Skip Navigation


Journal Molluscan Studies Advance Access originally published online on April 26, 2007
Journal of Molluscan Studies 2007 73(2):117-121; doi:10.1093/mollus/eym003
This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow All Versions of this Article:
73/2/117    most recent
eym003v1
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in ISI Web of Science
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrow Search for citing articles in:
ISI Web of Science (1)
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Márquez, L.
Right arrow Articles by Navas, J. I.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Márquez, L.
Right arrow Articles by Navas, J. I.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© The Author 2007. Published by Oxford University Press on behalf of The Malacological Society of London, all rights reserved

Effects of visual conditions and prey density on feeding kinetics of paralarvae of Octopus vulgaris from a laboratory spawning

Lorenzo Márquez1,2,, Daniel Quintana1, Eduardo Almansa1 and José Ignacio Navas1

1 Centro de Investigación y Formación Acuícola y Pesquera ‘Agua del Pino’ (IFAPA-Junta de Andalucía) Apdo.: 104. C.P.: 21071 -Huelva, Spain; and 2 Empresa Pública para el Desarrollo Agrario y Pesquero, S. A. C/ Bergantín, 39. C.P.: 41012 – Sevilla, Spain

Correspondence: L. Márquez; e-mail: lorenzo.marquez.ext{at}juntadeandalucia.es


  Abstract

Consumption rate and feeding success of newly hatched paralarvae of the cephalopod Octopus vulgaris preying on Artemia larvae were investigated in relation to visual conditions and prey density. Each paralarva was tested individually using a small-scale experimental setup; consumption over one day was measured at 20°C. A factorial experiment was designed to investigate the effects on the consumption rate of two predictor variables: illumination/background (three levels: 7.5 Wm–2 white light + white background, 7.5 Wm–2 white light + blue background, darkness) and prey density (four levels: 2.35, 4.70, 9.40 and 14.10 Artemia metanauplii ml–1). Consumption rate varied significantly between different conditions of illumination and prey density. Light enhanced consumption rate, but different backgrounds yielded similar rates. The maximal consumption rate under illumination was close to 16 Artemia paralarva–1 day–1, and it was around 5 Artemia paralarva–1 day–1 for assays in darkness. The predatory efficiency, measured as the proportion of prey consumed, was significantly affected by prey density, pointing to a type III functional response. The number of nonfeeding paralarvae was significantly higher in darkness and at low prey density.

(Received 14 February 2006; accepted 23 December 2006)


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?




Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.