Studies on the developmental stages of hammerhead Shark Sphyrna (eusphyrna) blochil from The Gulf of Mannar

Appukuttan, K K (1978) Studies on the developmental stages of hammerhead Shark Sphyrna (eusphyrna) blochil from The Gulf of Mannar. Indian Journal of Fisheries, 25 (1&2). pp. 41-52.

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Abstract

Various stages of intra-uterine embryos of Sphyrna blocliii collected from the Gulf of Mannar are described and discussed. Uterine compartments are formed in this species which exhibit multipb pregnancy. An embryonic membrane store ch.amiber is present in each uterine comrpartment. The placenta of this species is of yolk-sac type and is formed at the stage in between 125 mm and 210 mm; yolk persist in the yolk-sac even when the placental connection is established with the mother. The placantation process observed in this species is almost similiar to that of S. tiburo and Carcltarhinus dussumieri. The probable gestation period and other details of placentation are discussed.

Item Type:Article
Uncontrolled Keywords:Shark fisheries; hammerhead Shark; Sphyrna (eusphyrna) blochil; Gulf of Mannar
Subjects:Demersal Fisheries > Shark fisheries
Divisions:CMFRI-Cochin > Marine Capture > Demersal Fisheries
ID Code:742
Deposited By:Dr. V Mohan
Deposited On:01 Jun 2010 12:25
Last Modified:01 Jun 2010 12:25

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