Journal of Fisheries and Life Sciences

Author(s): Rajesh D. P., Anjanayappa H. N. and Benakappa S.

Abstract: The cleftbelly trevally (Atropus atropos) belonging to the family Carangidae is one of the important pelagic fish landed by trawlers along the Mangalore coast. Maturation studies carried was out on A. atropos samples collected from commercial landings during August 2015 to May 2017 showed the dominance of female with the male to female ratio of 1:1.16 & 1: 1.23. The Gonado Somatic Index values ranged between 0.43 to 2.09 in male and in case of the female, it fluctuated from 1.03 to 3.53 during the year 2015- 16 and 0.62 to 2.32 & 1.51 to 3.56 for male and female respectively during the year 2016-17. The fecundity ranged from 33,298 to 1, 88,675 eggs with an average of 94,083 eggs. The ova diameter ranged from 0.113 mm to 0.787 mm. From the maturity stage study it is clear that A. atropos is a prolonged spawner from September to December and March to May during both the years. The minimum size at sexual maturity was at 160-180 mm and 180- 200 mm (TL) for male and female respectively. The logarithmic relationship between fecundity, total length, body weight and ovary weight were also calculated.