温度对杂色鲍不同群体生长率与存活率的影响

在16、20、24和28℃这4个设定的水温下，以杂色鲍（Haliotisdiversicolor）日本群体、台湾群体、越南群体和“东优1号”为材料，进行为期40d的养殖试验，对4个杂色鲍群体在不同温度下的壳长日增长率（LGR）和体重日增长率（WGR）进行比较．结果表明，“东优l号”杂色鲍群体在28℃时的LGR和WGR值分别达到162．23±15．79lxm／d和46．52±6．89mg／d，在4个温度下的LGR和WGR值都优于其他3个群体，台湾群体在较高温度（24和28℃）条件下的LGR和WGR值要高于日本群体，而日本群体在较低温度（16和20℃）时的值则高于台湾群体．双因素方差分析的结果进一步表明，温度对杂色鲍不同群体的生长率指标具有显著影响．

Effects of temperature on the growth rates and survival rates of Haliotis diversicolor among different populations

The small abalone,Haliotis diversicolor,is naturally distributed along the coastal waters of East Asia and is a commercially important species cultured along the coast of southern China.The current study genetically characterized four different small abalone populations(Japan,Taiwan,Vietnam,and "Dong You No.1") that were reared at 16,20,24,and 28℃ for 40 days,and the values of length growth rate(LGR) and weight growth rate(WGR) were investigated.The study revealed that the Dong You No.1 and the Vietnam populations had the highest and lowest values of LGR and WGR,respectively.Dong You No.1 reached 162.23±15.79 μm/d for LGR and 46.52±6.89 mg/d for WGR at 28℃.In terms of LGR and WGR,the Taiwan population performed better than the Japan population at higher temperatures(24 and 28℃),while the Japan population performed better than the Taiwan population at lower temperatures(16 and 20℃).The impact of population and temperature on LGR and WGR was investigated by two-way analysis of variance.The current study indicated that the impact of population and temperature on growth were both highly significant(p<0.01),and a significant association(p<0.05) between population and temperature was also found.The results provide useful information for optimal growth conditions for the small abalone industry.