CAJ | 학술논문

设置低、中、高3个初始养殖密度(1 g/L、4 g/L、8 g/L),进行40 d的养殖实验,研究慢性拥挤胁迫对子二代中华鲟(Acipenser sinensis Gray)幼鱼生长、摄食及行为的影响.研究表明,慢性拥挤胁迫对子二代中华鲟的生长和摄食有显著影响,体质量、体质量特定生长率、体长特定生长率、日增重随着养殖密度的升高显著降低(P<0.05),实验结束时,高密度组肥满度显著低于中、低密度组(P<0.05);各实验组的摄食率随着养殖密度的升高而降低,饵料系数随着养殖密度的升高而升高(P<0.05).慢性拥挤胁迫对子二代中华鲟的行为也有显著的影响,随着养殖密度的增大,表现为呼吸频率、摆尾频率和游动速度显著加快等应急行为.研究结果表明高养殖密度对中华鲟的生长、摄食和行为存在显著的负面作用,不利于中华鲟幼鱼生长发育.
설치저、중、고3개초시양식밀도(1 g/L、4 g/L、8 g/L),진행40 d적양식실험,연구만성옹제협박대자이대중화심(Acipenser sinensis Gray)유어생장、섭식급행위적영향.연구표명,만성옹제협박대자이대중화심적생장화섭식유현저영향,체질량、체질량특정생장솔、체장특정생장솔、일증중수착양식밀도적승고현저강저(P<0.05),실험결속시,고밀도조비만도현저저우중、저밀도조(P<0.05);각실험조적섭식솔수착양식밀도적승고이강저,이료계수수착양식밀도적승고이승고(P<0.05).만성옹제협박대자이대중화심적행위야유현저적영향,수착양식밀도적증대,표현위호흡빈솔、파미빈솔화유동속도현저가쾌등응급행위.연구결과표명고양식밀도대중화심적생장、섭식화행위존재현저적부면작용,불리우중화심유어생장발육.
Chinese sturgeon(Acipenser sinensis) are an endangered anadromous species listed on the IUCN Red List. The species was characterized as a national level key protected animal of China in 1988 and fell under the protection of CITES Appendix II in 1998. Because of their perilous status, there is considerable interest in artifi-cial breeding and species conservation. To aid development of conservation breeding programs, we evaluated the effects of chronic crowding stress on growth, feeding, and behavior in F2 Chinese sturgeon. The fish were cultured at three stocking densities (low:1 g/L, medium:4 g/L, high:8 g/L) for 40 d to evaluate the influence of stocking density on growth, feeding and behavior. Density had a significant effect on growth and feeding. The body weight, growth efficiency, specific growth rate, and daily weight gain decreased significantly as stocking density increased. The feeding rate for the experimental groups also decreased as the stocking density increased and the feed conver-sion ratio increased as the stocking density increased. Density also had a significant effect on behavior because of chronic crowding stress. The breathing frequency, tail wagging frequency, and swimming distance increased with an increase in stocking density.