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Paper Information

Journal:   IRANIAN SCIENTIFIC FISHERIES JOURNAL   FALL 2010 , Volume 19 , Number 3; Page(s) 141 To 150.
 
Paper: 

ASSESSING THE OPTIMUM TEMPERATURE FOR SURVIVAL, GROWTH AND REPRODUCTION OF ADULT CASPIAN SEA PONTOGAMMARUS MAEOTICUS

 
 
Author(s):  YAVARI L., SHABANIPOUR N., HEIDARI B.*
 
* DEPARTMENT OF BIOLOGY, FACULTY OF SCIENCE, GUILAN UNIVERSITY, RASHT, IRAN
 
Abstract: 
This study was conducted to assess the effect of different levels of temperature on survival, growth and reproduction of adult Caspian Sea Pontogammarus maeoticus. Temperature effects were studied in 5 thermal levels (15, 20, 25, 30 and 35oC) where salinity was constant (7.1±0.2ppt). The sampling was made from Hassan-rud coastal area in Guilan province. The results showed that survival was maximum at 20oC (95.56%) with higher temperatures showing a significant descending trend in survival (P<0.05) in which all samples perishedonts" day at 35oC treatment. The number of produced brood followed a significant ascending trend from 15oC to 25oC treatments and reached its climax at 25oC (117.3±12.2 broods). The minimum value for produced brood was reported at 15oC 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±0.1 mm) and the first (1.77±0.06 mm) treatments, respectively. We suggest 25oC, 20oC and 30oC temperature treatments for producing the maximum brood per unit of time, the highest survival rate and the maximum growth, respectively. The temperature 25oC is defined as the best for aquaculture of pontogammarus as livefood of aquatic organisms.
 
Keyword(s): GROWTH, REPRODUCTION, SURVIVAL, TEMPERATURE, PONTOGAMMARUS, CASPIAN SEA
 
References: 
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