Wijayanto, Dian and Nugroho, Ristiawan Agung and Kurohman, Faik and Nursanto, Didik Budi (2023) Effect of low salinity and fresh water media on growth, survival and BCR in TGGG hybrid grouper (♀ tiger grouper × ♂ giant grouper) culture. Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society, 16 (1). pp. 465-473. ISSN 1844-9166

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Abstract

Cultivation of the TGGG hybrid grouper species, locally known as 'cantang,' has been
developed in Indonesia and is typically cultivated in seawater or brackish water ponds. This research
investigated the feasibility of cultivating the TGGG hybrid grouper that is a crossbreed between the tiger
grouper (Epinephelus fuscoguttatus) and the giant grouper (E. lanceolatus) in low-salinity water media,
including freshwater (0 ppt). The research was conducted for 40 days using fish fingerlings with an
average weight of 12.99 g (±0.65 g) reared in plastic tubs containing 17 fish per tube. Three treatments
with two repetitions were performed: treatment A used media with a salinity of 10 ppt, treatment B with
a salinity of 5 ppt, and treatment C with a salinity of 0 ppt. The effects of the treatments on weight
growth rate (WGR), specific growth rate (SGR), survival rate (SR), feed conversion ratio (FCR), and
benefit cost ratio (BCR) were examined. The results showed that the salinity treatment had a significant
effect on the fish's growth (WGR and SGR), FCR, and BCR, although statistically, there was no significant
difference between treatments A and B. The modelling results indicated that the optimal salinity ranged
between 7.33 and 7.93 ppt for SGR, SR, BCR, and WGR. These results suggest that the TGGG hybrid
grouper can be reared at low salinity, but not at 0 ppt.

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