放养河蟹对黑龙江东湖水库底栖动物和水生维管束植物的影响
EFFECTS OF STOCKING CHINESE MITTEN CRAB ON THE ZOOBENTHOS AND AQUATIC VASCULAR PLANT IN THE EAST LAKE RESERVOIR, HEILONGJIANG,CHINA
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摘要: 在面积为2700hm2的东湖水库,以散养的方式养殖河蟹。在放养密度不同的情况下,研究放养河蟹对水库中底栖动物和水生植物的影响。2001年规格为220只/kg河蟹放养量为1500kg、密度为122只/hm2时,对摇蚊幼虫和寡毛类影响显著,而对其他软体动物和水生植物无显著影响。2002年同样规格的河蟹放养量增加至3500kg、密度为285只/hm2时,对底栖动物和部分沉水植物影响显著。本文对河蟹养殖容量作了讨论,认为东湖水库散养河蟹的放养量不应超过1500kg。Abstract: Chinese mitten crab was stocked in the East Lake Reservoir with area of 2700 hm2. The zoobenthos and aquatic plantswere measured before and after stocking crab,and the effects of the crab on the zoobenthos and aquatic plants were studied by theway of ANOVA. The Chinese mitten crab carrying capacityof reservoirs and lakes depends on the biomass of different zoobenthosand macrophytes. The study also analyses the crab food selection of different natural diets in East Lake Reservoir. In 2001,withstocking amount of crab of 1500kg,the mitten crab(220ind1kg-1) had noticeable effects on chironomus and oligotricha,and littleeffect on other mollusca and aquatic plant,at the stocking density of 122ind1hm-2. In 2002,with stocking amount of crab of 3500kg,the mitten crab of same size(220ind1kg-1) had significant effects on zoobenthos and some submersed macrophyte, at thestocking density of 285ind1hm-2. The ideal stocking amount is that,after stocking crabs,the structure and function of aquaticecosystem still can be maintained,the food resources of the crab were not damaged seriously,particularly the zoobenthos and submersed macrophyte. Therefore,the carrying capacity,in large lakes and reservoirs,is defined as the maximal standing biomass ofthe crab in the case that the growth of aquatic vegetation and zoobenthos were not significantly affected by the crab. The authorsthink that the stocking amount of crabof East Lake Reservoir should not be beyond 1500kg. The researchof crab carrying capacity in East Lake Reservoir gives an exploration sample of other waste shallow water area in high frigid zone.
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[1] East Lake Reservoir management department. The design report of reinforcing dikes and damsof East Lake Reservoir[R].2000,3-15[东湖水库管理处. 东湖水库消险加固设计报告.2000,3-15]
[2] Xie P,Cui YB. Biodiversity in the lakes along the Middle Reachesofthe Yangtze River and fishery development [J]. Acta HydrobiologicaSinica,1996,20(Suppl.):1-5[谢平,崔奕波. 长江中下游湖泊生物多样性与渔业发展.水生生物学报,1996,20 (增刊):1-5]
[3] Jin G,Li ZJ,X P. Studieson the Carrying Capacityof Chinese MittenCarb(Eriocheir sinensis-in Macrophytic Lakes. Acta HydrobiologicaSinica,2003,27(4):345-351[金刚,李钟杰,谢平. 草型湖泊河蟹养殖容量初探. 水生生物学报,2003,27:345-351]
[4] Zhang GH, Gao WX, Chen YY. Effects of fish stocking on lakeecosystems in China[J]. Acta Hydrobiologica Sinica,1997,21(3):271-280[张国华,曹文宣,陈宜瑜. 湖泊放养渔业对我国湖泊生态系统的影响. 水生生物学报,1997,21(3):271-280]
[5] Zhu XM,Cui Y B,Guang SH. Food selection and digestibilityof threenatural diets for the Chineses mitten crab. Acta Hydrobiologica Sini2ca,1997,21(1):94-96[朱晓鸣,崔奕波,光寿红. 河蟹对三种天然饵料的选食性及消化率. 水生生物学报,1997,21 (1):94-96]
[6] Chen B L,Du N S,Ye H F. Analysison the feeding habit of the mitten crab Eriocheir sinensis. Fisheries Science and Technology Informa2tion,1989,16(1):2-5[陈炳良,堵南山,叶鸿发. 河蟹的食性分析. 水产科技情报,1989,16(1):2-5]
[7] Frechette MM. Carrying capacity and dencity dependence. ICES MarSci Symp,1991,192:78
[8] Carver C E,Mallet A L. Assessing the carrying capacity of a coastalinlet inntermsofmussel culture. Aquacuture,1990,88(3):39-53
[9] Zu G Z,Utilization and protection of submerged plant resources bypencrab culturing in Nushan Lake. Journal of Lake Science,1999,11(1):91-96[祖国掌. 围栏养蟹利用与女山湖沉水植物资源保护. 湖泊科学,1999,11(1):91-96]
[10] Zhang ZS,Wu SJ.Studieson stocking Chinese mitten crab and utiliza2tion of macrophytic resource in lake Gucheng.Freshwater Fisheris,1994,24(suppl.):21-25[张宗涉,吴斯锦. 固城湖河蟹放养和水草资源利用探讨.淡水渔业,1994,24(增刊):21-25]
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