Investigation of the ability of gray seals to differentiate composite audio signals
Technogenic noise pollution of the seas and oceans has a significant impact on the physiology and behavior of marine mammals. The ability of gray seals to memorize and differentiate complex acoustic signals with similar amplitude-frequency characteristics has been analyzed while studying this impact...
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| Format: | Article |
| Language: | Russian |
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Murmansk State Technical University
2019-06-01
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| Series: | Vestnik MGTU |
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| Online Access: | http://vestnik.mstu.edu.ru/show.shtml?art=2013 |
| _version_ | 1818753751335305216 |
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| author | Y. V. Litvinov M. V. Pakhomov |
| author_facet | Y. V. Litvinov M. V. Pakhomov |
| author_sort | Y. V. Litvinov |
| collection | DOAJ |
| description | Technogenic noise pollution of the seas and oceans has a significant impact on the physiology and behavior of marine mammals. The ability of gray seals to memorize and differentiate complex acoustic signals with similar amplitude-frequency characteristics has been analyzed while studying this impact. The experiment consisted of three stages. At the first stage, the seals were trained to press the pedal only when a certain sound signal was given. At the second stage, the second sound signal was added, in frequency characteristics significantly different from the reinforced signal. At the third stage, the third sound signal was added close in frequency characteristics to the supported one. At each stage, 12 experiments were conducted, the number of stimulus presentations was not limited, the experiment was considered complete when the seal made 20 correct choices. The sound stimuli used were sound recordings of diesel engines at idle. The experiment was conducted in the MMBI aquacomplex located
in the Kola Bay (the town of Polyarny). The experimental animals were 4 species of the gray seal (Halichoerus grypus Fabricius, 1791) of different ages: seals No. 1 and No. 2 – 12-year-old females, seal No. 3 – 2-year-old female, seal No. 4 – 2-year old male. During the experiment, it has been shown that the reproduced sound of a diesel engine at a sound pressure level of 60–70 dB is a perceived sound stimulus for gray seals. At the first demonstration of a sound stimulus in seals, behavior characteristic of the reaction to avoid a new unknown stimulus has been noted, and no further reaction has been observed in the experimental seals. Later on, the seals have managed to develop a stable differentiating conditioned reflex to a given sound stimulus, which all the investigated seals have reliably distinguished from similar stimuli. It has been found that the time of onset of the response to an external stimulus presented is of an individual character in gray seals. |
| first_indexed | 2024-12-18T05:12:20Z |
| format | Article |
| id | doaj.art-0d037bc542374f008efd7488a1bc59cd |
| institution | Directory Open Access Journal |
| issn | 1560-9278 1997-4736 |
| language | Russian |
| last_indexed | 2024-12-18T05:12:20Z |
| publishDate | 2019-06-01 |
| publisher | Murmansk State Technical University |
| record_format | Article |
| series | Vestnik MGTU |
| spelling | doaj.art-0d037bc542374f008efd7488a1bc59cd2022-12-21T21:19:52ZrusMurmansk State Technical UniversityVestnik MGTU1560-92781997-47362019-06-0122224925710.21443/1560-9278-2019-22-2-249-257Investigation of the ability of gray seals to differentiate composite audio signalsY. V. Litvinov 0M. V. Pakhomov 1Murmansk Marine Biological Institute KSC RASMurmansk Marine Biological Institute KSC RASTechnogenic noise pollution of the seas and oceans has a significant impact on the physiology and behavior of marine mammals. The ability of gray seals to memorize and differentiate complex acoustic signals with similar amplitude-frequency characteristics has been analyzed while studying this impact. The experiment consisted of three stages. At the first stage, the seals were trained to press the pedal only when a certain sound signal was given. At the second stage, the second sound signal was added, in frequency characteristics significantly different from the reinforced signal. At the third stage, the third sound signal was added close in frequency characteristics to the supported one. At each stage, 12 experiments were conducted, the number of stimulus presentations was not limited, the experiment was considered complete when the seal made 20 correct choices. The sound stimuli used were sound recordings of diesel engines at idle. The experiment was conducted in the MMBI aquacomplex located in the Kola Bay (the town of Polyarny). The experimental animals were 4 species of the gray seal (Halichoerus grypus Fabricius, 1791) of different ages: seals No. 1 and No. 2 – 12-year-old females, seal No. 3 – 2-year-old female, seal No. 4 – 2-year old male. During the experiment, it has been shown that the reproduced sound of a diesel engine at a sound pressure level of 60–70 dB is a perceived sound stimulus for gray seals. At the first demonstration of a sound stimulus in seals, behavior characteristic of the reaction to avoid a new unknown stimulus has been noted, and no further reaction has been observed in the experimental seals. Later on, the seals have managed to develop a stable differentiating conditioned reflex to a given sound stimulus, which all the investigated seals have reliably distinguished from similar stimuli. It has been found that the time of onset of the response to an external stimulus presented is of an individual character in gray seals.http://vestnik.mstu.edu.ru/show.shtml?art=2013gray sealacoustic noisesound stimulusсерый тюленьакустический шумзвуковой стимул |
| spellingShingle | Y. V. Litvinov M. V. Pakhomov Investigation of the ability of gray seals to differentiate composite audio signals Vestnik MGTU gray seal acoustic noise sound stimulus серый тюлень акустический шум звуковой стимул |
| title | Investigation of the ability of gray seals to differentiate composite audio signals |
| title_full | Investigation of the ability of gray seals to differentiate composite audio signals |
| title_fullStr | Investigation of the ability of gray seals to differentiate composite audio signals |
| title_full_unstemmed | Investigation of the ability of gray seals to differentiate composite audio signals |
| title_short | Investigation of the ability of gray seals to differentiate composite audio signals |
| title_sort | investigation of the ability of gray seals to differentiate composite audio signals |
| topic | gray seal acoustic noise sound stimulus серый тюлень акустический шум звуковой стимул |
| url | http://vestnik.mstu.edu.ru/show.shtml?art=2013 |
| work_keys_str_mv | AT yvlitvinov investigationoftheabilityofgraysealstodifferentiatecompositeaudiosignals AT mvpakhomov investigationoftheabilityofgraysealstodifferentiatecompositeaudiosignals |