Domestication and Length-Weight Relationship of Striped Snakehead Channa striata (Bloch)
The striped snakehead Channa striata is a freshwater fish with potential for aquaculture for consumption and as a source of nutraceutical products. A domestication program using seed (wild fry) from Sigi District in Central Sulawesi Province was initiated in 2013 to promote snakehead culture (grow-out and full-cycle) in this province. During the first two stages (fry to fingerling, fingerling to juvenile), cannibalism was the only observed cause of mortality. The main aim of the third stage was to evaluate locally available natural feeds for juvenile snakeheads over 180 mm in total length. Juvenile snakeheads were reared for 8 weeks in individual compartments in a concrete tank with 3 natural feed treatments (A: Golden apple snail, Pomacea canaliculata; B: Blue panchax, Aplocheilus panchax; C: Earth worms, Lumbricus rubellus) and 5 replicates per treatment. Feeding (11% of body weight) was twice daily. All juveniles remained in good health, however results showed that treatment B produced the highest relative growth in wet weight (21.8%), significantly different from A (11.8%) and C (9.5%). Over the 3-stage study period the length-weight relationship W = aLb was isometric (b=3), with considerable variation in individual growth patterns.