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Titolo:
Comparison of nutrient losses into the water from rainbow trout culture based on fresh Baltic herring, moist and dry diets
Autore:
Ruohonen, K; Vielma, J; Grove, DJ;
Indirizzi:
Evo70,sheries Res & Aquaculture, Finnish Game & Fisheries Res Inst, Evo 169 Evo Fisheries Res & Aquaculture Evo Finland 16970 ries Res Inst, Evo 169 Laukaaolasheries Res & Aquaculture, Finnish Game & Fisheries Res Inst, Valk Laukaa Fisheries Res & Aquaculture Valkola Finland 41360 Res Inst, Valk Marine Sci Labs, Menai Bridge LL59 5EY, Gwynedd, Wales Marine Sci Labs Menai Bridge Gwynedd Wales LL59 5EY 9 5EY, Gwynedd, Wales
Titolo Testata:
AQUACULTURE INTERNATIONAL
fascicolo: 6, volume: 6, anno: 1998,
pagine: 441 - 450
SICI:
0967-6120(199812)6:6<441:CONLIT>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
SALMO-GAIRDNERI; ONCORHYNCHUS-MYKISS; PHOSPHORUS; AQUACULTURE; POLLUTION; NITROGEN; PLASMA; CASEIN; FARM;
Keywords:
cage culture; dietary lipid; dietary water; feeding frequency moist diets; nitrogen; phosphorus; rainbow trout (Oncorhynchus mykiss);
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Ruohonen, K Evo70,sheries Res & Aquaculture, Finnish Game & Fisheries Res Inst, Evo 169 Evo Fisheries Res & Aquaculture Evo Finland 16970 t, Evo 169
Citazione:
K. Ruohonen et al., "Comparison of nutrient losses into the water from rainbow trout culture based on fresh Baltic herring, moist and dry diets", AQUACUL INT, 6(6), 1998, pp. 441-450

Abstract

The nutrient losses into the water from rainbow trout (Oncorhynchus mykiss) cage culture using locally caught low-fat Baltic herring, herring-based moist diets and fishmeal-based dry diets were estimated. Feeding with herring led to nitrogen and phosphorus losses into the water twice as high as those feeding with dry pellets (78-162 versus 37-39 g N and 15-39 versus 7-18 g P per kg growth). This was supported by direct measurements of ammonia and phosphate excretion. Increasing feeding frequencies resulted in increasednutrient losses irrespective of diet. Increasing dietary lipid level had amore pronounced effect in reducing the expected nutrient losses in dry pellets than herring. The reduction within the herring was approximately 18% on average for nitrogen and 25% for phosphorus losses. Dietary water contentdid not affect the nutrient losses.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/11/20 alle ore 11:01:28