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绥芬河水域是黑龙江省的一条独立水系,主要流经东宁县由绥芬河下水磨河段入苏联境内,自海参崴入日本海。绥芬河是大麻哈鱼和鲤科唯一溯河洄游鱼——滩头雅罗鱼的溯河繁殖的母河川。近年来绥芬河水域的水产资源也遭到严重的破坏,特别是名贵经济鱼类大麻哈鱼的产量下降到每年只有800—1000尾。为了增殖绥芬河水域大麻哈鱼资源,恢复绥芬河母河川,1988年建立起东平县鲑鱼放流站。并于当年春季首次向绥芬河放流驼背大麻哈鱼苗80万尾,其中做标志鱼3万尾。今年6月至8月是放流驼背大麻哈鱼的洄游季节,黑龙江省水产研究所和东宁县鲑鱼放流站对这一人工放流科研项目进行了调查。截止今年8月末,已在绥芬河下水磨河段捕到驼背大麻哈鱼610尾,平均体重0.95—1.5公斤,平均体长40—50厘米,其中做放流标志的鱼5尾,被剪掉的仔鳍没有再生长出 相似文献
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1989年4月10日,中国水产科学研究院黑龙江水产研究所在绥芬河东宁河段放流大麻哈鱼稚鱼62万尾,其中标志6万尾。这是该所承担农业部重点科研项目在绥芬河放流的第二批试验鱼。开展人工放流大麻哈鱼,对于培殖其资源,提高渔获量是一项投资少、见效快、效益高的渔业生物工程。 相似文献
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东宁县鲑鱼孵化放流站自1988年建站以来,连续多年向绥芬河放流鲑仔鱼,累计放流秋鲑、孟苏和驼背大麻哈257万尾。1995年4月10该站又向绥芬河的东宁县境内三岔口乡新立村河段放流鲑仔鱼40万尾。这批放流的仔鱼体叉长5～6cm,体质肥壮。当放 相似文献
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本报道绥芬河开展大麻哈鱼人工繁殖与孵化放流试验。1989、1991、1993年共采捕利用亲鱼674尾，其中雌亲鱼365尾， 采卵101．6万粒，雌亲鱼利用率为81．3％，受精率为95．6％，孵化率为96．3％，稚鱼饲养成活率为92．5％，放流稚鱼共92．2万尾。本项试验为该水系大麻哈鱼大规模殖放流提供必要的技术参数。 相似文献
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《淡水渔业》1989,(5)
<正> 绥芬河水域放流鲑鱼为了开发增殖我国名贵经济鱼类资源,中国水产科学研究院黑龙江水产研究所于1988年4月20日,1989年4月10日向绥芬河水域放流驼背大麻哈鱼80尾,大麻哈鱼62万尾。绥芬河是北太平洋水域的外流河,注入日本海。向绥芬河水域放流鲑鱼在我国还是第一次。 1987、1988年从苏联移殖鲑鱼发眼卵,在刚建立的黑龙江东宁县鲑鱼放流站孵化饲育,在黑龙江省水产总公司的大力支持和东宁县政府大力协助下,经科研人员6个多月的精心培育,放流的驼背大麻哈鱼平均体长3.8厘米,平均体重0.37克;大麻哈鱼平均体长6厘米,平均体重1.7克。在放流的幼鱼中还做了部分幼鱼的标志。 相似文献
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四月十八日,春意盎然,阳光明媚,蓝天白云下,碧水河岸边,东宁县水产局举办了（中国）绥芬河水系第二十四届大麻哈鱼苗人工增殖放流活动,放流大麻哈鱼苗25万尾。 相似文献
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Abstract. The tilapine fish species belonging to the genus Oreochromis brood developing eggs and early fry in their buccal cavities. Though it is obvious that mouth brooding facilitates a physical protection from environmental hazards by keeping fry in this confined environment, it is still not clear whether mouth brooding provides any other type of protection to the early fry against pathogens. Investigations were made to study the possibility of protection of early fry of O. mossambicus against infections of the ciliate parasite Ichthyophthirius multifiliis during mouth brooding. Adult females were effectively immunized against I. multifiliis. Brooding immune females were then challenged with controlled infections of I. multifiliis tomites and the survival of the fry compared to those of challenged non-immune brooding females. The study demonstrated that there was some protection from the infection conferred to fry during mouthbrooding. 相似文献
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应用低功率ＣＯ２激光、ＴＤＰ及其它红外辐射照射鱼卵、鱼苗、鱼种和成鱼可促进鱼胚、稚鱼、鱼苗、鱼种和成鱼的生长发育，缩短养殖周期，增强养殖鱼类的抗病抗逆能力和摄食能力，降低饵料系数，提高鱼类产品的产量和质量。 相似文献
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采用由美国的野生美洲鲥亲本人工繁育而来的子一代亲本进行苗种绿色生产试验,孵化育苗用水经过严格的消毒、过滤等处理,尾水通过水循环系统净化后排放,开口饵料以自行扩培的方式生产,并在种鱼养殖和苗种培育过程中使用经绿色生产资料认证的饲料。试验结果显示:养殖和育苗用水符合NY/T 391—2013《绿色食品产地环境质量》,排放水符合SC/T 9101—2007《淡水池塘养殖水排放要求》,孵化育苗过程顺利,获得美洲鲥苗种4.67万尾,苗种符合NY/T 842—2012《绿色食品鱼》的要求。 相似文献
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A.K. Dia 《Aquaculture (Amsterdam, Netherlands)》1982,27(3):187-195
