Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8959340 | Aquaculture Reports | 2018 | 5 Pages |
Abstract
The growth, gastric emptying time (GET), and oxygen consumption rate (OCR) of the commercially important freshwater mahseer, Tor tambroides, were evaluated under five temperatures (22â°C, 24â°C, 26â°C, 28â°C, and 30â°C) in triplicates with 15 fish per replication in a controlled laboratory condition. After 12 weeks, the body weight gain (BWG), specific growth rate (SGR), and daily growth rate (DGR) were measured. The highest BWG (7.25â±â1.14âg), SGR (0.71% ± 0.10% dayâ1), and DGR (4.70â±â0.20âg dayâ1) were observed at 30â°C, whereas the lowest BWG (3.16â±â0.90âg), SGR (0.30â±â0.05% dayâ1), and DGR (1.77â±â0.30âg dayâ1) were observed at 22â°C (P < 0.05). The fish were then slaughtered sequentially at different time intervals after initial feeding to obtain GET. Results showed that the shortest GET (10âh) was observed at 30â°C, whereas the longest (18âh) GET was at 22â°C. OCR was significantly high at 30â°C (5.5â±â0.53âmL O2Lâ1âhâ1) but low at 22â°C (1.55â±â0.23âmL O2 Lâ¹hâ1). Based on the temperature quotient (Q10), the optimum temperature range for the respiration rate was between 28â°C and 30â°C. The findings of this study suggest that T. tambroides should be cultured at 30â°C because this temperature facilitates fast GET and best OCR, which may contribute to their fast growth. In summary, these findings would be useful to increase the production of T. tambroides in captive environment.
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Authors
Simon Kumar Das, Noorashikin Md. Noor, Khor Si Kai, Quan Zhi Juan, Nur Syuhada Mohd Iskandar, Moumita De,