Skip to Main content Skip to Navigation
Journal articles

Comparison of endogenous loss and maintenance need for minerals in rainbow trout (Oncorhynchus mykiss) fed fishmeal or plant ingredient-based diets

Abstract : Mineral needs as affected by changes in dietary protein and oil sources were studied in rainbow trout. Duplicate groups (n = 30 fish per replicate) of rainbow trout (initial BW: 37 g) were fed either a fish meal/fish oil-based (M) or a complete plant ingredient (V)-based diet at four graded ration (R) levels [apparent satiation (AS), R75, R50 and R25 % of AS]; one treatment group was maintained under starvation. The feeding trial lasted 12 weeks at a water temperature of 17 C. Dietary intake, apparent digestibility and initial and final whole-body composition data were used to calculate mineral gain which was regressed against digestible mineral intake (both expressed as mg or lg kg-0.8 day-1). Starvation loss (SL), endogenous loss of fed fish (ELF, y-intercept at x = 0) and point of intake for zero balance (PZB, x-intercept at y = 0) were used as estimates of maintenance requirements. SL provided the lowest estimate, ELF provided the net requirement of a mineral for maintenance and PZB provided the digestible dietary intake required to meet maintenance (SL\ELF\PZB). Dietary ingredient composition did not significantly affect the digestible mineral supply required for maintenance (PZB) for any of the minerals (P,Mg, K,Cu and Zn) studied.However, ELF of micro-minerals such as Cu and Zn were significantly affected. The ELF of Cu was significantly lower and that of Zn was significantly higher inV group compared with M-fed fish. Further studies on the effects of such changes in dietary formulations on micromineral metabolism are warranted.
Document type :
Journal articles
Complete list of metadata

https://hal.archives-ouvertes.fr/hal-01548682
Contributor : Archive Ouverte Prodinra <>
Submitted on : Tuesday, June 27, 2017 - 8:38:30 PM
Last modification on : Thursday, August 5, 2021 - 3:52:45 AM

Identifiers

Collections

Citation

Philip Antony Jesu Prabhu, Sadasivam J. Kaushik, Catherine Mariojouls, Anne Surget, Stéphanie Fontagné-Dicharry, et al.. Comparison of endogenous loss and maintenance need for minerals in rainbow trout (Oncorhynchus mykiss) fed fishmeal or plant ingredient-based diets. Fish Physiology and Biochemistry, Springer Verlag, 2015, 41 (1), pp.243-253. ⟨10.1007/s10695-014-0020-y⟩. ⟨hal-01548682⟩

Share

Metrics

Record views

380