Influence of hydroacoustic noise from vessel on echo integration estimations of fish stocks and catchability of accounting trawl (on example of walleye pollock in the Okhotsk Sea)
Previously, catchabilty of walleye pollock was estimated for the accounting trawl RT/TM 57/360 by results of acoustic measurements of fish density in the towed layer under fishing vessel. However, fish reaction to noise field ahead of vessel was not accounted in that experiment. Besides, distortion...
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Transactions of the Pacific Research Institute of Fisheries and Oceanography
2017
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ftdoajarticles:oai:doaj.org/article:d8c811e1e7d64947855e25a8246d5955 2023-10-09T21:55:00+02:00 Influence of hydroacoustic noise from vessel on echo integration estimations of fish stocks and catchability of accounting trawl (on example of walleye pollock in the Okhotsk Sea) Michail Yu. Kuznetsov Vladimir I. Poljanichko Igor A. Ubarchuk Eugeny V. Syrovatkin 2017-09-01T00:00:00Z https://doi.org/10.26428/1606-9919-2017-190-127 https://doaj.org/article/d8c811e1e7d64947855e25a8246d5955 RU rus Transactions of the Pacific Research Institute of Fisheries and Oceanography https://izvestiya.tinro-center.ru/jour/article/view/319 https://doaj.org/toc/1606-9919 https://doaj.org/toc/2658-5510 1606-9919 2658-5510 doi:10.26428/1606-9919-2017-190-127 https://doaj.org/article/d8c811e1e7d64947855e25a8246d5955 Известия ТИНРО, Vol 190, Iss 3, Pp 85-100 (2017) шум судна оценка запаса научный эхолот реакция избегания плотность скопления заглубление рассеяние дистанция реагирования модель поведения учетный трал коэффициент уловистости протраленный объем vessel noise fish stock estimation scientific echo sounder avoiding reaction density aggregation fish deepening fish dispersion reaction to noise distance behaviour model accounting trawl catchability coefficient towed volume of water Aquaculture. Fisheries. Angling SH1-691 article 2017 ftdoajarticles https://doi.org/10.26428/1606-9919-2017-190-127 2023-09-10T00:45:58Z Previously, catchabilty of walleye pollock was estimated for the accounting trawl RT/TM 57/360 by results of acoustic measurements of fish density in the towed layer under fishing vessel. However, fish reaction to noise field ahead of vessel was not accounted in that experiment. Besides, distortion of initial distribution of fish by the vessel noise could cause an error in fish stock estimations by methods of echo integration. Data of new experiment conducted for estimation of fish reaction to the vessel noise are presented using independent floating buoy equipped by scientific echo sounder. Distance of walleye pollock reaction to the vessel noise was estimated as 140-180 m that corresponds to the calculated value (150 m) used in modeling. Distortion of typical fish distribution was considerable: the fish density decreased in the upper layer and gradually increased in deeper layers as the fish moved down. The density decreasing in the layer 0-100 m was evaluated as 0.56, i.e. the echo integration method underestimated the fish density on more than 40 %, the decreasing in the layer 100-200 was less significant (0.86). Fish moved down under the noise effect in 10 times faster than at their daily vertical migration. The experimental data on walleye pollock density change under influence of passing fishing vessel are compared with the modeling results. Estimations of catchability coefficient for the accounting trawl РT/TM 57/360 are corrected taking into account the depth of trawling. The corrected coefficients of catchability for walleye pollock vary from 0.01 at the sea surface to 0.85 at the depth equal to the distance of its reaction to the noise. Article in Journal/Newspaper okhotsk sea Directory of Open Access Journals: DOAJ Articles Okhotsk |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
Russian |
topic |
шум судна оценка запаса научный эхолот реакция избегания плотность скопления заглубление рассеяние дистанция реагирования модель поведения учетный трал коэффициент уловистости протраленный объем vessel noise fish stock estimation scientific echo sounder avoiding reaction density aggregation fish deepening fish dispersion reaction to noise distance behaviour model accounting trawl catchability coefficient towed volume of water Aquaculture. Fisheries. Angling SH1-691 |
spellingShingle |
