Spatial Distribution and Encounter Rates of Delphinids and Deep Diving Cetaceans in the Eastern Mediterranean Sea of Turkey and the Extent of Overlap With Areas of Dense Marine Traffic

Basit Öğe Kaydı
dc.authoridOzturk, Bayram/0000-0001-7844-2448
dc.contributor.authorAwbery, Tim
dc.contributor.authorAkkaya, Aylin
dc.contributor.authorLyne, Patrick
dc.contributor.authorRudd, Laura
dc.contributor.authorHoogenstrijd, Gemma
dc.contributor.authorNedelcu, Madeleine
dc.contributor.authorKniha, David
dc.date.accessioned2024-09-18T20:08:12Z
dc.date.available2024-09-18T20:08:12Z
dc.date.issued2022
dc.departmentHatay Mustafa Kemal Üniversitesien_US
dc.description.abstractMarine traffic has been identified as a serious threat to Mediterranean cetaceans with few mitigation strategies in place. With only limited research effort within the Eastern Basin, neither baseline species knowledge nor the magnitude of threats have been comprehensively assessed. Delineating the extent of overlap between marine traffic and cetaceans provides decision makers with important information to facilitate management. The current study employed the first seasonal boat surveys within the Eastern Mediterranean Sea of Turkey, incorporating visual and acoustic survey techniques between 2018 and 2020 to understand the spatial distribution of cetacean species. Additionally, marine traffic density data were retrieved to assess the overlap with marine traffic. Encounter rates of cetaceans and marine traffic density were recorded for each 100 km(2) cell within a grid. Subsequently, encounter and marine traffic density data were used to create a potential risk index to establish where the potential for marine traffic and cetacean overlap was high. Overall, eight surveys were undertaken with a survey coverage of 21,899 km(2) between the Rhodes and Antalya Basins. Deep diving cetaceans (sperm and beaked whales) were detected on 28 occasions, with 166 encounters of delphinids of which bottlenose, striped and common dolphins were visually confirmed. Spatially, delphinids were distributed throughout the survey area but encounter rates for both deep diving cetaceans and delphinids were highest between the Rhodes and Finike Basins. While sperm whales were generally detected around the 1000m contour, delphinids were encountered at varying depths. Overall, two years of monthly marine traffic density were retrieved with an average density of 0.37 hours of monthly vessel activity per square kilometer during the study period. The mean density of vessels was 0.32 and 1.03 hours of monthly vessel activity per square kilometer in non-coastal and coastal waters respectively. The Eastern Mediterranean Sea has several important shipping lanes within the study area. Two priority areas for deep diving cetacean and a large priority area for cetaceans were identified in the waters between Marmaris and Finike where high cetacean encounters and dense marine traffic overlapped. The current study revealed important habitats for cetaceans within the data deficient Eastern Mediterranean Sea and delineated potential risk area where marine traffic should be limited.en_US
dc.description.sponsorshipRufford Small Grant Foundation [27028-B]; MAVA Foundation [06/2019]; WWF-Turkey; Turkish Ministry of Environment and Climate Change; Turkish Marine Research Foundationen_US
dc.description.sponsorshipThis research was funded by the Rufford Small Grant Foundation (Grant 27028-B), the MAVA Foundation (Contract SPA/RAC No 06/2019) and WWF-Turkey. We are grateful to the Turkish Ministry of Environment and Climate Change and Turkish Marine Research Foundation for their financial support.en_US
dc.identifier.doi10.3389/fmars.2022.860242
dc.identifier.issn2296-7745
dc.identifier.scopus2-s2.0-85135225825en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.3389/fmars.2022.860242
dc.identifier.urihttps://hdl.handle.net/20.500.12483/8699
dc.identifier.volume9en_US
dc.identifier.wosWOS:000835172700001en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherFrontiers Media Saen_US
dc.relation.ispartofFrontiers in Marine Scienceen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectcetaceanen_US
dc.subjectspatial distributionen_US
dc.subjectsperm whaleen_US
dc.subjectbeaked whaleen_US
dc.subjectdelphinidsen_US
dc.subjectmarine trafficen_US
dc.subjectAISen_US
dc.titleSpatial Distribution and Encounter Rates of Delphinids and Deep Diving Cetaceans in the Eastern Mediterranean Sea of Turkey and the Extent of Overlap With Areas of Dense Marine Trafficen_US
dc.typeArticleen_US

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