Effects of temperature and salinity on survival and growth of juvenile ark shell <Emphasis Type="Italic">Anadara broughtonii</Emphasis> |
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| Authors: | Qingzhi Wang Xi Xie Ming Zhang Weiming Teng Miao Liang Ning Kong Chao Wang Zunchun Zhou |
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| Institution: | 1.Liaoning Ocean and Fisheries Science Research Institute,Dalian,China;2.National Marine Environmental Monitoring Center,Dalian,China;3.Dalian Ocean University,Dalian,China |
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| Abstract: | We investigated the combined effects of temperature (23, 26, 29 and 32 °C) and salinity 15, 18, 21, 24, 27 and 30 practical salinity units (PSU)] on the growth and survival of juvenile ark shell Anadara broughtonii under hatchery conditions. Mortality, shell length and shell height were monitored for a period of 25 days in all exposure groups. Survival greater than 98% was observed in all treatment groups with no significant difference among treatment combinations. Absolute growth and specific shell length and height growth rate were significantly influenced by temperature and salinity. Growth of juvenile A. broughtonii increased with higher salinity and peaked at an intermediate temperature (26 °C). Optimal specific growth rates of 4.64 ± 0.04% day?1 by shell length and 4.76 ± 0.11% day?1 by shell height were observed at a combination of 26 °C and 30 PSU. This study enhances our understanding of the biology of A. broughtonii and determines ideal environmental conditions for pre-planting culture operations. |
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