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不同体质量规格的日本医蛭适宜越冬密度与繁殖性能研究 被引量:2

Study on the Optimum Overwintering Density and Reproductive Performance of Hirudo nipponia Whitman with Different Weight Sizes
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摘要 为了探究不同体质量规格的日本医蛭越冬的适宜密度以及对卵茧、幼苗的影响,选用不同体质量规格(A组为1 g,B组为2 g,C组为3 g,D组为4 g,E组为混合规格体质量组)的日本医蛭于面积为0.5 m^2的自制越冬池中越冬繁殖,记录越冬后日本医蛭存活数、产茧数量及卵茧孵化情况.结果显示,A-D组最佳越冬密度分别为3.174 kg/m^2,3.188 kg/m^2,2.904 kg/m^2和3.168 kg/m^2.A-D组平均产茧率为1.15,1.21,1.20,1.20.卵茧质量、幼苗平均质量随日本医蛭越冬规格增加而增加,出苗数也相应增多.结果表明,生产中为了获得较大规格的幼苗,应选择相对较大的亲本进行越冬繁殖,且单位面积总投放量控制在3.0~3.5 kg时,存活率最高,平均产茧率最大. To investigate the optimum overwintering density of Hirudo nipponia Whitman and its effect on cocoon and larva,different sizes of H.nipponia(A:body weight 1 g,B:body weight 2 g,C:body weight 3 g,D:body weight 4 g,and E:mixed body weight)were selected for overwintering and reproduction in a self-made pond with an area of 0.5 m^2.Survival rate,cocoon number and hatching rate of H.nipponia after overwintering were estimated.The results showed that the optimum overwintering density was 3.174 kg/m^2 in group A,3.188 kg/m^2 in group B,2.904 kg/m^2 in group C,3.168 kg/m^2 in group D.The average rate of cocoon production was 1.15 in group A,1.21 in group B,1.20 in group C and 1.20 in group D.The cocoon weight,the quality of larvae and hatching rate increased with body weight.When the overwintering mass was 3.0~3.5 kg/m^2 per unit area,the survival rate and the average cocoon production rate were higher than others.It was suggested that H.nipponia with relatively large weight should be selected for reproduction.
作者 余米 刘嘉 蒲德成 周梦 封孝兰 曹敏 YU Mi;LIU Jia;PU De-cheng;ZHOU Meng;FENG Xiao-lan;CAO Min(Chongqing Institute of Medicinal Plant Cultivation,Nanchuan Chongqing 408435,China;Guizhou Management Station of Livestock and Poultry Genetic Resources,Guiyang 550001,China;Agricultural and Rural Commission of Wuxi,Wuxi Chongqing 405899,China)
出处 《西南大学学报(自然科学版)》 CAS CSCD 北大核心 2021年第2期47-52,共6页 Journal of Southwest University(Natural Science Edition)
基金 重庆市科学技术局项目(cstc2018jxjl-jbky00003,cstc2019jscx-msxmX0357) 重庆市卫健委“药用动物学”重点学科建设项目.
关键词 日本医蛭 越冬 体质量 密度 孵化 Hirudo nipponia Whitman overwintering weight density hatching
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