Martin Peer, Scholtz Gerhard
J Biomater Sci Polym Ed. 2012 Mar 5. doi: 10.1163/193724012X629031.
We describe an intersex specimen of the Marmorkrebs, the only obligate parthenogenetic freshwater crayfish with an all-female population. The individual was a fully functional female which possessed male-like first pleopods. Nevertheless, it reproduced successfully and the offspring were normally developed parthenogenetic females, lacking any trace of male traits. The general rarity of aberrant sexual traits in freshwater crayfishes, in particular in Procambarus, is discussed. We suggest that a dysfunction of the sex determining system, which controls the anlagen of the androgenic glands during development, caused the partial male-like phenotype of this Marmorkrebs specimen. The application of this organism for investigations of sex determination and differentiation is recommended.
我们描述了一种大理石纹螯虾的雌雄同体标本，它是唯一一种全雌性种群的专性孤雌生殖淡水小龙虾。该个体是一只功能完全正常的雌性，具有类似雄性的第一腹肢。然而，它成功繁殖，后代是正常发育的孤雌生殖雌性，没有任何雄性特征的痕迹。文中讨论了淡水小龙虾，特别是原螯虾中异常性特征普遍罕见的情况。我们认为，性别决定系统功能失调，该系统在发育过程中控制着雄性腺原基，导致了这只大理石纹螯虾标本出现部分类似雄性的表型。建议将这种生物应用于性别决定和分化的研究。
