利用海带育苗池培育黑鲪苗及苗种的疾病防治

Fry Rearing of Sebastodes fuscescens in Kelp Seeding Pond and Prevention of Seed Diseases

将在近海捕获的１４尾黑亲鱼放在海带育苗池内进行流水培育，让其自然产仔。共产健康仔鱼３６１４００尾，产仔率达２８．５７％。以小球藻、轮虫、卤虫幼体、少量海捕天然浮游动物和鱼、虾肉糜为系列饵料，培育２０～３０天，育出全长１４．２～３０ｍｍ的稚鱼３２２１９８尾，平均成活率８９．１５％；单位水体平均出苗量为６７１２尾／ｍ３。在１８～２４℃水温范围内，仔稚鱼的平均日增长量约为０．５ｍｍ。每３～５天轮流使用１ｍｇ／１的氯霉素，０．３ｍｇ／ｌ的鱼虾安，可以有效地防治仔稚鱼的细菌性疾患；用０．０５ｍｇ／ｌ的孔雀石绿药浴１５～２０分钟，可以防治真菌疾患。

Fourteen parent fish of Sebastodes .fuscescens caught from off shore were reared in kelp seeding pond under the condition of water flowing, and naturally spawnde. 361400 laealthy fry were collected, with a spawning rate of 28. o7K statistically. 322198 juviniles with a total ler:gth of 14. 2-30 mm were produced after 20-30 days of rearing with a series of food such as chlorella, rotifers, anemia nauplius, small quantity of zooplankton from the sea and fish, shrimp meat paste. The average survival was 89. 15% and the unit yield was 6712 indi./m3. Within a temperature range of 18-24℃, the average daily growth of the juviniles was about 0. 5mm. Bacteriai disease of fish could be effectively prevented if 1 mg/l of chloeamphenicol and 0. 3 mg/l of Yu Xia An were used in turn every 3-5 days. The fungous disease of fish could be prevented if the fish were bathed in 0. 05 mg/l of malachite green solution for 15-20 minutes.