Assessing the optimum temperature for survival, growth and reproduction of adult Caspian Sea Pontogammarus maeoticus
2010
L. Yavari | N. Shabanipor | B. Heydari
This study was conducted to assess the effect of different levels of temperature on survival, growth and reproduction of adult Caspian Sea Pontogammarus rnaeoticus. Temperature effects were studied in 5 thermal levels (15, 20, 25, 30 and 35°C) where salinity was constant (7.1±0.2ppt). The sampling was made from Hassan-nrud coastal area in Guilan province. The results showed that survival was maximum at 20CC (95.56%) with higher temperatures showing a significant descending trend in survival (P<0.05) in which all samples perished on I 8th day at 35°C treatment. The number of produced brood followed a significant ascending , trend from 15°C to 25°C treatments and reached its climax at 25°C (117.3+12.2 broods). The minimum value for produced brood was reported at 15°C treatment (21.3±2.4 broods). A significant persistent increment of growth rate was observed throughout all treatments (P<0.05) where the maximum and minimum values were observed for the final (5.76±0.1mm) and the first.....
显示更多 [+] 显示较少 [-]