Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
UPTAKE RATES OF FOOD-CHAIN AND WATERBORNE MERCURY BY FISH - FIELD-MEASUREMENTS, A MECHANISTIC MODEL, AND AN ASSESSMENT OF UNCERTAINTIES
Autore:
POST JR; VANDENBOS R; MCQUEEN DJ;
Indirizzi:
UNIV CALGARY,DIV ECOL CALGARY AB T2N 1N4 CANADA YORK UNIV,DEPT BIOL TORONTO ON M3J 1P3 CANADA
Titolo Testata:
Canadian journal of fisheries and aquatic sciences
fascicolo: 2, volume: 53, anno: 1996,
pagine: 395 - 407
SICI:
0706-652X(1996)53:2<395:UROFAW>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
TROUT SALVELINUS-NAMAYCUSH; PERCH PERCA-FLAVESCENS; WALLEYE STIZOSTEDION-VITREUM; BASS MICROPTERUS-DOLOMIEUI; PRECAMBRIAN SHIELD LAKES; WABIGOON RIVER SYSTEM; YELLOW PERCH; SALMO-GAIRDNERI; RAINBOW-TROUT; ONTARIO LAKES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
66
Recensione:
Indirizzi per estratti:
Citazione:
J.R. Post et al., "UPTAKE RATES OF FOOD-CHAIN AND WATERBORNE MERCURY BY FISH - FIELD-MEASUREMENTS, A MECHANISTIC MODEL, AND AN ASSESSMENT OF UNCERTAINTIES", Canadian journal of fisheries and aquatic sciences, 53(2), 1996, pp. 395-407

Abstract

We develop a model of mercury uptake by age-0 yellow perch, Perca flavescens, through consumption and respiration, based on a published species- and age-specific bioenergetics model and published mercury kinetics models. We use the model in conjunction with field estimates of growth, diet, temperature experience, and mercury concentration to examine the seasonal patterns in methyl mercury uptake through respiration and through the food chain, and loss rates through depuration. Seasonal variation in environmental temperature, body size, diet, and prey availability create seasonal variation in the rate of methyl mercury uptake and in the proportion of uptake from aqueous and food sources. Methyl mercury uptake was primarily from aqueous sources during the spring and fall and was dominated by food sources in the summer. Key uncertainties in our understanding of the processes of mercury uptake by fish include (i) quantitative relationships between water chemistry and respiratory uptake, (ii) quantitative estimates of intestinal tract methylation, (iii) empirical measures of the allometry of mercury depuration, and (iv) the degree of seasonal variability in mercury speciationand methylation-demethylation processes. These uncertainties hinder our ability to more fully understand and quantify the sources and pathways of uptake of mercury by fish.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 20:03:50