Combining data from different sampling methods to study the development of an alien crab Chionoecetes opilio invasion in the remote and pristine Arctic Kara Sea
Data obtained using three different types of sampling gear is compared and combined to assess the size composition and density of a non-indigenous snow crab population Chionoecetes opilio in the previously free of alien species Kara Sea benthos. The Sigsbee trawl has small mesh and catches even rece...
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ftdoajarticles:oai:doaj.org/article:5438455929114c2fb55c1ce11a9bdfd7 2024-01-07T09:42:03+01:00 Combining data from different sampling methods to study the development of an alien crab Chionoecetes opilio invasion in the remote and pristine Arctic Kara Sea Anna K. Zalota Olga L. Zimina Vassily A. Spiridonov 2019-11-01T00:00:00Z https://doi.org/10.7717/peerj.7952 https://doaj.org/article/5438455929114c2fb55c1ce11a9bdfd7 EN eng PeerJ Inc. https://peerj.com/articles/7952.pdf https://peerj.com/articles/7952/ https://doaj.org/toc/2167-8359 doi:10.7717/peerj.7952 2167-8359 https://doaj.org/article/5438455929114c2fb55c1ce11a9bdfd7 PeerJ, Vol 7, p e7952 (2019) Oregonidae Growth instars Size composition Novaya Zemlya Yamal Peninsula Sea Ice Regime Medicine R Biology (General) QH301-705.5 article 2019 ftdoajarticles https://doi.org/10.7717/peerj.7952 2023-12-10T01:52:21Z Data obtained using three different types of sampling gear is compared and combined to assess the size composition and density of a non-indigenous snow crab population Chionoecetes opilio in the previously free of alien species Kara Sea benthos. The Sigsbee trawl has small mesh and catches even recently settled crabs. The large bottom trawl is able to catch large crabs, but does not retain younger crabs, due to its large mesh. Video sampling allows the observation of larger crabs, although some smaller crabs can also be spotted. The combined use of such gear could provide full scope data of the existing size groups in a population. The density of the crabs was calculated from the video footage. The highest figures were in Blagopoluchiya Bay at 0.87 crabs/m2, where the settlement seems to be reaching its first peak of population growth after the introduction. High density in the Kara Gates Strait at 0.55 crabs/m2, could be due to the close proximity of the Barents Sea from where the crabs can enter by both larval dispersal and active adult migration. All size groups have been present in most sampled areas, which suggest successful settlement and growth of crabs over a number of years. Again, this was not the case in Blagopoluchiya Bay with high density of small crabs (<30 mm CW), which confirms its recent population growth. Male to female ratio was strikingly different between the bays of the Novaya Zemlya Archipelago and west of the Yamal Peninsula (0.8 and 3.8 respectively). Seventy five ovigerous females were caught in 2016, which confirms the presence of a reproducing population in the Kara Sea. The spatial structure of the snow crab population in the Kara Sea is still in the process of formation. The presented data indicates that this process may lead to a complex system, which is based on local recruitment and transport of larvae from the Barents Sea and across the western Kara shelf; formation of nursery grounds; active migration of adults and their concentration in the areas of the shelf with ... Article in Journal/Newspaper Arctic Barents Sea Chionoecetes opilio Kara Sea Novaya Zemlya Sea ice Snow crab Yamal Peninsula Directory of Open Access Journals: DOAJ Articles Arctic Barents Sea Kara Sea Yamal Peninsula ENVELOPE(69.873,69.873,70.816,70.816) PeerJ 7 e7952 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Oregonidae Growth instars Size composition Novaya Zemlya Yamal Peninsula Sea Ice Regime Medicine R Biology (General) QH301-705.5 |
spellingShingle |
Oregonidae Growth instars Size composition Novaya Zemlya Yamal Peninsula Sea Ice Regime Medicine R Biology (General) QH301-705.5 Anna K. Zalota Olga L. Zimina Vassily A. Spiridonov Combining data from different sampling methods to study the development of an alien crab Chionoecetes opilio invasion in the remote and pristine Arctic Kara Sea |
topic_facet |
Oregonidae Growth instars Size composition Novaya Zemlya Yamal Peninsula Sea Ice Regime Medicine R Biology (General) QH301-705.5 |
