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广东阳春市最大的桂花鱼苗孵化基地——万祥水库良种鱼苗繁育基地,自今年上半年投产以来,已生产桂花鱼苗3000万尾、白鲳苗2亿尾、四大家鱼苗10亿尾,实现产值约300万元。 相似文献
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永州市七里店乡麻元村是人工繁殖革胡子鲶(即埃及塘虱鱼)鱼苗的专业村。由于乡政府的重视,1992年6月27日成立了以养鱼专业户为主体的“麻元村特种水产专业技术研讨会”。市科协、市畜牧水产局、市畜牧水产学会负责同志到会祝贺。麻元村位于永州市南津中路旁,农民素有养鱼习惯和经验。1985年,该村支书陈天祯同志开始从事革胡子鲶人工繁殖鱼苗,现已发展到21户,1991年孵苗育种1000余万尾,产值达97800元,户平4657元;今年可生产鱼苗鱼种2000万尾,产值能达20万元,户平9523元,陈天祯同志能孵育鱼苗120万尾,产值可实现2万元。目前,革胡子鲶苗种已销至北京、浙江、安徽、河南、云南、郑州、江西、湖北等 相似文献
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通过引进南美白对虾优良品种,在淡水池塘养殖成功的基础上,进一步探索解决和完善南美白对虾的规模化健康养殖技术。在不同水域条件下,采用不同放养密度,进行对比养殖试验,取得最佳放养模式。利用大池套小池技术,解决淡水盐化虾苗先期培育,提高虾苗成活率,减少养虾池投入,节约成本10%。结果:试验推广面积341.9 hm2,总产虾1115.34 t,平均3262.5 kg/hm2;总产值3 346.02万元,单位产值97875元/hm2;总效益1758.9万元,单位效益51450元/hm2;投入产出比1∶2.1。平均规格15 g/尾,虾苗成活率63.98%。 相似文献
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革胡子鲶作为畏寒热带鱼类被引入北方已成为一种优良养殖鱼类。但苗种靠从南方购进 ,这样既不经济 ,鱼苗下塘成活率又低。为此 ,我们利用节能温室进行家庭式人工繁育鱼苗。通过几年试验 ,取得了良好效益 ,并得以推广。温室实用面积1180 ,每年可繁殖鱼苗156万尾 ,培育夏花、鱼种105.3万尾 ,获利15.64万元 ,可满足23.3~33.3hm2 池塘的养殖需求。本试验优点是投资不高 ,管理方便 ,水温水质易控制 ,病害易防治 ,鱼苗下塘成活率高等。现将1997年的试验总结如下。1试验材料1.1温室建造温室属南北向 ,东西… 相似文献
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<正> 工厂化养殖是一种新的养殖模式,代表着今后水产养殖发展方向。1999年乐亭县工厂化养殖牙鲆鱼5万尾,产值250万元,效益120万元。2000年乐亭县有13家生产单位,利用育苗室春季育苗后的闲置期进行了牙鲆鱼的工厂化养殖,养殖面积5644m~2,放养鱼苗28万尾。经过科学管理,现长势良好,预计春节前后生产商品鱼20万尾,创产值1000万 相似文献
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试验以广州梅县鱼类苗种场为试验基地,研究了池塘水体自然净化系统技术在鱼类人工繁育中的应用。试验中应用成果的核心技术对该场老化鱼池和陈旧设施进行调整和改造,形成了鱼类人工繁育两套鱼池水体自然净化系统。结果显示:经过2007—2008两年运行试验,25亩鱼池和繁育设施展现出高效功能,亲鱼成熟率和催产率达100%,受精率和孵化率达95%以上,年鱼苗生产总量达5亿多尾的规模化程度,比试验前提高效率达38.7%;育成10 cm以上的草鱼鱼种成活率达80%以上。结果表明,该两套系统特别适合水源较为缺乏,水质不同程度污染区域应用;也可作为鱼池建设和改造升级的技术支撑。 相似文献
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2004~2005年进行了翘嘴红鲌人工繁殖、夏花与冬片鱼种培育、成鱼池塘与网箱养殖试验,取得较好效果。2004年:催产亲鱼25组,出苗340万尾;3口发花池经25天饲养共产夏花鱼种24.91万尾,平均体长3.0~3.3 cm;3口育种池经140天培育共产冬片鱼种6.38万尾,平均体长12.4~14.3 cm,利润2660~2937元/667m~2,投产比1:2.64~2.82。2005年:3口成鱼池共产商品鱼7445 kg,平均单产413.6 kg/667m~2,利润4546~6333元/667m~2,投产比1:2.15~2.53;4口网箱共产商品鱼2558kg,平均单产32.0 kg/m~2,利润352~413元/m~2,投产比1:2.01~1:2.03。 相似文献
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One of the bottlenecks in Israel's cold water ornamental fish industry is the large loss of fish during the post-larval stage. As a first step towards increasing survival rates, the optimal stocking density in earthen ponds for fry of each species should be determined. The results of five consecutive experiments with fry of goldfish (Carassius auratus), common carp and koi (respectively, edible and ornamental morphotypes of Cyprinus carpio) are presented here. The experiments were run in 18 cages of 1 m3 and 0.8 mm mesh size placed in a 0.02 ha