Estimated production, catch per unit effort, biological aspects of tuna, skipjack, and small tuna in North Sumatra

Gussasta Levi Arnenda,Arief Wujdi,Roy Kurniawan,Fathur Rochman,E.S Kartamihardja,A Collins,S.M Bergmann,S.B Andi Omar,T Peristiwady,Alimuddin Alimuddin,C.P.H Simanjuntak,P.G Sasmita,Djumanto Djumanto,E Setyobudi,N Hubert,D.F Mokodongan

doi:10.1051/e3sconf/202132203003

Abstract

Tuna and like species resources are like other renewable resources. The level of exploitation of these resources dramatically affects their ability to maintain their numbers and abundance in the water. Fishery management policy should be conducted based on a scientific-based approach. This research aims to collect data related to tuna fisheries and the like, including data collection aspects of coaching, the composition of catches, and the biology of tuna catches in 2020. Research location in North Sumatra. The results showed that the estimated value of skipjack tuna (SKJ) of 232,823 tons, yellowfin tuna (YFT) of 23,682 tons, frigate tuna (FRI) is 40,949 tons, and Kawakawa (KAW) is 1,374 tons. SKJ, as of 6.149 samples, have length class 18-60 cmFL, CPUE highest in April and lowest in August. FRI of 1.619 samples with a lengthy class between 17-44 cmFL, CPUE highest in October and lowest in December. YFT of 1.060 samples with a lengthy class 18-60 cm, CPUE highest in April and lowest in March. Kawakawa of the 1.530 samples has length class 25-54 cm, with the highest CPUE in April and lowest in March and July.

Highlights

Indonesia is the second-largest country after China as a producer of capture fisheries products in the world with a total production of more than 6 million tons in 2014, with an average of about 4,7 tons/year (2003-2012) [1] The tuna, tunas, and skipjack (TTS) species group contributed 25 % or around 1,5 million tons in the same year
This study found that the composition of the catches of fishing vessels that landed at PPN Sibolga contained four species of tuna, skipjack, and small tuna (TCT)
The composition of the catch was dominated by skipjack tuna (Katsuwonus pelamis) (SKJ) of 50,11%, frigate tuna (Auxis thazard) (FRI) of 8,81%, yellowfin tuna (Thunnus albacares) (YFT) of 5,10%, and kawakawa (Euthynnus affinis) (KAW) by 0,30%

Summary

Introduction

Indonesia is the second-largest country after China as a producer of capture fisheries products in the world with a total production of more than 6 million tons in 2014, with an average of about 4,7 tons/year (2003-2012) [1] The tuna, tunas, and skipjack (TTS) species group contributed 25 % or around 1,5 million tons in the same year. This value is equivalent to 16 % of the total world tuna production.

Objectives

Methods

Results

Discussion

Conclusion