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Titolo:
Plasma lactate and stress hormones in common carp (Cyprinus carpio) and rainbow trout (Oncorhynchus mykiss) during stepwise decreasing oxygen levels
Autore:
Vianen, GJ; Van den Thillart, GEEJM; Van Kampen, M; Van Heel, TI; Steffens, AB;
Indirizzi:
Leiden Univ, Dept Integrat Zool, Inst Evolutionary & Ecol Sci, Van Klaauw Labs, NL-2300 RA Leiden, Netherlands Leiden Univ Leiden Netherlands NL-2300 RA NL-2300 RA Leiden, Netherlands Univ Groningen, Dept Biol Anim Physiol, NL-9700 AA Haren, Netherlands UnivGroningen Haren Netherlands NL-9700 AA L-9700 AA Haren, Netherlands
Titolo Testata:
NETHERLANDS JOURNAL OF ZOOLOGY
fascicolo: 1, volume: 51, anno: 2001,
pagine: 33 - 50
SICI:
0028-2960(200103)51:1<33:PLASHI>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
SALMO-GAIRDNERI; ENERGY-METABOLISM; ENVIRONMENTAL HYPOXIA; ANAEROBIC METABOLISM; SUBSEQUENT RECOVERY; CORTISOL TREATMENT; DEEP HYPOXIA; EXPOSURE; FISH; GLUCONEOGENESIS;
Keywords:
common carp (Cyprinus carpio); rainbow trout (Oncorhynchus mykiss); hypoxia; anaerobic threshold; lactate; catecholamines; cortisol;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
42
Recensione:
Indirizzi per estratti:
Indirizzo: Vianen, GJ Leiden Univ, Dept Integrat Zool, Inst Evolutionary & Ecol Sci, Van Klaauw Labs, Kaiserstr 63,POB 9516, NL-2300 RA Leiden, Netherlands Leiden Univ Kaiserstr 63,POB 9516 Leiden Netherlands NL-2300 RA
Citazione:
G.J. Vianen et al., "Plasma lactate and stress hormones in common carp (Cyprinus carpio) and rainbow trout (Oncorhynchus mykiss) during stepwise decreasing oxygen levels", NETH J ZOOL, 51(1), 2001, pp. 33-50

Abstract

By measuring the lactate response it is possible to determine whether a teleost is able to adapt to a certain oxygen level. It is hypothesized that recovery will occur at oxygen levels above the critical oxygen level (PO2)(crit) reflected by a transient lactate increase. In contrast, continuous lactate accumulation occurs at oxygen levels below the (PO2)(crit), which willbe lethal in case of prolonged exposure. Since catecholamines as well as cortisol increase the availability of glucose, it is expected that these stress hormones are involved in the activation of the anaerobic metabolism. Common carp and rainbow trout were cannulated and exposed to stepwise decreasing oxygen levels. At each oxygen level blood samples were taken at severaltime-points and analyzed for plasma lactate, adrenaline, noradrenaline andcortisol. The results show that both individual and inter-specific differences in lactate response occur during exposure to hypoxia. These differences can be associated with observed differences in behaviour. Whereas carp stayed quiet during the hypoxia treatment, trout displayed individually different behaviour. In contrast to the passive responders, the active responding trout did not survive as a result of continuous lactate accumulation. Interestingly, both in carp and trout a strong correlation exists between the lactate and catecholamine levels. This may indicate that these stress hormones are of importance for the metabolic changes occurring during anaerobic activation.

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Documento generato il 24/11/20 alle ore 11:26:02