Territorial males can sire more offspring in nests with smaller doors in the Cichlid Lamprologus lemairii
Territorial males can sire more offspring in nests with smaller doors in the Cichlid Lamprologus lemairii
复制标题
在慈鲷中，具有领地意识的雄性可以在门较小的巢穴中繁殖更多的后代
DOI：
10.1093/jhered/esu009
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发表时间：
2014
影响因子：
3.1
通讯作者：
and M Kohda
中科院分区：
文献类型：
--
作者：
K Ota;S Awata;M Morita;R Yokoyama;and M Kohda
为了研究领地雄性如何对抗生殖寄生虫，我们使用 5 个微卫星位点和决定坦噶尼喀湖慈鲷 Lamprologus lemairii 野生种群繁殖成功的因素，检查了领地雄性所守护的鱼卵的亲子关系。雌性进入岩洞（巢穴）并在里面产卵，而领地性雄性则在巢穴开口处释放精液。运动鞋试图冲进巢穴，但有领地意识的雄性经常会打断这种尝试。领地雄性的体型（领地防御能力）和巢穴开口的大小（防止运动鞋侵入巢穴的能力）预计是影响交配前阶段亲子关系的因素，而鱼白品质性状是影响交配后阶段亲子关系的因素。对 477 只后代的亲子分析显示，大多数窝中很少或根本没有戴绿帽的后代，并且在分析的 10 窝中，有 7 窝雄性在 7 窝中产下了超过 80% 的卵。领地较大的雄性在开口较窄的巢中产卵，繁殖成功率更高。相比之下，母猪的任何性状均不会影响配种成功率。这些表明领地雄性 L.lemairii 采用交配前策略，从而有效防止生殖寄生。
To examine how territorial males counter reproductive parasites, we examined the paternity of broods guarded by territorial males using 5 microsatellite loci and factors that determine siring success in a wild population of the Lake Tanganyika cichlidLamprologus lemairii. Females enter rock holes (nests) and spawn inside, and territorial males release milt over the nest openings. Sneakers attempt to dart into the nests, but territorial males often interrupt the attempt. The body size of territorial males (territorial defense ability) and the size of nest opening (the ability to prevent sneakers from nest intrusions) are predicted to be factors that affect paternity at the premating stage, whereas milt quality traits are factors that affect paternity at the postmating stage. Parentage analyses of 477 offspring revealed that most clutches have few or no cuckolders, and territorial males sired >80% of eggs in 7 of the 10 analyzed clutches. Larger territorial males that spawned in nests with narrower openings had greater siring success. In contrast, none of the milt traits affected the siring success. These suggest that territorial maleL.lemairiiadopt premating strategies whereby they effectively prevent reproductive parasitism.