description |
Data obtained using three different types of sampling gear is compared and combined to assess the size composition and density of a non-indigenous snow crab population Chionoecetes opilio in the previously free of alien species Kara Sea benthos. The Sigsbee trawl has small mesh and catches even recently settled crabs. The large bottom trawl is able to catch large crabs, but does not retain younger crabs, due to its large mesh. Video sampling allows the observation of larger crabs, although some smaller crabs can also be spotted. The combined use of such gear could provide full scope data of the existing size groups in a population. The density of the crabs was calculated from the video footage. The highest figures were in Blagopoluchiya Bay at 0.87 crabs/m2, where the settlement seems to be reaching its first peak of population growth after the introduction. High density in the Kara Gates Strait at 0.55 crabs/m2, could be due to the close proximity of the Barents Sea from where the crabs can enter by both larval dispersal and active adult migration. All size groups have been present in most sampled areas, which suggest successful settlement and growth of crabs over a number of years. Again, this was not the case in Blagopoluchiya Bay with high density of small crabs (<30 mm CW), which confirms its recent population growth. Male to female ratio was strikingly different between the bays of the Novaya Zemlya Archipelago and west of the Yamal Peninsula (0.8 and 3.8 respectively). Seventy five ovigerous females were caught in 2016, which confirms the presence of a reproducing population in the Kara Sea. The spatial structure of the snow crab population in the Kara Sea is still in the process of formation. The presented data indicates that this process may lead to a complex system, which is based on local recruitment and transport of larvae from the Barents Sea and across the western Kara shelf; formation of nursery grounds; active migration of adults and their concentration in the areas of the shelf with ... |
format |
Article in Journal/Newspaper |
author |
Anna K. Zalota Olga L. Zimina Vassily A. Spiridonov |
author_facet |
Anna K. Zalota Olga L. Zimina Vassily A. Spiridonov |
author_sort |
Anna K. Zalota |
title |
Combining data from different sampling methods to study the development of an alien crab Chionoecetes opilio invasion in the remote and pristine Arctic Kara Sea |
title_short |
Combining data from different sampling methods to study the development of an alien crab Chionoecetes opilio invasion in the remote and pristine Arctic Kara Sea |
title_full |
Combining data from different sampling methods to study the development of an alien crab Chionoecetes opilio invasion in the remote and pristine Arctic Kara Sea |
title_fullStr |
Combining data from different sampling methods to study the development of an alien crab Chionoecetes opilio invasion in the remote and pristine Arctic Kara Sea |
title_full_unstemmed |
Combining data from different sampling methods to study the development of an alien crab Chionoecetes opilio invasion in the remote and pristine Arctic Kara Sea |
title_sort |
combining data from different sampling methods to study the development of an alien crab chionoecetes opilio invasion in the remote and pristine arctic kara sea |
publisher |
PeerJ Inc. |
publishDate |
2019 |
url |
https://doi.org/10.7717/peerj.7952 https://doaj.org/article/5438455929114c2fb55c1ce11a9bdfd7 |
long_lat |
ENVELOPE(69.873,69.873,70.816,70.816) |
geographic |
Arctic Barents Sea Kara Sea Yamal Peninsula |
geographic_facet |
Arctic Barents Sea Kara Sea Yamal Peninsula |
genre |
Arctic Barents Sea Chionoecetes opilio Kara Sea Novaya Zemlya Sea ice Snow crab Yamal Peninsula |
genre_facet |
Arctic Barents Sea Chionoecetes opilio Kara Sea Novaya Zemlya Sea ice Snow crab Yamal Peninsula |
op_source |
PeerJ, Vol 7, p e7952 (2019) |
op_relation |
https://peerj.com/articles/7952.pdf https://peerj.com/articles/7952/ https://doaj.org/toc/2167-8359 doi:10.7717/peerj.7952 2167-8359 https://doaj.org/article/5438455929114c2fb55c1ce11a9bdfd7 |
op_doi |
https://doi.org/10.7717/peerj.7952 |
container_title |
PeerJ |
container_volume |
7 |
container_start_page |
e7952 |
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1787422896908402688 |