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Titolo:
Modelling the effects of capture and sea lice [Lepeophtheirus salmonis (Kroyer)] infestation on the cortisol stress response in trout
Autore:
Poole, WR; Nolan, D; Tully, O;
Indirizzi:
Univ Dublin Trinity Coll, Dept Zool, Dublin 2, Ireland Univ Dublin TrinityColl Dublin Ireland 2 , Dept Zool, Dublin 2, Ireland Salmon Res Agcy, Newport, Co Mayo, Ireland Salmon Res Agcy Newport Co Mayo Ireland Agcy, Newport, Co Mayo, Ireland Univ Nijmegen, Dept Anim Physiol, NL-6500 GL Nijmegen, Netherlands Univ Nijmegen Nijmegen Netherlands NL-6500 GL 0 GL Nijmegen, Netherlands
Titolo Testata:
AQUACULTURE RESEARCH
fascicolo: 11, volume: 31, anno: 2000,
pagine: 835 - 841
SICI:
1355-557X(200011)31:11<835:MTEOCA>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
TILAPIA OREOCHROMIS-MOSSAMBICUS; YEARLING COHO SALMON; RAINBOW-TROUT; ONCORHYNCHUS-KISUTCH; PLASMA-CORTISOL; INTERRENAL FUNCTION; FRESH-WATER; MYKISS; HORMONE; FISH;
Keywords:
cortisol; trout; Lepeophtheirus salmonis (Kroyer); capture; quadratic model;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Tully, O Univ Dublin Trinity Coll, Dept Zool, Dublin 2, Ireland Univ Dublin Trinity Coll Dublin Ireland 2 ol, Dublin 2, Ireland
Citazione:
W.R. Poole et al., "Modelling the effects of capture and sea lice [Lepeophtheirus salmonis (Kroyer)] infestation on the cortisol stress response in trout", AQUAC RES, 31(11), 2000, pp. 835-841

Abstract

Measuring baseline cortisol in wild salmonids is problematic because of the stress induced by most capture methods. The cortisol response to different periods of confinement stress was modelled in a laboratory population of rainbow trout [Oncorhynchus mykiss (Walbaum)]. A quadratic model was used to predict baseline (precapture) cortisol levels in these fish. A similar quadratic response pattern of cortisol was observed in wild sea trout (Salmo trutta L.). These were captured in timed sequences on four dates by seine netting in Clew Bay, west coast of Ireland. The estimated precapture cortisol for these fish indicated higher levels soon after migration to sea and a positive correlation with the level of infestation by Lepeophtheirus salmonis (Kroyer). Curvilinearity of the quadratic model was correlated with levels of lice infestation, indicating an enhanced cortisol response to confinement stress during capture when parasitic abundance was high. Estimated precapture cortisol for individual sea trout was positively correlated with numbers of lice although the linear regression had low predictive power. The method provides, for the first time, a means to estimate baseline cortisol levels in wild salmonids, and addresses one of the most difficult problems in working with wild fish.

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Documento generato il 04/12/20 alle ore 22:47:45