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Effect of feeding rate on nutrient digestibility in Atlantic salmon, Salmo salar L

journal contribution
posted on 2023-05-16, 22:15 authored by Sajjadi, M, Christopher CarterChristopher Carter
Abstract A digestibility trial was conducted to examine the effect of ration on dry matter, gross energy, crude protein and phosphorus digestibility in Atlantic salmon. Duplicate groups of fish were fed 0.25, 0.5, 0.75, 1.0, 1.25 and 1.9% BW day-1. The faeces were collected using Guelph-type collectors for five successive days. Dry matter, protein and phosphorus digestibilities were all significantly (P < 0.05) affected by ration. Dry matter digestibility was significantly lower in fish fed 0.25% BW day-1 in comparison with 0.5, 0.75 and 1% BW day-1. Protein digestibility was significantly lower for 0.25% BW day-1 ration in comparison with 1.25% BW day-1. Phosphorus digestibility was significantly lower for 0.25% BW day-1 ration in comparison with all other treatments except 1% BW day-1. There were no significant differences for energy digestibility between fish fed different rations. The main effect was reduced digestibility at the lowest ration with no obvious relationship between ration and digestibility above this. This was explained by a relatively higher loss of endogenous faecal nitrogen and phosphorus at sub-maintenance ration.

History

Publication title

Iranian Journal of Fisheries Sciences

Volume

7

Pagination

241-256

ISSN

1562-2916

Department/School

Institute for Marine and Antarctic Studies

Publisher

University of Hormozgan

Place of publication

Iran

Repository Status

  • Restricted

Socio-economic Objectives

Fisheries - aquaculture not elsewhere classified

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