Fish catches diversity of the glass eel fishery in Cikaso and Cimandiri estuaries, Sukabumi, Indonesia

Abstract

Cikaso and Cimandiri estuaries are well known as the central area of glass eel fisheries in Sukabumi Regency. Local fishermen catch glass eels using two main fishing gears, namely traps and lift nets. Although both fishing gears' target operation is glass eels, many other fish species are also caught as bycatch. The present study aimed to identify glass eels and bycatch ichthyofauna in glass eel fisheries of the Cikaso and Cimandiri estuaries, Sukabumi. The research was carried out monthly from November 2020 to January 2021. Glass eels fishing gears collected a total of 21 fish species belonging to 15 families in both estuaries. According to the percentage ano-dorsal length measurement to total length (AD/TL), 3 species of glass eel were identified, i.e. Anguilla bicolor bicolor, A. nebulosa, and A. marmorata. These three species were the most abundant fish catches in both estuaries. More than 18 bycatch ichthyofauna were recorded and most of them are economically important fish, such as Ambassidae, Eleotridae, Engraulidae, Gobiidae, and Polinemidae. To sustain fishery management, the recording bycatch from glass eel fishery in the Cikaso and Cimandiri estuaries is necessary to be done regularly because they contribute to fishing mortality.

Distribution, abundance, and species composition of fish larvae and juveniles of Gobiidae in the Cimaja estuary, Palabuhanratu, Indonesia

“…A lift net with a 0.2 mm mesh size was used to sample larvae and juveniles of amphidromous gobies [10,13]. Sampling was performed in daylight and nighttime during high tides.…”

Temporal variation in abundance of bully sleepers (Pisces: Eleotridae) larvae and juveniles in Cisolok Estuary, Palabuhanratu Bay, Indonesia

“…This gear is a kind of lift net with a net length and width of 1 m 2 . The net material is made of fine waring (polyethylene) with a mesh diameter of 0.25 mm [10,11]. The fishing device is set in a position blocking the current.…”

“…Only one species was found during the study period, namely Bunaka gyrinoides. A total of 7,353 larvae and juveniles of B. gyrinoides were captured, consisting of flexion (45 individuals; 4-5.9 mm BL), postflexion (6,887;(6)(7)(8)(9)(10)(11) and early juvenile (441;. Postflexion larvae were the most abundant specimens, contributing 88.4-95.5%; 96-81.1%, 94.2-97.8% to the total catches in December, January, and February.…”

Sintasan Pasca Penangkapan Hasil Tangkapan Perikanan Glass Eels Di Estuari Sungai Cikaso, Sukabumi

“…Masyarakat setempat umumnya menggunakan dua alat tangkap dalam melakukan penangkapan glass eels yakni bubu (trap) dan sirib (lift net). Pada pengoperasiannya, kedua alat tangkap ini diketahui juga memperoleh berbagai hasil tangkapan sampingan (Annida et al, 2021).…”

“…Kedua alat tangkap dioperasikan pada malam hari selama tiga jam durasi pasang. Waktu pasang ditetapkan nelayan sebagai waktu penangkapan (Annida et al, 2021). Glass eels diketahui melakukan proses rekrutmen dengan masuk ke perairan tawar melalui muara sungai dengan bantuan pasang air laut (Cresci et al, 2019;Cresci, 2020).…”