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Titolo:
EFFECTS OF STARVATION ON IRON CONCENTRATION AND DEPOSITION IN TISSUESOF LARVAL LAMPREYS, PETROMYZON-MARINUS L - MORPHOLOGICAL AND QUANTITATIVE-ANALYSES
Autore:
YOUSON JH;
Indirizzi:
UNIV TORONTO,DIV LIFE SCI,SCARBOROUGH CAMPUS W HILL M1C 1A4 ONTARIO CANADA UNIV TORONTO,DEPT ZOOL W HILL M1C 1A4 ONTARIO CANADA
Titolo Testata:
Canadian journal of zoology
fascicolo: 10, volume: 71, anno: 1993,
pagine: 2018 - 2032
SICI:
0008-4301(1993)71:10<2018:EOSOIC>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
OXYGEN DISSOCIATION CURVES; ANADROMOUS SEA LAMPREYS; NON-HAEM IRON; GEOTRIA-AUSTRALIS; ADULT LAMPREYS; BILE-DUCTS; BILIARY ATRESIA; FERRIC IRON; LIFE-CYCLE; LIVER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
64
Recensione:
Indirizzi per estratti:
Citazione:
J.H. Youson, "EFFECTS OF STARVATION ON IRON CONCENTRATION AND DEPOSITION IN TISSUESOF LARVAL LAMPREYS, PETROMYZON-MARINUS L - MORPHOLOGICAL AND QUANTITATIVE-ANALYSES", Canadian journal of zoology, 71(10), 1993, pp. 2018-2032

Abstract

Light and electron microscopy, inductively coupled plasma atomic emission spectroscopy, and a biochemical assay were used to compare tissuedistribution and concentration of iron in larval lampreys (Petromyzonmarinus) under conditions of long-term starvation and feeding in the laboratory and in recently captured individuals. There were higher values for serum iron, red blood cell numbers, and haemoglobin in nonfeeding animals compared with the field-sample individuals. Iron concentration was similar in most tissues and organs of the two laboratory-heldgroups and significantly higher than in similar samples of recently captured individuals. This difference was due to heavy deposition of ferric iron in primary sites of adipose tissue and, to a lesser degree, to deposits of this metal in the liver. Electron microscopy of hepatocytes of starved animals showed both ferric and ferrous iron in dense bodies, ferric iron in the cytoplasmic matrix, an increased role for the cells in carbohydrate metabolism, and some signs of bile stasis. Extended laboratory holding of larvae in both presumed fed and nonfed conditions results in alteration in blood and tissue concentrations of iron that are more likely a result of alterations in metabolism and excretion than a result of uptake of the metal from the environment.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 06/07/20 alle ore 08:59:55