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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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杂交鲟深水网箱养殖技术 总被引：2，自引：0，他引：2
杂交鲟是鲟鱼类种间或属间杂交育种的产物,它具有个体大、生长快、抗病力强、怀卵量大的优点,是商品饲养中比较适宜的品种,能在淡水和咸淡水中生活。为寻找深水网箱适宜养殖品种,提高养殖经济效益,2003年6月我们进行了杂交鲟海水驯化和深水网箱健康养殖试验,均获成功,海水驯化成活率达90％以上,海水驯化后平均 相似文献
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论鲟鱼在水库渔业中的地位和作用 总被引：8，自引：3，他引：8
介绍了世界鲟鱼的资源,生物学,经济价值和人工养殖情况,结合我国水库渔业现状,提出了水库放养浮游动物食性鲟鱼,改善品种结构;放养底栖动物食性鲟鱼,充分利用水体资源,开展网箱和坝下流水养殖鲟鱼,提高经济效益;放养食鱼性鲟鱼提高生态效益等观点。目的是为了使我国水库渔业资源逐步得到优化配置,推动我国鲟鱼业的迅速发展。 相似文献
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<正>鲟鱼对于水质、温度等条件有独特要求，因此必须保障养殖水体指标合理可控。鲟鱼属冷水鱼养殖品种，对环境适应能力较强，且个体较大，极易成活，备受渔业养殖者的青睐。但鲟鱼养殖受客观因素影响，最终产能以及肉质等有明显差异，如鱼苗饲养环境不当，会导致鲟鱼大批死亡，降低养殖的经济效益。鲟鱼的病害主要分为真菌性、细菌性、营养性等类别，需要根据不同的病害采取不同的防治措施。 相似文献
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近几年．鲟鱼养殖得到了广大地区的推广，但许多养殖户都局限在工厂化养殖模式．工厂化养殖存在着许多问题．如溶氧、水资源、鱼病等,养殖成本明显偏高。为了充分利用本地区得天独厚的水质水域条件．降低养殖成本．横锦水库进行了网箱养殖鲟鱼的传统养殖模式的尝试．取得了良好的经济效益。 相似文献
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近几年,鲟鱼养殖得到了广大地区的推广,但许多养殖户都局限在工厂化养殖模式,工厂化养殖存在着许多问题,如溶氧、水资源、鱼病等问题,养殖成本明显偏高,为了充分利用本地区得天独厚的水质水域条件,降低养殖成本,横锦水库进行了网箱养殖鲟鱼的传统养殖模式的尝试,取得了良好的经济效益。 相似文献
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<正>鲟鱼以其适应性强,病害少,经济效益高,成为很受欢迎的水产养殖品种。近两年,易县的丰易鲟鱼养鱼场更是取得了不错的成绩,该场2012年共投放鱼种24万尾,产成鱼30万kg,盈利约150万元。现将该场利用地下水养殖鲟鱼技术做一总结,和广大养殖者相互交流,旨在促进该项事业的发展。1鱼池条件及配套设施该场建于地下水丰富的易水河畔,总面积7 相似文献
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近几年，鲟鱼养殖得到了广大地区的推广，但许多养殖户都局限在工厂化养殖模式，工厂化养殖存在着许多问题，如溶氧、水资源、鱼病等问题，养殖成本明显偏高，为了充分利用本地区得天独厚的水质水域条件，降低养殖成本，横锦水库进行了网箱养殖鲟鱼的传统养殖模式的尝试，取得了良好的经济效益。 相似文献
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国际虹鳟育种产业简介及其对我国的借鉴意义 总被引：1，自引：0，他引：1
虹鳟Oncorhynchus mykiss原产于北美地区,为典型的冷水性鱼类,是世界性重要经济养殖鱼类之一和水产遗传育种领域的重要研究对象。虹鳟是最早采用数量遗传学理论指导遗传选育的水产动物之一,BLUP育种值估计和配合力分析等遗传评定方法以及家系选育、杂交和配套系育种等技术均在虹鳟育种实践中广泛应用。淡水鱼类养殖中,必须使用遗传选育的优良品种的行业共识,最早在虹鳟中确立。目前,在欧洲、北美以及智利等主要鲑鳟鱼养殖国家和地区,虹鳟良种覆盖率均已达到90%以上。鉴于虹鳟仍是我国养殖产量最高的鲑鳟鱼类,其育种工作在许多非原产国都取得了令人瞩目的成就,本文以全球化的视角,从虹鳟养殖与选育的历史概况、虹鳟种业的主要技术手段及产业格局、主要虹鳟育种机构的组织形式与类型特点等方面,简要介绍了国际虹鳟种业的发展及对我国虹鳟种业的借鉴意义。 相似文献
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运用IFE-PAGE电泳技术,对施氏鲟(Acipenser schrencki Amur sturgeon)、小体鲟(Acipenser ruthenus Linnaeus)、西伯利亚鲟(Acipenser baeri Siberian sturgeon)、哲罗鲑(Huchotaimen Taimen)和虹鳟(Oncorhynchus mykissgo Lden rainbow trout)5种鱼类卵黄蛋白等电点的特性进行研究,建立了比较成熟的测定卵黄蛋白等电点的实验方法。5种鱼类卵黄蛋白等电聚焦电泳图谱都为3条带,表明5种鱼都是由3种卵黄蛋白组成,哲罗鲑和虹鳟卵黄蛋白都属于酸性类型,与鲟形目这3种鱼卵黄蛋白等电点差别较大。 相似文献
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Genetic improvement of cold-water fish species 总被引：25，自引：0，他引：25
T. Gjedrem 《Aquaculture Research》2000,31(1):25-33
Carnivorous fish are two to three times as efficient as pigs and broilers in converting energy and protein to edible food for humans. As the domestication of fish continues, they will become more and more efficient and competitive with these industries. In the future, this will be very important, as more efficient utilization of available food resources is required to supply the growing human population with enough food. Today, about 1% of aquaculture production is based on genetically improved fish and shellfish. For salmonid fishes, we have the necessary knowledge to establish efficient breeding programmes. Large genetic variation has been associated with important economic traits. For growth rate, heritability ranges from 0.2 to 0.3, with a coefficient of variation of 20–30%. This implies that it is possible to obtain large responses from selection for