Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Uptake and effects of nitrite in the marine teleost fish Platichthys flesus
Autore:
Grosell, M; Jensen, FB;
Indirizzi:
Odense Univ, Inst Biol, Ctr Resp Adaptat, DK-5230 Odense M, Denmark OdenseUniv Odense Denmark M Ctr Resp Adaptat, DK-5230 Odense M, Denmark
Titolo Testata:
AQUATIC TOXICOLOGY
fascicolo: 1-2, volume: 50, anno: 2000,
pagine: 97 - 107
SICI:
0166-445X(200008)50:1-2<97:UAEONI>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
FRESH-WATER CRAYFISH; ACID-BASE-BALANCE; RAINBOW-TROUT; ASTACUS-ASTACUS; SEA-WATER; TOXICITY; NITRATE; BLOOD; CARP; ION;
Keywords:
European flounder; Platichthys flesus; marine teleost; nitrite (NO2-); methemoglobin; hyperkalemia; intestinal uptake; physiological disturbance;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Grosell, M McMaster Univ, Dept Biol, 1280 Main St W, Hamilton, ON L8S 4K1,Canada McMaster Univ 1280 Main St W Hamilton ON Canada L8S 4K1 Canada
Citazione:
M. Grosell e F.B. Jensen, "Uptake and effects of nitrite in the marine teleost fish Platichthys flesus", AQUAT TOX, 50(1-2), 2000, pp. 97-107

Abstract

The route of NO2 uptake and subsequent physiological effects were examinedin the marine teleost, European flounder (Platichthys flesus), during exposure to 1 mM ambient NO2- for up to 11 days. Drinking of seawater resulted in a similar nitrite concentration in the anterior part of the intestine asin the ambient water. The NO2- concentration decreased along the gastro-intestinal tract, suggesting NO2- uptake across the intestinal epithelium. Comparison of NO2- uptake in fish that drank NO2--contaminated seawater with fish that did not (i.e, had the intestine perfused with a NO2-free saline during NO2 exposure) revealed that the intestinal route contributed some 66%; of whole-body NO2 uptake. Plasma [NO2-] stayed below the ambient level. It reached a maximum of 0.35-0.4 mM on days 3-6 and then declined to 0.3 mM on day 11. The physiological effects of NO2- exposure were relatively minorcompared with those reported in freshwater fish. Blood methemoglobin levels increased from approximately 4% in non-exposed fish to a maximum of 18%, of total hemoglobin in exposed fish. An extracellular hyperkalemia was observed from day 3 of NO2- exposure, with a maximal increase in plasma K+ concentrations of 38%. No mortality occurred during the 11 days of NO2- exposure. The lack of mortality can be related to the relatively low NO2- accumulation in the plasma and the relatively minor physiological disturbances. (C)2000 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 00:00:27