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2003年4～5月，在南通东朋水产品有限公司吉成河蟹育苗场进行河蟹育苗，共育出四批大眼幼体。前两批以丰年虫无节幼体为主要饵料，1．500m^3育苗水体共育出大眼幼体370kg，平均出苗量0．25kg／m^3，蟹苗质量较好(规格为15万只／kg左右)，但育苗成本很高，为800元/kg；第三批苗以新鲜淡水蚤(桡足类)为主要饵料，丰年虫无节幼体为辅助饵料，495m^3育苗水体共育出大眼幼体99kg，平均出苗量0．20kg／m^3，蟹苗个体小(规格在44万只／kg左右)，质量差；第四批育苗完全不用丰年虫无节幼体，而是采用生态法育苗，施肥培育单细胞藻类，450m^3水体共育出大眼幼体260kg(3900万)，平均出苗量0．5kg／m^3左右，育苗成本低，大眼幼体质量好。规格在8000只／kg的幼蟹,回捕率在30％以上。 相似文献
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江苏省赣榆县水产研究所与赣榆县海带育苗场一起,于1983年首次利用紫菜等育苗设备进行工厂化培育河蟹苗,获得成功,共育成河蟹大眼幼体1,271.9万只。今年4月17日,在234立方米的育苗水体中,又育成体质健壮的河蟹大眼幼体1,481.35万只,计134.62斤,平均每立方水体育成大眼幼体6.83万只,其中18 相似文献
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在全埋式无地沟无法吸污的育苗条件下，利用鲜活生物活饵料进行中华绒螯蟹(Eriocheur Sinensis)俗称河蟹的大棚育苗，配套生物饵料培养池50，000m^2，育苗水体1，680m^3，平均每m^3育苗水体培育出河蟹大眼幼体0.289kg。共育河蟹大眼幼体486kg，其中试验池为1，520m^3水体；单位水体出苗量为0．314kg，对照池为l60m^3水体；单位水体出苗量为0．190kg。试验池比对照池每m^3水体出苗量增产39．5％。 相似文献
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介绍了利用春季闲置的海水池塘在室外培养轮虫，利用自然海水快速培养海洋单细胞藻——角毛藻。河蟹繁育的饵料大部分利用自然活饵料，Z1～Z5期间，无饵料成本；育苗方式模仿自然生态，培育的大眼幼体的规格大(15万只／kg)，出苗产量高(0．35kg／m^3)，幼体无病害。 相似文献
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自上世纪70年代起，我国的河蟹人工繁殖研究先后解决了亲蟹饲养运输、交配产卵、越冬孵化、幼体培育和蟹苗暂养等一系列技术问题；90年代后期，河蟹土池育苗技术日趋成熟，给河蟹养殖业的快速发展奠定了基础。笔者总结前几年河蟹土池育苗经验的基础上，在布苗、饵料等方面进行了技术改进，2003年7口试验池塘，总面积7亩(15亩=1公顷，下同)，共育出大眼幼体226kg，平均亩产32．4kg，产值13．56万元，利润5．03万元。现将试验情况报告如下： 相似文献
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微型饵料在河蟹育苗生产中的应用 总被引：1，自引：0，他引：1
河蟹育苗用的微胶囊饵料和微膜饵料1988年由江西省水产科学研究所首次研究成功后，便应用于生产中，育苗效果十分良好，它不仅可以取代卤虫，而且其饵料成本大幅度下降、经济效益猛升．生产应用效果表明，在人工半咸水的生产条件下，分别用卤虫和微型饵料培育出的大跟幼体，其平均体重为5．651mg和5．65mg；平均体长均为4．23mm．共育蟹苗37．01kg，其中微饵育苗33．99kg．单位水体产苗量，卤虫对照组平均为0．114kg，最高为0.151kg；微饵试验组平均为0.395kg，最高为0．692kg，大眼幼体成活率，卤虫组平均为4.3％，最高5.88％：微饵试验组平均为13．18％，最高为23．47％。经济效益水分显著。 相似文献
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近年来，河蟹天然苗几近枯竭，而河蟹养殖业却蓬勃兴起。促使了河蟹人工育苗迅猛发展，育苗产量逐年提高，如江苏的启东、如东两地1997年产大眼幼体达1万多公斤。但就目前情况看，人工育苗的大眼幼体的质量普遍存在着一些不尽人意之处，如：幼体规格小，活力差，体质软弱，幼体身上寄生敌害生物等等，导致了大眼幼体运输成活率低，大眼幼体变幼蟹死亡率高。笔者这几年在河蟹人工育苗中，对提高大眼幼体质量作了些有益的探索，现将工作中的几点体会总结如下。首先分析一下造成大眼幼体质量差的原因，大致有以下几个方面：1．布苗密度偏大为了… 相似文献
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河蟹幼体配合饵料的研究 总被引：8，自引：0，他引：8
<正> 随着我国河蟹养殖业的迅猛发展,蟹种及饵料已成为阻碍河蟹养殖的关键问题。为此,我们于5～6月对大眼幼体至三期幼蟹的人工配合饵料进行了试验研究。试验结果表明:在这段养殖期间,完全可采用人工配合饵料来代替天然饵料,而且,从大眼幼体至一期幼蟹的平均成活率为75.75％,最高达86.50％;由大眼幼体变为三期幼蟹的平均成活率为43％,饵料系数为0.95,均优于对照组。 相似文献
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Paulo Jorge Gavaia Susana Domingues Sofia Engrola Pilar Drake Carmen Sarasquete M Teresa Dinis & M Leonor Cancela 《Aquaculture Research》2009,40(14):1585-1593
