摘要
进行盐度和温度对中华虎头蟹存活和摄饵影响的试验，结果发现，盐度骤变时，盐度15—408d后蟹存活率100％。盐度10—45蟹能摄饵，日平均摄饵量达1．31g以上；盐度20—40是蟹适宜摄饵盐度，日平均摄饵量达3．65g以上；盐度30—35蟹摄饵最佳，日平均摄饵量达5．24g以上。盐度渐变时，盐度15—55蟹8d后存活100％；盐度5—50蟹能摄饵；盐度25—35为蟹摄饵适宜盐度，日平均摄饵量达4．13g以上；盐度30为最佳盐度，日平均摄饵量达4．53g。温度骤变时，10—30℃7d后蟹100％存活。10—35℃蟹能摄饵，日平均摄饵量达1．10g以上；20—30℃蟹摄饵最佳，日平均摄饵量逐渐增加，达8．76g以上。温度渐变时，0—30℃蟹7d后100％存活，35℃蟹存活率达80％。10—35℃蟹能摄饵；20—30℃蟹摄饵较佳，日平均摄饵量达12．61g以上；250C蟹摄饵最佳，13平均摄饵量达14．35g。
The tiger crab, Orithyia sinica is a commercially important, edible crab which is distributed in the north-west of the Pacific. Experiments were conducted to identify the effect of salinity and temperature on survivorship and food intake of Orithyia sinica. The results showed that, with a quick salinity change, the survival rate of Orithyia sinica was 100% for 8 days at salinity levels 15 --40. The crab fed at salinity 10 --45 , the mean food intake was 〉 1.31g/d. The crab fed well at salinity 20 --40 , the mean food intake was 〉3.65g/d. The crab fed best at salinity 30 --35 , the mean food intake was 〉 5.24g/d. With the gradual salinity change, the survival rate of Orithyia sinica was 100% for 8 days at salinity 15 --55. The crab could feed at salinity 5 --50. The crab fed best at salinity 25 --35, the mean food intake was 〉4.13g/d. With quick temperature change, the survival rate of Orithyia sinica was 100% for 7 days at 10 --30℃. The crab fed at 10 -- 35℃, the mean food intake was 〉 1.10g/d The crab fed best at 20 -30℃, the mean food intake was 〉8.76g/d. With the gradual temperature change, the survival rate of Orithyia sinica was 100% for 7 days at 0 --30℃, and 80% at 35℃. The crab could feed at 10--35℃. The crab fed best at 20--30℃, the mean food intake was 〉 12.61g/d. Because, the crab could survive at the salinity 5 --55, the appropriate survival salinity was 15 --45, the proper salinity for food intake was 25 -- 35, and the optimum salinity for food intake was 30, the Orithyia sinica is living in inshore that suit to live in relatively low salinity seawater. Because, the crab can survive at 0--35℃, can feed at 10--35℃, the proper temperature for intake of food was 20 --30℃, and the optimum temperature for intake of food was 25℃. Therefore, the Orithyia sinica is a temperate crab that distributed in the north-west of the Pacific, from the north of South China Sea to the Korean peninsula.
出处
《生态学报》
CAS
CSCD
北大核心
2007年第2期627-639,共13页
Acta Ecologica Sinica
基金
广东省教育厅自然科学基金资助项目(0409018)~~
关键词
中华虎头蟹
盐度
温度
存活
摄饵
Orithyia sinica
salinity
temperature
survivorship
intake of food
