Aspek Reproduksi Ikan Nyalian (Barbodes binotatus Valenciennes, 1842) di Danau Tamblingan

The reproduction aspects of spotted barb (Barbodes binotatus Valenciennes, 1842) in Tamblingan Lake are not yet known, so that efforts to manage the resources of this fish cannot be carried out. This study aims to determine the reproduction aspects of spotted barb in Tamblingan Lake. Sampling was conducted from January to June 2019. This research used descriptive and quantitative methods. Purposive sampling method used for catched the spotted barb at five stations. Sampling was done once in a month. The fish were collected used gill net with a mesh size of 0.5; 1.0; 1.5; 2.0; 2.5; 3.0 cm. The samples of spotted barb that found during data collection were 208 individuals. The results showed that the ratio between the sex ratio of male and female spotted barb was 1.17: 1 which indicates a balanced sex ratio, with the gonad maturity stage of male fish more varied (I-IV) than female fish (III and IV). The highest average gonadosomatic index (male and female) was found in March and the lowest in January. The fecundity ranges from 57-23,897 eggs.Aspek reproduksi ikan nyalian (Barbodes binotatus Valenciennes, 1842) di Danau Tamblingan belum diketahui, sehingga upaya pengelolaan sumber daya ikan ini belum dapat dilakukan. Penelitian ini bertujuan untuk mengetahui aspek reproduksi ikan nyalian di Danau Tamblingan. Sampling dilakukan kurun waktu Januari-Juni 2019. Penelitian ini menggunakan metode deskriptif dan kuantitatif. Pengambilan sampel menggunakan metode purposive sampling di lima titik stasiun. Pengambilan sampel dilakukan satu kali pada setiap bulan. Alat tangkap yang digunakan adalah jaring insang yang memiliki ukuran mata jaring 0,5; 1,0; 1,5; 2,0; 2,5; 3,0 cm. Sampel ikan nyalian yang ditemukan selama pengambilan data sebanyak 208 individu. Hasil penelitian menunjukkan bahwa perbandingan antara nisbah kelamin ikan nyalian jantan dan betina yaitu 1,17:1 yang menunjukkan nisbah kelamin seimbang. Tingkat kematangan gonad (TKG) ikan jantan lebih bervariasi (I-IV), dibandingkan ikan betinanya (III dan IV). Rata-rata indeks kematangan gonad (IKG) tertinggi (jantan dan betina) ditemukan pada bulan Maret dan terendah pada bulan Januari. Fekunditasnya berkisar antara 57-23.897 butir