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- Title
High feeding and growth rates in common octopus ( Octopus vulgaris) fed formulated feeds with an improved amino acid profile and mixture of binders.
- Authors
Cerezo Valverde, Jesús; García, Benjamín García
- Abstract
Four semi-moist formulated feeds were supplied to Octopus vulgaris subadults (664 ± 70 g; 18.4 ± 0.7°C) in two different experiments. In the experiment #1, two diets were prepared with a new mixture of binders (gelatine 150 g kg−1, starch 100 g kg−1 and gum 50 g kg−1). The GEL15-Squid and GEL15-Hake feeds included 100 g kg−1 freeze-dried squid ( Todarodes sagittatus) or hake ( Merluccius sp.) respectively. Both feeds showed low water disintegration rates at 24 h (13.6-15.0% dry weight). The specific feeding rate was higher in animals fed GEL15-Hake (2.7% BW day−1), but the growth and feed efficiency were significantly better in animals fed GEL15-Squid (1.4% BW day−1 and 61.2% respectively; P < 0.05). The proximate composition of the digestive gland, carcass and whole animals was similar. In the experiment #2, the GEL15-Squid amino acid profile was improved by replacing 50 g kg−1 gelatine by 50 g kg−1 freeze-dried squid ( GEL10-Squid) or freeze-dried fish ( GEL10-Fish). These feeds showed higher water disintegration rates (31.7-36.3% dry weight). The feeding rates (2.2-2.3% BW day−1), growth (1.5% BW day−1) and feed efficiency were similar for both diets. Total lipids were higher in the digestive gland and whole animals fed GEL10-Fish diet ( P < 0.05). Future effort could be directed towards alternative binders that allow improve amino acid balance with a minimum gelatine content or even supplementation trials including essential amino acids.
- Subjects
COMMON octopus; NUTRITIVE value of feeds; GELATIN; PHYSIOLOGICAL effects of amino acids; DIET; PHYSIOLOGY
- Publication
Aquaculture Research, 2017, Vol 48, Issue 7, p3308
- ISSN
1355-557X
- Publication type
Article
- DOI
10.1111/are.13157