetanjali MISHRA
Subjects:
一雌多雄
;
交配选择
;
后代适应性
;
瓢虫科
;
繁殖能力
;
黄斑盘瓢虫
Is Part Of:
昆虫学报, 2014, Vol.57 (10), p.1180-1187
Description:
【目的】尽管一雌多雄在瓢虫科中常见,但各研究中获得的数据不足以解释雌虫多次交配和一雌多雄的一般适应性意义或适合度后果。本研究以温度为胁迫因子,旨在评价一雌多雄的某些益处(如增加的适合度)是否可传递给后代。【方法】本研究检测了黄斑盘瓢虫Coelophora saucia(Mulsant)3种交配处理中的适合度:一雌一雄(与同一雄虫交配5次,1次/d),先后一雌多雄(与5头不同的雄虫依次交配5次,即每天与新的雄虫交配1次),以及同时一雌多雄(放进5头雄虫,任由雌虫选择雄虫,交配5次,1次/d)。观察了各交配处理不同温度下(25,27和30℃)繁殖力、卵的育性、后代发育和存活。【结果】结果表明,经历一雌多雄然后进行交配选择或竞争的雌性的繁殖能力最强,后代能在更广温度范围内最好地适应发育和存活。但先后一雌多雄交配的雌性与一雌一雄交配的雌性的繁殖能力相似。【结论】结果说明,在无交配选择或雄性竞争的条件下,一雌多雄的益处不明显。这可能是由于在依次射精的雄性间存在精子竞争,或由于雌性的隐性选择。据我们所知,本研究中观察发现的无交配选择时不表现一雌多雄的益处的现象,之前在昆虫中未观察到过。
Language:
Chinese
Identifier:
ISSN: 0454-6296
Source:
Alma/SFX Local Collection
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