шум судна оценка запаса научный эхолот реакция избегания плотность скопления заглубление рассеяние дистанция реагирования модель поведения учетный трал коэффициент уловистости протраленный объем vessel noise fish stock estimation scientific echo sounder avoiding reaction density aggregation fish deepening fish dispersion reaction to noise distance behaviour model accounting trawl catchability coefficient towed volume of water Aquaculture. Fisheries. Angling SH1-691 Michail Yu. Kuznetsov Vladimir I. Poljanichko Igor A. Ubarchuk Eugeny V. Syrovatkin Influence of hydroacoustic noise from vessel on echo integration estimations of fish stocks and catchability of accounting trawl (on example of walleye pollock in the Okhotsk Sea) |
topic_facet |
шум судна оценка запаса научный эхолот реакция избегания плотность скопления заглубление рассеяние дистанция реагирования модель поведения учетный трал коэффициент уловистости протраленный объем vessel noise fish stock estimation scientific echo sounder avoiding reaction density aggregation fish deepening fish dispersion reaction to noise distance behaviour model accounting trawl catchability coefficient towed volume of water Aquaculture. Fisheries. Angling SH1-691 |
description |
Previously, catchabilty of walleye pollock was estimated for the accounting trawl RT/TM 57/360 by results of acoustic measurements of fish density in the towed layer under fishing vessel. However, fish reaction to noise field ahead of vessel was not accounted in that experiment. Besides, distortion of initial distribution of fish by the vessel noise could cause an error in fish stock estimations by methods of echo integration. Data of new experiment conducted for estimation of fish reaction to the vessel noise are presented using independent floating buoy equipped by scientific echo sounder. Distance of walleye pollock reaction to the vessel noise was estimated as 140-180 m that corresponds to the calculated value (150 m) used in modeling. Distortion of typical fish distribution was considerable: the fish density decreased in the upper layer and gradually increased in deeper layers as the fish moved down. The density decreasing in the layer 0-100 m was evaluated as 0.56, i.e. the echo integration method underestimated the fish density on more than 40 %, the decreasing in the layer 100-200 was less significant (0.86). Fish moved down under the noise effect in 10 times faster than at their daily vertical migration. The experimental data on walleye pollock density change under influence of passing fishing vessel are compared with the modeling results. Estimations of catchability coefficient for the accounting trawl РT/TM 57/360 are corrected taking into account the depth of trawling. The corrected coefficients of catchability for walleye pollock vary from 0.01 at the sea surface to 0.85 at the depth equal to the distance of its reaction to the noise. |
format |
Article in Journal/Newspaper |
author |
Michail Yu. Kuznetsov Vladimir I. Poljanichko Igor A. Ubarchuk Eugeny V. Syrovatkin |
author_facet |
Michail Yu. Kuznetsov Vladimir I. Poljanichko Igor A. Ubarchuk Eugeny V. Syrovatkin |
author_sort |
Michail Yu. Kuznetsov |
title |
Influence of hydroacoustic noise from vessel on echo integration estimations of fish stocks and catchability of accounting trawl (on example of walleye pollock in the Okhotsk Sea) |
title_short |
Influence of hydroacoustic noise from vessel on echo integration estimations of fish stocks and catchability of accounting trawl (on example of walleye pollock in the Okhotsk Sea) |
title_full |
Influence of hydroacoustic noise from vessel on echo integration estimations of fish stocks and catchability of accounting trawl (on example of walleye pollock in the Okhotsk Sea) |
title_fullStr |
Influence of hydroacoustic noise from vessel on echo integration estimations of fish stocks and catchability of accounting trawl (on example of walleye pollock in the Okhotsk Sea) |
title_full_unstemmed |
Influence of hydroacoustic noise from vessel on echo integration estimations of fish stocks and catchability of accounting trawl (on example of walleye pollock in the Okhotsk Sea) |
title_sort |
influence of hydroacoustic noise from vessel on echo integration estimations of fish stocks and catchability of accounting trawl (on example of walleye pollock in the okhotsk sea) |
publisher |
Transactions of the Pacific Research Institute of Fisheries and Oceanography |
publishDate |
2017 |
url |
https://doi.org/10.26428/1606-9919-2017-190-127 https://doaj.org/article/d8c811e1e7d64947855e25a8246d5955 |
geographic |
Okhotsk |
geographic_facet |
Okhotsk |
genre |
okhotsk sea |
genre_facet |
okhotsk sea |
op_source |
Известия ТИНРО, Vol 190, Iss 3, Pp 85-100 (2017) |
op_relation |
https://izvestiya.tinro-center.ru/jour/article/view/319 https://doaj.org/toc/1606-9919 https://doaj.org/toc/2658-5510 1606-9919 2658-5510 doi:10.26428/1606-9919-2017-190-127 https://doaj.org/article/d8c811e1e7d64947855e25a8246d5955 |
op_doi |
https://doi.org/10.26428/1606-9919-2017-190-127 |
_version_ |
1779318762837639168 |