南美白对虾室外育苗的初步试验

Preliminary Experiment on Rearing Litopenaeus vannamei Larvae Outdoors

在4个室外水泥池和2个室内水泥池进行南美白对虾育苗试验,室外池总育苗水体为40 0m3,室内池总育苗水体为20 0m3。直接在室外育苗池培养单胞藻;白天日照时间为8h以上,光照强度为500～8000lx;室外育苗池共放入南美白对虾无节幼体600万尾,培育至体长1 0cm的虾苗,出苗354 4万尾,总成活率为59 1%。室外育出的虾苗规格整齐,体质强壮;比室内池育苗的时间缩短3～4d。

The experiment was carried out in four outdoor ponds and two indoor ponds.The total volume for rearing larvae was 200 m3 indoors and 400 m3 outdors.Unicellular algae were bred in outdoor ponds.In the day,it shined over 8 hours,the light intensity was 500～8000 lx6 million nauplius of Litopenaeus vannamei were reared in the outdoor ponds and 3 million nauplius were reared in the indoor ponds.The results are as follows:3 544 000 post larvae at body length of were got in 10 cm the outdoor ponds.The total survival rate was 591% outdoors.The larvae reared outdoors came out evenly and strongly;the time that larvae were reared outdoors from nauplius to post larvae at 10 cm body length was 3～4days which is shorter than the time indoors.