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Title

Fatty acid composition and age estimation of wild Octopus vulgaris paralarvae

AuthorsGarrido, Diego; Navarro, Juan Carlos ; Roura, Álvaro ; Varó, Inmaculada ; González, Ángel F. ; Almansa, E.
KeywordsWild paralarvae
Octopus vulgaris
Fatty acid
Age
Beaks
Issue Date1-Nov-2016
PublisherElsevier
CitationAquaculture 464: 564-569 (2016)
AbstractThe fatty acid (FA) profile of wild Octopus vulgaris paralarvae of estimated age was individually analyzed for the very first time in order to establish a reference for comparison in rearing and nutritional studies. Age of each paralarvae was estimated by analysing daily increments on lateral hood surface of beaks. Wild paralarvae age ranged between 6 and 8 days and their FA composition resembled that from hatchlings produced under culture conditions. However, when compared with the FA composition of up to 20 days old cultured paralarvae described in the bibliography, some striking differences were found. Results showed higher levels of docosahexaenoic acid (22:6n − 3, DHA), lower contents of 18:1n − 9, 18:1n − 7 and 18:2n − 6 and negligible levels of 18:3n − 3 in wild paralarvae, when collated to reared one. These results seem to indicate that preys/diets supplied to cultured paralarvae fail to resemble paralarval natural composition and as a result do not fulfil their FA requirement. The individual applied technique developed in this study will allow to refine the study of wild paralarvae along its development, as well as to compare wild and cultured paralarvae of similar age. Statement of relevance Artemia does not fulfil paralarval fatty acid requirements.
Publisher version (URL)https://doi.org/10.1016/j.aquaculture.2016.07.034
URIhttp://hdl.handle.net/10261/145593
DOI10.1016/j.aquaculture.2016.07.034
Identifiersissn: 0044-8486
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