| Summary: | Drift gill net is a rectangular net. Knowledge of the measure of gear selectivity is very important for fisheries management and ecology. Common water fishing activities in South Kalimantan are generally carried out in rivers, swamps, lakes or reservoirs. Fish that are caught (target). This is due to the increasing intensity of fishing using drift gill nets with various mesh sizes, so that research on the selectivity of the nets is needed. Selectivity is the main factor in determining whether or not a fishing gear is good for the sustainability of fish resources. There are 4 types of fish found in Sungai Batang village using gill nets, namely the Cyprinidae family such as 51 Nilem fish (Osteocilus hasselti), Bagridae families such as Lundu (Mystus gulio) as many as 20 individuals and Senggiringan (Mystus nigreceps) as many as 1 tail, in the Nandidae family the fish obtained were 14 Patung fish (Pristolepis grootii), and the Pangasiidae family such as 1 fish (Pangasius macronema) with a total of 88 fish caught, with details on the mesh size 3 cm as many as 43 tails and mesh size 3.5 cm as many as 45 tails, the highest selectivity value at the 30 mm mesh size is 0.999 S (al) at a length distribution of 106-111 mm and the lowest is 0.212 at a length distribution of 124-129 whereas the value of selection of fishing gears drifting at 35 mm mesh size, the highest selection value is 0.999 S (bl) at 124-129 mm and the lowest is 0.076 S (bl) on the pan distribution, which is 100-105 mm.
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