Pea protein concentrate in diets for sharpsnout sea bream (Diplodus puntazzo): effects on growth and health status.
Four diets for sharpsnout sea bream juveniles (14 g body weight) with four levels of air-processed pea protein concentrate (PPC) (0, 160, 320 and 487 g/kg diet) were tested in triplicate. The experimental diets were isonitrogenous (43% crude protein) and isolipidic (19% ether extract) and the fish were fed to satiation twice a day. After 125 d, fish growth was diminished by the inclusion of PPC. Feed conversion did not show significant differences in any treatment. Neither the body analyses nor the protein and individual essential amino acid retention efficiencies were affected by the inclusion of PPC in the diet. However, histological gut examinations revealed noticeable differences. Fish fed the diet with the highest inclusion level of PPC presented the longest villous length and the most goblet cells, and the width of the lamina propria increased in the anterior intestine. Although no negative changes in nutritive parameters were detected, these alterations might affect nutrient transport, with negative consequences for fish growth. It was concluded that the PPC in the amounts tested here is an inappropriate substitute for fishmeal in diets for sharpsnout sea bream juveniles.
a Research Group of Aquaculture and Biodiversity, Institute of Animal Science and Technology , Universitat Politècnica de València , Valencia , Spain.|b Faculty of Agronomy and Environmental Science , Universidad Técnica del Norte , Ibarra , Ecuador.
Silvia
S
Nogales-Mérida
a Research Group of Aquaculture and Biodiversity, Institute of Animal Science and Technology , Universitat Politècnica de València , Valencia , Spain.
Ana
A
Tomás-Vidal
a Research Group of Aquaculture and Biodiversity, Institute of Animal Science and Technology , Universitat Politècnica de València , Valencia , Spain.
Andrés
A
Moñino-López
a Research Group of Aquaculture and Biodiversity, Institute of Animal Science and Technology , Universitat Politècnica de València , Valencia , Spain.
Miguel
M
Jover-Cerdá
a Research Group of Aquaculture and Biodiversity, Institute of Animal Science and Technology , Universitat Politècnica de València , Valencia , Spain.
Silvia
S
Martínez-Llorens
D000821:Animal Feed / Q000032:analysis; D000824:Animal Nutritional Physiological Phenomena / Q000187:drug effects; D000818:Animals; D017756:Aquaculture; D004032:Diet / Q000662:veterinary; D004305:Dose-Response Relationship, Drug; D007887:Fabaceae / Q000737:chemistry*; D041981:Gastrointestinal Tract / Q000033:anatomy & histology / Q000187:drug effects; D010473:Perciformes / Q000254:growth & development / Q000502:physiology*; D014674:Plant Proteins, Dietary / Q000008:administration & dosage / Q000378:metabolism*
D014674:Plant Proteins, Dietary
Diplodus puntazzo; feed formulation; fish meal; peas; performance; protein concentrates; replacement