Analisis Sebaran Spasial dan Temporal Daerah Penangkapan Ikan Layang (Decapterus spp.) di Utara Laut Jawa Tahun 2019–2022

Abstract

WIDIA AYU LESTARI. Analisis Sebaran Spasial dan Temporal Daerah Penangkapan Ikan Layang (Decapterus spp.) di Utara Laut Jawa Tahun 2019 2022. Dibimbing oleh VINCENTIUS P. SIREGAR dan JONSON LUMBAN GAOL.

Ikan layang (Decapterus spp.) merupakan ikan pelagis kecil bernilai ekonomis penting yang daerah penangkapannya dipengaruhi oleh dinamika kondisi oseanografi. Penelitian ini bertujuan menganalisis sebaran spasial daerah penangkapan ikan layang berdasarkan salinitas, SPL, dan klorofil-a, serta hubungan temporal antara parameter oseanografi dan produktivitas penangkapan. Data oseanografi diperoleh dari Copernicus Marine Service dan Aqua MODIS, sedangkan data perikanan berasal dari logbook PPN Pekalongan periode 2019 2022. Data dianalisis secara spasial dan menggunakan analisis korelasi silang. Hasil penelitian menunjukkan bahwa daerah penangkapan ikan layang mengalami pergeseran antar musim mengikuti dinamika oseanografi, sedangkan salinitas memiliki hubungan temporal yang relatif paling kuat terhadap CPUE dibandingkan SPL dan klorofil-a, meskipun seluruh hubungan belum signifikan secara statistik. Perubahan kondisi oseanografi tersebut berkaitan dengan dinamika daerah penangkapan dan produktivitas ikan layang di utara Laut Jawa.

Kata kunci: CPUE, daerah penangkapan ikan, ikan layang, korelasi silang, parameter oseanografi.

WIDIA AYU LESTARI. Spatial and Temporal Analysis of Scad (Decapterus spp.) Fishing Grounds in the Northern Java Sea during 2019–2022. Supervised by VINCENTIUS P. SIREGAR and JONSON LUMBAN GAOL.

Scad (Decapterus spp.) is an economically important small pelagic fish whose fishing grounds are influenced by oceanographic dynamics. This study aimed to analyze the spatial distribution of scad fishing grounds based on salinity, SST, and chlorophyll-a, as well as the temporal relationship between oceanographic parameters and fishing productivity. Oceanographic data were obtained from the Copernicus Marine Service and Aqua MODIS, while fisheries data were collected from the fishing logbooks of Pekalongan National Fishing Port (PPN Pekalongan) for the 2019–2022 period. The data were analyzed using spatial analysis and cross correlation analysis. The results showed that the distribution of scad fishing grounds shifted seasonally following oceanographic dynamics. Salinity exhibited the strongest temporal relationship with CPUE compared with SST and chlorophyll-a, although none of the relationships were statistically significant. These findings indicate that changes in oceanographic conditions are associated with the dynamics of fishing grounds and scad fishing productivity in the northern Java Sea.

Keywords: catch per unit effort, cross-correlation analysis, fishing grounds, oceanographic parameters, scad