Electronic Theses and Dissertation

Ikan kerapu merupakan ikan yang memiliki nilai ekonomis di indonesia, salah satunya adalah ikan kerapu v. albimarginata atau dikenal dengan kerapu ekor cabang. namun, ikan ini terus dieksploitasi dan dikhawatirkan akan mengalami overfishing. salah satu cara untuk mengantisipasi ikan kerapu v. albimarginata mengalami over fishing ialah dengan membudidayakan ikan tersebut. namun, penelitian tentang ikan kerapu ini sangat terbatas termasuk morfometrik, meristik dan bioreproduksinya. penelitian ini bertujuan untuk menganalisis karakter morfometrik, meristik dan bioreproduksi ikan kerapu v. albimarginata yang terdapat di selat benggala. pengambilan sampel dilakukan dari bulan april 2022 sampai agustus 2022 di pelabuhan perikanan samudra (pps) lampulo, kecamatan kuta alam, kota banda aceh. sampel diperoleh dari nelayan yang menangkap ikan di selat benggala. sampel kemudian dianalisis di laboratorium genetika dan biodiversitas akuatik, fakultas kelautan dan perikanan, universitas syiah kuala. sebanyak 30 ekor ikan dianalisis karakter morfometrik, meristik, hubungan panjang-berat, sebaran ukuran panjang, rasio kelamin, tingkat kematangan gonad, ukuran pertama kali matang gonad, dan fekunditasnya. pengukuran morfometrik dilakukan dengan menggunakan dua metode, yaitu metode tradisional dan truss network. hasil penelitian didapatkan bahwa ukuran panjang total ikan v. albimarginata yang tertangkap di selat benggala berkisar antara 187-422 mm (rata-rata 298±57 mm). pola pertumbuhan v. albimarginata didapati allometrik negatif. rasio kelamin v. albimarginata berada dalam kondisi seimbang (1:1) (hasil uji khi kuadrat). tingkat kematangan gonad didominasi oleh tkg iii sebanyak 34,48%, dengan puncak pemijahan diperkirakan pada bulan juni. indeks kematangan gonad (ikg) v. albimarginata berkisar antara 0,01%-3,47%, dengan ukuran pertama kali matang gonad 243 mm. fekunditas total yang dihasilkan ikan v. albimarginata berkisar antara 28.771-269.096 butir telur dengan hasil analisis regresi linear menunjukkan 84% jumlah fekunditas dipengaruhi oleh jumlah berat gonad. kata kunci: hubungan panjang-berat, tkg, fekunditas

Grouper is a fish that has economic value in Indonesia, one of which is V. albimarginata grouper, or known as lyretail grouper. However, this fish continues to be exploited and it is feared that it will experience overfishing. Cultivating the fish is one way to anticipate V. albimarginata grouper experiencing overfishing. However, research on grouper is very limited including its morphometric, meristic, and bioreproduction. This study aims to analyze the morphometric, meristic, and bioreproductive characteristics of V. albimarginata grouper found in the Bengal Strait. Sampling was carried out from April 2022 to August 2022 at the Samudra Fishing Port (PPS) Lampulo, Kuta Alam District, Banda Aceh City. Samples were obtained from fishermen who fish in the Bengal Strait. The samples were then analyzed at the Aquatic Genetics and Biodiversity Laboratory, Faculty of Marine and Fisheries, Syiah Kuala University. A total of 30 fish were analyzed for morphometric, meristic, length-weight relationships, length distribution, sex ratio, gonad maturity rate, gonad first maturity size, and fecundity. Morphometric measurements are carried out using two methods, namely the traditional method and the truss network. The results found that the total length of V. albimarginata fish caught in the Bengal Strait ranged from 187-422 mm (average 298±57 mm). The growth pattern of V. albimarginata was found to be allometric negative. The sex ratio of V. albimarginata is balanced (1:1) (Khi squared test results). The gonadal maturity rate is dominated by TKG III at 34.48%, with the peak of spawning expected in June. The gonadal maturity index (IKG) of V. albimarginata ranges from 0.01%-3.47%, with a first-time gonadal maturity size of 243 mm. The total fecundity produced by V. albimarginata fish ranged from 28,771-269,096 eggs with the results of linear regression analysis showing that 84% of fecundity was influenced by the number of gonadal weights. Keywords: length-weight relationship, TKG, fecundity