IDENTIFIKASI STOK IKAN KAKAP PUTIH (Lates calcarifer Bloch, 1790) MENGGUNAKAN KARAKTER MORFOMETRIK
DOI:
https://doi.org/10.20956/jipsp.v7i13.8570Abstract
Penelitian ini bertujuan untuk menganalisis diferensiasi morfologi yang terjadi di antara stok ikan kakap putih, barramundi (Lates calcarifer Bloch, 1790) di perairan pantai Kabupaten Bone, Wajo, Takalar, dan Kalimantan Utara. Diferensiasi karakter morfometrik dianalisis menggunakan fungsi dikskriminan. Hasil penelitian menunjukkan bahwa ikan kakap putih dari perairan Teluk Bone, Selat Makassar dan pesisir Pantai Sekatak Kalimantan Utara bersifat monophyletic. Aliran gen dan migrasi di antara populasi atau stok ikan kakap putih sangat terbatas atau hampir tidak ada. Stok ikan kakap putih di pesisir pantai Desa Akkotengeng Kabupaten Wajo dan stok di pesisir pantai dan daerah aliran sungai (DAS) Sungai Saro Kabupaten Takalar melakukan rekruitmen sendiri. Terdapat satu individu ikan kakap putih di perairan pantai Siwa Kabupaten Wajo dan Cenrana Kabupaten Bone (kedua stok berlokasi di Teluk Bone) yang memiliki fenotipe (morfologi) yang mirip dengan ikan kakap putih di perairan pantai Bulungan Kalimantan Utara. Analisis kontribusi 15 karakter morfometrik terhadap fungsi kanonik menunjukkan bahwa karakter yang menjadi penciri di antara stok adalah tinggi badan, caudal peduncle, dan diameter mata. Hasil discriminant function analysis (DFA) menunjukkan bahwa terdapat tiga populasi lokal yang signifikan berbeda secara fenotipe, sehingga dalam pengelolaannya dibutuhkan manajemen yang berbeda.
Kata kunci: Asian seabass, barramundi, karakter morfometrik, Lates calcarifer
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