English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/187975
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

Comparative study of age estimation in wild and cultured Octopus vulgaris paralarvae: effect of temperature and diet

AuthorsPerales-Raya, C.; Nande, M.; Roura, Álvaro ; Bartolomé, A. ; Gestal, C. ; Otero, J. J.; García-Fernández, Pablo; Almansa, E.
KeywordsOctopus vulgaris
Cephalopod
Paralarvae
Early life
Ageing
Beaks
Microstructure
Prey
Growth
Issue Date2018
PublisherInter Research
CitationMarine Ecology Progress Series 598: 247-259 (2018)
AbstractThe common octopus Octopus vulgaris is a highly valuable species worldwide, but to understand its population dynamics and requirements under culture conditions, it is crucial to improve our knowledge about its planktonic stages. Previous studies validating daily beak growth increments in these stages allowed age estimation and comparison of wild and cultured paralarvae. We aimed to improve age estimations in captivity, addressing the effect of temperature and diet, to obtain an accurate estimation of age in wild specimens collected from the coast to the open ocean off NW Spain and Morocco. We analysed the beak growth increments of reared paralarvae at 14 and 21°C with 2 different crustacean prey taxa (Artemia and spider crab Maja brachydactyla zoeae) over 30 d. Daily increment deposition at 21°C was confirmed, whereas <1 increment d−1 was recorded at 14°C. The width of the reading area grew accordingly with age; therefore, this beak region may be suitable for age estimation. A general linear model (GLM) analysis showed that temperature and the interaction of age × temperature significantly influenced increment deposition, whereas diet did not. The number of growth rings recorded in wild paralarvae beaks ranged from 0−8 on the coast, 7−11 on the continental shelf and 2−28 in the open ocean. Corrected age estimates of wild paralarvae were obtained with the GLM using the mean temperatures recorded in the wild, supporting the hypothesis that O. vulgaris leave the coastal area and develop in the open ocean transported by upwelling filaments.
Description13 pages, 3 tables, 8 figures
Publisher version (URL)https://doi.org/10.3354/meps12218
URIhttp://hdl.handle.net/10261/187975
DOI10.3354/meps12218
ISSN0171-8630
E-ISSN1616-1599
Appears in Collections:(IIM) Artículos
Files in This Item:
File Description SizeFormat 
Comparative_study_age_2018.pdf896,34 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.