Back to Search
Start Over
Effects of stocking density and water temperature on survival and growth of the juvenile Chinese mitten crab, Eriocheir sinensis, reared under laboratory conditions.
- Source :
-
Aquaculture . Oct2018, Vol. 495, p631-636. 6p. - Publication Year :
- 2018
-
Abstract
- The interaction effects of stocking density and water temperature on survival, molting, growth and feeding of juvenile crabs (0.91 ± 0.09 g) were studied in the laboratory. Stocking densities per m 2 were as follows: 14 (group D1), 42 (D3), 85 (D6), 128 (D9), 170 (D12) and 215 (D15), and water temperatures were 22 °C and 28 °C. The experiment was conducted in temperature-controlled recirculating rearing systems and lasted for 60 days. The results indicated that water temperature and stocking density have significant interaction effects on survival rate and molting frequency ( P < .05), but no significant interaction effects on body weight, specific growth rate (SGR), deformity rate, daily feed intake and feed conversion efficiency (FCE) ( P > .05). At 22 °C, the survival rate of group D1 was significantly higher than in other densities, while there was no significant difference in molting frequency between each density. At 28 °C, the survival rate of group D1 was similar to D3 and both were significantly higher than the other densities ( P < .05), molting frequency increased firstly and then decreased significantly with increasing stocking density ( P < .05). Water temperature had a significant influence on molting frequency at lower stocking densities (D1, D3 and D6), but not at higher densities, and only significantly influenced survival in group D12 ( P < .05). The deformity rate in group D12 at both temperatures was significantly higher than in other groups ( P < .05). Growth, body weight and SGR were significantly lower at high stocking densities (D12 and D15) than at lower densities ( P < .05). Moreover, water temperature had a significant positive effect on daily feed intake and the daily feed intake of group D1 was significantly higher than in other groups ( P < .05). In conclusion, a high stocking density limited molting increment (MI) of Eriocheir sinensis , and the results suggest an optimal stocking density of 42–85 crabs per m 2 . Our findings are relevant both for juvenile and adults E. sinensis aquaculture management in both ponds and lake stocking. [ABSTRACT FROM AUTHOR]
- Subjects :
- *CRABS
*WATER temperature
*MITTENS
*CHINESE mitten crab
*FEED utilization efficiency
Subjects
Details
- Language :
- English
- ISSN :
- 00448486
- Volume :
- 495
- Database :
- Academic Search Index
- Journal :
- Aquaculture
- Publication Type :
- Academic Journal
- Accession number :
- 130744150
- Full Text :
- https://doi.org/10.1016/j.aquaculture.2018.06.029