Electronic Theses and Dissertation

Ikan peres (osteochillus vittatus) merupakan salah satu ikan dominan di danau laut tawar dan hulu sungai peusangan, aceh tengah. namun populasinya semakin berkurang disebabkan oleh penangkapan yang berlebihan dan kerusakan lingkungan. penelitian ini bertujuan untuk menganalisis karakter reproduksi ikan peres (o.vittatus), meliputi karakter seksualitas ikan dan aspek reproduksi serta pola pertumbuhan ikan peres di hulu das peusangan. penelitian dilakukan pada juli 2023 sampai januari 2024 di hulu das peusangan. analisis terhadap ikan peres dilakukan di laboratorium kesehatan ikan, dinas perikanan kabupaten aceh tengah dan pengamatan telur sampel dilakukan di laboratorium genetik dan biodiversitas akuatik, fakultas kelautan dan perikanan, universitas syiah kuala. metode yang digunakan dalam pengambilan sampel ikan adalah metode random sampling yaitu pengambilan hasil tangkapan dari nelayan langsung ke lokasi. ikan peres dengan ukuran yang sama memiliki perbedaan antara ikan jantan dan ikan betina. ikan peres betina memiliki kepala yang lebih lebar dibandingkan ikan jantan. ikan peres jantan memiliki dasar sirip anus dibandingkan dengan ikan peres betina. data rasio kelamin yang didapatkan antara jantan dan betina yaitu 1:1 dan bersifat seimbang. tingkat kematangan gonad (tkg) didominasi oleh tkg iii sebanyak 14 ekor, tkg iv sebanyak 85. hasil analisa indeks kematangan gonad (ikg) ikan peres dari jumlah 121 total ikan yang diamati diketahui nilai ikg ikan betina bernilai rata-rata 19,02%, sedangkan nilai ikg jantan bernilai rata-rata 14,04%. ikan peres yang memiliki nilai fekunditas tertinggi didapatkan pada ikan tkg iv dengan ukuran panjang total 165,53 mm dengan berat 71,47 gr sebanyak 26.257 butir dengan berat gonad 24,2 gr. nilai fekunditas terendah ditemukan pada ikan dengan ukuran panjang total 151,65 mm dengan berat 49 gr sebanyak 2.558 butir dengan berat gonad 4,36 gr. hasil penelitian menunjukkan pola pertumbuhan ikan peres bersifat isometrik (b>3) dengan nilai b=3,0404. keywords: danau laut tawar, kematangan gonad, ostechillus, pertumbuhan.  

Peres fish (Osteochillus vittatus) is one of the dominant fish in Lake Laut Tawar and the Upper Peusangan River, Central Aceh. However, the population is decreasing due to overfishing and environmental damage. This research aims to analyze the reproductive characteristics of peres fish (O.vittatus), including the sexual characteristics of the fish and reproductive aspects as well as growth patterns of peres fish in the upper reaches of the Peusangan Watershed. The research was conducted from July 2023 to January 2024 in the Upper Peusangan Watershed. Analysis of peres fish was carried out at the Fish Health Laboratory, Fisheries Agency of Central Aceh and observation of egg samples was carried out at the Genetics and Aquatic Biodiversity Laboratory, Faculty of Marine and Fisheries, Syiah Kuala University. The method used in taking fish samples is the random sampling method, namely taking the catch from fishermen directly to the location. Pressed fish of the same size have differences between male and female fish. Female peres fish have wider heads than male fish. Male peres fish have an anal fin base compared to female peres fish. The sex ratio data obtained between males and females is 1:1 and is balanced. Gonad Maturity Level (TKG) was dominated by TKG III with 14 individuals, TKG IV with 85 individuals. The results of analysis of the Gonad Maturity Index (IKG) of peres fish from a total of 121 fish observed showed that the IKG value of female fish had an average value of 19,02%, while the IKG value of males had an average value of 14,04%. The peres fish which had the highest fecundity value was found in TKG IV fish with a total length of 165,53 mm with a weight of 71,47 grams, totaling 26.257 eggs with a gonad weight of 24,2 grams. The lowest fecundity value was found in fish with a total length of 151,65 mm and a weight of 49 grams with 2.558 eggs with a gonad weight of 4,36 grams. The results showed that the growth pattern of peres fish was isometric (b>3) with a value of b=3,0404. Keywords: Tawar Sea Lake, gonad maturity, Ostechillus, growth