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Titolo:
LEECHES AS INDICATORS OF DIETARY MERCURY EXPOSURE IN NON-PISCIVOROUS WATERFOWL, IN CENTRAL ONTARIO, CANADA
Autore:
MCNICOL DK; MALLORY ML; MIERLE G; SCHEUHAMMER AM; WONG AHK;
Indirizzi:
CANADIAN WILDLIFE SERV,49 CAMELOT DR NEPEAN ON K1A 0H3 CANADA ONTARIO MINIST ENVIRONM & ENERGY,DORSET RES CTR DORSET ON P0A 1E0 CANADA NATL WILDLIFE RES CTR,CANADIAN WILDLIFE SERV HULL PQ K1A 0H3 CANADA UNIV TORONTO,DIV LIFE SCI TORONTO ON M1C 1A4 CANADA
Titolo Testata:
Environmental pollution
fascicolo: 2, volume: 95, anno: 1997,
pagine: 177 - 181
SICI:
0269-7491(1997)95:2<177:LAIODM>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
BASS MICROPTERUS-DOLOMIEUI; PRECAMBRIAN SHIELD LAKES; LOW PH LAKES; ACIDIFICATION; TOXICITY; FISH; DEPOSITION; CALCIUM; METALS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
34
Recensione:
Indirizzi per estratti:
Citazione:
D.K. Mcnicol et al., "LEECHES AS INDICATORS OF DIETARY MERCURY EXPOSURE IN NON-PISCIVOROUS WATERFOWL, IN CENTRAL ONTARIO, CANADA", Environmental pollution, 95(2), 1997, pp. 177-181

Abstract

We collected and analysed 113 leeches (Hirudinea) from 17 small lakesin the acid-stressed Muskoka region of central Ontario, Canada to examine the relationship between lake chemistry and mercury (Hg) concentrations in leeches, and thus determine whether leeches and other benthic invertebrates posed a dietary risk of Hg exposure for non-piscivorous waterfowl. Hg concentrations in leeches were generally low and only a few-fold above the detection limit (0.78 ng g(-1) wet weight (ww)). Mean Hg concentration in the bloodsucker Macrobdella decora was 6.94 +/- 0.78 SE ng g(-1) ww (n = 49) and was 5.98 +/- 0.46 ng g(-1) ww (n =64) in the scavenger Percymoorensis marmoratis. Leech Hg concentrations were correlated with calcium and dissolved organic carbon concentrations in the water, respectively. These data suggest that leeches are not suitable monitors of Hg (usually as methylmercury) biomagnification in central Ontario lakes, and do not pose a dietary risk to non-piscivorous waterfowl. (C) 1997 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 19:49:50