Impact of El Nino on changes in fish migration in the Tropical East Pacific Ocean Region

M Janib Achmad, Satria Krida Nugraha

Abstract


El Nino adalah salah satu fenomena yang berdampak pada perubahan suhu laut. Di wilayah Pasifik Timur Tropis (TEP), El Nino ditandai oleh suhu permukaan laut yang tinggi di wilayah tersebut. Ini memiliki dampak yang berbeda pada organisme laut di wilayah TEP, terutama pada ikan karang dan pelagis. Pelagis yang diteliti selama El Nino 1972/73, 1982/83 dan 1997/98 memiliki kecenderungan untuk bermigrasi ke daerah yang lebih dingin. Beberapa jenis pelagis memiliki tingkat reproduksi yang berbeda selama El Nino. Sementara ikan karang, yang diketahui memiliki area tetap, memiliki respons berbeda selama terjadi El Nino. Karena mereka tidak dapat bermigrasi, ikan karang perlu beradaptasi pada perubahan suhu selama El Nino. Akibatnya, selama El Nino jumlah populasiikan karang menurun, ini disebabkan oleh faktor reproduksi yang rendah dan jumlah makanan yang terbatas.

 

Kata Kunci : El Nino, Ikan karang, Pelagis, Tropical Eastern Pasific


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DOI: http://dx.doi.org/10.33387/jikk.v4i1.3355

DOI (332-341 (Bahasa Indonesia)): http://dx.doi.org/10.33387/jikk.v4i1.3355.g2209

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