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A review of the giant triton (Charonia tritonis), from exploitation to coral reef protector?
Motti, C.A.; Cummins, S.F.; Hall, M.R. (2022). A review of the giant triton (Charonia tritonis), from exploitation to coral reef protector? Diversity 14(11): 961. https://dx.doi.org/10.3390/d14110961
In: Diversity. MDPI: Basel. ISSN 1424-2818; e-ISSN 1424-2818
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| Trefwoorden |
Charonia tritonis (Linnaeus, 1758) [WoRMS]; Gastropoda [WoRMS]
Marien/Kust |
| Author keywords |
aquaculture; biocontrol; Crown-of-Thorns starfish; indigenous predator; integrated pest management; marine gastropod; trophodynamics; predation efficiency |
| Auteurs | | Top |
- Motti, C.A.
- Cummins, S.F.
- Hall, M.R.
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| Abstract |
Charonia tritonis (Charoniidae), one of the largest marine gastropods and an echinoderm specialist, preys on Crown-of-Thorns starfish (CoTS), a recurring pest that continues to be a leading cause of coral mortality on Indo-Pacific reefs. Widespread historical exploitation has impacted their numbers, with standing populations considered rare throughout their habitat. Their life-stage attributes, i.e., teleplanic larvae, planktotrophic phase spanning years permitting transoceanic dispersal, and recruitment to coral reefs through oceanic influx with intense larval mortality, have likely hindered their recovery. Decline in numbers is hypothesised to account partially for periodic CoTS outbreaks, yet predator-prey dynamics between these two species that might influence this are poorly understood. The C. tritonis excretory secretome elicits a proximity deterrence effect on CoTS, the nature of which is under investigation as a possible tool in CoTS biocontrol scenarios. However, specificity and zone of impact in situ are unknown, and whether the mere presence of C. tritonis and/or predation pressure has any regulatory influence over CoTS populations remains to be established. The fundamental taxonomy and distinctive characteristics, biology and ecology of C. tritonis is summarized, and knowledge gaps relevant to understanding their role within coral reefs identified. Information is provided regarding exploitation of C. tritonis across its habitat, and prospects for conservation interventions, including captive rearing and stock enhancement to repopulate local regions, are discussed. Its predator-prey ecology is also examined and potential to mitigate CoTS considered. Recommendations to direct future research into this predator and for its inclusion in a CoTS integrated pest management strategy to improve coral reef health are offered. |
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