Selection of marine species and meals for cephalopod feeding based on their essential mineral composition |
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| Authors: | J Cerezo Valverde A Tomás Vidal S Martínez‐Llorens MC Pascual JI Gairín J Estefanell D Garrido JF Carrasco F Aguado‐Giménez B García García |
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| Institution: | 1. Research Group of Aquaculture and Biodiversity, Institute of Animal Science and Technology, Polytechnic University of Valencia, Valencia, Spain;2. Tecnología de Productos Pesqueros, Instituto de Investigaciones y Análisis Alimentarias (IIAA), Universidad de Santiago de Compostela, Santiago de Compostela, A Coru?a, Spain;3. Institut de Recerca i Tecnología Agroalimentaries, S. Carles de la Rápita, Tarragona, Spain;4. Grupo de Investigación en Acuicultura, Instituto Canario de Ciencias Marinas & Instituto Universitario de Sanidad Animal y Seguridad Alimentaria, Telde, Las Palmas, Canary Islands, Spain;5. IFAPA Centro Agua del Pino Ctra, Cartaya, Huelva, Spain;6. Centro de Experimentación Pesquera, Consejería de Medio Rural y Pesca, Castropol, Asturias, Spain;7. IMIDA‐Acuicultura, Consejería de Agricultura y Agua de la Región de Murcia, Puerto de San Pedro del Pinatar, San Pedro del Pinatar, Murcia, Spain |
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| Abstract: | A quantitative analysis of the essential mineral content (mg kg?1 dry weight) was carried out in 31 samples, including molluscs, crustaceans, fish and meals in an attempt to identify those most suitable for formulating cephalopod diets. The mineral ratios (MR: content in the test sample/content in whole Octopus vulgaris) were used as index of nutritional quality. Both crustaceans and oysters presented an optimal profile that covered the macro‐ and microelements composition of O. vulgaris. These samples differed from the rest by their higher Ca, Mg, B, Cu and Zn contents based on a principal component analysis. Fish were deficient in macroelements, such as Na (MR: 70–420 g kg?1) and Mg (MR: 220–690 g kg?1), but would be good source of K, Ca and P. Most fish were also deficient in Fe, Zn and Cu, although the copper content would be the most affected (MR: 3–130 g kg?1). Fish and krill meals showed a high content of Ca and P, although both would be deficient in Na (MR: 440–470 g kg?1) and Cu (130–540 g kg?1), along with K, Fe and Zn in krill and Mg and B in fish. Among the plant meals, sunflower and soybean were the most appropriate, presenting higher total content of minerals and MRs above 1000 g kg?1 for all minerals, except Na, Cu and Zn. |
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| Keywords: | cephalopods feed formulation feed ingredients minerals nutrition octopus |
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