earthen pond, stocked at 50,100 and 200 fry per cage. The variables analyzed were growth rate, harvesting weight, biomass and survival. Equations to estimate growth rates under different conditions are given. The three fish types present different growth rates and survival patterns in relation to stocking density and season, which lead to different management implications. Koi can be stocked up to 2 million fry per ha without showing negative density effects. Goldfish should be stocked at low density (500,000–1 million fry per ha) in spring and at higher rate (2 million fry per ha) in summer. Common carp stocking density should be adjusted to obtain the required fish size at harvest. 相似文献
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《Aquaculture (Amsterdam, Netherlands)》1986,53(2):115-132
Milkfish (Chanos chanos Forsskal) reared from wild-caught fry and from hatchery-bred fry matured at 3.5–5.5 years (2.3–4.9 kg). Maturation and spawning of the hatcherybred fish marks the first time the milkfish life-cycle has been completed in captivity.Milkfish at various stages of gonadal development were obtained in July–October 1980 and March–June 1981 derived from wild-caught fry, and in February–June 1983 from the hatchery-bred fish. The fish were held in floating net cages 9 m and 10 m diameter by 3 m deep, located in 7 m deep water off Igang, Guimaras Island, Philippines. Annual ranges of temperature and salinity were 25–33°C and 25–38 ppt, respectively. The fish were fed commercial feed pellet (42% protein) at 1.5–2% of body weight twice daily.Sexual maturation occurred during the natural breeding season of wild milkfish in the nearby waters. Gonadosomatic index (GSI) of mature males was 0.32–3.95 (wild-caught, 0.32–3.95; hatchery-bred, 1.71–3.85). For mature females it was 1.24–8.12 (wildcaught, 1.56–7.62; hatchery-bred, 1.24–8.12). Two spawnings were recorded in August 1980 and eight in May–July 1981 from the broodstock derived from wild-caught fry, with 342–6293 eggs collected from each spawning, while 14 spawnings were observed in May–June 1983 from the hatchery-bred fish, with 770–114 000 eggs collected. The time of spawning was between 23.00 and 02.00 h. Fertilization rate was 55–99% for the broodstock from wild-caught fry and 47–100% for the hatchery-bred fish. Hatch rate varied from 9 to 80%.Factors affecting spontaneous maturation, spawning and rematuration are discussed. Although slight improvements in egg collection were obtained, further innovations in egg collecting techniques will have to be developed. The results indicate the potential for hatchery production of milkfish fry from captive broodstock and for restocking of waters deprived of naturally occurring fry. 相似文献