Abstract
Red coral (Corallium rubrum, L. 1758) is an over-exploited Mediterranean gorgonian. The gonadal development cycle of this gorgonian is examined at the Costa Brava (NW Mediterranean) taking into account for the first time colony size, depth and spatial horizontal variability. This study compares the gonad development and fertility in two colony size classes (colonies <6-cm height, and >10-cm height, both at 40–45-m depth), and two populations at different depths (16–18-m depth, and 40–45-m depth, both consisting of <6-cm high colonies) in a 15-month period. The fertility of seven size classes (<2 cm to >12 cm high colonies, in 2 cm intervals) was examined in the deep population, where large colonies were present. Furthermore, reproductive output was compared in 6 populations (distributed along more than 70-km coastline) one month before spawning (June). Red coral was found to be dioecious and gonochoric with a sex ratio of 1:1, which differs from other NW Mediterranean populations. On the other hand, fertility of different size classes indicates that small colonies of 2-cm height already produce gonads, which is in line with previous studies. Female and male polyp fertility and sperm sac size increase significantly with colony size [sperm sac diameter: 476±144 μm (mean±SD) and 305±150 μm in the >10-cm and <6-cm height colonies, respectively), whereas no significant effect on oocyte diameter was found (oocyte diameter: 373.7±18.7 μm). Depth staggered spawning, that is, an earlier release of gonads in the shallow populations, was observed in summer 2003, coinciding with the highest temperature gradient between shallow and deep water during the study period. Colonies of <6-cm height were significantly less fertile than colonies >12 cm, thus the recommendation of this study is that a minimum height should be incorporated into fishing regulations. The six studied populations at the Costa Brava showed a comparable reproductive potential, which demonstrates little variability within the homogenous population structure and range of size classes (due to overharvesting) found at the Costa Brava. The study of reproductive output is an important tool for ecosystem management, and this work recommends basing specific exploitation laws for distinctive populations on colony size, which is found to have a larger effect on reproductive potential than mesoscale variability.
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References
Arntz WE, Gili JM, Reise K (1999) Unjustifiably ignored: reflections on the role of benthos in marine ecosystems. In: Gray JS et al (eds) Biogeochemical cycling and sediment ecology. Kluwer Academic, The Netherlands, pp 105–124
Babcock RC (1984) Reproduction and distribution of two species of Goniastrea (Scleractinia) from the Great Barrier Reef Province. Coral Reefs 2:187–195
Babcock RC (1991) Comparative demography of three species of scleractinian corals using age- and size-dependent classification. Ecology 61:255–244
Beiring EA, Lasker HR (2000) Egg production by colonies of a gorgonian coral. Mar Ecol Prog Ser 196:169–177
Benayahu Y, Loya Y (1984) Life history studies on the red sea soft coral Xenia macrospiculata Gohar, 1940. I. Annual dynamics of gonadal development. Biol Bull 166:32–43
Benayahu Y, Berner T, Achituv Y (1989) Development of planulae within a mesogleal coat in the soft coral Heteroxenia fuscescens. Mar Biol 100:201–210
Bramanti L (2003) Dinamica di populazione ed adattamenti demografici di una popolazione costiera di corallo rosso (Corallium rubrum L. 1758) con particolare riferimento al reclutamento. Ph.D. Thesis, Universitá degli studi di Pisa
Bramanti L, Magagnini G, Santangelo G (2003) Settlement and recruitment: the first stages in the life cycle of two epibenthic suspension feeders (Corallium rubrum and Anomia ephippium). Ital J Zool 70:175–178
Bramanti L, Magagnini G, de Maio L, Santangelo G (2004) Recruitment, early survival and growth of the Mediterranean red coral Corallium rubrum (L 1758), a four year study. J Exp Mar Biol Ecol 314:69–78
Bramanti L, Rossi S, Tsounis G, Gili JM, Santangelo G (in press). Recruitment and early survival of red coral on settlement plates: some clues for demography and restoration. Hydrobiologia
Brazeau DA, Lasker HR (1989) The reproductive cycle and spawning in a Caribbean gorgonian. Biol Bull 176:1–7
