Skip to main content

Behavioural response of Mullus surmuletus to habitat modification by the invasive macroalga Caulerpa taxifolia

Buy Article:

$51.00 plus tax (Refund Policy)


Densities of red mullet Mullus surmuletus have declined since 1996 at Cap Martin, Alpes‐Maritimes, France, following colonization by Caulerpa taxifolia. Foraging M. surmuletus were rarely observed over C. taxifolia or the seagrass Posidonia oceanica, but were observed over bare sand and endemic macroalgae. Within colonized sites (where the mean cover of C. taxifolia was 30–100%), fish were concentrated on areas with low cover of C. taxifolia(<21%). A difference in the frequency of observations of foraging groups (17%) was observed between sites with and without C. taxifolia. The observed patterns were probably due to a physical barrier to foraging that is presented by meadows of C. taxifolia. Changes to habitat structure that occur when the substratum is colonized by C. taxifolia influence the accessibility to benthic food resources, and consequently the foraging activities of fish that feed on benthic invertebrates. The decline in density of M. surmuletus at Cap Martin could be the result of fish emigration from colonized sites (unfavourable to the species) to uncolonized sites.

Keywords: Caulerpa taxifolia; Mullus surmuletus; benthic communities; foraging behaviour; structural complexity

Document Type: Regular Paper


Affiliations: E.A. 3156, Gestion de la biodiversit√© Laboratoire Environnement Marin Littoral, Universit√© de Nice-Sophia Antipolis Facult√© des Sciences, Parc Valrose, 06 108 Nice Cedex 2, France

Publication date: 2004-01-01

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more