Long-term passive acoustic monitoring revealed seasonal and diel patterns of cetacean presence in the Istanbul Strait
The Istanbul Strait (Bosphorus) is a part of the Turkish Straits System, connecting the Aegean Sea and the Black Sea. There are three cetacean species in the Strait, namely the harbour porpoise (Phocoena phocoena), the common dolphin (Delphinus delphis), and the bottlenose dolphin (Tursiops truncatu...
Published in: | Journal of the Marine Biological Association of the United Kingdom |
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Online Access: | https://hdl.handle.net/20.500.12627/29187 https://doi.org/10.1017/s0025315413000568 |
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ftistanbuluniv:oai:http://acikerisim.istanbul.edu.tr:20.500.12627/29187 2023-05-15T16:33:28+02:00 Long-term passive acoustic monitoring revealed seasonal and diel patterns of cetacean presence in the Istanbul Strait Akamatsu, Tomonari Tonay, Arda M. Ozturk, Bayram Dede, Ayhan Ozturk, Ayaka Amaha İstanbul Üniversitesi , , 27437 2014 https://hdl.handle.net/20.500.12627/29187 https://doi.org/10.1017/s0025315413000568 eng eng JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM Dede A., Ozturk A. A. , Akamatsu T., Tonay A. M. , Ozturk B., "Long-term passive acoustic monitoring revealed seasonal and diel patterns of cetacean presence in the Istanbul Strait", JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM, cilt.94, sa.6, ss.1195-1202, 2014 0025-3154 vv_1032021 av_241f93eb-9376-45be-8d7e-860fd2fed9af http://hdl.handle.net/20.500.12627/29187 https://doi.org/10.1017/s0025315413000568 94 6 1195 1202 Toprak ve Su Muhafazası ve Amenajmanı Su Hasadı Toprak ve Bitki Besleme Ziraat Tarımsal Bilimler Tarım ve Çevre Bilimleri (AGE) Bitki ve Hayvan Bilimleri DENİZ VE TATLISU BİYOLOJİSİ Makale 2014 ftistanbuluniv https://doi.org/20.500.12627/29187 https://doi.org/10.1017/s0025315413000568 2022-08-10T13:28:37Z The Istanbul Strait (Bosphorus) is a part of the Turkish Straits System, connecting the Aegean Sea and the Black Sea. There are three cetacean species in the Strait, namely the harbour porpoise (Phocoena phocoena), the common dolphin (Delphinus delphis), and the bottlenose dolphin (Tursiops truncatus). To monitor the presence of the cetaceans, a fixed stereo passive acoustic monitoring system (A-tag) was deployed in the middle of the Strait from July 2009 to September 2010. In total 26,814 click trains were detected. Presence, direction and inter-click intervals of phonating cetaceans were measured. Most click trains were detected during the night time. Diel presence pattern was prominent in March and April. In spring, the cetaceans were concentrated in one specific direction from the fixed monitoring system. In contrast, they were found in all directions for the rest of the year. Short range sonar (inter-click intervals (ICIs) less than 50 ms) was commonly detected in spring. During the rest of the year ICIs could reach up to 150 ms. All these findings suggest that they were feeding or socializing in spring and mostly travelling in the other seasons. It is well known that pelagic fish such as sprat and bluefish start their migration from the Aegean Sea to the Black Sea in spring. This study suggests that the cetaceans use the middle part of the Strait for feeding on the pelagic fish in spring when the fish migration has just started. Article in Journal/Newspaper Harbour porpoise Phocoena phocoena İstanbul Üniversitesi Açık Erişim Sistemi Journal of the Marine Biological Association of the United Kingdom 94 6 1195 1202 |
institution |
Open Polar |
collection |
İstanbul Üniversitesi Açık Erişim Sistemi |
op_collection_id |
ftistanbuluniv |
language |
English |
topic |
Toprak ve Su Muhafazası ve Amenajmanı Su Hasadı Toprak ve Bitki Besleme Ziraat Tarımsal Bilimler Tarım ve Çevre Bilimleri (AGE) Bitki ve Hayvan Bilimleri DENİZ VE TATLISU BİYOLOJİSİ |
spellingShingle |
