THE EFFECTS OF BODY SIZE ON MATING FEATURES IN A FIELD POPULATION OF THE HERMAPHRODITIC SEA HARE APLYSIA KURODAI BABA, 1937 (GASTROPODA: OPISTHOBRANCHIA)
THE EFFECTS OF BODY SIZE ON MATING FEATURES IN A FIELD POPULATION OF THE HERMAPHRODITIC SEA HARE APLYSIA KURODAI BABA, 1937 (GASTROPODA: OPISTHOBRANCHIA)
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雌雄同体海兔 ALYSIA KURODAI BABA, 1937（腹足纲：后鳃亚纲）野外种群体型对交配特征的影响
DOI：
10.1093/mollus/62.3.381
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
Y. Yusa
中科院分区：
文献类型：
--
作者：
Y. Yusa
在野外观察了两性海兔黑线海兔的交配行为，探讨了个体大小对各种交配特征的影响。与小型个体相比，大型腹足类动物无论是雄性还是雌性，都会与更多的伴侣交配，也会与更大的伙伴交配(体型匹配的交配)。大型腹足类也更频繁地作为雌性交配，而不是作为雄性交配，而且往往比小型腹足动物更容易被邻近的个体选择为雌性交配伙伴，但不作为雄性伙伴。所有这些结果表明，作为雌性，体型较大的个体比体型较小的个体具有一定的交配优势，这可能是因为男性伴侣对大型女性伴侣的偏好。与此同时，研究结果表明，雄性体型较大的交配优势可能是有限的，如果有的话。对体型较大的女性伴侣的偏好也与她们的交配时间比较小的女性伴侣长这一事实相一致。雌性在交配时体型较大的优势比雄性更大，这意味着在配偶决定时的性选择对雌性大小的影响比对雄性大小的影响更大，而且在这种两性动物中，交配时的整个性别选择的方向可能是相反的。
Mating behaviour of the hermaphroditic sea hare Aplysia kurodai Baba was observed in the field to investigate the effects of body size on various mating features. Compared with small individuals, large gastropods mated with more partners both as males and as females, and also with larger partners (size-assortative mating). Large gastropods also mated more frequently as females but not as males, and tended to be selected as female mating partners more often than small ones by neighbouring individuals but not as male partners. All these results suggest some mating advantage of large individuals over small ones as females, probably because of the preference by male partners for large female partners. At the same time, the results suggest that the mating advantage of large size as males may be limited, if any. The preference for large female partners is also consistent with the fact that their mating was longer than that of small ones. The greater advantage of large size in mating as females, than as males, means that sexual selection at mate determination acts more strongly on female size than on male size and that the direction of total sexual selection at mating is probably reversed in this hermaphrodite