| 000 | 00000nam 2200000zi 4500 |
| 001 | 9.873237 |
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| 003 | CaOODSP |
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| 005 | 20241203113648 |
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| 006 | m o d f |
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| 007 | cr ||||||||||| |
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| 008 | 190517s1989 oncbd #ob f000 0 eng d |
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| 040 | |aCaOODSP|beng|erda|cCaOODSP |
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| 041 | |aeng|bfre |
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| 043 | |anl----- |
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| 086 | 1 |aEn13-5/89-02E-PDF |
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| 100 | 1 |aReynoldson, Trefor B., |eauthor. |
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| 245 | 10|aDevelopment of a benthic invertebrate objective for mesotrophic Great Lakes / |cTrefor B. Reynoldson, D.W. Schloesser and B.A. Manny. |
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| 264 | 1|aBurlington, Ontario, Canada : |bNational Water Research Institute, Lakes Research Branch, Canada Centre for Inland Waters, |c[1989] |
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| 300 | |a1 online resource (29 unnumbered pages) : |bmaps, graphs. |
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| 336 | |atext|btxt|2rdacontent |
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| 337 | |acomputer|bc|2rdamedia |
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| 338 | |aonline resource|bcr|2rdacarrier |
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| 490 | 1 |aNWRI contribution ; |v89-02 |
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| 500 | |aTitle from cover. |
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| 500 | |aDigitized edition from print [produced by Environment and Climate Change Canada]. |
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| 504 | |aIncludes bibliographical references. |
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| 520 | 3 |a"The desirable characteristics of a biological indicator of mesotrophic conditions are: that it should provide an appropriate and interpretable endpoint; that it should be achievable if corrective measure are taken, that is it should be within the environmental continuum; and that progress towards the objective can be measured. Historical data bases from the Great Lakes suggest that Hexagenia limbata, provides an appropriate endpoint, that the tubificid oligochaete community can be used to determine recovery, and data from other systems shows that Hexagenia can return to locations where it was formerly abundant"--Abstract. |
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| 546 | |aIncludes abstract, management perspective and executive summary in English and French. |
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| 692 | 07|2gccst|aEnvironmental indicators |
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| 692 | 07|2gccst|aLakes |
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| 693 | 4|aHexagenia limbata |
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| 700 | 1 |aSchloesser, Donald W., |eauthor. |
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| 700 | 1 |aManny, Bruce A., |eauthor. |
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| 710 | 1 |aCanada. |bEnvironment Canada. |
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| 710 | 2 |aNational Water Research Institute (Canada). |bLakes Research Branch. |
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| 710 | 2 |aCanada Centre for Inland Waters. |
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| 830 | #0|aNWRI contribution ;|v89-02.|w(CaOODSP)9.844121 |
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| 856 | 40|qPDF|s1.88 MB|uhttps://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-89-02-eng.pdf |
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