摘要
分别于2008年月12月至2009年3月和2009年5月至8月,2次在北海市乔港镇沿岸浅海进行大獭蛤（Lutraria maxima Jonas）人工苗种自然海区沉箱式中间培育试验。试验培育工具为长方形聚乙烯水果框,规格为长×宽×高=50cm×35cm×15cm,放苗前框内装满中沙。试验用大獭蛤苗种规格为壳长0.2～0.5cm。分别经过2次75d和45d的中间培育,大獭蛤人工苗种增长至出苗规格2.5～3.5cm,成活率分别为42.56%、41.13%。在海水温度25.0～31.5℃和1000粒/筐养殖密度下,大獭蛤人工苗种的浅海沉箱中间培育生长速度快,成活率高,苗种活力强,养殖成活率高。
Experiments on juvenile nursery of Lutraria maxima Jonas stocked in sunk cages were carried out in the shallow sea at Qiaogang Town of Beihai from November 2008 to March 2009,and from May 2009 to August 2009.The size of the quadraticly plastic cages were 50cm×35cm×15cm.Before stocking,the cages were loaded with sand.In the present experiments,two groups of juvenile with shell length 0.2~0.5 cm were cultured for 45 d and 75 d,respectively and the shell length increased to 2.5~3.5cm.The survival rates were 42.56% and 41.13%,respectively.The faster growth rate,higher survival rate,and higher quality of juvenile would be achieved at the water temperatures of 25.0~31.5℃ and the stocking density of 1000 individual/cage.Furthermore the survival rate of the following culture is higher.
出处
《广西科学》
CAS
2010年第3期263-266,270,共5页
Guangxi Sciences
关键词
大獭蛤
苗种
中间培育
自然海区
Lutraria maxima Jonas
seed
intermediate culture
sea
