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Titolo:
TRANSFER OF MERCURY FROM BENTHIC INVERTEBRATES TO FISHES IN LAKES WITH CONTRASTING FISH COMMUNITY STRUCTURES
Autore:
WONG AHK; MCQUEEN DJ; WILLIAMS DD; DEMERS E;
Indirizzi:
UNIV TORONTO,DIV LIFE SCI,1265 MIL TRAIL SCARBOROUGH ON M1C 1A4 CANADA YORK UNIV,DEPT BIOL N YORK ON M3J 1P3 CANADA
Titolo Testata:
Canadian journal of fisheries and aquatic sciences
fascicolo: 6, volume: 54, anno: 1997,
pagine: 1320 - 1330
SICI:
0706-652X(1997)54:6<1320:TOMFBI>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
TROUT SALVELINUS-NAMAYCUSH; PRECAMBRIAN SHIELD LAKES; WALLEYE STIZOSTEDION-VITREUM; PIKE ESOX-LUCIUS; ONTARIO LAKES; ENVIRONMENTAL-FACTORS; NORTHERN MANITOBA; SUNFISHES LEPOMIS; WHITE SUCKER; FOOD;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
51
Recensione:
Indirizzi per estratti:
Citazione:
A.H.K. Wong et al., "TRANSFER OF MERCURY FROM BENTHIC INVERTEBRATES TO FISHES IN LAKES WITH CONTRASTING FISH COMMUNITY STRUCTURES", Canadian journal of fisheries and aquatic sciences, 54(6), 1997, pp. 1320-1330

Abstract

We examined the flow of mercury (Hg) from benthic invertebrates to fishes in lakes with contrasting fish community structure. The study wascarried out in two whole lakes in southcentral Ontario in 1992. Both were remote from direct sources of contamination and were chosen because of their physical and chemical similarities. Although the fish communities in the mio lakes were qualitatively similar, the total number of fishes in Ranger Lake was an order of magnitude smaller than that in Mouse Lake. As a result of the lower net predation from benthivorousfishes, documented in earlier studies, Ranger Lake benthic invertebrate populations were significantly higher. However, benthic invertebrate taxa in Mouse Lake were generally larger and had higher Hg concentrations. This was partly attributed to the stunted growth of Mouse Lake fishes, which did not allow them to prey on larger benthos as a resultof gape limitations. Despite the lower Hg concentrations in Ranger Lake benthos, total benthic invertebrate Hg pools were higher in this lake as a result of its higher total benthic invertebrate biomass. However, the transfer of total Hg from benthic invertebrates to fishes was higher in Mouse Lake due to the higher consumption rates of benthivorous fishes.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/11/20 alle ore 14:41:08