Year: 2016, Issue: December

Spawning frequencies and breeding seasons of Cociella crocodila (Tilesius,1812) from Mangalore coast.
Author:
A. S. Mahesa Murthu, D. P. Rajesh, S. Benakappa, H. N. Anjanayappa, S. R. Somashekara and D. P. Prakash
Keyword:
Cociella crocodila, Breeding biology, Mangalore coast.
Maturation studies carried out on Cociella crocodila samples collected from commercial landings from October,2006 to May,2007 showed the dominance of male with male to female ratio of 1:0.98. The Gonado Somatic Index values ranged between 1.5386-4.8541 in male and in case of female, fluctuated between 1.93-40.82. The fecundity ranged from 9405-19384 eggs with an average of 13,252 eggs. The ova diameter ranged from 0.203-0.592 mm. Analysis of size at first maturity of Cociella crocodila, using cumulative frequency method showed that female attained first maturity at 205 mm (TL) while the male at 195 mm (TL). The logarithm relationship between fecundity, total length, body weight and ovary weight were also calculated.

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