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大型抗风浪深水网箱养鱼技术专题系列讲座(一)海水网箱养鱼综述 总被引：2，自引：0，他引：2
一、鱼类是海洋水产的主体，养鱼的发展潜力很大 １．养殖数量 全世界目前海水鱼类养殖产量占水产养殖产量的２％，占海淡水鱼类养殖产量的４％，产值却占１５％。我国海水鱼类养殖所占份额现在还较少，五十、六十年代长期处停滞状态，九十年代有较快发展。１９９９年海水鱼类产量３０．６７万吨，占海水养殖产量９７４．３万吨的３％，占海淡水养殖产量２３９６万吨的１．３％。 ２．养殖种类全世界已养殖利用的鱼类种类为１６６种，仅占全世界鱼类种数的０．７％。相对于其他贝、藻等养殖来说，我国鱼类养殖种类较少。日本海水增养殖８０… 相似文献
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近20年来，我国的水产养殖业发展迅速，其中海水养殖的增长速度最为显著，养殖规模日益扩大，养殖种类不断增多。到2007年上半年为止，全国海水养殖总面积达1846．02千hm^2，占水产养殖总面积的23．45％，海水产品产量1185．37万t，占水产品总产量的53．02％。与此同时，海水养殖疾病造成的危害日趋严重。 相似文献
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本文较详细地介绍了利用海水与海水晶进行20亩池塘的淡化养殖南美白对虾的效果对比试验情况。使用海水淡化养殖的池塘，虾苗淡化成活率90.3%，平均亩产364．7kg，养殖成活率90．2％，亩毛利润为5616．2元；使用海水晶淡化养殖的池塘，虾苗淡化成活率87．6％，平均亩产353．4kg，养殖成活率88.7％，亩毛利润为5441．6元。试验结果表明，两者在养殖成活率、生长速度、亩产量、饲料系数等方面均表现出无明显的差别。本文还介绍了淡化养殖南美白对虾操作技术，对养殖生产者具有一定的参考价值。 相似文献
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海水养殖业的发展及前景 总被引：4，自引：0，他引：4
我国的海水养殖按区域分为：浅海养殖、港湾养殖和滩涂养殖三种，其中浅海和滩涂养殖在我国海水养殖业中占主导地位：1986年，浅海养殖产量包包产量的5225％，港湾、滩涂和浅海的养殖产量比为1：4．49：6刀1，1996年．港湾、滩涂和浅海的养殖产量比为1：5．14：6．48。1986－1995年间，浅海养殖发展起伏较大：1988年、浅海养殖产量增长43D7％，1990年只增长了O．52％，1992年和1993年有所提高，分别为33．77％和36．67％，到了1996年，浅海养殖产量增长为负值。滩涂养殖发展，1986－1990年年均增长赔．63％．1990年以后发展更快，年均增长… 相似文献
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泰国水产养殖近１０年来发展十分迅速，１９９２年泰国养殖产量已达３７１．４００ｔ，养殖在４９．７５２ｈａ，本文作者收集了大量资料，主要介绍了泰国养殖业的两头养殖种类及养殖方法，水产养殖研究，教育，管理及推广工作。 相似文献
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浙江三门县为“中国青蟹之乡”．有围塘养殖面积9．57％亩，其中青蟹养殖9．2万亩。在养殖青蟹的同时，大多养殖塘混养了脊尾白虾，并取得很好的经济效益．单脊尾白虾养殖亩产值达3000多元。现将我县脊尾白虾围塘养殖高产技术总结如下，供大家参考： 相似文献
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彩虹鲷又称红罗非鱼、红吴郭鱼，为尼罗罗非鱼和莫桑比克罗非鱼的杂交突变型良种．具有食性广、生长快、抗病力强、耐低氧等诸多优点。利用水库网箱养殖彩虹鲷，可以调整各地养殖品种，优化水产养殖结构，提高水库水体生产效率。养殖试验表明．要实现彩虹鲷水库网箱养殖高产高效．必须把握以下技术． 相似文献
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本文阐述了欧洲鲟鱼在网箱中进行人工养殖切实可行是欧洲鲟鱼养殖的最佳模式，利用７５ｍ＾２（３只网箱）养殖２欧洲鲟鱼试验，经过１７０天饲养鲟鱼４５４公斤，单产每平方米６．０５公斤，出箱欧洲鲟鱼３９５民活率９８．８％，平均规格１．１５公斤，饲料系数２．５，投入产出比１：２．１７，获得显著的经济效益和社会效益。总结出网箱养殖欧洲鲟鱼生产配套养殖工艺。 相似文献
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牙鲆室内人工养殖试验 总被引：7，自引：0，他引：7
报道了室内养殖牙鲆的试验结果,１９９２年－１９９５年进行的小规模试验。将受精卵培育至鱼苗、成鱼直至成熟亲鱼。在水温为２－２５℃范围内,经过３６个月将全长为５．３ｃｍ鱼苗培育至全长为４６．８ｃｍ、体重为１７８０ｇ的商品鱼,成活率为５０．６％。１９９７年－１９９８年进行的生产性养殖试验,在水温为１０－３３℃范围内。经过１０个月将全长为５．４ｃｍ鱼苗养至全长为３３．４ｃｍ、体篝为３５６ｇ的商品鱼、成活率 相似文献
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本文研究了中国对虾经锌和氨氮的毒性作用后肝胰脏内部结构发生的变化和损伤。结果表明,当锌和氨氮的不同浓度试验液对对虾经不同时间的中毒试验后,构成对虾肝胰脏肝小管的细胞组成、肝小管结构等发生不同程度的变化和损伤。在低浓度的锌和氨氮试验液的毒性作用下,构成肝小管管壁的分泌细胞增多,吸收细胞减少,且分泌细胞内形成较多的分泌小泡;当经高浓度的试验液作用后,不但肝小管管壁内的吸收细胞减少,分泌细胞增多及产生大量分泌小泡,而且因分泌细胞的破裂解体导致部分肝小管损伤或破坏。文中并就对虾肝胰脏在锌和氨氮的毒性作用下发生的变化与肝胰脏自身的解毒作用机理进行了初步的探讨。 相似文献
