Reproduksi Ikan Amfidromus Bobosoh Bunaka gyrinoides (Bleeker 1853) di Sungai Cisolok, Sukabumi, Jawa Barat

Abstract

Ikan bobosoh atau Bunaka gyrinoides (Bleeker 1853) merupakan salah satu spesies ikan amfidromus air tawar dari famili Eleotridae. Meskipun ikan ini menarik, namun penelitian tentang ikan ini masih jarang dilakukan terutama tentang aspek reproduksinya. Oleh karena itu, penelitian ini difokuskan untuk menganalisis nisbah kelamin, musim pemijahan, pola pemijahan, dan potensi reproduksi ikan bobosoh di Sungai Cisolok, Palabuhanratu. Sampel ikan bobosoh diperoleh dari hasil tangkapan selama Desember 2020-November 2021 dengan menggunakan beberapa metode penangkapan, yakni electrofishing, jala lempar, pancing, dan liftnet. Ikan bobosoh yang terkoleksi selama penelitian 360 ekor yang terdiri atas 202 ekor ikan jantan dan 158 ekor ikan betina. Nisbah kelamin ikan bobosoh jantan dan betina di Sungai Cisolok tidak 1:1 (1:0,78). Ikan bobosoh memijah pada bulan Maret dan November, dengan puncak pemijahan terjadi pada bulan Maret. Ikan bobosoh memiliki pola pemijahan serentak dan dapat menghasilkan jumlah telur relatif sebanyak 246 hingga 1.073 butir/g bobot ikan (panjang 63-107 mm dan bobot 2,99-11,62 g).

The Greenback Gauvina, or Bunaka gyrinoides (Bleeker 1853), is a freshwater amphidromous fish from the Eleotridae family. Despite being a fascinating species, research on this fish is still rare especially about the reproductive aspect. Therefore, this study focuses on analyzing the sex ration, spawning season, spawning pattern, and reproductive potential of the greenback guavina in the Cisolok River, Palabuhanratu. Samples of the greenback guavina were collected between December 2020 and November 2021 using various fishing methods, including electrofishing, throwing nets, fishing rods, and lifts. During the study period, 360 greenback guavina were captured, with 202 of them identified as male and 158 as female. It was found that the sex ratio of the greenback guavina in the Cisolok River was not 1:1 (1:0,78). Greenback guavina usually spawns during March and November, with the highest spawning activity in March. This species shows a total spawning pattern and can produce a relative egg count of 246 to 1,073 eggs/g fish weight (63-107 mm in length and 2.99- 11.62 g in weight)