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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.

sri lanka journal of aquatic sciences

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