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首页> 外文期刊>Marine ecology >Female ornaments signal own and offspring quality in a sex-role-reversed fish with extreme male parental care
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Female ornaments signal own and offspring quality in a sex-role-reversed fish with extreme male parental care

机译：在极度男性育儿的情况下，雌性装饰物标志着性角色反转鱼的自身和后代质量

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Although female ornaments have been described in many taxa, the full spectrum of information conveyed by such traits together with the potential male fitness benefits are far from fully understood. Here, we used a sex-role-reversed species, the black-striped pipefish, Syngnathus abaster, where females are the ornamented sex and intensively compete for mates who present an extreme form of paternal care (male pregnancy). We investigated what information is conveyed by female traits and if males are using it during mate choice. We further assessed which traits would reflect offspring quality at birth. We found that although body length generally portrays information on female reproductive potential (gonadosomatic index and oocyte diameter), it does so indirectly. Different aspects of the female traits, such as stripe width and trunk broadness, were found to be better direct indicators. When size is kept constant, males prefer females with wider stripes. Moreover, stripe coloration was found to reflect offspring quality as darker-striped females produced larger newborns. Our observations suggest that in a species with exclusive paternal care, independently from the male's direct investment in reproduction, female contribution decisively impacts male fitness. Thus, at least in sex-role-reversed species such as the black striped pipefish, female ornaments can be selected in an analogous way to those of males in species with conventional sex roles (i.e. by mate choice).
机译：尽管在许多生物分类中已经描述了女性饰品，但是，由这些特征传达的全部信息以及潜在的男性健身益处仍未得到充分理解。在这里，我们使用了一种性角色相反的物种，即黑条纹的pipe鱼Syngnathus abaster，雌性是有装饰性的，并激烈竞争表现出极端形式的父权照顾（雄性怀孕）的配偶。我们调查了女性特质传达的信息以及男性在择偶时是否使用了这些信息。我们进一步评估了哪些特征将反映出生时的后代质量。我们发现，尽管体长通常描绘女性生殖潜能的信息（性腺体指数和卵母细胞直径），但它间接地体现了这一点。女性特征的不同方面，例如条纹宽度和躯干宽度，被发现是更好的直接指标。当尺寸保持恒定时，男性更喜欢条纹较大的女性。此外，发现条纹的颜色反映了后代的质量，因为深色条纹的雌性繁殖出较大的新生儿。我们的观察结果表明，在具有独家父权照顾的物种中，与雄性对繁殖的直接投资无关，雌性的贡献对雄性适应性具有决定性的影响。因此，至少在性角色颠倒的物种例如黑色条纹的pipe鱼中，可以以与具有常规性别角色的物种中的雄性相似的方式来选择雌性装饰品（即通过配偶选择）。

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