Electronic Theses and Dissertation

Poropuntius tawarensis atau secara lokal dikenal dengan ikan kawan merupakan ikan endemik air tawar di Danau Laut Tawar, Aceh Tengah, Indonesia. Ikan kawan (P. tawarensis) hanya didapatkan dari ketersediaan di alam. Ikan ini~ salah satu species yang paling penting secara komersial di danau tersebut, sehingga adanya peningkatan usaha penangkapan ikan ini. Penelitian ini bertujuan untuk menganalisa pola pertumbuhan, faktor kondisi dan aspek biologi reproduksi ikan kawan. Pengambilan sampel dilakukan pada bulan Oktober-Desember 2021 di Danau Laut Tawar, Kabupaten Aceh Tengah. Penanganan sampel dilakukan di Laboratorium Kesehatan Ikan dan Lingkungan BBI Lukup Badak Dinas Perikanan Kabupaten Aceh Tengah. Pengamatan sampel gonad ikan dilakukan di Laboratorium Genetika dan Biodiversitas Akuatik Fakultas Kelautan dan Perikanan, Universitas Syiah Kuala. Analisa yang diperhatikan dalam biologi reproduksi dalam penelitian ini antara lain: distribusi frekuensi panjang, hubungan panjang berat, faktor kondisi, rasio kelamin, tingkat kematangan gonad, indeks kematangan gonad, ukuran pertama kali matang gonad, fekunditas, serta hubungan fekunditas dengan berat tubuh dan hubungan fekunditas dengan berat gonad. Sampel ikan yang didapat sebanyak 508 ekor, dengan ukuran panjang ikan berkisar 49,9-121,6 mm dan berat ikan berkisar 1,68-24,50 gram. Pola pertumbuhan ikan kawan merupakan isometrik dengan nilai b= 3,023. Nilai faktor kondisi ikan kawan berkisar antara 1,18-1,28. Rasio kelamin ikan kawan tidak seimbang dengan perbandingan jantan:betina adalah 1:2,8. Dengan kisaran IKG ikan jantan sebesar 2,7 %, dan ikan betina sebesar 9,8 %. Hasil penelitian didominasi oleh ikan yang memiliki tingkat kematangan gonad (TKG) IV. Ikan kawan memiliki nilai fekunditas antara 313-11.746 butir.
Kata kunci: Poropuntius tawarensis, Isometrik, Fekunditas

Poropuntius tawarensis or locally known as Kawan fish is a freshwater endemic fish in Laut Tawar Lake, Central Aceh, Indonesia. Kawan fish (P. tawarensis) was only obtained from availability in nature. This fish~ species is one of the most commercially important fish in the lake, so there is an increase in fishing effort. This study aims to analyze the growth pattern, condition factors and aspects of the reproductive biology of Kawan fish. Sampling was carried out in October-December 2021 in Laut Tawar Lake, Central Aceh Regency. Sample handling was carried out at the BBI Lukup Badak Fish and Environmental Health Laboratory, Fisheries Service Office, Central Aceh Regency. Observation of fish gonad samples was carried out at the Genetics and Aquatic Biodiversity Laboratory, Faculty of Marine and Fisheries, Syiah Kuala University. The analyzes considered in reproductive biology in this study include: distribution of length frequency, relationship between length and weight, condition factors, sex ratio, gonadal maturity stage, gonadal somatic index, length at first mature, fecundity, and the relationship between fecundity and body weight and the relationship between fecundity and gonadal weight. Fish samples obtained were 508 fish, with fish length ranging from 49.9-121.6 mm and fish weight ranging from 1.68-24.50 grams. The growth pattern of Kawan fish is isometric with a value of b= 3.023. The condition factor value of Kawan's fish ranged from 1.18-1.28. The sex ratio of Kawan fish is not balanced with the male:female ratio is 1:2.8. With a range of GSI male fish of 2.7%, and 9.8% of female fish. The results of the study were dominated by fish that had a gonadal maturity stage (GMS) IV. Kawan fish has a fecundity value between 313-11,746 grains. Keywords: Poropuntius tawarensis, Isometric, Fecundity