ABSTRACT
Mentawai Island District, particularly the Mentawai coastal region, is a potential fishery arrest area located in the part of the province of West Sumatera of Indonesia. Fisher shrimp in the Mentawai coastal area uses layered gill nets (Trammel nets) as a capture device. This research aims to know the oceanographic condition of the capture size, the product outcome, and the correlation of oceanographic parameters on the production of layered gill nets (Trammel net). The data used is temperature data, the degree of acidity (pH), salinity, the velocity of currents, depth, and data of the production of trammel net during 35 arrest trips. The oceanographic parameter in the area of arrest was 35. The release point of the layered gills (Trammel net) is as follows: Temperature ranges from 26 °C – 31 °C, Degree of acidity (pH) ranges from 7 – 9, salinity ranges from 25‰ – 35‰, current velocity range 0.13 m/s – 0.39 m/s, and the water depth ranges from 10 – 18 m. Variability of the production of gills mesh (Trammel net) is as follows: Wallago fish (Cynoglossus sp.), crab (Portunus sp.), Giant shrimp (Metapenaeus sp.), Scallop (Bufonaria sp.), ponyfishes (Leiognathus sp.), grilled fish (Nemipterus sp.), squid (Loligo sp.), and tiger shrimp (Penaeus sp.) with a total production of 302.2 kg. The correlation between the oceanographic parameters and the trammel net is the current velocity with a correlation value of 0.78 or a strong correlation. Depth of water with a correlation value of 0.56 or medium correlation. Temperature with a correlation value of 0.45 or medium correlation. Salinity with a correlation value of-0.23 or a low correlation. The degree of acidity (pH) with a correlation value of 0.002 or correlation is deficient.
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