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1、生态学杂志ChineseJournalofEcology摇2010,29(11):2187-2191摇摇摇摇摇摇摇摇摇摇摇摇摇*基于生态位和水质因子的草鱼两种混养模式的比较1,2111**111赵旭斌摇郁二蒙摇王广军摇谢摇骏摇余德光摇龚望宝摇王海英12(中国水产科学研究院珠江水产研究所,广州510380;上海海洋大学,上海201306)摘摇要摇试验通过模拟草鱼2种混养模式(“鲮鄄草模式冶为草鱼与鲮混养、“鲫鄄草模式冶为草鱼与鲫鱼混养),引入计算机视觉技术分析了草鱼在2种不同养殖模式下的生态位宽度及生态位重叠,同时测定了水体理化指标及鱼类特定生长率。结果表明:
2、“鲮鄄草模式冶组草-1鱼的特定生长率为1郾524%·d,显著高于“鲫鄄草模式冶组草鱼的特定生长率(1郾346%·-1d);“鲮鄄草模式冶组水体中的铵态氮、硝酸盐、总氮、总磷、活性磷酸盐浓度高于“鲫鄄草模式冶组,而pH、DO、亚硝酸盐浓度及叶绿素a含量低于“鲫鄄草模式冶组;2混养组中草鱼之间的生态位宽度无明显差异;“鲮鄄草模式冶组草鱼与鲮之间生态位重叠指数为0郾5598,“鲫鄄草模式冶组草鱼与鲫鱼之间的生态位重叠指数为0郾6478,二模式组比较,差异显著;鲮与草鱼之间的竞争较鲫鱼与草鱼之间的竞争小;试验组中鲮与草鱼混养要优于鲫鱼与草鱼混养。关键词摇混养模式;草
3、鱼;生态位宽度;生态位重叠;水质中图分类号摇Q959郾4摇文献标识码摇A摇文章编号摇1000-4890(2010)11-2187-05Acomparativestudyontwopolyculturemodesofgrasscarpbasesonecologicalnicheand1,2111waterqualityfactors.ZHAOXu鄄bin,YUEr鄄meng,WANGGuang鄄jun,XIEJun,YU1111De鄄guang,GONGWang鄄bao,WANGHai鄄ying(PearlRiverFisheriesResearchInsti
4、tute,2ChineseAcademyofFisheryScience,Guangzhou510380,China;ShanghaiOceanUniversity,Shanghai201306,China).ChineseJournalofEcology,2010,29(11):2187-2191.Abstract:Inthisstudy,twopolyculturemodesofgrasscarp(i.e.,polycultureofmudcarpandgrasscarpnamedas“mud鄄grassmode冶andpolycultureofcruc
5、iancarpandgrasscarpnamedas“crucian鄄grassmode冶)weresimulated,andthenichewidth,nicheoverlap,andspecificgrowthrateofgrasscarpaswellasthephysicalandchemicalindicesofwaterunderthetwopolyculturemodeswereanalyzed.Therewasnosignificantdifferenceinthenichewidthofgrasscarpbetweenthetwomodes,
6、butthenicheoverlapofgrasscarpwassignificantlydifferent,withthevaluebeing0.5598and0郾6478in“mud鄄grassmode冶and“crucian鄄grassmode冶,respectively.Thespecificgrowthrateofgrasscarpinmud鄄grassmodewas1郾524%perday,whichwasmuch+-higherthanthat(1郾346%perday)incrucian鄄grassmode.ThewaterNH鄄N,NO,T
7、N,TP,43andreactivephosphatecontentsinmud鄄grassmodewerehigherthanthoseincrucian鄄grass-mode,whilethewaterpHvalueandDO,NO,andchlorophyll鄄acontentswereinadverse.2Theseresultssuggestedthatthecompetitionbetweencruciancarpandgrasscarpwasmoreseverethanthatofmudcarpandgrasscarp,andmudcarpwa
8、smoresuitableforgrasscarpt