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Four non-pigment-producing isolates and two pigment-producing isolates of Aeromonas salmonicida sp. salmonicida were isolated from the head-kidney of diseased farmed Atlantic salmon, Salmo salar L. The cultural, morphological and biochemical features of the isolates were compared with those of reference strains. Injection and cohabitation experiments were performed. The only difference between the non-pigment-producing isolates and the pigment producing reference strains of A. salmonicida ssp. salmonicida was the inability of the former to produce pigment. In the injection experiments, the investigated non-pigment-producing isolate produced a significantly higher mortality compared with the mortality caused by the reference strain, whereas no difference in mortality was detected in the cohabitation experiments. 相似文献
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牡蛎的营养和降糖作用研究 总被引：15，自引：1，他引：14
研究了牡蛎的营养价值和降糖作用,并对牡蛎提取物进行了分离。牡蛎的营养分析表明,牡蛎具有丰富的鲜味氨基酸,其必需氨基酸种类齐全。但经氨基酸评分看出牡蛎又是非平衡蛋白质,糖原和牛磺酸的含量高是牡蛎的另一个显著特点,是研究牡蛎降糖作用的基础。通过对牡蛎降糖作用的研究表明,牡蛎提取物对降低血糖、尿糖,改善临床症状效果显著。 相似文献
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H. Hogendoorn 《Aquaculture (Amsterdam, Netherlands)》1979,17(4):323-333
Field experiments on controlled propagation of Clarias lazera (C. & V.) were carried out in Cameroon in 1975–1976. Reproduction was induced in small ponds using desoxycorti-costerone acetate. In artificial reproduction experiments, ovulation was induced with acetone-dried carp pituitary and the sexual products were obtained by stripping the females and dissecting the males. Artificial fertilization, incubation and hatching of the eggs were successfully carried out.Different methods of producing fingerlings in ponds were compared but none was considered satisfactory. Rearing the fry in troughs was not achieved, but it is felt that this offers the best prospects for reliable production of fingerlings. Suggestions for further improvement of the techniques are given. 相似文献
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采用一套自主开发研制的加压溶气气浮装置,对养殖水体中的微颗粒进行净化。选取液位高度、液体流量、溶气压力进行单因子试验和正交试验,单因子试验结果表明,液位0.8 m具有浊度去除的最佳效果;液位1.0 m对浊度去除率和pH的增加率的影响较显著;液体流量为400~600 L/h时,浊度去除率最大;液体流量为200~400 L/h时,溶解氧和pH增加率最大;溶气压力为0.5 MPa时,浊度的去除率达到了最大值的72%,同时,pH的增加率也达到了最大值,溶气压力为0.4 MPa时,溶解氧的增加率达到了最大值;通过正交试验得到三因素的最优组合为:液位高度1.0 m、液体流量200~400 L/h、溶气压力0.4 MPa。 相似文献
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Daisuke Shiode Yasuzumi Fujimori Fuxiang Hu Susumu Shimizu Teisuke Miura 《Fisheries Science》2001,67(1):110-117
