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Titolo:
Gastric evacuation in horse mackerel. I. The effects of meal size, temperature and predator weight
Autore:
Temming, A; Herrmann, JP;
Indirizzi:
Univ Hamburg, Inst Hydrobiol & Fisheries Sci, D-22767 Hamburg, Germany Univ Hamburg Hamburg Germany D-22767 eries Sci, D-22767 Hamburg, Germany
Titolo Testata:
JOURNAL OF FISH BIOLOGY
fascicolo: 5, volume: 58, anno: 2001,
pagine: 1230 - 1245
SICI:
0022-1112(200105)58:5<1230:GEIHMI>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
GADUS-MORHUA L; PERCH PERCA-FLUVIATILIS; FOOD-CONSUMPTION; STOMACH CONTENTS; ATLANTIC COD; FISH; SEA; MODEL; RATES; YOUNG;
Keywords:
gastric evacuation; consumption; maximum ration; horse mackerel; model; temperature effect; appetite;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
40
Recensione:
Indirizzi per estratti:
Indirizzo: Temming, A Univ Hamburg, Inst Hydrobiol & Fisheries Sci, Olbersweg 24, D-22767 Hamburg, Germany Univ Hamburg Olbersweg 24 Hamburg Germany D-22767 urg, Germany
Citazione:
A. Temming e J.P. Herrmann, "Gastric evacuation in horse mackerel. I. The effects of meal size, temperature and predator weight", J FISH BIOL, 58(5), 2001, pp. 1230-1245

Abstract

Gastric evacuation experiments were performed on horse mackerel Trachurus trachurus. A nearly full matrix experimental design with respect to the variables predator weight (< 10-400 g) meal size (up to 7.8% body weight) and temperature ( 10-20 degrees C) was covered with 0-group smelt Osmerus eperlanus as prey. A general evacuation model without meal size as a variable was fitted to the data on wet weights as well as on dry weights by means of non-linear regression technique Two methods of data transformation, relativedata and square root transformation, were applied to improve variance homogeneity. The most reliable model fit was achieved on dry weight data applying the square root transformation technique:S-t=[S-0(0.31) - 0.109t W-0.248 e(0.0321)](3.23)where S-t=stomach content (g wet weight) at time t after ingestion. S-0=the initial meal size, W=predator (g wet weight). and T=temperature. The estimated coefficient of the exponential temperature function, delta =0.032, corresponds to a Q(10) value of 1.4 which is outstandingly low in comparison with results on other species. However additional experiments to determine maximum daily food rations indicated that appetite in contrast to gastric evacuation is strongly temperature dependent. (C) 2001 The Fisheries Societyof the British Isles.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/09/20 alle ore 21:58:26