Abstract
This study reports on the reproduction activity of Exogone naidina Örsted, 1845, followed on a hard-bottom population located at a site along the coast of Bari (South Adriatic Sea), during a year of study from November 2000 to October 2001. Population structure was analysed together with the reproductive state of individuals over time. The interpretation of frequency histograms computed on the total worm length was not easy because of the almost complete lack of juvenile forms. Ripe individuals were present for most of the year, covering a large range of sizes. The reproductive season extended from April to December, with two peaks of activity: one from April to June and one in September–October. Life span was hypothesized to be up to 1 year, with generational change clearly visible only in late summer. However, the prolonged reproductive period produces an overlapping of generations. The link between population density and the reproductive cycle of the species with food availability is also discussed.
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References
Bührmann C, Westheide W, Purschke G (1996) Spermatogenesis and sperm ultrastructure in the interstitial syllid Petitia amphophtalma (Anellida, Polychaeta). Ophelia 45:81–100
Cazaux C (1972) Développement larvaire d’Annélides Polychètes (Bassin d’Arcachon). Arch Zool Exp Gén 113:71–108
Daly JM (1975) Reversible epitoky in the life history of the polychaete Odontosyllis polycera (Schmarda, 1861). J Mar Biol Assoc UK 55:327–344
Fisher A, Fisher U (1995) On the life style and life-cycle of the luminescent polychaete Odontosyllis enopla (Annelida: Polychaeta). Invertebr Biol 114:236–247
Franke HD (1986) The role of light and endogenous factors in the timing of the reproductive cycle of Typosyllis prolifera and some other polychaetes. Am Zool 26:433–445
Franke HD (1999) Reproduction of the Syllidae (Annelida: Polychaeta). Hydrobiologia 402:39–55
Garwood PR (1982) The life-cycle and population dynamics of Streptosyllis websteri (Polychaeta: Syllidae) from a Northumberland beach: J Mar Biol Assoc UK 62:783–798
Garwood PR (1991) Reproduction and the classification of the family Syllidae (Polychaeta). Ophelia [Suppl] 5:81–87
Giangrande A (1989) Distribution and reproduction of syllids (Annelida: Polychaeta) along a vertical cliff (West Mediterranean). Oebalia 16:68–85
Giangrande A (1997) Polychaete reproductive patterns, life cycles and life histories: an overview. Oceanogr Mar Biol Annu Rev 35:323–386
Giangrande A, Sciscioli M, Lepore E, Mastrodonato M, Lupetti P, Dallai R (2002) Sperm ultrastructure and spermiogenesis in two Exogone species (Polychaeta, Syllidae, Exogoninae). Invertebr Biol 121:339–349
Goodrich ES (1933) Notes on Odontosyllis. Q J Microsc Sci 76:319–329
Herpin R (1925) Recherches biologique sur la reproduction et le development de quelques Annélides Polychètes. Bull Soc Sci Nat Ouest Fr 5:1–250
Malaquin A (1893) Recherches sur les Syllidiens. Morphologie, anatomie, reproduction, développement. Mém Soc Sci Agric Lille 18:1–477
Mastrodonato M, Sciscioli M, Lepore L, Gherardi M, Giangrande A, Mercati D, Dallai R, Lupetti P (2003) External gestation of Exogone naidina Öersted, 1845 (Polychaeta, Syllidae): ventral attachment of eggs and embryos. Tissue Cell 35:297–305
Millonig G (1976) Laboratory manual of biological electronmicroscopy. Saviolo, Vercelli, pp 1–59
Nygren A (1999) Phylogeny and reproduction in Syllidae (Polychaeta). Zool J Linn Soc Lond 126:365–386
Olive PJW, Garwood PR (1981) Gametogenic cycle and population structure of Nereis (Hediste) diversicolor and Nereis (Nereis) pelagica from North-East England. J Mar Biol Assoc UK 61:193–213
Potts FA (1911) Methods of reproduction in the syllids. Ergebn Fortschr Zool 3:1–72
Rassmussen E (1973) Systematics and ecology of the Isefjord marine fauna (Denmark). Ophelia 11:1–49
San Martín G (2003) Annelida, Polychaeta II: Syllidae. (Fauna Iberica, vol 21) Museo Nacional de Ciencias Naturales, CSIC, Madrid, pp 1–554
Sardà R, San Martín G (1992) Streptosyllis verrilli (Moore, 1907), new combination, life cycle, population dynamics and production from a salt marsh in southern New England. Bull Mar Sci 51:407–419
Schiedges KL (1979) Reproductive biology and ontogenesis in the polychaete genus Autolytus (Annelida: Syllidae): observations on laboratory-cultured individuals. Mar Biol 104:61–66
Westheide W (1984) Genesis and structure of the modified spermatozoon in the interstitial polychaete Hesionides arenaria (Annelida). Biol Cell 50:53–66
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This study was supported by 60% funds from the Italian Ministry of University and Research.
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Communicated by R. Cattaneo-Vietti, Genova
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Gherardi, M., Mastrodonato, M., Sion, L. et al. Reproduction activity of Exogone naidina (Polychaeta: Exogoninae) in a population from the Apulian coast (Adriatic Sea). Marine Biology 147, 197–203 (2005). https://doi.org/10.1007/s00227-004-1550-0
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DOI: https://doi.org/10.1007/s00227-004-1550-0