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Kefalas, E.; Castritsi-Catharios, I; Miliou, H. (2003). The impacts of scallop dredging on sponge assemblages in the Gulf of kalloni (Aegean Sea, northeastern Mediterranean). ICES Journal of Marine Science. 60, 402-10.
Kefalas, E.; Castritsi-Catharios, I; Miliou, H.
The impacts of scallop dredging on sponge assemblages in the Gulf of kalloni (Aegean Sea, northeastern Mediterranean).
ICES Journal of Marine Science
60, 402-10
Available for editors  PDF available
Concerns have been raised on the impact of bottom-fishing activities in the shallow Gulf of Kalloni (Lesvos Island, Aegean Sea). Fishing with demersal gears was banned in 1995, but the Gulf was reopened in 1998 only for scallop dredging using the ‘‘lagamna’’ gear. Two series of samplings were done with this gear in 1998 and 1999 (October) before the beginning of scallop-fishing period (from November up to March), aiming to investigate possible changes in sponge assemblages. Sponges (Porifera) were the most abundant mesomegafaunal benthic organisms in the Gulf, besides scallops and other bivalves. Total abundance, number of species, species diversity, species richness and evenness of sponge assemblages reduced significantly from the year 1998 to 1999. The population of the excavating Cliona celata, the only infaunal sponge species found in the Gulf, decreased. Multivariate analysis on the abundance data of epibenthic sponge species revealed a clear separation of samples collected during the 2 years, indicating changes in the structure of sponge assemblages. The distinguishing species included a variety of growth forms: massive (Mycale massa, Suberites domuncula and Tethya citrina), lobose (Suberites massa, Tedania anhelans and Halichondria panicea), erect branching (Raspailia viminalis), encrusting (Crambe crambe) and cushion-shaped (Mycale contarenii and Chondrilla nuculla) sponges. Among these species, only S. massa increased its abundance in 1999. All others decreased. No significant loss of information occurred when multivariate analysis was applied to abundance data of genera or families. This comparative study demonstrated that the time interval between two consecutive scallop-fishing periods was insufficient for the recovery of sponge assemblages. It is concluded that scallop dredging causes long-term changes in the structure and biodiversity of sponge assemblages in the Gulf of Kalloni. An improved strategy of fishery management is required in future for the conservation of living resources in this Gulf.
Mediterranean Sea in general
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2015-03-28 19:07:10Z

Acanthella acuta Schmidt, 1862 (additional source)
Aplysina aerophoba (Nardo, 1833) (additional source)
Aplysina cavernicola (Vacelet, 1959) (additional source)
Axinella damicornis (Esper, 1794) (additional source)
Axinella verrucosa (Esper, 1794) (additional source)
Cacospongia scalaris Schmidt, 1862 accepted as Scalarispongia scalaris (Schmidt, 1862) (additional source)
Chondrilla nucula Schmidt, 1862 (additional source)
Chondrosia reniformis Nardo, 1847 (additional source)
Clathria (Microciona) cleistochela Topsent, 1925 (additional source)
Clathria (Microciona) gradalis Topsent, 1925 (additional source)
Clathria (Microciona) toxivaria (Sarà, 1959) accepted as Clathria (Clathria) toxivaria (Sarà, 1959) (basis of record)
Clathria (Thalysias) jolicoeuri (Topsent, 1892) (additional source)
Cliona celata Grant, 1826 (additional source)
Crambe crambe (Schmidt, 1862) (additional source)
Dysidea fragilis (Montagu, 1814) (additional source)
Dysidea incrustans (Schmidt, 1862) (additional source)
Erylus discophorus (Schmidt, 1862) (additional source)
Eurypon major Sarà & Siribelli, 1960 (additional source)
Geodia cydonium (Linnaeus, 1767) (additional source)
Halichondria panicea (Pallas, 1766) represented as Halichondria (Halichondria) panicea (Pallas, 1766) (additional source)
Haliclona cinerea (Grant, 1826) represented as Haliclona (Reniera) cinerea (Grant, 1826) (additional source)
Haliclona implexa (Schmidt, 1868) represented as Haliclona (Soestella) implexa (Schmidt, 1868) (additional source)
Haliclona mucosa (Griessinger, 1971) represented as Haliclona (Soestella) mucosa (Griessinger, 1971) (additional source)
Haliclona simulans (Johnston, 1842) represented as Haliclona (Haliclona) simulans (Johnston, 1842) (additional source)
Haliclona subtilis Griessinger, 1971 represented as Haliclona (Reniera) subtilis Griessinger, 1971 (additional source)
Halisarca dujardinii Johnston, 1842 (additional source)
Hippospongia communis (Lamarck, 1814) (additional source)
Hymedesmia peachii Bowerbank, 1882 represented as Hymedesmia (Hymedesmia) peachii Bowerbank, 1882 (additional source)
Hymedesmia versicolor (Topsent, 1893) represented as Hymedesmia (Hymedesmia) versicolor (Topsent, 1893) (additional source)
Hymeniacidon perlevis (Montagu, 1814) (additional source)
Ircinia variabilis (Schmidt, 1862) (additional source)
Lissodendoryx isodictyalis (Carter, 1882) represented as Lissodendoryx (Lissodendoryx) isodictyalis (Carter, 1882) (additional source)
Mycale (Aegogropila) contarenii (Lieberkühn, 1859) (additional source)
Mycale (Aegogropila) rotalis (Bowerbank, 1874) (additional source)
Mycale (Carmia) macilenta (Bowerbank, 1866) (additional source)
Mycale (Mycale) massa (Schmidt, 1862) (additional source)
Myxilla (Myxilla) rosacea (Lieberkühn, 1859) (additional source)
Oceanapia fistulosa (Bowerbank, 1873) (additional source)
Oscarella lobularis (Schmidt, 1862) (additional source)
Petrosia ficiformis (Poiret, 1789) represented as Petrosia (Petrosia) ficiformis (Poiret, 1789) (additional source)
Phorbas paupertas sensu Boury-Esnault, 1971 accepted as Phorbas topsenti Vacelet & Pérez, 2008 (additional source)
Raspaciona aculeata (Johnston, 1842) (additional source)
Sarcotragus foetidus Schmidt, 1862 (additional source)
Spongia officinalis Linnaeus, 1759 represented as Spongia (Spongia) officinalis Linnaeus, 1759 (additional source)
Spongia virgultosa (Schmidt, 1868) represented as Spongia (Spongia) virgultosa (Schmidt, 1868) (additional source)
Spongia zimocca Schmidt, 1862 represented as Spongia (Spongia) zimocca Schmidt, 1862 (additional source)
Suberites carnosus (Johnston, 1842) (additional source)
Suberites domuncula (Olivi, 1792) (additional source)
Suberites massa Nardo, 1847 (additional source)
Tedania anhelans (Vio in Olivi, 1792) represented as Tedania (Tedania) anhelans (Vio in Olivi, 1792) (additional source)
Tethya aurantium (Pallas, 1766) (additional source)
Tethya citrina Sarà & Melone, 1965 (additional source)
Timea stellata (Bowerbank, 1866) (additional source)