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

H. A. C. C. Perera | Zendy; P. A. S. A. Weerasiri | Zendy

Open Access

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

Author(s) -

H. A. C. C. Perera,

P. A. S. A. Weerasiri

Publication year - 2020

Publication title -

sri lanka journal of aquatic sciences

Language(s) - English

Resource type - Journals

ISSN - 2424-7057

DOI - 10.4038/sljas.v25i2.7579

Subject(s) - yellowfin tuna , thunnus , tuna , fishery , biology , fish <actinopterygii>

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.

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