Larval Enhancement — Iou Lukes reef

OPP-QV3XJXpermanent identifier · cite as oceanportfolio.org/p/OPP-QV3XJX

Published as: Direct seeding of mass-cultured coral larvae is not an effective option for reef rehabilitation. | Technique: Larval Enhancement | Genera: Acropora | Method: Gravid colonies of A. digitifera were collected from nearby reefs and placed in in situ flow-through tanks, until they spawned. Gamete bundles were collected and placed in a fertilisation tank. Larvae were considered competent when >50% were competent to settle (using CCA chip to induce settlement). Larvae were then introduced to concrete Reef balls (pallet ball type), which was covered in a camping tent to contain the larvae on the artificial substrate. The mesh tent was removed after 24 hours… | Post-restoration monitoring: 12 months | Authors' conclusion: Seeding Reef Balls with larvae increased the settlement substantially after five weeks, however this this increase did not persist after 30 weeks. In addition, comparisons to visible recruits after 12 months revealed no difference between the treatment and control reef balls. The authors report a 4 fold increase in visible settlers compared to the background of natural recruitment, but speculate that this is because the area a;ready receives a relatively large contribution of recruiting larvae, compared other restoration sites. | Lessons reported: Authors concede that larval supplemental methods may be more suitable to places with low background recruitment levels. | This record was compiled from a published source and has not been confirmed by the organisation that carried out the work. No contribution to the condition index is recorded: the source reports survival of transplanted material, which is not a measure of ecosystem condition.

Recorded result

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