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1991年江苏省如东县对虾综合养殖场承担了《对虾与文蛤混养》研究项目,在总水面为3151.9亩的对虾池中进行了中国对虾与文蛤进行混养,加强 相似文献
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对虾池混养文蛤的技术 总被引：2，自引：0，他引：2
对虾池的综合利用是近年来提高虾池整体经济效益的热门话题。国内外已有在虾池内混养鱼蟹的报道。在虾池中混养文蛤,具有生长速度快,出肉率高,不与对虾争饵,还能起到部分净化水质的作用。每亩虾池投放100公斤文蛤苗种,可生产供出口的商品贝200公斤以上,纯获利300元,经济价值很高。现将虾池中混养文蛤的技术简介如下。 相似文献
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地处瓯江口的灵昆镇对虾塘里，人头攒动，耙的耙，挑的挑，一片繁忙景象。从元月下旬始，灵昆虾塘混养的文蛤源源不断地出口日本，以肉多味鲜美深受客商好评。据灵昆实验农场负责人介绍，文蛤扎根灵昆养殖已有二十来年历史，以“天下第一鲜”而著称，每次在春节前出口日本... 相似文献
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对虾与文蛤混养效益大 总被引：2，自引：1，他引：2
《水产科学》1993,(4)
庄河县青堆水产公司虾场,1992年在一部分虾池进行对虾与文蛤混养,获得了双丰收,提高了经济效益。他们1992年11月下旬从山东购入3cm左右(166粒/kg)的文蛤苗种108.76吨,投放到8个虾池,总面积为670亩,净面积(实播面积)为221.1亩。经过5个多月的养成,于10 相似文献
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三疣梭子蟹与不同虾类混养技术研究 总被引：1，自引：0，他引：1
分别利用中国明对虾、凡纳滨对虾、日本囊对虾和脊尾白虾等虾类与三疣梭子蟹进行混养。结果表明:日本囊对虾与三疣梭子蟹混养组三疣梭子蟹养殖单产最高,平均产量1678.5 kg/hm2,其次为凡纳滨对虾与三疣梭子蟹混养组,平均产量1659 kg/hm2。对虾养殖单产以凡纳滨对虾与三疣梭子蟹混养组最高,平均产量990 kg/hm2,其次为中国明对虾与三疣梭子蟹混养组,平均产量952.5 kg/hm2。但考虑到日本囊对虾市场售价为其他混养虾类的两倍,因而日本囊对虾与三疣梭子蟹混养组养殖效益最高。 相似文献
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养虾池底播魁蚶技术研究 总被引：3，自引：0，他引：3
对养虾池混养魁蚶的底质选择、播苗密度、苗种规格、池水调近和魁蚶在虾池中越冬等进行了试验研究，２７０亩混养试验池，平均亩产对虾１０６．３ｋｇ，魁蚶１２４．１ｋｇ，混养比单养平均亩增效益１４３８．４元，总增效益３８．８４万元。技术鉴定认为：本研究成果属国内领先水平。 相似文献
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利用生物改善虾池底质试验 总被引：7，自引：0，他引：7
在老化污染虾池中移植沙蚕等底栖生物，明显改善了虾池底质。１９９３、１９９４年试验池比对照池分别增产４０．５％和５８．５％，平均规格大０．６９ｃｍ和０．４１ｃｍ，成活率提高１９％和８．１％。１９９４年１２月专家鉴定认为，本试验居国内领先水平。 相似文献
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A polyculture study was conducted in southwest Louisiana comparing production of Malaysian prawns, Macrobrachium rosenbergii , in monoculture and polyculture with Golden shiners, Notemigonus crysoleucas .
This test revealed stocking of shiners at 24.7/m2 with prawns at 4.4/m2 resulted in increased total pond production over monoculture of prawns at 4.4/m2 with equal prawn yields in both systems and little increase in labor. Feeding rates were based on prawn biomass. Food conversion ratios ranged from 0.5 to 1.0 in polyculture and 0.9 to 1.1 in monoculture when total production was considered. Prawn production averaged 640 kg/ha in polyculture and 629 kg/ha in monoculture. Mean size of prawns was 19 g in polyculture and 20 g in monoculture. The polyculture of shiners with prawns added an average of 307 kg/ha of the bait fish to pond production.
