Apparent digestibility coefficients of European grain legumes in rainbow trout (Oncorhynchus mykiss) and Nile tilapia (Oreochromis niloticus) |
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| Authors: | S.C.Q. Magalhães A.R.J. Cabrita P. Valentão P.B. Andrade P. Rema M.R.G. Maia L.M.P. Valente A.J.M. Fonseca |
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| Affiliation: | 1. REQUIMTE, LAQV, ICBAS, Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Porto, Portugal;2. REQUIMTE, LAQV, Laboratório de Farmacognosia, Departamento de Química, Faculdade de Farmácia, Universidade do Porto, Porto, Portugal;3. Universidade de Trás‐os‐Montes e Alto Douro (UTAD), Vila Real, Portugal;4. CECAV‐Universidade de Trás‐os‐Montes e Alto Douro (UTAD), Vila Real, Portugal;5. REQUIMTE, LAQV, DGAOT, Faculdade de Ciências, Universidade do Porto, Porto, Portugal;6. ICBAS, Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Porto, Portugal;7. CIIMAR‐CIMAR L.A., Centro Interdisciplinar de Investiga??o Marinha e Ambiental, Universidade do Porto, Porto, Portugal |
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| Abstract: | Two trials were carried out to evaluate the apparent digestibility coefficients (ADCs) of dry matter (DM), crude protein (CP), lipids, starch and gross energy (GE) of six European varieties of grain legumes, namely chickpea‐type Kabuli (CHK), chickpea‐type Desi (CHD), field pea (FP), faba bean (FB), white lupin (WL) and chickling vetch (CV), in rainbow trout and Nile tilapia juveniles. The ADCs were measured using a reference diet and six experimental diets (700 g/kg of the reference diet and 300 g/kg of each raw grain legume) containing 10 g/kg chromic oxide as inert marker. Additionally, grain legumes were analysed for the organic acids profile. In rainbow trout, FP presented the highest ADCs of DM, CP and GE, whereas chickpeas and FB had the lowest DM, GE and starch ADC values. In Nile tilapia, the lowest values of nutrients (except starch) and energy ADCs were found for FP and CV. Nutrients and energy of chickpeas, WL and FB were better digested by tilapia, whereas FP was better digested by trout. Overall results reveal raw grain legumes as promising feed sources for both fish species. |
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| Keywords: | digestibility grain legumes Nile tilapia organic acids rainbow trout raw seeds |
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