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首页> 外文期刊>African Journal of Marine Science >Gonadal cycle of the dwarf oyster Ostreola stentina from the south of the Gulf of Hammamet on the eastern coast of Tunisia
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Gonadal cycle of the dwarf oyster Ostreola stentina from the south of the Gulf of Hammamet on the eastern coast of Tunisia

机译：突尼斯东部沿海哈马马特湾以南的矮牡蛎角re的性腺周期

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摘要

The reproductive cycle of the dwarf oyster Ostreola stentina (Payraudeau 1826) at Monastir in the south of the Gulf of Hammamet on the east coast of Tunisia was studied using condition indices and histological techniques. The species was shown to be a protandric hermaphrodite. Whereas males dominated the small shell length categories (12.45-34.99 mm), females (21.00-47.16 mm) and hermaphroditic individuals (30.00-57.95 mm) become more predominant with increasing size, suggesting that individuals may undergo protandric development. The overall male to female ratio was 1.0:1.7. Gametogenic development begins in February-March for females and in September for males, and spawning occurs during April and July for females and December and July for males. There was a clear relationship between the gonadal condition index and gametogenic stage for both sexes. Values increased from zero in their early stage of development and peaked during ripe and spawning stages, before decreasing in the spent stage. However, the meat condition index did not show any statistical differences between gametogenic stages.
机译：使用条件指标和组织学技术研究了突尼斯东海岸哈马马特湾南部莫纳斯提尔的矮牡蛎牡蛎支架（Payraudeau 1826）的繁殖周期。该物种被证明是原变的雌雄同体。男性在小壳长类别（12.45-34.99 mm）中占主导地位，而雌性（21.00-47.16 mm）和雌雄同体个体（30.00-57.95 mm）随着大小的增加而变得更加占优势，这表明个体可能经历原生性发育。男女总比例为1.0：1.7。雌性和雌性在2月至3月之间开始进行配子发生，雄性在4月和7月间进行产卵，雄性则在12月和7月间发生。男女双方的性腺状况指数和配子发生阶段之间存在明显的关系。在开发的早期阶段，值从零开始增加，在成熟和产卵阶段达到峰值，而在用尽阶段则降低。但是，肉质状况指数在配子形成阶段之间未显示任何统计差异。

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