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Titolo:
EFFECTS OF TEMPERATURE ON GROWTH AND METABOLISM IN JUVENILE TURBOT
Autore:
BUREL C; PERSONLERUYET J; GAUMET F; LEROUX A; SEVERE A; BOEUF G;
Indirizzi:
IFREMER,CTR BREST,BP 70 F-29280 PLOUZANE FRANCE IFREMER,CTR BREST F-29280 PLOUZANE FRANCE
Titolo Testata:
Journal of Fish Biology
fascicolo: 4, volume: 49, anno: 1996,
pagine: 678 - 692
SICI:
0022-1112(1996)49:4<678:EOTOGA>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
SCOPHTHALMUS-MAXIMUS L; SALMON SALMO-SALAR; ATLANTIC SALMON; BODY-WEIGHT; SALINITY; PHOTOPERIODS; SIZE;
Keywords:
TURBOT; TEMPERATURE; GROWTH; FOOD UTILIZATION; OXYGEN CONSUMPTION; NITROGEN EXCRETION; ION-REGULATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
29
Recensione:
Indirizzi per estratti:
Citazione:
C. Burel et al., "EFFECTS OF TEMPERATURE ON GROWTH AND METABOLISM IN JUVENILE TURBOT", Journal of Fish Biology, 49(4), 1996, pp. 678-692

Abstract

The effects of constant temperatures on growth, food efficiency, and physiological status were studied in four different batches of juvenile turbot. The growth responses were studied in three experiments lasting 70-85 days under 8-20 degrees C thermal conditions. There was a positive correlation between growth and temperature from 8 to 17 degrees C and a plateau was observed from 17 to 20 degrees C. In fish fed to satiety, specific growth rate was positively correlated to the food intake, which was double at 20 degrees C, compared with 8 degrees C. Minor changes were observed in food efficiency. Body fat deposition decreased as temperature increased (25% lower at 20 degrees C, compared with8 degrees C). Apparent food conversion, PER (protein efficiency ratio) and PUC (protein utilization coefficient) ranges were 0.8-0.9, 2.1-2.3 and 33-38% respectively. In 70-300 g fish, routine MO(2) increased (2.5-6.5 mu mol O-2 h(-1) g bw(-1)) with temperature up to 20 degrees C, while larger turbot (500-600 g) appeared relatively thermo-independent, with a lower oxygen consumption (1.5 mu mol h(-1) g(-1)). The average daily total ammonia nitrogen (TAN) and urea-N excretion per fish biomass was positively related to temperature. TAN was 30% lower at 8 degrees C, compared with 20 degrees C. Ingested nitrogen was mainly excreted under the final form of TAN, urea-N representing 26% of the total amount. A post-prandial peak in TAN and a delayed peak in urea-N nitrogen were observed. The hydromineral status [osmolarity, sodium, chloride and potassium blood plasma, gill (Na+-K+)-ATPase activity] of turbot was not affected by progressive changes in temperature during theacclimation period. Juvenile turbots show remarkable homeostatic capacities and so they have a relatively thermo-independent physiology within the range of temperature studied. (C) 1996 The Fisheries Society of the British Isles

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/11/20 alle ore 16:56:18