Ecological Assessment of Fishery Communities in an Otter-Trawl-Restricted, Semi-Enclosed Gulf in Greece
A fishery-independent survey with a commercial bottom otter trawl was conducted in the Pagasitikos Gulf, a semi-enclosed, trawl-restricted gulf in Greece. The study aimed to ecologically assess the fishery communities that are experiencing a decline in fishery landings. Twelve hauls of 30 min durati...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-08-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/11/9/1668 |
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| author | Dimitris Klaoudatos Sofia Vardali Chrisoula Apostologamvrou Alexios Lolas Nikolaos Neofitou Alexios Conides Georgios A. Gkafas Joanne Sarantopoulou Dorothea Kolindrini Kyriakoula Roditi Athanasios Exadactylos Dimitris Vafidis |
| author_facet | Dimitris Klaoudatos Sofia Vardali Chrisoula Apostologamvrou Alexios Lolas Nikolaos Neofitou Alexios Conides Georgios A. Gkafas Joanne Sarantopoulou Dorothea Kolindrini Kyriakoula Roditi Athanasios Exadactylos Dimitris Vafidis |
| author_sort | Dimitris Klaoudatos |
| collection | DOAJ |
| description | A fishery-independent survey with a commercial bottom otter trawl was conducted in the Pagasitikos Gulf, a semi-enclosed, trawl-restricted gulf in Greece. The study aimed to ecologically assess the fishery communities that are experiencing a decline in fishery landings. Twelve hauls of 30 min duration each were conducted in the eastern, western, and central parts of the gulf at depths between 62 and 97 m. In total, 57 species were captured, with the highest species number recorded in the west (35 species), followed by the center (32 species) and east (29 species). The highest numerical abundance was recorded at the center, followed by the east and west, with an opposing trend exhibited for biomass; however, GLM detected no significant spatial differences (in area or depth) or interaction. Ecological indices exhibited significantly lower values in the west–east area comparison. Linear Discriminant Analysis, mMDS, and hierarchical clustering indicated the presence of two main groups (east and west), with PERMANOVA showing a significant difference in the demersal communities among the identified groups. The results indicated moderately disturbed demersal communities and an increasing level of disturbance from east to west. Considering the economic value of Pagasitikos to the local fishing community, additional fishery management measures are deemed necessary to protect the fishery resources and mitigate the potential risks of overexploitation. |
| first_indexed | 2024-03-10T22:35:10Z |
| format | Article |
| id | doaj.art-703ec4cd397446869b4a9df01200fdc3 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-10T22:35:10Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-703ec4cd397446869b4a9df01200fdc32023-11-19T11:25:43ZengMDPI AGJournal of Marine Science and Engineering2077-13122023-08-01119166810.3390/jmse11091668Ecological Assessment of Fishery Communities in an Otter-Trawl-Restricted, Semi-Enclosed Gulf in GreeceDimitris Klaoudatos0Sofia Vardali1Chrisoula Apostologamvrou2Alexios Lolas3Nikolaos Neofitou4Alexios Conides5Georgios A. Gkafas6Joanne Sarantopoulou7Dorothea Kolindrini8Kyriakoula Roditi9Athanasios Exadactylos10Dimitris Vafidis11Department of Ichthyology and Aquatic Environment, School of Agricultural Sciences, University of Thessaly, 38446 Volos, GreeceDepartment of Ichthyology and Aquatic Environment, School of Agricultural Sciences, University of Thessaly, 38446 Volos, GreeceDepartment of Ichthyology and Aquatic Environment, School of Agricultural Sciences, University of Thessaly, 38446 Volos, GreeceDepartment of Ichthyology and Aquatic Environment, School of Agricultural Sciences, University of Thessaly, 38446 Volos, GreeceDepartment of Ichthyology and Aquatic Environment, School of Agricultural Sciences, University of Thessaly, 38446 Volos, GreeceHellenic Centre for Marine Research, Institute of Marine Biological Resources & Inland Waters, 19013 Attika, GreeceDepartment of Ichthyology and Aquatic Environment, School of Agricultural Sciences, University of Thessaly, 38446 Volos, GreeceDepartment of Ichthyology and Aquatic Environment, School of Agricultural Sciences, University of Thessaly, 38446 Volos, GreeceRegional Government of Magnesia and Sporades Islands, El. Venizelou & Analipseos Str., 38001 Volos, GreeceDepartment of Ichthyology and Aquatic Environment, School of Agricultural Sciences, University of Thessaly, 38446 Volos, GreeceDepartment of Ichthyology and Aquatic Environment, School of Agricultural Sciences, University of Thessaly, 38446 Volos, GreeceDepartment of Ichthyology and Aquatic Environment, School of Agricultural Sciences, University of Thessaly, 38446 Volos, GreeceA fishery-independent survey with a commercial bottom otter trawl was conducted in the Pagasitikos Gulf, a semi-enclosed, trawl-restricted gulf in Greece. The study aimed to ecologically assess the fishery communities that are experiencing a decline in fishery landings. Twelve hauls of 30 min duration each were conducted in the eastern, western, and central parts of the gulf at depths between 62 and 97 m. In total, 57 species were captured, with the highest species number recorded in the west (35 species), followed by the center (32 species) and east (29 species). The highest numerical abundance was recorded at the center, followed by the east and west, with an opposing trend exhibited for biomass; however, GLM detected no significant spatial differences (in area or depth) or interaction. Ecological indices exhibited significantly lower values in the west–east area comparison. Linear Discriminant Analysis, mMDS, and hierarchical clustering indicated the presence of two main groups (east and west), with PERMANOVA showing a significant difference in the demersal communities among the identified groups. The results indicated moderately disturbed demersal communities and an increasing level of disturbance from east to west. Considering the economic value of Pagasitikos to the local fishing community, additional fishery management measures are deemed necessary to protect the fishery resources and mitigate the potential risks of overexploitation.https://www.mdpi.com/2077-1312/11/9/1668demersal communitiesbiodiversity indicesecological indicesmultivariate analysisPagasitikos GulfAegean Sea |
| spellingShingle | Dimitris Klaoudatos Sofia Vardali Chrisoula Apostologamvrou Alexios Lolas Nikolaos Neofitou Alexios Conides Georgios A. Gkafas Joanne Sarantopoulou Dorothea Kolindrini Kyriakoula Roditi Athanasios Exadactylos Dimitris Vafidis Ecological Assessment of Fishery Communities in an Otter-Trawl-Restricted, Semi-Enclosed Gulf in Greece Journal of Marine Science and Engineering demersal communities biodiversity indices ecological indices multivariate analysis Pagasitikos Gulf Aegean Sea |
| title | Ecological Assessment of Fishery Communities in an Otter-Trawl-Restricted, Semi-Enclosed Gulf in Greece |
| title_full | Ecological Assessment of Fishery Communities in an Otter-Trawl-Restricted, Semi-Enclosed Gulf in Greece |
| title_fullStr | Ecological Assessment of Fishery Communities in an Otter-Trawl-Restricted, Semi-Enclosed Gulf in Greece |
| title_full_unstemmed | Ecological Assessment of Fishery Communities in an Otter-Trawl-Restricted, Semi-Enclosed Gulf in Greece |
| title_short | Ecological Assessment of Fishery Communities in an Otter-Trawl-Restricted, Semi-Enclosed Gulf in Greece |
| title_sort | ecological assessment of fishery communities in an otter trawl restricted semi enclosed gulf in greece |
| topic | demersal communities biodiversity indices ecological indices multivariate analysis Pagasitikos Gulf Aegean Sea |
| url | https://www.mdpi.com/2077-1312/11/9/1668 |
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