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Mass Settlement and Post-Settlement Mortality of Epinephelus Merra (Pisces: Serranidae) On Réunion Coral Reefs

Published online by Cambridge University Press:  11 May 2009

Yves Letourneur
Affiliation:
Université de La Réunion, Laboratoire d'Ecologie Marine, 97715 Saint Denis Messag Cedex 9, La Réunion, France.
Pascale Chabanet
Affiliation:
Université de La Réunion, Laboratoire d'Ecologie Marine, 97715 Saint Denis Messag Cedex 9, La Réunion, France.
Laurent Vigliola
Affiliation:
Centre d'Océanologie de Marseille, Station Marine d'Endoume, CNRS UMR DIMAR, 13007 Marseille, France.
Mireille Harmelin-Vivien
Affiliation:
Centre d'Océanologie de Marseille, Station Marine d'Endoume, CNRS UMR DIMAR, 13007 Marseille, France.

Extract

An unusual mass settlement event of the grouper Epinephelus merra occurred on the fringing coral reefs of Reunion Island (south-western Indian Ocean) in April 1994. This major event coincided with stormy conditions associated with the new moon period. The abundance of new settlers was surveyed for 45 days following settlement on both the reef flat and the back reef area of the coral reefs of St Gilles, La Saline and St Leu. Mean densities of settlers were higher on reef flats (maximum 474 ind/20 m2 at La Saline) than on back reef areas (maximum 156 ind/20 m2 at La Saline). Seven weeks later, densities of settled E. merra had drastically decreased, and did not differ with site and zone (18.5 ind/20 m2). Percentages of post-settlement mortality at that period ranged from 85 to 88% in back reef areas and from 93 to 95% on reef flats. A strong correlation between density of recruits and per capita mortality suggests density-dependent early post-settlement mortality for E. merra. The limitation of food resources and shelters, perhaps combined with an increase of diseases due to high population densities of settlers, was probably the main cause of mortality just after the mass settlement. Predation by reef fish, including cannibalism between settlers, is probably responsible for most subsequent mortality.

Type
Research Article
Copyright
Copyright © Marine Biological Association of the United Kingdom 1998

