人工繁殖虾夷马粪海胆生长模型

Growth model of artificially bred Strongylocentrotus intermedius

以虾夷马粪海胆（Strongylocentrotus intermedius）家系为实验材料,对比分析了每个母系从孵化后到17月龄（性成熟）的体重、壳径、壳高的生长情况,并进行了生长性状间的相关分析及预测模型的构建。结果表明：5~15月龄,各家系虾夷马粪海胆在壳径、壳高与体重方面的差异均不显著（P〉0.05）,17月龄时,各家系的生长指标出现差异（P〈0.05）;虾夷马粪海胆壳径、壳高生长呈线性模型,而体重生长呈指数模型;利用虾夷马粪海胆各月龄生长性状数据,进行了虾夷马粪海胆壳径、壳高与体重相关关系分析,R2值为0.68~0.86,而虾夷马粪海胆父母本的生长性状与子代的生长性状相关性较低（0~0.25）。虾夷马粪海胆体重、壳径和壳高的生长预测模型表明,通过11月龄体重预测17月龄体重的准确率可达73.6%;本研究有助于深入了解虾夷马粪海胆的生长发育特征,并为其健康养殖模式构建提供理论依据。

Sea urchin（Strongylocentrotus intermedius）purebreds were established by using artificial insemination（1♂：3♀）,and the phenotype characters（shell length,shell height,and body weight）of thirty individuals of each purebred from 5-15 months old to sexual maturation（17 months old）were analyzed.The correlation analysis of the characters was carried out,and the growth prediction model was constructed.There were no significant differences（P0.05）in the phenotype characters among the individuals of the purebreds at 5-15 months old,but significant differences for those at sexual maturation（P0.05）.The growth of shell length and shell height showed linear models,while that of body weight showed an exponential model.The multiple correlation coefficient（R2）of the phenotype characters was 0.68-0.86.The body weight at 17 months old could be predicted by that at 11 months old,with the accuracy of 73.6%.There was no strong relationship between the parents and the offspring in the phenotype characters（R2=0-0.25）.This study contributed to deepen our understanding of the growth pattern of S.intermedius,and provided theoretical basis for the construction of healthy aquaculture mode.