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首页> 外文期刊>The Royal Society Proceedings B: Biological Sciences >Evidence for biased use of sperm sources in wild female giant cuttlefish (Sepia apama)
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Evidence for biased use of sperm sources in wild female giant cuttlefish (Sepia apama)

机译：有证据表明在野生雌性巨乌贼（乌贼）中使用精子来源有偏见

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In species where females store sperm from their mates prior to fertilization, sperm competition is particularly probable. Female Sepia apama are polyandrous and have access to sperm from packages (spermatangia) deposited by males onto their buccal area during mating and to sperm stored in internal sperm-storage organs (receptacles) located below the beak. Here, we describe the structure of the sperm stores in the female's buccal area, use microsatellite DNA analyses to determine the genetic diversity of stored sperm and combine these data with offspring genotypes to determine the storage location of paternal sperm. The number of male genotypes represented in the sperm receptacles was significantly lower than that found among the spermatangia. Estimation of the volumes of sperm contained in the receptacles and the spermatangia were statistically comparable-, however, paternal sperm were more likely to have come from spermatangia than from the sperm receptacles. These results confirm a genetic polyandrous mating system in this species and suggest that fertilization pattern with respect to the sperm stores used is not random.
机译：在雌性受精前从其伴侣处储存精子的物种中，精子竞争尤为可能。雌性棕褐色的雌蕊多毛，可以在交配时从雄性沉积的包装（精子）中获取精子，而雄性则将其存放在颊部内部的精子存储器官（接受器）中。在这里，我们描述了女性颊区域的精子存储结构，使用微卫星DNA分析来确定所存储精子的遗传多样性，并将这些数据与后代基因型相结合以确定父本精子的存储位置。精子贮器中表现出的男性基因型数量显着低于精子症中发现的男性基因型数量。估计容器中包含的精子量和精子的数量在统计上是可比的-但是，父亲的精子更有可能来自精子症，而不是精子。这些结果证实了该物种中的遗传多雄性交配系统，并暗示了相对于所用精子库的受精方式不是随机的。

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