Shiners did not compete seriously with prawns when stocked at these rates. This practice could result in added revenues to producers culturing these species together. 相似文献
This test revealed stocking of shiners at 24.7/m
Shiners did not compete seriously with prawns when stocked at these rates. This practice could result in added revenues to producers culturing these species together. 相似文献
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鲈与中国对虾混养试验 总被引：1，自引：0，他引：1
１９９５、１９９６年进行鲈与中国对虾混养试验，利用鲈摄食病虾及小型糠虾类，阻断病毒传播，推迟了对虾发病，试验池产量，效益成活率均高于对照池。 相似文献
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在面积6.7 hm^2,水深1.5～2.0 m的池塘中进行海蜇—中国明对虾—缢蛏—褐牙鲆综合养殖,在4—9月养殖周期内,采用碳氮稳定同位素法和IsoSource线性混合模型计算各种饵料对海蜇、中国明对虾、缢蛏和褐牙鲆的平均饵料贡献率,以探讨综合养殖池溏的营养级和池塘食物网结构。试验结果表明,海蜇的主要食物来源为投喂的轮虫;中国明对虾的食物来源为鳀鱼、虾夷扇贝下脚料和蜢虾;缢蛏的主要食物来源为底栖硅藻,其次为中国明对虾与褐牙鲆粪便;褐牙鲆的主要食物来源为中国明对虾,其次为虾夷扇贝下脚料和鳀鱼。海蜇的营养级为2.09～3.43,平均值为2.81;中国明对虾的营养级为3.11～4.04,平均值为3.72;缢蛏的营养级为2.37～2.94,平均值为2.62;褐牙鲆的营养级为2.63～3.83,平均值为3.42。综合分析发现,海蜇摄食浮游动物,缢蛏滤食底栖硅藻,中国明对虾和褐牙鲆摄食投喂的虾夷扇贝下脚料和鳀鱼,褐牙鲆也摄食部分中国明对虾,两者的粪便不仅为浮游单胞藻和底栖硅藻生长提供营养,还为缢蛏提供了饵料。上述研究结果为多品种海水综合养殖池塘的生态健康养殖提供科学依据。 相似文献
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Sediment samples were collected from 42 catfish (Clarias hybrid) ponds, 40 freshwater prawn (Macrobrachium rosenbergii) ponds and 18 carp (Puntius spp.) ponds in Thailand. Regression analysis revealed that pond age (1–30 years) was not a major factor influencing the physical and chemical composition of pond sediments. Sediment depth, F+S horizon thickness and bulk density of S horizon were greater (P<0.05) in carp ponds than in catfish and prawn ponds. This occurred because sediment was removed from catfish and prawn ponds more frequently than from carp ponds. Total carbon, organic carbon and total nitrogen concentrations were greater (P<0.05) in carp ponds than prawn and catfish ponds. Few ponds had sediment organic carbon concentrations above 3%, and carbon:nitrogen ratio values did not differ (P>0.05) among ponds for the three species. Total phosphorus and other sediment phosphorus fractions increased in the order prawn ponds, carp ponds and catfish ponds. Sediment sulphur concentrations also increased in the same order. There were no differences in major or minor nutrient concentrations in sediment that would influence aquacultural production. Although there were significant correlations (P<0.05) between various sediment quality variables, no single variable or group of variables would be useful in estimating sediment quality. Pond bottom management practices used by producers in Thailand included drying of pond bottoms between crops, liming, tilling and periodic sediment removal. These practices have maintained relatively good bottom quality. They should be continued in Thailand and adopted in other places. 相似文献
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对连云港市宋庄镇有机海水养殖基地的海水围塘南美白对虾—缢蛏—梭鱼混养系统和南美白对虾单养系统的能量收支与利用效率进行了研究。结果表明,在有机水产养殖方式下,混养系统中能量输入、输出分别为10.54和8.37MJ/m2,单养系统能量输出、输入分别为13.45和10.72MJ/m2。混养系统的光能利用率、光合能转换效率、生物能转换效率、总能转化率和底泥沉积率分别为0.18%、34.51%、48.11%、16.89%和62.41%,单养系统相对应的数据分别为0.19%、24.95%、24.04%、11.17%和68.54%。混养系统除光能利用率外,其他指标均优于单养系统,底泥沉积率亦小于单养系统。从综合生态经济指标来看,混养系统也优于单养系统,但2者综合生态经济指标(EY)均小于1,混养和单养系统都具有提高经济效益和生态效益的潜力。 相似文献
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Effects of Culture Area,Stocking Density,and Shrimp and Fish Polyculture on the Cost Efficiency of Hard Clam,Meretrix meretrix,Culture: A Case Study of Hard Clam Farms in Yunlin,Taiwan 
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下载免费PDF全文 Jung‐Fu Huang Ming‐Tao Chou Jie‐Min Lee Yung‐Hsin Cheng 《Journal of the World Aquaculture Society》2016,47(4):481-495
Using the hard clam farms in Yunlin, Taiwan as examples, this study analyzes the effects of culture area, stocking density, and shrimp and fish polyculture on the cost efficiency (CE) of hard clam farming. A data envelopment analysis (DEA) is used to estimate the farms' technical efficiency (TE), allocative efficiency (AE), and CE values. The findings show that the mean TE, AE, and CE values of hard clam farms are 0.74, 0.57, and 0.43, respectively. The TE value is higher than the AE value, which indicates that cost inefficiency is mainly attributable to poor AE. Tobit regression results suggest that there are positive relationships between CE and both culture area and operator experience. Hard clam stocking density and age of the operators have negative effects on CE. Hard clam culture areas larger than 2 ha and a stocking density of 1.1–1.2 million hard clams per hectare have higher CEs than smaller culture areas and smaller or larger stocking densities. The use of sand shrimp, white shrimp, kuruma shrimp, and grass shrimp for polyculture and the use of milkfish and silver sea bream for polyculture are both associated with high CEs. 相似文献
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在3口面积各为0.3 hm^2、深度2.0 m的长方形池塘(1#、2#、3#)中放入体长0.7～0.8 cm的罗氏沼虾"南太湖2号"无特定病原种虾,密度为3.0×10~5尾/hm^2;养殖30 d时,2#、3#池塘分别混养质量3～4 g/尾的鲫鱼450、900尾,1#池塘不混养作对照组。经过近110 d的培育,1#、2#、3#池塘"南太湖2号"种虾的平均体质量分别达18.36、18.95、22.6 g,收获量分别达931.5、898.4、842.95 kg,饵料系数分别为1.36、1.53和1.71。试验结果表明,罗氏沼虾"南太湖2号"种虾培育池塘混养合理密度的鲫鱼,虽然影响种虾养殖产量,饲料系数增大,但培育出的种虾个体较大,饱满度较高,作为亲本可以为后期育苗工作的顺利开展打下良好基础。 相似文献