00000nam 2200000za 4500 9.847975 CaOODSP 20241203113640 cr ||||||||||| 171128s1985 onca|||fo f000 0 eng d CaOODSP eng eng fre n-cn-on En13-5/85-65E-PDF Barton, D. R. (David Remle) Life cycles reproduction and diets of Dina dubia and Erpobdella punctata (Hirudinea: Erpobdellidae) in Canagagigue Creek, Ontario [electronic resource] / D.R. Barton and J.L. Metcalfe. Burlington, Ont. : Environmental Contaminants Division, National Water Research Institute, Canada Centre for Inland Waters, [1985]. 29, [3] p. : ill. NWRI contribution ; no. 85-65 "Division Control No. ECD-112B". "This manuscript has been submitted to Canadian Journal of Zoology for publication and the contents are subject to change". Published Can. J. Zool. 64(3): 640-648. 1986. Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "In recent work on Canagagigue Creek, we found that leeches contained residues of chlorophenols from 10 to lO0X higher other benthic invertebrates and fish. There is evidence from the literature that leeches have a considerable bioaccumulation capacity for other synthetic organic such as DDT and mirex, and even metals. We have therefore suggested that leeches may serve as excellent 'early warning' indicators of contamination, and have recommended their use in biomonitoring. In order to determine pathways for the bioaccumulation of contaminants by these organisms, details of their life histories (e.g. trophic status, longevity) must be known. Unfortunately, the biology of Canadian leech species is poorly known. The present study, believed to be the first of its kind in eastern Canada, provides background information on the reproduction, growth, life cycles and food habits of two species of leeches in an Ontario stream"--Management perspective. Includes executive summary, management perspective, and abstract in French. gccst Water management gccst Aquatic animals Metcalfe-Smith, J. L. (Janice L.) Canada. Environment Canada. National Water Research Institute (Canada) NWRI contribution ; no. 85-65 (CaOODSP)9.844121 PDF 2.42 MB https://publications.gc.ca/collections/collection_2017/eccc/En13-5-85-65-eng.pdf