CONTRIBUTION TO THE KNOWLEDGE OF PERCNON GIBBESI (DECAPODA, GRAPSIDAE), AN EXOTIC SPECIES SPREADING RAPIDLY IN SICILIAN WATERS

Authors: Pipitone, Carlo1; Badalamenti, Fabio1; Sparrow, Alice2

Source: Crustaceana, Volume 74, Number 10, 2001 , pp. 1009-1017(9)

Publisher: BRILL

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Abstract:

Percnon gibbesi, a subtropical crab recently recorded for the first time in the Mediterranean, has now been found at Pantelleria (Strait of Sicily) and on the coast of mainland Sicily. The main morphological traits of the collected specimens are presented. It seems that P. gibbesi is forming stable populations in Sicilian waters, where juveniles as well as ovigerous females have been found. A few hypotheses are suggested to explain the spread of this species into the western Mediterranean: (i) wide capability of adaptation, (ii) larval strategy, (iii) favourable environmental conditions, probably linked to recent climate change, and (iv) absence of competitors.

Percnon gibbesi, un crabe subtropical, récemment observé pour la première fois en Méditerranée vient d'être trouvé à Pantelleria (détroit de Sicile) et sur la côte de Sicile même. Les principaux caractères morphologiques des échantillons récoltés sont présentés. Il semble que P. gibbesi de Sicile constitue des populations stables dans les eaux siciliennes où ont été trouvés aussi bien des juvéniles que des femelles ovigères. Quelques hypothèses sont avancées afin de comprendre la distribution de l'espèce en Méditerranée occidentale: (i) large capacité d'adaptation, (ii) stratégie larvaire, (iii) conditions environnementales favorables, probablement liées au récent changement climatique et (iv) absence de compétiteurs.

Document Type: Research article

DOI: http://dx.doi.org/10.1163/15685400152691061

Affiliations: 1: C.N.R.-I.R.M.A., Laboratorio di Biologia Marina, via Giovanni da Verrazzano 17, I-91014 Castellammare del Golfo (TP), Italy 2: Queen Mary & Westfield College, University of London, Mile End Road, London E1 4NS, United Kingdom

Publication date: 2001-11-01

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