Nominal CPUE, Length Distribution and Condition Factor of Kawakawa (Euthynnus Affinis) in Indian Ocean

Kawakawa (Euthynnus affinis) one of the important catch for small-scale fisheries in Indonesia. This species is included in neritic tuna group that mostly utilized by using purse seine and gillnet. The objectives of this research are to investigate the Nominal CPUE, length distribution and condition factor of kawakawa. Data collection was conducted for 11 months from February to December 2019 in Aceh, West Sumatera, and Bengkulu (Indian Ocean). Total of 1,622 specimens were collected, measured (cmFL) and weighted (kg). CPUE analysis shows the fluctuations in each month with the highest CPUE value in August and the lowest in May. Length distribution ranged from 20 – 55 cmFL and weight ranged from 0,13 – 3,06 kg. Analysis of length-weight relationships showed the equation W = 0,0124L3,1079 with determination coefficient (R2) 0.9665. Growth pattern of kawakawa was positive allometric. The highest relative condition factor (Kn) occurred at upper limit of length class 21 cmFL with 1.25 and the lowest at 57 cmFL with 1.06. The condition factor was relatively stable with the highest value occurred on Desember with 1.265 and the lowest on April with 1.081. This fluctuated for small size group and decrease along with the length increase for the adult fish.