SUMMARY: Flume-tank experiments were performed to examine the depth response of a new type of depth-controlled gillnet. Variations of net depth were investigated as the warp was paid out and wound up for different changes of warp length, main sinker weights, and winch speeds. In most experiments, when the warp finished paying out, the net continued to descend and then ascended slightly to an equilibrium depth (overshoot phenomenon). The overshoot distance was nearly constant when the warp was wound up and increased linearly with increasing winch speed when the warp was paid out. An increase in winch speed reduced net settling time, which converged on a constant value for both paying out and winding up. 相似文献
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In this study the effects of growth hormone (GH) on silver sea bream branchial heat-shock protein 70 (HSP70) expression was
investigated using in-vivo and in-vitro experiments. For in-vivo experiments, sea bream were administered recombinant bream
GH or the GH secretagogue hexarelin. Pituitary levels of GH were unchanged in fish administered exogenous GH but decreased
on hexarelin administration, in comparison with saline controls. Levels of HSP70 were measured using immunoanalysis and it
was found that both GH and hexarelin administration caused a significant decrease in branchial HSP70 abundance. For in-vitro
analysis, branchial filaments were exposed to a range of GH concentrations (1, 10, and 100 ng/ml) and it was found that HSP70
levels were significantly lowered in all cases. This study adds to the growing body of evidence surrounding the importance
of hormones in regulating heat-shock protein expression in fish. 相似文献
20.
Sami Abdul-Rahman Mohammed K. Owaied Hanafy Holail Nadim Farajalla Mustafa Haidar 《Journal Of Applied Aquaculture》2013,25(3):212-230
Two experiments were performed in the Bekaa plain in Lebanon to evaluate the feasibility of integrating aquaculture with established agriculture production in order to increase water productivity. Both experiments consisted of four plant management treatments: 1) Aquaculture effluent irrigation and no fertilizer; 2) aquaculture effluent irrigation and inorganic fertilizer; 3) well water irrigation and no fertilization; and 4) well water irrigation with inorganic fertilizer. In the first experiment, tilapia growth and radish production using aquaculture effluent were evaluated. All fish survived and grew, and radish production was improved by irrigating with aquaculture effluent. In the second experiment, maize (Zea mays) in large plots was irrigated with aquaculture effluent. Irrigation with effluent water improved maize production and improved soil nitrogen availability. In both experiments, fish production improved water value index and water use efficiency. Results suggest that aquaculture effluent can supplant inorganic fertilizers and could actually yield better crop production. 相似文献