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Titolo:
Effects of dietary water content on meal size, daily food intake, digestion and growth in turbot, Scophthalmus maximus (L.)
Autore:
Grove, D; Genna, R; Paralika, V; Boraston, J; Hornyold, MG; Siemens, R;
Indirizzi:
Univ Wales, Sch Ocean Sci, Menai Bridge LL59 5EY, Gwynedd, Wales Univ Wales Menai Bridge Gwynedd Wales LL59 5EY e LL59 5EY, Gwynedd, Wales
Titolo Testata:
AQUACULTURE RESEARCH
fascicolo: 6, volume: 32, anno: 2001,
pagine: 433 - 442
SICI:
1355-557X(200106)32:6<433:EODWCO>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
JUVENILE TURBOT; RAINBOW-TROUT; BODY-WEIGHT; TEMPERATURE; CONVERSION; DRY;
Keywords:
Scophthalmus maximus (L.); turbot; appetite; feed intake; digestion; X-radiography; growth;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Grove, D Univ Wales, Sch Ocean Sci, Menai Bridge LL59 5EY, Gwynedd, Wales Univ Wales Menai Bridge Gwynedd Wales LL59 5EY Y, Gwynedd, Wales
Citazione:
D. Grove et al., "Effects of dietary water content on meal size, daily food intake, digestion and growth in turbot, Scophthalmus maximus (L.)", AQUAC RES, 32(6), 2001, pp. 433-442

Abstract

When fed once daily with wet squid, turbot (30-50 g) accustomed to dry pellets require many days to increase intake to meet their feed requirement (approximate to 10 mg dry matter g(-1) bw meal(-1)). Adaptation takes 1-2 days if several daily feedings are given. With dried squid, they ingest about 20% of the wet squid bulk because the stomach contents expand when moisturised. In contrast, turbot eat enough wet squid to fill most of the availablestomach volume (approximate to 7.6 mL 100 g(-1) bw). When presented in gelatine capsules, food water content is masked and does not affect the volumeingested. Moistening the contents shortens the delay before gastric emptying starts to one-third (0.6 h) compared with dry food (1.9 h). Daily dry-matter intake increased when dry contents were moistened but only if two or more meals were offered per day. Turbot adapt their digestion to supply water for dry diets but this may add extra metabolic costs. When offered 20 mg dry matter g bw(-1) day(-1), divided into four equal meals, turbot grew faster and more efficiently with moist than with dry squid. Protein, energy and dry-matter digestibilities were also enhanced. The increased daily protein absorption did not increase ammonia release, indicating that the extra protein was used for somatic growth.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/10/20 alle ore 02:19:00