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Growth and feed efficiency of O ctopus vulgaris fed on dry pelleted
Author(s) -
Querol Pablo,
Gairin Ignasi,
Guerao G.,
Jover Miguel,
Tomás Ana
Publication year - 2015
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/are.12269
Subject(s) - biology , fish meal , zoology , feed conversion ratio , yolk , octopus (software) , meal , food science , composition (language) , body weight , fish <actinopterygii> , fishery , endocrinology , linguistics , philosophy , physics , quantum mechanics
The purpose of this study was to evaluate the effect of two dry extruded diets on growth and nutritional composition of digestive gland ( DG ) and muscle of O ctopus vulgaris . Both artificial diets ( FMK and 3 FMK ) were composed of gelatin, maltodextrin, yolk, fish and krill meal. The 3 FMK diet contained more fishmeal (3×) than the FMK diet. These diets were compared with a control frozen diet consisting of golden grey mullet ( L iza aurata ) and crab ( L iocarcinus depurator ). The 3 FMK diet promoted higher intakes and feed efficiency than FMK diet, resulting in larger growths (296 respect to 158 g in 42 days; 0.81% vs. 0.78% body weight/day). There was significantly lower moisture, protein and ash content in digestive glands of animals fed pellets ( P < 0.05). No significant differences were observed on nutritional composition of muscle among the three groups. Even though the results were still below those of the control group (increase of 1258 g), the good performance in terms of acceptance and growth showed that this extruded diet can be the starting point to develop a commercial feed for this species.