Abstract
During a survey in Santa Gilla, a Tyrrhenian lagoon located in southern Sardinia, several specimens of the alien polychaete Naineris setosa were found. 1) A brief description of the specimens is presented; they possess the rounded prostomium and the crenulated capillary chaetae typical of the genus, but they are characterized by the absolute lacking of uncini or subuluncini in thoracic neuropodia, which is unique trait within Naineris; 2) some environmental characteristics of the collection site are measured; 3) the description and the distribution of the specimens are also provided.
Highlights
Introduction pathwayThe material described was collected in a period running from two years before to one year later the first collecting in Tunisia (Khedhri et al 2014), revealing the Station Day Latitude Longitude Depth Temperature (°C) Salinity S1 19/10/2010 S2 S3
The aim of this paper is to report the first record of this non-indigenous species in a Thyrrenian lagoon (Santa Gilla - southern cost of Sardinia), and to provide a description of its distribution
Specimens of N. setosa were collected in Santa Gilla lagoon during the sampling campaigns from 2010 to 2014 suggesting a successful establishment of the species
Summary
Species belonging to the class Polychaeta can be found in every marine benthic environment from littoral to hadal depths. They play a key role in the trophic ecology of these habitats since they are usual prey for fish and other demersal animals. Many polychaete species show a remarkable ecological plasticity and can adapt to new environments, so these species might have the capacity to become invasive when translocate to new geographic areas. Polychaetes rank third in the list of animal groups containing more alien species in the Mediterranean, only behind molluscs and crustaceans, and first in the Italian coasts (Zenetos et al 2012; Occhipinti-Ambrogi et al 2010)
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