Live fast, die young: Behavioural and physiological impacts of light pollution on a marine fish during larval recruitment

J. J. O'Connor, E. K. Fobert, M. Besson, H. Jacob, D. Lecchini

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Artificial light at night (ALAN) is a recently acknowledged form of anthropogenic pollution of growing concern to the biology and ecology of exposed organisms. Though ALAN can have detrimental effects on physiology and behaviour, we have little understanding of how marine organisms in coastal areas may be impacted. Here, we investigated the effects of ALAN exposure on coral reef fish larvae during the critical recruitment stage, encompassing settlement, metamorphosis, and post-settlement survival. We found that larvae avoided illuminated settlement habitats, however those living under ALAN conditions for 10 days post-settlement experienced changes in swimming behaviour and higher susceptibility to nocturnal predation. Although ALAN-exposed fish grew faster and heavier than control fish, they also experienced significantly higher mortality rates by the end of the experimental period. This is the first study on the ecological impacts of ALAN during the early life history of marine fish.

Original languageEnglish
Pages (from-to)908-914
Number of pages7
JournalMarine Pollution Bulletin
Volume146
DOIs
Publication statusPublished - 1 Sep 2019
Externally publishedYes

Keywords

  • Coral reefs
  • Fish larvae
  • Light pollution
  • Metamorphosis
  • Recruitment

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