growth rate. In several large‐scale experiments and in breeding programmes, 10–15% genetic change has been obtained per generation, which is much higher than that reported for other farm animals. In Norway, extensive breeding experiments with Atlantic salmon and rainbow trout were started in 1971. For the first two generations of selection, the breeding goal was growth rate. Age at sexual maturation (measured as frequency of grilse) was then included. From the fifth generation, disease resistance (measured by challenge test for furunculosis and the virus ISA) and meat quality (measured as fat percentage, fat distribution and flesh colour) were included. Today, Norsk Lakseavl AS (Norwegian Salmon Breeding Company Ltd) or NLA runs the National Breeding Programme and has two breeding stations where 400 full‐sib and half‐sib families of Atlantic salmon are tested in each of four year classes. For rainbow trout, the number of families totals 120 in each of three year classes. In 1997, the Norwegian production was 310 000 tons of Atlantic salmon and 33 000 tons of rainbow trout. At present, about 65% of the salmon and trout produced in Norway use genetically improved fish from NLA and multipliers. The cost–benefit ratio for the National Breeding Programme in Norway is estimated to be 1:15. 相似文献
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Photoperiod enhancement of growth is becoming an area of increasing interest as a means of enhancing rainbow trout production efficiency in commercial practice. This paper examines the possible implications of shortening periods of constant light (LL) exposure on rainbow trout growth during autumn–spring grow-out under ambient water temperatures in freshwater to portion size. Triplicate groups of juvenile all-female rainbow trout were permanently exposed to LL in October, November, December or January. Growth was monitored and compared with those maintained under a simulated natural photoperiod (SNP) until the following May. Permanent exposure to LL (all treatments) resulted in significantly greater weight gain of rainbow trout than those under SNP. Furthermore, greatest growth was achieved when fish were left permanently exposed to LL from October. These findings suggest there may be implications for fish farmers if the period of photoperiod exposure is reduced, or timing of application is not considered with regards to ambient water temperatures. 相似文献
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《Journal Of Applied Aquaculture》2013,25(1):37-43
Abstract The production characteristics of juvenile rainbow trout, Oncorhynchus mykiss and brook trout, Salvelinus fontinalis were compared under winter pond conditions. Juvenile rainbow trout (55.1 ±1.5 g) and brook trout (28.9 ±0.4 g) were stocked at a density of 8,750 fish/ha into six 0.04-ha ponds. After 163 days, survival, growth, and feed conversion were similar (P >0.05). The results of this study suggest that brook trout may attain growth rates similar to rainbow trout under winter pond conditions in temperate regions of North America. 相似文献
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Evaluating the Rearing condition of Rainbow Trout (Oncorhynchus Mykiss) Using Fuzzy Inference System
