Larval fish swimming behavior alters dispersal patterns from marine protected areas in the North-Western Mediterranean Sea

Robin Faillettaz, Claire B Paris-Limouzy, Jean Olivier Irisson

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Most demersal fishes undergo a dispersal phase as larvae, which strongly influences the connectivity among adult populations and, consequently, their genetic structure and replenishment opportunities. Because this phase is difficult to observe directly, it is frequently simulated through numerical models, most of which consider larvae as passive or only vertically migrating. However, in several locations, including the Mediterranean Sea, many species have been shown to swim fast and orient. Here we use a Lagrangian model to study connectivity patterns among three Mediterranean Marine Protected Areas (MPAs) and compare simulations in which virtual larvae are passive to simulations in which oriented swimming is implemented. The parameterization of behavior is based on observations for two groups of species of the family Sparidae: species with small larvae (i.e., 9-11 mm), displaying a maximum swimming speed of 6 cm s-1 and a pelagic larval duration of 13-19 days (e.g., Diplodus annularis L., Oblada melanura L.) and species with large larvae (i.e., 14-16 mm), displaying a maximum swimming speed of 10 cm s-1 and a PLD of 28-38 days (e.g., Spondyliosoma cantharus L.). Including larval behavior in the model (i) increased the overall proportion of successful settlers, (ii) enhanced self-recruitment within the MPAs, but also (iii) increased the intensity, and (iv) widened the export of eggs and larvae (recruitment subsidy) from the MPAs; overall, it significantly changed connectivity patterns. These results highlight the need to gather the observational data that are required to correctly parameterize connectivity models.

Original languageEnglish (US)
Article number97
JournalFrontiers in Marine Science
Volume5
Issue numberMAR
DOIs
StatePublished - Mar 26 2018

Fingerprint

dispersal behavior
swimming behavior
Mediterranean Sea
Fish
protected area
conservation areas
larva
connectivity
larvae
fish
Pulsed laser deposition
Parameterization
Numerical models
Diplodus annularis
Sparidae
demersal fish
subsidies
genetic structure
simulation
Swimming

Keywords

  • Behavior
  • Connectivity
  • Dispersal
  • Fish larvae
  • Marine protected areas
  • Mediterranean sea
  • Modeling
  • Swimming

ASJC Scopus subject areas

  • Oceanography
  • Global and Planetary Change
  • Aquatic Science
  • Water Science and Technology
  • Environmental Science (miscellaneous)
  • Ocean Engineering

Cite this

Larval fish swimming behavior alters dispersal patterns from marine protected areas in the North-Western Mediterranean Sea. / Faillettaz, Robin; Paris-Limouzy, Claire B; Irisson, Jean Olivier.

In: Frontiers in Marine Science, Vol. 5, No. MAR, 97, 26.03.2018.

Research output: Contribution to journalArticle

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