STUDIES ON THE DEVELOPMENTAL STAGES OF HAMMERHEAD SHARK SPHYRNA (EUSPHYRNA) BLOCHIl FROM THE GULF OF MANNAR


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Authors

  • K K Appukkuttan Central Marine Fisheries Research Institute Centre, Vizhinjain

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

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Author Biography

  • K K Appukkuttan, Central Marine Fisheries Research Institute Centre, Vizhinjain
    Central Marine Fisheries Research Institute Centre, Vizhinjain

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Issue

Vol. 25 No. 1 & 2 (1978)

Section

Articles

License

The copyright of the articles published in Indian Journal of Fisheries vests with the Indian Council of Agricultural Research, who has the right to enter into any agreement with any organization in India or abroad engaged in reprography, photocopying, storage and dissemination of information contained in these journals. The Council has no objection in using the material, provided the information is being utilized for academic purpose but not for commercial use. Due credit line should be given to the ICAR where information will be utilized.

How to Cite

Appukkuttan, K. K. (2011). STUDIES ON THE DEVELOPMENTAL STAGES OF HAMMERHEAD SHARK SPHYRNA (EUSPHYRNA) BLOCHIl FROM THE GULF OF MANNAR. Indian Journal of Fisheries, 25(1 & 2), 41-51. https://epubs.icar.org.in/index.php/IJF/article/view/12083