Brazeau DA, Lasker HR (1990) Sexual reproduction and external brooding by the Caribbean gorgonian Briareum asbestinum. Mar Biol 104:465–474
Cebrián J, Duarte CM, Pascual J (1996) Marine climate in the Costa Brava (northwestern Mediterranean) littoral. Publ Espec Inst Esp Ocenogr 22:9–21
Coma R, Gili JM (1998) Benthic suspension feeders: their paramount role in littoral marine food webs. Trends Ecol Evol 13:316–321
Coma R, Ribes M, Zabala M, Gili JM (1995a) Reproduction and cyce of gonadal development in the Mediterranean gorgonian Paramuricea clavata. Mar Ecol Prog Ser 117:173–183
Coma R, Zabala M, Gili JM (1995b) Sexual reproductive effort in the Mediterranean gorgonian Paramuricea clavata. Mar Ecol Prog Ser 117:185–192
Connell JH (1973) Population ecology of reef building corals. In: Jones OA, Endean R (eds) Biology and geology of coral reefs. Academic Press, New York, pp 205–245
Dayton PK (2003) The importance of the natural sciences to conservation. Am Nat 162:1–13
Del Gaudio D, Fortunato G, Borriello M, Gili JM, Buono P, Calcagno G, Salvatore F, Sacchetti L (2004) Genetic typing of Corallium rubrum. Marine Biotecnol 6:511–515
Garrabou J, Perez T, Sartoretto S, Harmelin JG (2001) Mass mortality event in red coral Corallium rubrum populations in the Provence region (France, NW Mediterranean). Mar Ecol Prog Ser 217:263–272
Gili JM, Ros J (1984) L’estatge circalitoral de les Illes Medes: el coralligen. In: Ros J, Olivella I, Gili JM, Els Sistemes Naturals de les Illes Medes. Institut d’Estudis Catalans, Barcelona, pp 677–705
Gotelli NG (1991) Demographic models for Leptogorgia virgulata, a shallow-water gorgonian. Ecology 13:297–337
Grigg RW (1974) Growth rings: annual periodicity in two gorgonian corals. Ecology 55:876–881
Grigg RW (1976) Fisheries management of precious and stony corals in Hawaii. UNIHI-SEAGRANT-TR-77–03
Grigg RW (1977) Population dynamics of two gorgonian corals. Ecology 58:278–290
Grigg RW (1989) Precious coral fisheries of the Pacific and Mediterranean. In: JF Caddy (ed) Marine invertebrate fisheries: their assessment and management. Wiley, New York, pp 636–645
Hall VR, Hughes TP (1996) Reproductive strategies of modular organisms: comparative studies of reef-building corals. Ecology 77:950–963
Harland AD, Davies PS, Fixter LM (1992) Lipid content of some Caribbean corals in relation to depth and light. Mar Biol 113:357–361
Hughes TP, Jackson JBC (1985) Population dynamics and life histories of foliaceous corals. Ecol Monogr 55:141–166
Kim K, Lasker HR (1997) Flow-mediated resource competition in the suspension-feeding gorgonian Plexaura homomalla (Esper.). J Exp Mar Biol Ecol 215:49–64
Kinzie RA (1974) Plexaura homomalla: the biology and ecology of a harvestable marine resource. In: Bayer FM, Weinheimer AJ (eds) Prostaglandins from Plexaura homomalla. University of Miamy Press, Coral Gables, pp 22–57
Kojis BL, Quinn NJ (1981) Aspects of sexual reproduction and larval development in the shallow water hermatypic coral, Goniastrea australiensis (Edwards and Haime 1857). Bull Mar Sci 31:558–573
Lincoln R, Boxhall G, Clark P (1998) A dictionary for ecology, evolution and systematics. Cambridge University Press
Lloret J, Planes S (2003) Condition, feeding and reproductive potential of white seabream Diplodus sargus as indicators of habitat quality and the effect of reserve protection in the northwestern Mediterranean. Mar Ecol Prog Ser 248:197–208
Marschal C, Garrabou J, Harmelin JG, Pichon M (2004) A new method for measuring growth and age in precious red coral Corallium rubrum (L.). Coral Reefs 23:423–432
Mundy C, Babcock R (2000) Are vertical distribution patterns of scleractinian corals maintained by pre- or post-settlement processes? A case study of three contrasting species. Mar Ecol Prog Ser 198:109–119
Orejas C, López-González P, Gili JM, Teixidó N, Gutt J, Arntz W (2002) Distribution and reproductive ecology of the Antarctic octocoral Ainigmaptilon antarcticum in the Weddell Sea. Mar Ecol Prog Ser 231:101–114
Pascual J, Lloret L, Salat J, Zabala M (1995) Projecte de determinació de la circulació de les aigües de la Reserva Marina de les Illes Medes. Informe técnic per la Direcció General de Pesca MarÌtima, Generalitat de Catalunya
Rinkevich B, Loya Y (1984) The reproduction of the red sea coral Stylophora pistillata. I. Gonads and planulae. Mar Ecol Prog Ser 1:133–144
