To ensure reproductive success, sharks have adapted several strategies. It was observed that male sharks of Scoliodon laticaudus Müller & Henle, 1838 and Rhizoprionodon acutus (Rüppell, 1837) landed along a few centres of Gujarat coast, have highly calcified claspers which morphologically resembled ossified webbed foot. The morphological and anatomical study revealed that the terminal end of the clasper has been modified into an umbrella like organ called rhipidion which probably ensures that the clasper stays within the cloaca of the female until the sperm is delivered. The landed sharks were all mature. This recent observation of catch of many mature individuals near the coastal waters throws some light on the breeding season and breeding area of sharks along Gujarat coast. With episodes of extinction and threat to the existence of several species of sharks today, this reproductive adaptation of the sharks might helps them to survive and sustain adverse conditions.

中文翻译：

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生殖适应：古吉拉特邦的Spadenose鲨鱼和Milk鲨鱼的claspers描述

为了确保繁殖成功，鲨鱼采用了多种策略。据观察，Scoliodon laticaudusMüller＆Henle（1838年）和Rhizoprionodon acutus的公鲨（Rüppell，1837年）降落在古吉拉特邦（Gujarat）海岸的几个中心，有高度钙化的claspers，形态上类似于僵化的蹼足。形态学和解剖学研究表明，已将精囊的末端修饰成伞状器官，称为“ rhipidion”，这可能确保精囊留在雌性泄殖腔内直至精子被释放。登陆的鲨鱼都成熟了。最近对沿海水域附近许多成熟个体的捕获情况的观察为古吉拉特邦沿岸鲨鱼的繁殖季节和繁殖区域提供了一些启示。随着当今物种的灭绝和威胁，鲨鱼的这种繁殖适应可能有助于它们生存并维持不利条件。