A total of 90 one-month-old individuals were randomly selected to investigate the influence of salin-ity on the growth and allometric growth of juvenile Macrobrachium nipponense.These individuals were exposed to salinity 0,7 and 14.Their total length,body length,weight and abdominal length were measured on the 15th,30th,45th and 60th days after exposure.The differences in the growth rate of juvenile M.nipponense were ana-lyzed using the different salinity gradients.The results showed that juvenile M.nipponense could grow at salinity 0,7 and 14.Their average body length and weight gradually increased,respectively.The average body length and weight of juvenile M.nipponense at salinity 0 were considerably more significant than those at salinity 7 and 14 over the 60-day aquaculture procedure.In addition,there was a significant correlation between weight and total length,body length and abdominal length.The relative growth rate of body length and weight of juvenile M.nipponense at salinity 0 were significantly higher than those at salinity 7 and 14 on days 15th and 60th.There were significant differences in the growth rate of juvenile M.nipponense at the same and different salinities,and the differences in body length and weight increased with time.There was a significant difference in allometric growth between individuals in the fast-growing group(FG)and slow-growing group(SG).The relative growth rates of body length and weight of juvenile M.nipponense at salinity 0 were significantly higher than those at salinity 7 and 14.At salinity 7 and 14,the growth rates of SG were greatly delayed on day 15,but the relative rates of SG were significantly higher than those of FG at salinity 14 on day 60.In conclusion,different salinity gradients can substantially influence the growth rate of juvenile M.nipponense.Juvenile M.nipponense may grow faster in freshwater than at salinity 7 and 14.However,the difference in allometric growth between juvenile M.nipponense at salinity 14 is smaller than at salinity 0 and 7.
维普
万方数据