The Senegalese sole is a marine pleuronectiform that naturally occurs in Southern Europe and Mediterranean region where it is being produced in aquaculture, in particular in Portugal and Spain. The aim of this study was to assess the quality of hatchery-reared larvae in comparison with those reared in the wild, and determine to which extension wild growing larvae are also affected by skeletal deformities. The main structures affected included those forming the axial skeleton, the caudal fin complex and both anal and dorsal fins, with the most prevalent anomalies affecting caudal vertebrae and arches. Hatchery-reared fish presented a higher incidence of deformities (79%) compared with the 19% observed in wild specimens. In wild postlarvae collected in Autumn no deformities were observed. This work clearly shows that wild Senegalese sole present less skeletal deformities than those hatchery-reared during larval stages, indicating a selective mortality of wild deformed fish and/or an effect of aquaculture-related rearing conditions in the development of skeletal deformities in sole. 相似文献
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温度和盐度对鞍带石斑鱼受精卵发育及仔鱼成活率的影响 总被引：4，自引：0，他引：4
研究了在8个盐度梯度(18.3‰、19.7‰、21.2‰、23.5‰、25.6‰、27.1‰、29.5‰和31.7‰)下鞍带石斑鱼Epinephelus lanceol受精卵和仔鱼在水中的分布状态、出膜率和仔鱼存活率;在9个温度梯度(18℃、20℃、22℃、24℃、26℃、28℃、30℃、33℃和35℃)下,其受精卵孵化率、畸形率和仔鱼成活率。结果表明:(1)在水温为25~26℃,当盐度≤25.6‰时,受精卵表现为沉性;当盐度≥27.1‰时,受精卵表现为浮性。仔鱼的分布与受精卵有相似的特点,当盐度≤21.2‰时仔鱼分布在底层水体;当盐度≥27.1‰时,仔鱼集中分布在上层水体。(2)以孵化率和成活率为指标,鞍带石斑鱼孵化的适宜盐度范围为21.2‰~31.7‰,最适盐度范围为25.6‰~31.7‰。在盐度为31.7‰时仔鱼成活率最高达到75.9%。(3)鞍带石斑鱼胚胎发育的适温范围是26~30℃。28℃时受精卵孵化率、仔鱼成活率均最高,畸形率最低。 相似文献
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Growth,settlement and survival of Dicathais orbita (Neogastropoda,Mollusca) larvae in response to temperature,diet and settlement cues 
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下载免费PDF全文 The southern Australian whelk, Dicathais orbita, is a potential candidate for aquaculture, as both seafood and for bioactive compound production. Larval rearing experiments to determine the effects of temperature and diet on the growth and survival of D. orbita larvae under laboratory conditions comprised five different unicellular algal diets of two brown algal species; Isochysis galbana and Chaetoceros muelleri, two green algae; Tetraselmis seucica and Nannochloropsis oculata, and a mixture of all four strains for larvae maintained at 16 and 22°C. Absolute growth, specific growth rate (SGR) and survival were determined regularly. Larvae reared at 22°C on a mixed diet, or brown algae, performed significantly better than those