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References

Beets, J. & Hixon, M.A., 1994. Distribution, persistence, and growth of groupers (pisces: Serranidae) on artificial and natural patch reefs in the Virgin Islands. Bulletin of Marine Sciences, 55, 470483.Google Scholar
Campana, S.E. & Neilson, J.D., 1985. Microstructure of fish otoliths. Canadian Journal of Fisheries and Aquatic Science, 42, 10141032.CrossRefGoogle Scholar
Carr, M.H. & Hixon, M.A., 1995. Predation effects on early post-settlement survivorship of coral reef fishes. Marine Ecology Progress Series, 124, 3142.CrossRefGoogle Scholar
Chabanet, P., 1994. Etude des relations entre les peuplements benthiques et les peuplements ichtyologiques sur le complexe récifal de St-Gilles La Saline à l'îile de la Réunion. Thèse Environnement marin, Université Aix-Marseille 3, France.Google Scholar
Chabanet, P., Dufour, V. & Galzin, R., 1995. Disturbance impact on reef fish communities in Réunion Island (Indian Ocean). Journal of Experimental Marine Biololgy and Ecology, 188, 2948.CrossRefGoogle Scholar
Cowen, R.K., 1985. Large scale pattern of recruitment by the labrid, Semicossyphus pulcher. causes and implications. Journal of Marine Research, 43, 719742.CrossRefGoogle Scholar
Cowen, R.K., 1991. Variation in the planktonic larval duration of the temperate wrasse Semicossyphus pulcher. Marine Ecology Progress Series, 69, 915.Google Scholar
Doherty, P.J., 1991. Spatial and temporal patterns in recruitment. In The ecology of fishes on coral reefs (ed. P.F., Sale), pp. 261293. San Diego: Academic Press.CrossRefGoogle Scholar
Doherty, P.J. & Fowler, A.J., 1994. An empirical test of recruitment limitation in a coral reef fish. Science, New York, 263, 935939.CrossRefGoogle Scholar
Doherty, P.J., Samoilys, M., Fowler, A.J., Harris, D. & Squire, L., 1994. Monitoring the replenishment of coral trout (Pisces: Serranidae) populations. Bulletin of Marine Sciences, 54, 343355.Google Scholar
Doherty, P.J. & Williams, D.McB., 1988. The replenishment of coral reef fish populations. Oceanographical Marine and Biology. Annual Review, 26, 487551.Google Scholar
Dufour, V. & Galzin, R., 1993. Colonization patterns of reef fish larvae to the lagoon at Moorea Island, French Polynesia. Marine Ecology Progress Series, 102, 143152.CrossRefGoogle Scholar
Eggleston, D.B., 1995. Recruitment in Nassau grouper Epinephehts striatus: post-settlement abundance, microhabitat features, and ontogenetic habitat shifts. Marine Ecology Progress Series, 124, 922.CrossRefGoogle Scholar
Fourmanoir, P., 1971. Liste des espèces de poissons contenus dans les estomacs de thons jaunes, Thunnus albacares (Bonnaterre, 1788) et de thons blancs, Thunnus alalunga (Bonnaterre, 1788). Cahiers ORSTOM. Série Océanographie, 9, 109118.Google Scholar
Grandperrin, R., 1975. Structures trophiques aboutissant aux thons de longue ligne dans le Pacifique sud-ouest tropical. Mémoires ORSTOM, Paris, 296 pp.Google Scholar
Heemstra, P.C. & Randall, J.E., 1993. FAO species catalogue. Vol. 16. Groupers of the World (family Serranidae, subfamily Epinephelinae). An annotated and illustrated catalogue of the group, rock cod, hind, coral grouper and lyretail species known to date. FAO Fisheries Synopsis, 16, no. 125, 1382.Google Scholar
Jones, C., 1986. Determining age of larval fish with the otolith increment technique. Fisheries Bulletin, 84, 91103.Google Scholar
Jones, G.P. 1991. Post recruitment processes in the ecology of coral reef populations: a multifactorial perspective. In The ecology of fishes on coral reefs (ed. P.F., Sale), pp. 294—328. San Diego: Academic Press.CrossRefGoogle Scholar
Kami, H.T. & Ikehara, I.I., 1976. Notes on the annual juvenile siganid harvest in Guam. Micronesica, 12, 323325.Google Scholar
Leis, J.M., 1991. The pelagic stage of reef fishes: the larval biology of coral reef fishes. In The ecology of fishes on coral reefs (ed. P.F., Sale), pp. 183230. Academic Press Inc., San Diego.Google Scholar
Letourneur, Y., 1992. Dynamique des peuplements ichtyologiques des platiers récifaux de l'île de la Réunion. These Océanographie Biologique., Université d'Aix-Marseille 2, France.Google Scholar
Letourneur, Y., 1996. Dynamics of fish communities on Réunion friging reefs, Indian Ocean. I: patterns of spatial distribution. Journal of Experimental Marine Biology and Ecology, 195, 130.CrossRefGoogle Scholar
Letourneur, Y. & Chabanet, P., 1994. Variations spatio-temporelles de l'ichtyofaune de platiers récifaux à La Réunion. Cybium, 18, 2538.Google Scholar
Meekan, M.G., 1988. Settlement and mortality patterns of juvenile reef fishes at Lizard Island, northern Great Barrier Reef. In Proceedings of the 6th International Coral Reef Symposium, Townsville, Australia, 8–12 August, 1988, vol. 2 (ed. J.H., Choat et al.), pp. 779784. Townsville, Australia: 6th ICRS Executive Committee.Google Scholar
Montaggioni, L.F. & Faure, G., 1980. Les récifs coralliens des Mascareignes. Collection des Travaux de l'Université Française de l'Océan Indien, 1, 1151.Google Scholar
Munro, J.L., 1987. Workshop synthesis and directions for future research. In Tropical snappers and groupers: biology and fisheries management (ed. J.J., Polovina and S., Ralston), pp. 639659. Boulder: Westview Press, Inc.Google Scholar
Naim, O., 1993. Seasonal responses of a fringing reef community to eutrophication (Réunion Island, western Indian Ocean). Marine Ecology Progress Series, 99, 307315.Google Scholar
Pillai, C.S.G., Mohan, M. & Kunhikoya, K.K., 1983. On an unusual massive recruitment of the reef fish Ctenochaetus strigosus (Bennet) (Perciformes: Acanthuridae) to the Minicoy atoll and its significance. Indian Journal of Fishes, 30, 261268.Google Scholar
Quod, J.P., 1994. Ostreopsis mascarenensis sp. nov. (Dinophycae), dinoflagellé toxique associé à la ciguatera dans l'Océan Indien. Cryptologie et Algologie, in press.Google Scholar
Reintjes, J.W. & King, J.W., 1953. Food of the yellowfin tuna in the central Pacific. Fisheries Bulletin, 54, 92110.Google Scholar
Robertson, D.R., 1988. Extreme variation in settlement of the Caribbean triggerfish Balistes vetula in Panama. Copeia 1988, 3, 698703.Google Scholar
Roux, O., 1994. Biologie et écologie du pêche-cavale (Selar crumenocephalus) à l'ile de La Réunion. Mémoire DEA Université d'Aix-Marseille 2, 40 pp.Google Scholar
Sale, P.F., 1991. Reef fish communities: open nonequilibrial systems. In The ecology of fishes on coral reefs (ed. P.F., Sale), pp. 564598. San Diego: Academic Press Inc.CrossRefGoogle Scholar
Schultz, E.T. & Cowen, R.K., 1994. Recruitment of coral-reef fishes to Bermuda: local retention or long-distance transport? Marine Ecology Progres Series, 109, 1528.Google Scholar
Shenker, J.M., Maddox, E.D., Wishinski, E., Pearl, A., Thorrold, S.R. & Smith, N., 1993. Onshore transport of settlement-stage Nassau grouper Epinephelus striatus and other fishes in Exuma Sound, Bahamas. Marine Ecology Progress Series, 98, 3143.Google Scholar
Shulman, M.J. & Ogden, J.C., 1987. What controls tropical reef fish populations: recruitment or benthic mortality? An example in the Caribbean reef fish Haemulon flavolineatum. Marine Ecology Progress Series, 39, 233242.Google Scholar
Thorrold, S.R., Shenker, J.M., Wishinski, E., Mojica, R. & Maddox, E.D., 1994. Larval supply of shorefishes to nursery habitats around Lee Stocking Island, Bahamas. I. Small-scale distribution patterns. Marine Biology, 118, 555566.CrossRefGoogle Scholar
Tupper, M. & Boutilier, R.G., 1995. Effects of conspecific density on settlement, growth and post-settlement survival of a temperate reef fish. Journal of Experimental Marine Biology and Ecology, 191, 209222.Google Scholar
Tupper, M. & Hunte, W., 1994. Recruitment dynamics of coral reef fishes in Barbados. Marine Ecology Progress Series, 108, 225235.Google Scholar
Victor, B.C., 1986. Larval settlement and juvenile mortality in a recruitment-limited coral reef fish population. Ecological Monographs, 56, 145160.CrossRefGoogle Scholar
Victor, B.C., 1991. Settlement strategies and biogeography of reef fishes. In The ecology of fishes on coral reefs (ed. P.F., Sale), pp. 231260. San Diego: Academic Press Inc.Google Scholar