Restoring depleted coral-reef fish populations through recruitment enhancement: a proof of concept

Research output: Contribution to journalArticlepeer-review

Electronic versions

  • A Heenan
    University of Edinburgh
  • M G Meekan
  • S D Healy
  • Stephen Simpson
  • V A Braithwaite

To determine whether enhancing the survival of new recruits is a sensible target for the restorative management of depleted coral-reef fish populations, settlement-stage ambon damsel fish Pomacentrus amboinensis were captured, tagged and then either released immediately onto small artificial reefs or held in aquaria for 1 week prior to release. Holding conditions were varied to determine whether they affected survival of fish: half the fish were held in bare tanks (non-enriched) and the other half in tanks containing coral and sand (enriched). Holding fish for this short period had a significantly positive effect on survivorship relative to the settlement-stage treatment group that were released immediately. The enrichment of holding conditions made no appreciable difference on the survival of fish once released onto the reef. It did, however, have a positive effect on the survival of fish while in captivity, thus supporting the case for the provision of simple environmental enrichment in fish husbandry. Collecting and holding settlement-stage fish for at least a week before release appear to increase the short-term survival of released fish; whether it is an effective method for longer-term enhancement of locally depleted coral-reef fish populations will require further study.

Keywords

  • Animals, Body Size, Coral Reefs, Environmental Restoration and Remediation, Perciformes, Survival Analysis, Journal Article, Research Support, Non-U.S. Gov't
Original languageEnglish
Pages (from-to)1857-67
Number of pages11
JournalJournal of Fish Biology
Volume75
Issue number7
DOIs
Publication statusPublished - Nov 2009
Externally publishedYes
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