R. Whitman, J. M. Inglis, W. J. Clark, R. W. Clary
{"title":"An Inexpensive and Simple Elutriation Device for Separation of Invertebrates from Sand and Gravel","authors":"R. Whitman, J. M. Inglis, W. J. Clark, R. W. Clary","doi":"10.2307/1467091","DOIUrl":null,"url":null,"abstract":"A new device for separation of stream invertebrates is described and its performance evaluated. The \"cone elutriator\" consists of a Schleicher and Schuell filtering apparatus attached to a standard Imhoff cone. Excellent recovery of organisms, ranging in length from 0.7 to 26 mm, was observed. Mean recovery from sand (excluding molluscs) was 93% and 98% from gravel. It appears that cross-sectional density is more important than the size of an organism in elutriation yield. Except for molluscs, no significant differences between sand and gravel extractions were observed (p=0.01).","PeriodicalId":154110,"journal":{"name":"Freshwater Invertebrate Biology","volume":"94 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1983-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"13","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Freshwater Invertebrate Biology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.2307/1467091","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 13
Abstract
A new device for separation of stream invertebrates is described and its performance evaluated. The "cone elutriator" consists of a Schleicher and Schuell filtering apparatus attached to a standard Imhoff cone. Excellent recovery of organisms, ranging in length from 0.7 to 26 mm, was observed. Mean recovery from sand (excluding molluscs) was 93% and 98% from gravel. It appears that cross-sectional density is more important than the size of an organism in elutriation yield. Except for molluscs, no significant differences between sand and gravel extractions were observed (p=0.01).
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