Qualitative and quantitative aspects of Sagitta elegans biology in the Okhotsk Sea
Data on abundance and biomass of mass arrowworm Sagitta elegans in the Okhotsk Sea are presented, by size classes, on the base of plankton surveys conducted by Pacific Fish. Res. Center (TINRO) in 1984–2017. S. elegans spawns throughout the year, with varying intensity by areas. The juveniles with t...
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Transactions of the Pacific Research Institute of Fisheries and Oceanography
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ftdoajarticles:oai:doaj.org/article:c1df479d83064aefaeace14c612e669d 2023-08-27T04:11:23+02:00 Qualitative and quantitative aspects of Sagitta elegans biology in the Okhotsk Sea A. F. Volkov 2018-09-01T00:00:00Z https://doi.org/10.26428/1606-9919-2018-194-113-129 https://doaj.org/article/c1df479d83064aefaeace14c612e669d RU rus Transactions of the Pacific Research Institute of Fisheries and Oceanography https://izvestiya.tinro-center.ru/jour/article/view/402 https://doaj.org/toc/1606-9919 https://doaj.org/toc/2658-5510 1606-9919 2658-5510 doi:10.26428/1606-9919-2018-194-113-129 https://doaj.org/article/c1df479d83064aefaeace14c612e669d Известия ТИНРО, Vol 194, Iss 3, Pp 113-129 (2018) охотское море sagitta elegans сагитты сезоны распределение нерест молодь копеподы Aquaculture. Fisheries. Angling SH1-691 article 2018 ftdoajarticles https://doi.org/10.26428/1606-9919-2018-194-113-129 2023-08-06T00:41:16Z Data on abundance and biomass of mass arrowworm Sagitta elegans in the Okhotsk Sea are presented, by size classes, on the base of plankton surveys conducted by Pacific Fish. Res. Center (TINRO) in 1984–2017. S. elegans spawns throughout the year, with varying intensity by areas. The juveniles with the length < 6 mm are observed in mass along the eastern boundary of the sea in winter and spring, and in its entire periphery in summer. The mean annual portions of the size classes by abundance/biomass are: < 6 mm — 13.9/0.3 %; 6–10 mm — 10.0/1.9 %; 10–15 mm — 8.1/3.3 %; and 15–25 mm – 58.0/70.0 %. In the epipelagic layer 0–200 m, the total number of S. elegans depends negatively on the bathymetry: its mean abundance/biomass decreases from 71 ind./m3 and 942 mg/m3 in the zone with depth 30–50 m to 8 ind./m3 and 159 mg/m3 in the deep-water zone; the decreasing is more prominent for small-sized classes, and is not observed for the class > 25 mm. However, no more than 20 % of the species biomass is presented in the epipelagic layer, but the main part is concentrated in the layer 200–1000 m. S. elegans consumes the prey with the size equal to width of its mouth, mostly copepodites on different stages of development — their size correspondence to the size classes of arrowworms is presented, as well as the mean annual spatial distribution of small-, medium-, and large-sized copepods. Generally, the prey for the arrowworms with length < 25 mm (eggs, nauplii, smalland medium-sized copepods) is more abundant on the shelves, whereas the prey for the biggest arrowworms (large-sized copepods with length up to 5 mm) are concentrated in the deep sea. Article in Journal/Newspaper okhotsk sea Copepods Directory of Open Access Journals: DOAJ Articles Okhotsk Pacific Izvestiya TINRO 194 113 129 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
Russian |
topic |
охотское море sagitta elegans сагитты сезоны распределение нерест молодь копеподы Aquaculture. Fisheries. Angling SH1-691 |
spellingShingle |
охотское море sagitta elegans сагитты сезоны распределение нерест молодь копеподы Aquaculture. Fisheries. Angling SH1-691 A. F. Volkov Qualitative and quantitative aspects of Sagitta elegans biology in the Okhotsk Sea |
topic_facet |
охотское море sagitta elegans сагитты сезоны распределение нерест молодь копеподы Aquaculture. Fisheries. Angling SH1-691 |
description |
Data on abundance and biomass of mass arrowworm Sagitta elegans in the Okhotsk Sea are presented, by size classes, on the base of plankton surveys conducted by Pacific Fish. Res. Center (TINRO) in 1984–2017. S. elegans spawns throughout the year, with varying intensity by areas. The juveniles with the length < 6 mm are observed in mass along the eastern boundary of the sea in winter and spring, and in its entire periphery in summer. The mean annual portions of the size classes by abundance/biomass are: < 6 mm — 13.9/0.3 %; 6–10 mm — 10.0/1.9 %; 10–15 mm — 8.1/3.3 %; and 15–25 mm – 58.0/70.0 %. In the epipelagic layer 0–200 m, the total number of S. elegans depends negatively on the bathymetry: its mean abundance/biomass decreases from 71 ind./m3 and 942 mg/m3 in the zone with depth 30–50 m to 8 ind./m3 and 159 mg/m3 in the deep-water zone; the decreasing is more prominent for small-sized classes, and is not observed for the class > 25 mm. However, no more than 20 % of the species biomass is presented in the epipelagic layer, but the main part is concentrated in the layer 200–1000 m. S. elegans consumes the prey with the size equal to width of its mouth, mostly copepodites on different stages of development — their size correspondence to the size classes of arrowworms is presented, as well as the mean annual spatial distribution of small-, medium-, and large-sized copepods. Generally, the prey for the arrowworms with length < 25 mm (eggs, nauplii, smalland medium-sized copepods) is more abundant on the shelves, whereas the prey for the biggest arrowworms (large-sized copepods with length up to 5 mm) are concentrated in the deep sea. |
format |
Article in Journal/Newspaper |
author |
A. F. Volkov |
author_facet |
A. F. Volkov |
author_sort |
A. F. Volkov |
title |
Qualitative and quantitative aspects of Sagitta elegans biology in the Okhotsk Sea |
title_short |
Qualitative and quantitative aspects of Sagitta elegans biology in the Okhotsk Sea |
title_full |
Qualitative and quantitative aspects of Sagitta elegans biology in the Okhotsk Sea |
title_fullStr |
Qualitative and quantitative aspects of Sagitta elegans biology in the Okhotsk Sea |
title_full_unstemmed |
Qualitative and quantitative aspects of Sagitta elegans biology in the Okhotsk Sea |
title_sort |
qualitative and quantitative aspects of sagitta elegans biology in the okhotsk sea |
publisher |
Transactions of the Pacific Research Institute of Fisheries and Oceanography |
publishDate |
2018 |
url |
https://doi.org/10.26428/1606-9919-2018-194-113-129 https://doaj.org/article/c1df479d83064aefaeace14c612e669d |
geographic |
Okhotsk Pacific |
geographic_facet |
Okhotsk Pacific |
genre |
okhotsk sea Copepods |
genre_facet |
okhotsk sea Copepods |
op_source |
Известия ТИНРО, Vol 194, Iss 3, Pp 113-129 (2018) |
op_relation |
https://izvestiya.tinro-center.ru/jour/article/view/402 https://doaj.org/toc/1606-9919 https://doaj.org/toc/2658-5510 1606-9919 2658-5510 doi:10.26428/1606-9919-2018-194-113-129 https://doaj.org/article/c1df479d83064aefaeace14c612e669d |
op_doi |
https://doi.org/10.26428/1606-9919-2018-194-113-129 |
container_title |
Izvestiya TINRO |
container_volume |
194 |
container_start_page |
113 |
op_container_end_page |
129 |
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1775354115065380864 |