A study of the growth of Chrysichthys walkeri juveniles in relation to density was made with 2520 fry distributed in nine small square ponds. The study was successful in 5 ponds with 1490 individuals.The oxygen level of the water was low especially during the night. The temperature ranged between 28 and 30°C. The fry were stocked in ponds just after yolk vesicle resorption at a weight of 5.4 mg. After 4 weeks, the ponds stocked lightly showed better results (greater weight of the fishes) than the more densely stocked ponds. After 7 weeks, the growth difference between lots was very significant.The fishes were fed with pellets from the first day of the experiment. The total mortality was 38%. 相似文献
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Abstract.— Shire River tilapia Oreochromis shiranus broodfish were stocked at a density of 1.25 fish/m2 and sex ratios of either 1:1 or 1:3 (males: females). Two weeks after stocking, fry collection began. Fry were then harvested weekly for 9 wk with a fine-meshed dip net operated from the pond bank for 1.5 h each morning and afternoon. Ten weeks after fry collection began, all ponds were drained and completely harvested. Over the entire 84 d, fry production averaged 0.78 fry/m2 per d and did not differ (P < 0.05) between treatments. Fry production per female was significantly higher (P < 0.02) in ponds stocked at a 1:1 sex ratio (111 fry/female) compared to a 1:3 sex ratio (66 fry/female). To avoid inbreeding without sacrificing production, a broodstock sex ratio of 1:1 can safely be used when producing O. shiranus fry at a density of 1.25 fsh/m2 in earthen ponds. Competition among females is a possible cause of reduced fry production in densely-stocked brood ponds. 相似文献
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Ravendra Kumar Singh Ajay S. Desai Sugandha L. Chavan Punam A. Khandagale 《Journal of the World Aquaculture Society》2008,39(2):275-280
Experiment was conducted to ascertain the effect of l ‐carnitine on growth and body composition of Cirrhinus mrigala fry (0.342 ± 0.03 g) using five different concentrations (0.25, 0.50, 0.75, 1, and 0%) of l ‐carnitine‐incorporated diets for 120 d. At the end of trial, weight gain, feed conversion efficiency, and protein efficiency of fishes fed with 0.25% l ‐carnitine diet were observed to be significantly higher. Poor growth was recorded in the fry fed diet with no carnitine, while intermediate growth was observed when fed with 0.50, 0.75, and 1% l ‐carnitine‐incorporated diets. The analysis of body composition of C. mrigala fry indicated that there is no significant difference (P > 0.05) in moisture, protein, and ash contents, but significant difference (P < 0.05) was found in body lipid content of fry, fed with different concentrations of l ‐carnitine. Decrease in viscerosomatic and hepatosomatic indices were observed in fishes fed with l ‐carnitine‐incorporated diets. Results of this study indicated that diet containing 0.25% l ‐carnitine can promote higher growth in C. mrigala fry. 相似文献