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Reproductive adaptation: a description of claspers of the Spadenose shark and Milk shark from Gujarat

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Relation http://eprints.cmfri.org.in/14718/
http://nopr.niscair.res.in/handle/123456789/55093
 
Title Reproductive adaptation: a description of claspers of the Spadenose shark and
Milk shark from Gujarat
 
Creator Dash, Swatipriyanka Sen
Kizhakudan, Shoba Joe
Zacharia, P U
Dash, Gyanaranjan
 
Subject Shark fisheries
Fish biology
Demersal Fisheries
 
Description 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.
 
Date 2020
 
Type Article
PeerReviewed
 
Format text
 
Language en
 
Identifier http://eprints.cmfri.org.in/14718/1/Indian%20Journal%20of%20Geo-Marine%20Sciences_2020_Swatipriyankasen%20Dash_Shark.pdf
Dash, Swatipriyanka Sen and Kizhakudan, Shoba Joe and Zacharia, P U and Dash, Gyanaranjan (2020) Reproductive adaptation: a description of claspers of the Spadenose shark and Milk shark from Gujarat. Indian Journal of Geo-Marine Sciences, 49 (7). pp. 1238-1241.