Development of reproductive organs in the ivory shell Babylonia japonica: Observations from wild populations and laboratory-reared juveniles
Development of reproductive organs in the ivory shell Babylonia japonica: Observations from wild populations and laboratory-reared juveniles
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象牙甲巴比伦龟生殖器官的发育：野生种群和实验室饲养幼体的观察
DOI：
10.1016/j.marenvres.2013.07.003
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发表时间：
2014
影响因子：
3.3
通讯作者：
Shiraishi H
中科院分区：
文献类型：
--
作者：
Horiguchi T;Ohta Y;Hamada F;Urushitani H;Cho H.S;Shiraishi H
我们从组织学上观察了古巴贝（牙贝科）生殖道和性腺的正常分化和发育，以确定雄性型生殖器的形成是否模仿了前枝腹足类动物雄性生殖器的正常发育。我们使用野生捕获的2岁标本和实验室饲养的0-24个月的幼鱼。14个月前性腺分化不清楚，16个月后进展。两性在20月龄时生殖道完整，性腺成熟。然而，分化和发育在雌性比雄性发生得更早。生殖道发育先于性腺分化。雄性输精管的形态发生与雌雄同体的雌性相似。这些发现有助于了解腹足动物生殖道和性腺的形态发生，并有助于更深入地研究有机锡化合物如TBT和TPhT在雌性腹足动物不性发育中的作用模式。
We histologically examined normal differentiation and development of genital tract and gonad in the ivory shellBabyloniajaponica(Buccinidae) to determine whether the formation of male-type genitalia in imposex-exhibiting females mimics the normal development of male genitalia in prosobranch gastropods. We used a wild-caught 2-year-old specimen and laboratory-reared juveniles aged 0–24 months. Gonad differentiation was unclear before age 14 months, but progressed after 16 months. Both sexes had complete genital tract and mature gonad at 20 months. However, differentiation and development occurred earlier in females than in males. Development of genital tract preceded gonad differentiation. Vas deferens morphogenesis in males resembled that in imposex-exhibiting females. These findings help to understand the morphogenesis of genital tract and gonad in prosobranch gastropods and will contribute to more in-depth studies of the mode of action of organotin compounds such as TBT and TPhT in imposex development in female prosobranch gastropods.