Sakai K (1998) Delayed maturation in the colonial coral Gonasteria aspera (Scleractinia): whole-colony mortality, colony growth and polyp egg production. Res Popul Ecol 40:287–292
Santangelo G, Abbiati M (2001) Red coral: conservation and management of an over-exploited Mediterranean species. Aquat Conserv: Mar Freshwater Ecosyst 11:253–259
Santangelo G, Abiatti M, Caforio G (1993) Age structure and population dynamics in Corallium rubrum. In: Cicogna F, Cattaneo-Vietti R (eds) Red coral in the Mediterranean Sea: art, history and science. Ministerio delle Risorse Agricole, Almentari e Forestali, Roma, pp 131–157
Santangelo G, Maggi E, Bramanti L, Bongiorni L (2003a) Demography of the over-exploited Mediterranean red coral (Corallium rubrum L. 1758) Sci Mar 68:199–204
Santangelo G, Carletti E, Maggi E, Bramanti L (2003b) Reproduction and population sexual structure of the overexploited Mediterranean red coral Corallium rubrum. Mar Ecol Prog Ser 248:99–108
Sará M (1969) Research on coralligenous formation; problems and perspectives. Publ staz zool Napoli 37:124–134
Soong K (1993) Colony size as a species character in massive reef corals. Coral reefs 12:77–83
Stiller MA, Rivoire G (1984) Biologie et ècologie du corail rouge en Méditerranée française. FAO Fish Rep 306:89–93
Szmant-Froehlich AM (1981) Reproductive ecology of caribbean reef corals. Coral reefs 5:43–54
Szmant-Froehlich AM (1985) The effect of colony size on the reproductive ability of the Caribbean coral Monastrea annularis (Ellis and Solander). Proc fifth Int Coral Reef Congr 4:295–300
Tescione G (1973) The Italians and their coral fishing. Fausto Fiorino, Naples, Italy
Tioho H, Tokrshi M, Nojima S (2001) Experimental analysis of recruitment in a scleractinian coral at high latitude. Mar Ecol Prog Ser 213:79–86
Tsounis G (2005) Demography, reproductive biology and trophic ecology of red coral (Corallium rubrum L.) at the Costa Brava (NW Mediterranean): ecological data as a tool for management. Ph.D. Thesis, University of Bremen, Germany
Vighi M (1972) Étude sur la reproduction du Corallium rubrum (L.). Vie Milieu vol XXIII fase 1, sér A, pp 21–32
Ward S (1995a) Two patterns of energy allocation for growth, reproduction and lipid storage in the scleractinian coral Pocillopora damicornis. Coral Reefs 14:87–90
Ward S (1995b) The effect of damage on the growth, reproduction and storage of lipids in the scleractinian coral Pocillopora damicornis (Linnaeus). J Exp Mar Biol Ecol 187:193–206
Weinberg S (1979) The light dependent behaviour of planula larvae of Eunicella singularis and Corallium rubrum and its implication for octocorallian ecology. Bijdr Dierk 49:145–151
Weinberg S, Weinberg F (1979) The life cycle of a gorgonian: Eunicella singularis (Esper 1794). Bijdr Dierk 48:127–137
West JM, Harvell CD, Walls AM (1993) Morphological plasticity in a gorgonian coral (Briareum asbestinum) over a depth cline. Mar Ecol Prog Ser 94:61–69
Zar JH (1996) Biostatistical Analysis. Prentice-Hall
Acknowledgements
We gratefully acknowledge helpful comments by C. Orejas and G. Santangelo and three anonymous referees that greatly improved the final version of the manuscript. N. Fernández provided invaluable help during SCUBA diving fieldwork and sample processing. We also thank C. Linares, D. Diaz and G. Mas for help during sampling for size of first reproduction. Thanks to J. Metzner, P. Claver and T. Padron for sample processing. We also thank the collaboration of the family Mörker at Roses and the family Riera at Cadaqués. The professional divers of the Trepa helped S. Rossi in the sampling at Cap de Creus. Many thanks to J.M. Llenas for support at the Medas Islands. G. Tsounis was supported by a Ph.D. scholarship from the University of Bremen, Germany. This study was supported by a IFOP grant from the Generalitat de Catalunya (Spain).
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Communicated by O. Kinne, Oldendorf/Luhe
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Tsounis, G., Rossi, S., Aranguren, M. et al. Effects of spatial variability and colony size on the reproductive output and gonadal development cycle of the Mediterranean red coral (Corallium rubrum L.). Marine Biology 148, 513–527 (2006). https://doi.org/10.1007/s00227-005-0100-8
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DOI: https://doi.org/10.1007/s00227-005-0100-8