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An insight on Octopus vulgaris paralarvae lipid requirements under rearing conditions

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untranslatedReis 2014 AQN-Pulpo.pdf (804.5Kb)
Identifiers
URI: http://hdl.handle.net/10508/9810
ISSN: 1353-5773
DOI: 10.1111/anu.12205
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Authors
Reis, D.B. (Diana); Gracía-Herrero, I.; Riera, R.; Felipe, B.C. (Beatriz Concepción); Rodríguez, C.; Sykes, A.V. (Antonio V.); Martín, M.V. (María Virginia); Andrade, J.P. (Jose Pedro); Almansa, E. (Eduardo)
Date
2014
Type
research article
Keywords
Artemia
decapod crustacean zoeae
lipid requirements
Octopus vulgaris
paralarval rearing
Abstract
In this study, two new alternative preys: Grapsus adscensionis zoeae (as sole prey) and Palaemon elegans zoeae (in cofeeding with Artemia sp.), as well as, Artemia sp. juveniles were used as feed for octopus paralarvae, as a way to understand its lipid requirements. Total lipid (TL) content, lipid class (LC) and fatty acid (FA) profiles of preys, octopus hatchlings and 9-day-old paralarvae were analysed. Growth and survival of the paralarvae were also determined. Regardless the prey provided, a notable shift in the lipid profile of paralarvae was registered after 9 days of rearing. The highest index of growth rate (IGR) recorded when decapod crustacean zoeae were supplied might have some relation with levels of 20:4n-6 (ARA) and DHA/EPA ratio observed. In this sense, Grapsus adscensionis zoeae leaded to a higher content of ARA and a lower content of EPA, which may indicate a possible competition between these two FA. For that a balanced EPA/ARA ratio might be significant in this species ...

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