Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Nocturnal/diurnal demand-feeding pattern of yellowtail Seriola quinqueradiata under different keeping conditions
Autore:
Kohbara, J; Hidaka, I; Kuriyama, I; Yamashita, M; Ichikawa, M; Furukawa, K; Aida, K; Sanchez-Vazquez, FJ; Tabata, M;
Indirizzi:
Mie Univ, Fac Bioresources, Tsu, Mie 5148507, Japan Mie Univ Tsu Mie Japan 5148507 Fac Bioresources, Tsu, Mie 5148507, Japan Fisheries Res Inst Mie, Owase Branch Stn, Owase, Mie 5193602, Japan Fisheries Res Inst Mie Owase Mie Japan 5193602 Owase, Mie 5193602, Japan Univ Tokyo, Grad Sch Agr & Life Sci, Dept Aquat Biosci, Bunkyo Ku, Tokyo 1138657, Japan Univ Tokyo Tokyo Japan 1138657 t Biosci, Bunkyo Ku, Tokyo 1138657, Japan Univ Murcia, Fac Biol, Dept Physiol & Pharmacol, E-30100 Murcia, Spain Univ Murcia Murcia Spain E-30100 siol & Pharmacol, E-30100 Murcia, Spain Teikyo Univ Sci & Technol, Dept Biosci, Yamanashi 4090100, Japan Teikyo Univ Sci & Technol Yamanashi Japan 4090100 manashi 4090100, Japan
Titolo Testata:
FISHERIES SCIENCE
fascicolo: 5, volume: 66, anno: 2000,
pagine: 955 - 962
SICI:
0919-9268(200010)66:5<955:NDPOYS>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
TROUT ONCORHYNCHUS-MYKISS; DICENTRARCHUS-LABRAX L; EUROPEAN SEA BASS; RAINBOW-TROUT; SELF-FEEDERS; GROWTH; BEHAVIOR; RHYTHMS; SYSTEM; CONVERSION;
Keywords:
demand-feeding; diel feeding pattern; diurnal; feeding behavior; nocturnal; Seriola quinqueradiata;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Kohbara, J Mie Univ, Fac Bioresources, Tsu, Mie 5148507, Japan Mie Univ Tsu Mie Japan 5148507 ources, Tsu, Mie 5148507, Japan
Citazione:
J. Kohbara et al., "Nocturnal/diurnal demand-feeding pattern of yellowtail Seriola quinqueradiata under different keeping conditions", FISHERIES S, 66(5), 2000, pp. 955-962

Abstract

Demand-feeding behavior of juvenile yellowtails was examined under two different light conditions: in an experimental room and in the outdoors. In the indoor experiment, five groups of 20 juvenile yellowtails (mean bodyweight, 16.0 g) were allocated individually to five 200 L cylindrical tanks set up in the experimental room. A rod-type tactile switch was used for activating the feeding device which delivered 5-10 pellets per actuation. Each tank was illuminated by an overhead fluorescent lamp with a LD 12:12 photoperiod regime. In the outdoor experiment, 69 juvenile yellowtails (mean bodyweight, 79.8 g) were allocated to a 7000 L cylindrical tank. A switch with a string that ends in a rubber, pellet-like knob was used. The feeding device delivered 90-120 pellets by activation of the switch. In both experiments, yellowtail learned demand-feeding within 1-3 days. The number of feeder actuations gradually increased during the experimental period in both experiments, presumably relating both to the rate of learning and to growth of the fish. The yellowtails in the indoor system showed a clear diurnal feeding pattern synchronizing to the given photoperiod, whereas those in the outdoorsystem showed a clear nocturnal feeding pattern also synchronizing to the outdoor natural photoperiod. Thus, the results showed that yellowtail has an ability for demand-feeding both in light and dark phases. These exact opposite results may have been caused by the difference in intensity of the luminance between the inside of the experimental room and the outdoors.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/01/21 alle ore 02:52:34