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Journal Molluscan Studies Advance Access published online on July 28, 2008
Journal of Molluscan Studies, doi:10.1093/mollus/eyn021
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© The Author 2008. Published by Oxford University Press on behalf of The Malacological Society of London, all rights reserved

JUJUBINUS STRIATUS (LINNAEUS, 1758) (GASTROPODA: TROCHIDAE) FROM A DEEP ZOSTERA MARINA BED IN SOUTHERN SPAIN (ALBORAN SEA): ASPECTS OF ECOLOGY AND BIOLOGY

Jose L. Rueda, Pablo Marina, Carmen Salas and Javier Urra

Departamento de Biología Animal, Universidad de Málaga, Campus de Teatinos s/n, Málaga 29071, Spain

Correspondence: J.L. Rueda; e-mail: biologiamarina{at}uma.es


  Abstract

The malacofauna associated with Zostera marina beds in the Marine Protected Area ‘Acantilados de Maro-Cerro Gordo’ (southern Spain) includes a high number of species, but Jujubinus striatus is the dominant species throughout the year (dominance of 79.5% during day and 60.3% at night). The density of this trochid is maximal in the spring and summer months (up to 172.8 ± 62.4 individuals/m2) and ultrajuveniles (shell height <1 mm) occur in the eelgrass bed from February to October. The temporal dynamics of this species abundance is linked to that of the foliage of Z. marina over its annual cycle. Jujubinus striatus reproduces from at least March to November, according to a histological study of the gonads. The reproductive potential of the population is enhanced by early sexual maturity (at 2 mm size) and by the ability of a single individual to reproduce more than once a year. These reproductive features may be of importance for maintaining the J. striatus population at a high dominance level in this habitat.

(Received 18 January 2008; accepted 20 June 2008)


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