Toprak ve Su Muhafazası ve Amenajmanı Su Hasadı Toprak ve Bitki Besleme Ziraat Tarımsal Bilimler Tarım ve Çevre Bilimleri (AGE) Bitki ve Hayvan Bilimleri DENİZ VE TATLISU BİYOLOJİSİ Akamatsu, Tomonari Tonay, Arda M. Ozturk, Bayram Dede, Ayhan Ozturk, Ayaka Amaha Long-term passive acoustic monitoring revealed seasonal and diel patterns of cetacean presence in the Istanbul Strait |
topic_facet |
Toprak ve Su Muhafazası ve Amenajmanı Su Hasadı Toprak ve Bitki Besleme Ziraat Tarımsal Bilimler Tarım ve Çevre Bilimleri (AGE) Bitki ve Hayvan Bilimleri DENİZ VE TATLISU BİYOLOJİSİ |
description |
The Istanbul Strait (Bosphorus) is a part of the Turkish Straits System, connecting the Aegean Sea and the Black Sea. There are three cetacean species in the Strait, namely the harbour porpoise (Phocoena phocoena), the common dolphin (Delphinus delphis), and the bottlenose dolphin (Tursiops truncatus). To monitor the presence of the cetaceans, a fixed stereo passive acoustic monitoring system (A-tag) was deployed in the middle of the Strait from July 2009 to September 2010. In total 26,814 click trains were detected. Presence, direction and inter-click intervals of phonating cetaceans were measured. Most click trains were detected during the night time. Diel presence pattern was prominent in March and April. In spring, the cetaceans were concentrated in one specific direction from the fixed monitoring system. In contrast, they were found in all directions for the rest of the year. Short range sonar (inter-click intervals (ICIs) less than 50 ms) was commonly detected in spring. During the rest of the year ICIs could reach up to 150 ms. All these findings suggest that they were feeding or socializing in spring and mostly travelling in the other seasons. It is well known that pelagic fish such as sprat and bluefish start their migration from the Aegean Sea to the Black Sea in spring. This study suggests that the cetaceans use the middle part of the Strait for feeding on the pelagic fish in spring when the fish migration has just started. |
author2 |
İstanbul Üniversitesi , , 27437 |
format |
Article in Journal/Newspaper |
author |
Akamatsu, Tomonari Tonay, Arda M. Ozturk, Bayram Dede, Ayhan Ozturk, Ayaka Amaha |
author_facet |
Akamatsu, Tomonari Tonay, Arda M. Ozturk, Bayram Dede, Ayhan Ozturk, Ayaka Amaha |
author_sort |
Akamatsu, Tomonari |
title |
Long-term passive acoustic monitoring revealed seasonal and diel patterns of cetacean presence in the Istanbul Strait |
title_short |
Long-term passive acoustic monitoring revealed seasonal and diel patterns of cetacean presence in the Istanbul Strait |
title_full |
Long-term passive acoustic monitoring revealed seasonal and diel patterns of cetacean presence in the Istanbul Strait |
title_fullStr |
Long-term passive acoustic monitoring revealed seasonal and diel patterns of cetacean presence in the Istanbul Strait |
title_full_unstemmed |
Long-term passive acoustic monitoring revealed seasonal and diel patterns of cetacean presence in the Istanbul Strait |
title_sort |
long-term passive acoustic monitoring revealed seasonal and diel patterns of cetacean presence in the istanbul strait |
publishDate |
2014 |
url |
https://hdl.handle.net/20.500.12627/29187 https://doi.org/10.1017/s0025315413000568 |
genre |
Harbour porpoise Phocoena phocoena |
genre_facet |
Harbour porpoise Phocoena phocoena |
op_relation |
JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM Dede A., Ozturk A. A. , Akamatsu T., Tonay A. M. , Ozturk B., "Long-term passive acoustic monitoring revealed seasonal and diel patterns of cetacean presence in the Istanbul Strait", JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM, cilt.94, sa.6, ss.1195-1202, 2014 0025-3154 vv_1032021 av_241f93eb-9376-45be-8d7e-860fd2fed9af http://hdl.handle.net/20.500.12627/29187 https://doi.org/10.1017/s0025315413000568 94 6 1195 1202 |
op_doi |
https://doi.org/20.500.12627/29187 https://doi.org/10.1017/s0025315413000568 |
container_title |
Journal of the Marine Biological Association of the United Kingdom |
container_volume |
94 |
container_issue |
6 |
container_start_page |
1195 |
op_container_end_page |
1202 |
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1766023151541551104 |