Rainbow trout (Oncorhynchus mykiss) is one of the most popular aquacultured species in the world. Sustainable production of this fish at commercial scale is very important but requires maintaining good water quality throughout the total rearing period. The present study aimed to develop a rainbow trout production index in order to raise awareness about the conditions of the rearing environment, enhance production, and reduce losses. For this purpose, an intensive rainbow trout production system was selected as the study system. In this system, there were seven stations including (a) 3000 5-g fish, (b) 3000 25-g fish, (c) 3000 50-g fish, (d) 3000 100-g fish, (e) 3000 220-g fish, (f) 2000 350-g fish, and (g) 2000 830-g fish. The fuzzy inference system was used to develop the target rearing index. Water quality parameters involved in the variation in the rainbow trout rearing conditions were classified into three groups including un-ionized ammonia, nitrite, and nitrate, Alkalinity and phosphate, along with dissolved oxygen and linear velocity. For each group and condition of rearing, a separate fuzzy inference system was defined and the output of each fuzzy system was named I1, I2, I3. Finally, I1, I2, and I3 were considered as the inputs to a fuzzy system in order to evaluate their effects on the index of general rearing conditions (I). The results indicated that un-ionized ammonia, nitrite, nitrate, and phosphate had negative effects while dissolved oxygen, linear velocity, and alkalinity positively affected water quality and rearing index. Most of the decline in the rainbow trout rearing index was related to the effect of un-ionized ammonia, nitrite, and nitrate due to food decomposition. Therefore, intelligence feeding based on fish appetite through reducing food conversion rate and water pollution can improve rainbow trout production in this system. The index of rainbow trout production conditions reflects the type, amount, and effect of water quality pollutants on rearing conditions. Producers can use this information to reduce the negative environmental effects and improve the product quality. 相似文献
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In order to find an efficient method for marking fish a tagging experiment has been carried out at the Fish Breeding Experimental Station, Sunndalsøra, Norway. Three different methods have been tried: jaw-tagging, cold-branding and tattooing with two different types of dye. During the winter 1972/1973 relatively large numbers of rainbow trout (12 602), sea trout (2 065) and salmon (13 141) were marked using the three marking methods mentioned. It was found that cold-branding with liquid nitrogen was the most rapid and inexpensive method for marking salmonids; after about one year between 87 and 92% of the fish can be identified.For cold-branding rainbow trout and sea trout an exposure time of 3 sec is too long.Tattooing with fluorescent pigments gave poor results in this experiment but could be a useful method for marking salmonids if a device could be constructed that tattoos bigger spots.Fast blue is not recommended for marking fast-growing salmonids. 相似文献
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Acclimation of rainbow trout to sea water 总被引：1，自引：0，他引：1
Peter J. Landless 《Aquaculture (Amsterdam, Netherlands)》1976,7(2):173-179
In some fish farms it is advantageous to transfer rainbow trout from fresh water to sea water at as small a size as possible. It has been shown that a relatively small reduction in salinity at the marine site can give appreciable improvements in survival rates during acclimation by smaller fish, thus rainbow trout of 15 g have routinely been put directly into sea cages at a salinity of 22% with mortality levels of from 1 to 8%. 相似文献