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 tru...
Published in: | Journal of the Marine Biological Association of the United Kingdom |
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Language: | English |
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2013
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Online Access: | http://dx.doi.org/10.1017/s0025315413000568 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315413000568 |
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crcambridgeupr:10.1017/s0025315413000568 2024-09-09T19:43:50+00:00 Long-term passive acoustic monitoring revealed seasonal and diel patterns of cetacean presence in the Istanbul Strait Dede, Ayhan Öztürk, Ayaka Amaha Akamatsu, Tomonari Tonay, Arda M. Öztürk, Bayram 2013 http://dx.doi.org/10.1017/s0025315413000568 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315413000568 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Journal of the Marine Biological Association of the United Kingdom volume 94, issue 6, page 1195-1202 ISSN 0025-3154 1469-7769 journal-article 2013 crcambridgeupr https://doi.org/10.1017/s0025315413000568 2024-07-24T04:03:31Z 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 Cambridge University Press Journal of the Marine Biological Association of the United Kingdom 94 6 1195 1202 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
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. |
format |
Article in Journal/Newspaper |
author |
Dede, Ayhan Öztürk, Ayaka Amaha Akamatsu, Tomonari Tonay, Arda M. Öztürk, Bayram |
spellingShingle |
Dede, Ayhan Öztürk, Ayaka Amaha Akamatsu, Tomonari Tonay, Arda M. Öztürk, Bayram Long-term passive acoustic monitoring revealed seasonal and diel patterns of cetacean presence in the Istanbul Strait |
author_facet |
Dede, Ayhan Öztürk, Ayaka Amaha Akamatsu, Tomonari Tonay, Arda M. Öztürk, Bayram |
author_sort |
Dede, Ayhan |
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 |
publisher |
Cambridge University Press (CUP) |
publishDate |
2013 |
url |
http://dx.doi.org/10.1017/s0025315413000568 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315413000568 |
genre |
Harbour porpoise Phocoena phocoena |
genre_facet |
Harbour porpoise Phocoena phocoena |
op_source |
Journal of the Marine Biological Association of the United Kingdom volume 94, issue 6, page 1195-1202 ISSN 0025-3154 1469-7769 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
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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1809913514289004544 |