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Titolo:
Metabolic enzyme activity during smolting in stream- and hatchery-reared Atlantic salmon (Salmo salar)
Autore:
Leonard, JBK; McCormick, SD;
Indirizzi:
Univ Massachusetts, Dept Biol, Amherst, MA 01003 USA Univ Massachusetts Amherst MA USA 01003 Dept Biol, Amherst, MA 01003 USA US Geol Survey, Conte Anadromous Fish Res Ctr, Biol Resources Div, TurnersFalls, MA 01376 USA US Geol Survey Turners Falls MA USA 01376 Div, TurnersFalls, MA 01376 USA
Titolo Testata:
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
fascicolo: 8, volume: 58, anno: 2001,
pagine: 1585 - 1593
SICI:
0706-652X(200108)58:8<1585:MEADSI>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
ONCORHYNCHUS-KISUTCH; COHO SALMON; NA+,K+-ATPASE ACTIVITY; LIPID-METABOLISM; SMOLTIFICATION; PARR; WILD; TRANSFORMATION; PERFORMANCE; SEAWATER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Leonard, JBK No Michigan Univ, Dept Biol, 1401 Presque Isle Ave, Marquette, MI 49855 USA No Michigan Univ 1401 Presque Isle Ave Marquette MI USA 49855
Citazione:
J.B.K. Leonard e S.D. McCormick, "Metabolic enzyme activity during smolting in stream- and hatchery-reared Atlantic salmon (Salmo salar)", CAN J FISH, 58(8), 2001, pp. 1585-1593

Abstract

To evaluate the metabolic differences between Atlantic salmon (Salmo salar) parr and smolts and the effect of rearing environment, we examined metabolic enzyme activity in white muscle, liver, and heart in stream- and hatchery-reared juveniles. Spring increases in gill Na+,K+-ATPase (3.5-fold) and cardiosomatic index (37-69%) and decreases in condition factor (similar to 17%) occurred in smolts, but not in parr. White muscle phosphofructokinase (PFK) increased during spring and was 3.6-fold higher in smolts than in parr by late spring. There were seasonal increases in liver citrate synthase (CS) (similar to 42%), liver beta- hydroxyacyl-coenzyme A dehydrogenase (HOAD) (similar to 60%), and heart CS (similar to 23%) and decreases in liver lactate dehydrogenase (LDH) (similar to 28%) in parr and smolts. Activity ofliver HOAD was greater in stream-reared smolts (similar to 18%) than in parr or hatchery smolts. Heart PFK activity increased during spring in wild-reared parr and smolts, while it decreased in hatchery-reared smolts. White muscle LDH and PFK increased earlier in spring in hatchery- than in stream-reared smolts. Our results suggest that increased heart size and high whitemuscle PFK occur during smolting and may be adaptive for downstream and ocean migration. Hatchery- and stream-reared Atlantic salmon differ in the timing of metabolic changes during smolting, which may impact their long-termsurvival.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 09:45:20