The new potential invader Linopherus canariensis (Polychaeta: Amphinomidae) in a Mediterranean coastal lake: Colonization dynamics and morphological remarks
Cosentino, A.; Giacobbe, S. (2011). The new potential invader Linopherus canariensis (Polychaeta: Amphinomidae) in a Mediterranean coastal lake: Colonization dynamics and morphological remarks. Mar. Pollut. Bull. 62(2): 236-245. http://dx.doi.org/10.1016/j.marpolbul.2010.11.006
In: Marine Pollution Bulletin. Macmillan: London. ISSN 0025-326X; e-ISSN 1879-3363, more
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| Keywords |
Linopherus Quatrefages, 1866 [WoRMS]
Marine/Coastal |
| Author keywords |
Linopherus; Introduced species; Asexual multiplication; Feeding; Mediterranean |
| Authors | | Top |
- Cosentino, A.
- Giacobbe, S.
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| Abstract |
The newly introduced polychaete Linopherus canariensis Langerhans, 1881 was found in the Lake of Faro (NE Sicily), during a study comparing the macrobenthos in artificial modules with a neighboring sandy bottom assemblage. Of a total of 4465 specimens, almost 6% showed morphological variation related to branchial turfs and mean body size. The sandy bottom exhibited an average density of 41.86 ind L−1 and a wet biomass of 30.35 mg L−1, whereas the artificial substratum reached levels of 205.29 ind L−1 and 318.44 mg L−1. The highest estimated immigration rate was 3.7 ind L−1 d−1 (5.8 mg L−1 d−1). In the artificial microhabitat, 0.4% of the population showed mid-anterior fragmentation, with anterior- (2%), mid- (<1%) and posterior- (1%) regenerating lineages, which contributed significantly to the dispersion ability of this species. L. canariensis was a selective micro-deposit feeder, even under conditions of reduced sediments. Linopherus was found to be a new potential invader of stressed environments that is probably tied to the import of oysters. |
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