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Length weight relationship and diet composition of yellowfin tuna (Thunnus albacares) landed in Negombo Fishery Harbour, Sri Lanka.

Authors:

H. A. C. C. Perera ,

University of Kelaniya, Kelaniya, GQ 11600, LK
About H. A. C. C.

Department of Zoology and Environmental Management

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P. A. S. A. Weerasiri

Master of Business Administration and Master of Professional Accounting Holmes Institute, 185 Spring Street, Melbourne VIC3000, Melbourne, AU
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Abstract

Yellowfin tuna (Thunnus albacares) is the second most economically important tuna species in Sri Lanka. Present study was focused on the determination of length-weight relationship and analysis of stomach contents of yellowfin tuna landed in Negombo fishery harbour. A total of 174 stomachs of yellowfin tuna (Thunnus albacares) were analyzed. The total length range of the observed yellowfin tuna was 50-169 cm and weight range was 10-86.5 kg. The diet of yellowfin tuna comprised of a variety of food items such as fish (55%), squids (30%), crabs (6%), shrimps (8%) and others (1%) indicating that it is a non-selective predator. The observed length weight relationship for yellowfin tuna was W= 0.000104 TL2.6892.

How to Cite: Perera, H.A.C.C. and Weerasiri, P.A.S.A., 2020. Length weight relationship and diet composition of yellowfin tuna (Thunnus albacares) landed in Negombo Fishery Harbour, Sri Lanka.. Sri Lanka Journal of Aquatic Sciences, 25(2), pp.79–83. DOI: http://doi.org/10.4038/sljas.v25i2.7579
Published on 15 Sep 2020.
Peer Reviewed

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