Exploring the Structure of Static Net Fisheries in a Highly Invaded Region: The Case of Rhodes Island (Eastern Mediterranean)

Gerasimos Kondylatos (), Georgios Vagenas, Konstantinos Kalaentzis, Dimitris Mavrouleas, Alexios Conides, Paraskevi K. Karachle, Maria Corsini-Foka and Dimitris Klaoudatos
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Gerasimos Kondylatos: Hydrobiological Station of Rhodes, Hellenic Centre for Marine Research, 85131 Rhodes, Greece
Georgios Vagenas: Institute of Marine Biological Resources and Inland Waters, Hellenic Centre for Marine Research, 19013 Anavissos, Greece
Konstantinos Kalaentzis: Hydrobiological Station of Rhodes, Hellenic Centre for Marine Research, 85131 Rhodes, Greece
Dimitris Mavrouleas: Hydrobiological Station of Rhodes, Hellenic Centre for Marine Research, 85131 Rhodes, Greece
Alexios Conides: Institute of Marine Biological Resources and Inland Waters, Hellenic Centre for Marine Research, 19013 Anavissos, Greece
Paraskevi K. Karachle: Institute of Marine Biological Resources and Inland Waters, Hellenic Centre for Marine Research, 19013 Anavissos, Greece
Maria Corsini-Foka: Hydrobiological Station of Rhodes, Hellenic Centre for Marine Research, 85131 Rhodes, Greece
Dimitris Klaoudatos: Department of Ichthyology and Aquatic Environment (DIAE), School of Agricultural Sciences, University of Thessaly (UTh), 38446 Volos, Greece

Sustainability, 2023, vol. 15, issue 20, 1-28

Abstract: Experimental fishing was conducted in three different locations along the coastal marine waters of eastern Rhodes Island, Levantine Sea, Hellas, from April 2021 to March 2022 on a monthly basis. Twelve samplings with gill nets and 12 with trammel nets at each of three selected locations resulted in a total of 72 samplings. The numbers of indigenous and non-indigenous species, as well as their abundances, biomasses and frequencies of occurrence, were recorded. Overall, the samplings yielded 71 species, of which 14 were non-indigenous. The total abundance was 1879 individuals, corresponding to a fish biomass of 433.57 kg. Fistularia commersonii , Sparisoma cretense and Pterois miles exhibited the highest numbers of individuals, whereas three of the invasive alien species in the Hellenic seas, namely, F. commersonii , Lagocephalus sceleratus and P. miles had the highest biomasses. The results exhibited a strong presence of P. miles in the Rhodian fisheries as the dominant invasive species based on the examined indicators (i.e., abundance, catches and frequency of occurrence). Comparisons in regard to the collected biomass between the locations, seasons, species origins and types of fishing gear were performed. All three locations were characterized by a good ecological status based on the relationship between abundance and biomass. The results of this study contribute valuable information on the ongoing changes in small-scale fisheries in the marine waters of Rhodes Island, which is one of the Eastern Mediterranean regions most affected by biological invasions.

Keywords: Levantine Sea; Mediterranean Sea; gill nets; trammel nets; non-indigenous species; invasive fish; small-scale coastal fisheries (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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