reared on green algal diets alone. Preliminary trials with settlement cues were undertaken on different aged larvae to determine when larvae become competent. An array of natural cues (carrion, Xenostrobus pulex, adult mucus and Ulvella lens), as well as concentrations of KCl was tested. KCl(concentration of 20 mM) induced the greatest settlement, however, no larvae metamorphosed under the conditions provided. This study confirms long‐lived planktotrophic larval development for Dicathais orbita with higher development rates at the higher water temperatures. Further studies will optimize culture conditions and cues for settlement and metamorphosis. 相似文献
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斑节对虾仔虾发光病治疗方法的初步研究 总被引：3，自引：1，他引：2
用二氧化氛、硫酸铜、甲醛、土霉素、氯霉素、红霉素,进行治疗斑节对虾仔虾发光病的试验,结果表明1g／m3二氧化氛、30ml／m3甲醛可以杀灭斑节对虾仔虾发光病的病原体。其他几种药物治疗效果不明显。 相似文献
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This study evaluated the lipid content and fatty acid (FA) profile of the hepatopancreas, ovaries and tail muscle of Lysmata amboinensis broodstock, as well as newly hatched larvae subjected to a period of starvation or feed from hatch to Zoea 2. The hepatopancreas had a high lipid content, confirming its role as a process and storage organ in L. amboinensis. Lipids were also a major component of ovarian dry weight, in agreement with reports on other crustaceans during maturation. The tail muscle, being a functional rather than a storage organ, contained low total lipids and was the tissue that closely resembled the FA profile of the newly hatched larvae. Saturated fatty acids (SFAs) and highly unsaturated fatty acids (HUFAs) were the most abundant components of the lipid profiles in broodstock and larvae. The HUFAs docosahexaenoic and eicosapentaenoic were preferentially retained during nutritional stress, confirming their importance for marine cleaner shrimp during early larval development. It appeared polyunsaturated fatty acid and HUFA requirements were met through the larval diet. The SFAs stearic and palmitic were abundant in adult tissues and larvae, whereas monounsaturated fatty acids may have been preferentially catabolized to meet energetic and metabolic larval requirements. 相似文献
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试验结果表明，采自盐度16水体中的才女虫（Polydora sp.)幼虫，其24h存活盐幅为40－3；采自盐度5水体中的才女虫幼虫，其24h存活盐幅为15－3。盐度16水体中的才女虫幼虫经过逐步驯化后，盐度生态幅增大，其24h安全存活盐幅为50－2。 相似文献
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提高卤虫休眠卵孵化率的技术因子探讨 总被引：3，自引：1，他引：3
卤虫休眠卵的孵化是目前海水鱼虾育苗工作中的活饵料供应体系，本文结合上海地区低盐度海水对虾育苗工作，经多年实验观察，归纳总结提高卤虫休眠卵孵化率的主要技术措施，其中包括孵化设备装置、水质控制、加快脱壳处理、以及鉴别卵的质量标志等 相似文献