Protogynous hermaphroditism in Crustacea: a new example from Tanaidacea
Protogynous hermaphroditism in Crustacea: a new example from Tanaidacea
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甲壳类的先熟雌雄同体：来自 Tanaidacea 的一个新例子
DOI：
10.1139/cjz-2022-0033
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发表时间：
2022
影响因子：
1.4
通讯作者：
Chizue Hiruta
中科院分区：
文献类型：
--
作者：
Keiichi Kakui;Chizue Hiruta
两性畸形在甲壳纲中已被广泛报道，但雌性变成雄性的雌雄同体现象显然是罕见的，仅限于等足目和Tanaidacea。在后者中，雌性先熟现象已被证明在只有七个物种代表六个属的饲养实验和其他几个属和种通过形态。本文通过饲养实验和组织学观察，证实了Tanaidaceae种Nesotanaissp. ryukyuensisKakui，Kajihara and Mawatari，2010.我们的饲养实验和野生个体的大小分布数据表明，雌性可以在不同的大小（=年龄）改变性别。我们发现一个人外部识别为一个女性包含卵巢和睾丸，表明公开的女性个体经历了一个短暂的过渡阶段，同时雌雄同体前变性蜕皮。我们讨论了变性女性的广泛的大小分布，男性的寿命短，管居住的生活方式之间的关系。
Hermaphroditism has been widely reported in the Crustacea, but protogyny, in which females change to males, is apparently rare and restricted to the peracarid orders Isopoda and Tanaidacea. In the latter, protogyny has been demonstrated in only seven species representing six genera by rearing experiments and indicated for several other genera and species through morphology. Here, we show through rearing experiment and histological observations, protogynous hermaphroditism in the tanaidacean speciesNesotanaissp. aff.ryukyuensisKakui, Kajihara and Mawatari, 2010. Our rearing experiment and size distribution data for wild individuals showed that females can change sex at various sizes (= ages). We found one individual identified externally as a female containing both ovaries and testes, indicating that overt female individuals undergo a short transitional phase as simultaneous hermaphrodites before the sex-change molt. We discuss the relationship among the wide size distribution of sex-changing females, the short life span of males, and the tube-dwelling mode of life.