1. Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, College of Animal Science, Yangtze University, Jingzhou 434025, China; 2. Jiangxi Academy of Agricultural Sciences, Nanchang 330008, China; 3. Hubei Fisheries Industrial Technology Research Institute, Jingzhou 434026, China
Abstract:Juvenile red swamp crayfish Procambarus clarkii with body weight of (3.11±0.10) g was reared in a 120 cm×60 cm×20 cm aquarium at stocking density of 14 individuals/m2 (group L), 28 individuals/m2 (group M), and 42 individuals/m2 (group H) at water temperature of (25±1) ℃ for 8 weeks in order to investigate the effects of different stocking densities on the growth, feeding, digestive enzyme activity and non-specific immunity of juvenile red swamp crayfish. The survival rate of the crayfish was found to be decreased with the increase in stocking density. There were significantly higher specific growth rate (1.82±0.12)%/d and body weight gain rate (196.73±0.76)% in group M than those in the other two groups (P<0.05). The positive correlation between feeding rate and stocking density was observed in each group, higher feeding intake rate in group H than that in group L and group M. There were significantly higher activities of digestive enzymes in group M than those in group L (P<0.05), without significantly different from those in group H (P>0.05). The non-specific immunity of the crayfish was significantly affected by stoking density (P<0.05), significantly better in group M than that in the other two groups. The findings indicate that the optimal stocking density is 28 individuals/m2 in juvenile red swamp crayfish culture under the experimental conditions.
[1]Oficialdegui F J, Clavero M, Snchez M I, et al. Unravelling the global invasion routes of a worldwide invader, the red swamp crayfish (Procambarus clarkii)[J]. Freshwater Biology,2019,64(8):1382-1400. [2]Castillo-Vargasmachuca S, Ponce-Palafox J T, García-Ulloa M, et al. Effect of stocking density on growth performance and yield of subadult Pacific red snapper cultured in floating sea cages[J].North American Journal of Aquaculture,2012,74(3):413-418. [3]Bolasina S N, Tagawa M, Yamashita Y, et al. Effect of stocking density on growth, digestive enzyme activity and cortisol level in larvae and juveniles of Japanese flounder, Paralichthys olivaceus[J].Aquaculture,2006,259(1/2/3/4):432-443. [4]宋光同,丁凤琴,陈静,等.亲虾规格、隐蔽物、光照度及密度对克氏原螯虾繁殖效果的影响[J].水产科学,2012,31(9):549-553. [5]Naranjo-Pramo J, Hernandez-Llamas A, Villarreal H. Effect of stocking density on growth, survival and yield of juvenile redclaw crayfish Cherax quadricarinatus (Decapoda: Parastacidae) in gravel-lined commercial nursery ponds[J]. Aquaculture,2004,242(1/2/3/4):197-206. [6]张龙岗,孟庆磊,刘羽清,等.养殖密度对克氏原螯虾大规格苗种生长和存活的影响[J].河北渔业,2017(5):12-14. [7]高帅,阮国良,杨代勤.养殖密度对克氏原螯虾摄食节律的影响[J].长江大学学报(自然科学版),2016,13(15):38-41. [8]刘国兴,李玲,彭刚,等.放养密度对克氏原螯虾生长和养殖水质的影响[J].江西农业学报,2014,26(4):86-89, 93. [9]侯文杰,臧维玲,刘永士,等.室内凡纳滨对虾养殖密度对水质与生长的影响[J].安徽农业大学学报,2010,37(2):284-289. [10]方卉,陈友明,赵雯莹,等.隐蔽所对不同生长阶段克氏原螯虾生长的影响[J].水产科学,2019,38(4):533-538. [11]廖锐,区又君,勾效伟.养殖密度对鱼类福利影响的研究进展Ⅰ.死亡率、生长、摄食以及应激反应[J]. 南方水产,2006,2(6):76-80. [12]Mazlum Y. Stocking density affects the growth, survival, and cheliped injuries of third instars of narrow-clawed crayfish, Astacus leptodactylus Eschscholtz, 1823 juveniles[J]. Crustaceana,2007,80(7):803-815. [13]Zheng J B, Mao Y, Su Y Q, et al. Effects of stocking density on the survival,growth and physical injury of Marsupenaeus japonicus juveniles in a flowing water aquaculture system[J].Aquaculture Research,2020,51(4):1500-1506. [14]Daly B, Swingle J S, Eckert G L. Effects of diet, stocking density, and substrate on survival and growth of hatchery-cultured red king crab (Paralithodes camtschaticus) juveniles in Alaska, USA[J].Aquaculture,2009,293(1):68-73. [15]Williams A S, Davis D A, Arnold C R. Density-dependent growth and survival of Penaeus setiferus and Penaeus vannamei in a semi-closed recirculating system[J].Journal of the World Aquaculture Society,1996,27(1):107-112. [16]肖鸣鹤,肖英平,吴志强,等.养殖密度对克氏原螯虾幼虾生长、消化酶活力和生理生化指标的影响[J].水产学报,2012,36(7):1088-1093. [17]姚兴南,卓齐辉,陆伟强,等.不同养殖密度对池塘拟穴青蟹生长的影响[J].海南大学学报(自然科学版),2018,36(1):26-31. [18]张天时,孔杰,刘萍,等.饵料和养殖密度对中国对虾幼虾生长及存活率的影响[J].海洋水产研究,2008,29(3):41-47. [19]肖英平,吴志强,胡向萍,等.克氏原螯虾幼体发育时期消化酶活力及氨基酸含量研究[J].淡水渔业,2009,39(1):41-44. [20]邓梦颖,吴志强,肖英平,等.养殖密度对克氏原螯虾幼虾生长、摄食和饵料利用影响[J].淡水渔业,2010,40(3):13-17. [21]Van Tol A, Van Gent T, Scheek L M, et al. Lipoprotein structure and metabolism during progression and regression of atherosclerosis in pigs fed with fish oil-derived fatty acids[J].Advances in Experimental Medicine and Biology,1991,285:417-421. [22]陈勇.饲养密度对克氏原螯虾成活率和肝胰腺三种免疫酶的影响[J].湖北农业科学,2016,55(16):4237-4240. [23]Mck A, Peters G. Lysozyme activity in rainbow trout, Oncorhynchus mykiss (Walbaum),stressed by handling, transport and water pollution[J].Journal of Fish Biology,1990,37(6):873-885. [24]陈勇.饲养密度对克氏原螯虾生长和成活率的影响[J].安徽农业大学学报,2016,43(1):37-41. [25]王天神,周鑫,赵朝阳,等.不同温度条件下克氏原螯虾免疫酶活性变化[J].江苏农业科学,2012,40(12):239-241. [26]吴宗凡,时旭,程果锋,等.养殖密度对温室湿地循环水系统中鲫生长、生理及免疫指标的影响[J].南方水产科学,2014,10(5):39-44. [27]陈海刚,马胜伟,林钦,等.氯化三丁基锡对黑鲷鳃和肝组织SOD、MDA和GPx的影响[J].南方水产,2009,5(2):23-27. [28]于赫男.环境胁迫对罗氏沼虾和凡纳滨对虾行为、生长及生理活动的影响[D].广州:暨南大学,2007.