Comparison of Growth and Ecological Adaptability of Five Populations of Red Swamp Crayfish Procambarus clarkii
ZOU Yufan1, WU Weijie1, BAI Zhiyi1,2,3, FENG Jianbin 1,2,3, WU Min4, JIANG Jun4, LI Jiale1,2,3
1. Key Laboratory of Genetic Resources for Freshwater Aquaculture and Fisheries, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai 201306, China; 2. Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai 201306, China; 3. Shanghai Collaborative Innovation Center for Cultivating Elite Breeds and Green-Culture of Aquaculture Animals, Shanghai Ocean University, Shanghai 201306, China; 4. Anhui Fishery Technology Extension Station, Hefei 230000, China
Abstract:Five breeding groups of red swamp crayfish Procambarus clarkii were introduced from Gehu, Xinghua, Jianhu, Wuhu and Jianli in Wuhu, Anhui province in 2020. The ecological adaptability of different populations of P. clarkii seedlings was compared under the same culture conditions in the same period of 2021, including growth, dispersal rate, crawling rate and desiccation stress. The results showed that Gehu populations[female: (7.52±0.15) cm, (13.4±0.85) g; male: (7.53±0.12) cm, (14.25±0.90) g]had the best growth performance for females and males in May in terms of body length and body weight. In May, except Wuhu population, there were significantly larger body length and body weight in the male than those in the female, with the best growth rate of body length (41%) and body weight (167%) in Jianhu group from March to April, and in Wuhu group (24% and 83%, respectively) from April to May. In May, there was larger proportion of female abdominal length to body length than that of male, with the maximal survival rate of 59.33% in the Gehu populations and the minimum of 50.67% in Jianli populations. The descending order of diffusion rate in pond was described as: Jianhu>Xinghua>Gehu>Jianli>Wuhu, with significantly better in Jianhu and Xinghua populations than that in the other three populations, and the fastest diffusion time of (291.67±25.43) s in Jianhu population, and the slowest diffusion time of (661.33±32.94) s in Wuhu population. There was no significant difference in crawling rate among different populations. The air exposure stress test showed that the air exposure time of juvenile shrimp did not over 18 h, and the descending order of survival rate in 48 h air exposure was Wuhu>Gehu>Xinghua>Jianli>Jianhu, with the survival rate of (87.78±1.11)% in Wuhu groups, and (68.89±1.92)% in Jianhu group. The finding provides reference for the evaluation of growth performance and ecological adaptability of different populations of P. clarkii, and lays a foundation for the next breeding, which has certain application value and practical significance.
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