Reproductive Traits of Sandbird Octopus, Amphioctopus aegina (Gray, 1849) from Mandapam Coastal Waters (Palk Bay), Southeast Coast of India

Ignatius, Boby and Srinivasan, M and Balakrishnan, S (2011) Reproductive Traits of Sandbird Octopus, Amphioctopus aegina (Gray, 1849) from Mandapam Coastal Waters (Palk Bay), Southeast Coast of India. Ocean Science Journal, 46 (3). pp. 145-154.

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Abstract

The sandbird octopus Amphioctopus aegina (Gray, 1849) is one of the important octopod species in trawl catches in Mandapam waters (Palk Bay). The reproductive biology of this species from these waters was studied from October 2001 to September 2002. In the majority of months(Jan-June), the sex ratio was biased towards males. The ratios of males to females increased consistently with respect to weight Total weight at first maturity were 78.78g for females and 40.8 g for males. Four maturity stags were recognized for females and two for males. Maturation and spawning occur all year round, with a peak during October and another peak during January- February. In males, no definite seasonal changes were observed in gonadosomatic index (GSI) values. In females there were two peaks in GSI values during October and January-February. For individuals of a DML range of 67-85 mm fecundity varied between 2,962-8,820 oocytes. The average relative fecundity was estimated at 68 to 83 and the average number oocytes per gram of ovary were 488 to 539.

Item Type:	Article
Uncontrolled Keywords:	Amphioctopus aegina; maturation; spawning; fecundity; size at maturity
Subjects:	Molluscan Fisheries > Cephalopods
Divisions:	CMFRI-Kochi > Mariculture Division Subject Area > CMFRI > CMFRI-Kochi > Mariculture Division CMFRI-Kochi > Mariculture Division Subject Area > CMFRI-Kochi > Mariculture Division
Depositing User:	Arun Surendran
Date Deposited:	31 May 2014 03:57
Last Modified:	09 Sep 2015 15:59
URI:	http://eprints.cmfri.org.in/id/eprint/10094

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