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| Growth Characteristics of Red Swamp Crayfish Procambarus clarkii in Greenhouses and Rice Fields in Hubei Area |
| ZHANG Long1, LUO Lingchen1, OUYANG Haofeng1, WU Ming2, LI Yanhe1 |
1.College of Fisheries, Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China;
2.Hubei Guobao Bridge Rice Co., Ltd., Jingmen 431800, China |
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Abstract The growth characteristics of red swamp crayfish Procambarus clarkii were studied in a greenhouse and a rice field, and the growth differences between male and female crayfish were compared in 599 samples collected from December 2018 to March 2019 in the greenhouse and in rice field by morphometrical measurement including body weight (y), total length (x1), carapace length (x2), carapace width (x3), total abdomen segment length (x4), first abdominal segment length (x5), first abdominal segment width (x6), caudal segment length (x7), sixth abdominal segment length (x8), sixth segment abdominal width (x9) and cheliped length (x10) to provide a theoretical basis for culture of the crayfish and the monoculture. The results showed that the total length and body weight were expressed as a power function regression as m=0.0209L3.1132 in greenhouses and rice fields. The best growth was observed in red swamp crayfish in greenhouse and rice fields from February to March, with the poorest growth in January. There was higher growth index in greenhouse than that in rice field during all periods, higher as twice body weight in greenhouse as that in rice field by March. During the lower temperature period from December to February, the average body weight increase rate of red swamp crayfish in greenhouse was 14.00％ higher than that in rice field,with 3.96％ higher in total length rate. The male red swamp crayfish had slightly higher body weight in the greenhouse than the female did in each period, without significant difference (P>0.05). Among all the growth indicators, male was always larger than female in only cheliped length, and there was significant difference between male and female after December 2018 (P<0.01).
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Received: 31 July 2019
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