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Titolo:
MANAGEMENT OF SIZE VARIATION IN JUVENILE GILTHEAD SEA BREAM (SPARUS-AURATA) .1. PARTICLE-SIZE AND FREQUENCY OF FEEDING DRY AND LIVE FOOD
Autore:
GOLDAN O; POPPER D; KARPLUS I;
Indirizzi:
AGR RES ORG,DEPT AQUACULTURE,POB 6 IL-50250 BET DAGAN ISRAEL AGR RES ORG,DEPT AQUACULTURE IL-50250 BET DAGAN ISRAEL NATL CTR MARICULTURE ELAT ISRAEL
Titolo Testata:
Aquaculture
fascicolo: 1-4, volume: 152, anno: 1997,
pagine: 181 - 190
SICI:
0044-8486(1997)152:1-4<181:MOSVIJ>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
ANGUILLA-ANGUILLA L; ATLANTIC SALMON; EUROPEAN EEL; GROWTH; BEHAVIOR; AQUACULTURE; POPULATION; RATIONS; DIET;
Keywords:
SPARUS AURATA; GROWTH DEPENSATION; PARTICLE SIZE; FEEDING FREQUENCY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
28
Recensione:
Indirizzi per estratti:
Citazione:
O. Goldan et al., "MANAGEMENT OF SIZE VARIATION IN JUVENILE GILTHEAD SEA BREAM (SPARUS-AURATA) .1. PARTICLE-SIZE AND FREQUENCY OF FEEDING DRY AND LIVE FOOD", Aquaculture, 152(1-4), 1997, pp. 181-190

Abstract

The effects of particle size and frequency of feeding on survival, growth and growth depensation of juvenile gilthead sea bream were investigated in three separate experiments, In the first experiment the effects of dry food particle size and frequency of feeding were investigated with all treatments being equally supplemented with Artemia, Growthdepensation, measured as the change in the coefficient of variation of mean weight (Delta CV), was affected by particle size but not by frequency of feeding, Frequency of feeding did, however, have a significant effect on growth rate. In the second experiment the effects of feeding brine shrimp, Artemia, as a supplemental feed were tested. Feedingcontinuously with brine shrimp resulted in a lower Delta CV than periodic feeding (Delta CV values of 15.6 vs. 21.8%, respectively). In thethird experiment the effect of feeding Artemia as the sole source of food was tested. Continuous feeding resulted in a seven-fold higher Delta CV as compared to periodic feeding (Delta CV values of 24.6 vs. 3.6%, respectively). Competitive interactions between individuals of different size, and the differential attraction of fish to dry pellets and live food, are discussed as possible behavioral mechanisms underlying the results. Careful management of food administration (i.e. feedingfrequency and particle size) could reduce the need for labor-intensive and stressful size-grading during nursing. (C) 1997 Elsevier ScienceB.V.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/11/20 alle ore 13:25:56