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Food Composition of Frigate Tuna (Auxis thazard Lacepède,1800) Caught by Fisherman in West Sumatra Waters Saniyyah, Jauharah; Nofrita, Nofrita; Nurdin, Jabang
Jurnal Biologi Tropis Vol. 25 No. 1 (2025): Januari - Maret
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i1.8002

Abstract

Frigate tuna (Auxis thazard) is a pelagic and neritic fish resource that has economic value. Fish diet is one of the important information in monitoring the sustainability of fisheries resources in the future. This study aims to determine the composition of food and determine the Index of Preponderance of frigate tuna caught by fishermen in West Sumatra waters. The method used in this study was random sampling by taking 98 samples of frigate tuna obtained from the catch of fishermen in West Sumatra waters landed at the Air Bangis Fish Landing Center, West Pasaman Regency, and Gaung Fish Auction Site, Padang. The analysis used the Index of Preponderance to determine the main food, additional food, and complementary food. The results showed the composition of food in the stomach of frigate tuna consisted of 3 groups of organisms, namely zooplankton (61.04%), phytoplankton (31.82%), and pisces (7.13%). The main food of frigate tuna is zooplankton (62.10%), while the additional food are phytoplankton (27.73%), and pisces (10.16%). The availability of frigate tuna food in West Sumatra waters supports the sustainability of the frigate tuna population in these waters.
SEBARAN SPASIAL SUHU PERMUKAAN LAUT DAN KLOROFIL-a PADA DAERAH PENANGKAPAN IKAN CAKALANG (Katsuwonus pelamis) DI PERAIRAN SUMATERA BARAT Nofrita, Nofrita; Nurdin, Jabang; Fitra, Ramadani; Savitri, Vivi; Bintari, Andhani N.; Saniyyah, Jauharah; Sumartin, Harry
Jurnal Biologi Universitas Andalas Vol 12 No 1 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jbioua.12.1.66-72.2024

Abstract

West Sumatra waters is one of the potential fishing grounds for skipjack tuna. Oceanographic factors become the primary factors that limit the distribution and abundance of fish. This research aims to understand the spatial distribution of chlorophyll-a and sea surface temperature, and their utility for estimating potential fishing areas in the waters of West Sumatra. The data collection of fish catching area coordinates was carried out from June to July 2023. The sea surface temperature and chlorophyll-a data were downloaded from the website http://oceancolor.gsfc.nasa.gov. The research results found that the sea surface temperature in the waters of West Sumatra from June to July 2023 ranged between 27.9°C to 33.5°C, with an average of 30.25°C, while the chlorophyll-a ranged from 0.014 mg/m3 to 1.684 mg/m3, with an average value of 0.9515 mg/m3. The potential fishing areas for Skipjack Tuna identified during the research in the waters of West Sumatra were around Siberut Island in the Mentawai Islands, at the coordinates of 98°98’15.43"E and 01°97’32.35"S 99°27’67.95"E and 01°98’71.43"S.