Distribution, population dynamics and growth rates of Thysanopoda acutifrons , Thysanoessa inermis and Nematobrachion boöpis in the Irminger Sea, North Atlantic
Euphausiids are an important component of the northern North Atlantic ecosystem and several species are found in the Irminger Sea. However, data on euphausiids in this region are few, particularly for Thysanopoda acutifrons , Thysanoessa inermis and Nematobranchion boöpis . In this paper, we present...
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Online Access: | http://dx.doi.org/10.1017/s0025315412001385 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315412001385 |
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crcambridgeupr:10.1017/s0025315412001385 2024-03-03T08:44:01+00:00 Distribution, population dynamics and growth rates of Thysanopoda acutifrons , Thysanoessa inermis and Nematobrachion boöpis in the Irminger Sea, North Atlantic Saunders, R.A. Rasmussen, J. Tarling, G.A. Brierley, A.S. 2012 http://dx.doi.org/10.1017/s0025315412001385 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315412001385 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Journal of the Marine Biological Association of the United Kingdom volume 93, issue 5, page 1287-1301 ISSN 0025-3154 1469-7769 Aquatic Science journal-article 2012 crcambridgeupr https://doi.org/10.1017/s0025315412001385 2024-02-08T08:42:01Z Euphausiids are an important component of the northern North Atlantic ecosystem and several species are found in the Irminger Sea. However, data on euphausiids in this region are few, particularly for Thysanopoda acutifrons , Thysanoessa inermis and Nematobranchion boöpis . In this paper, we present the first data since the 1930s on the seasonal distribution and population dynamics of these species from net haul data collected in the Irminger Sea during winter, spring and summer 2001–2002. Thysanoessa inermis was the most numerically abundant (0.63–26.62 ind. 1000 m −3 ) of the three species in the region and comprised a biomass of 3.92–41.74 mg 1000 m −3 . The species was largely found in the upper regions of the water column (0–400 m) and was distributed in the more on-shelf/shelf-break regions around East Greenland and Iceland. Growth rates were around 0.03 mm d −1 for T. inermis and there was some evidence that either the timing of spawning was delayed, or larval development was prolonged in the region. Thysanopoda acutifrons was predominantly distributed below 400 m in more oceanic regions and had a low abundance (1.23–1.64 ind. 1000 m −3 ) throughout the Irminger Sea. However, the species comprised a relatively high proportion of biomass (19.39–31.33 mg 1000 m −3 ) due to its large body size. Our data showed that the species had low rates of growth (0.04 mm d −1 ) and development throughout the year, and that the reproductive season occurred during the overwintering period (November/December) once individuals had reached two years of age. Nematobranchion boöpis mainly occurred below 400 m at low abundance (0.06–0.18 ind.1000 m −3 ) levels throughout the region. The species was largely found where Atlantic waters prevailed in the Irminger Current and its growth rates were variable (0.02–0.06 mm d −1 ). Nematobranchion boöpis was a year-round spawner and the species had fairly rapid rates of post-larval development, with the newly spawned 0-group reaching sexual maturity within the first 6 months. Data ... Article in Journal/Newspaper East Greenland Greenland Iceland North Atlantic Thysanoessa inermis Cambridge University Press Greenland Irminger Sea ENVELOPE(-34.041,-34.041,63.054,63.054) Journal of the Marine Biological Association of the United Kingdom 93 5 1287 1301 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Aquatic Science |
spellingShingle |
Aquatic Science Saunders, R.A. Rasmussen, J. Tarling, G.A. Brierley, A.S. Distribution, population dynamics and growth rates of Thysanopoda acutifrons , Thysanoessa inermis and Nematobrachion boöpis in the Irminger Sea, North Atlantic |
topic_facet |
Aquatic Science |
description |
Euphausiids are an important component of the northern North Atlantic ecosystem and several species are found in the Irminger Sea. However, data on euphausiids in this region are few, particularly for Thysanopoda acutifrons , Thysanoessa inermis and Nematobranchion boöpis . In this paper, we present the first data since the 1930s on the seasonal distribution and population dynamics of these species from net haul data collected in the Irminger Sea during winter, spring and summer 2001–2002. Thysanoessa inermis was the most numerically abundant (0.63–26.62 ind. 1000 m −3 ) of the three species in the region and comprised a biomass of 3.92–41.74 mg 1000 m −3 . The species was largely found in the upper regions of the water column (0–400 m) and was distributed in the more on-shelf/shelf-break regions around East Greenland and Iceland. Growth rates were around 0.03 mm d −1 for T. inermis and there was some evidence that either the timing of spawning was delayed, or larval development was prolonged in the region. Thysanopoda acutifrons was predominantly distributed below 400 m in more oceanic regions and had a low abundance (1.23–1.64 ind. 1000 m −3 ) throughout the Irminger Sea. However, the species comprised a relatively high proportion of biomass (19.39–31.33 mg 1000 m −3 ) due to its large body size. Our data showed that the species had low rates of growth (0.04 mm d −1 ) and development throughout the year, and that the reproductive season occurred during the overwintering period (November/December) once individuals had reached two years of age. Nematobranchion boöpis mainly occurred below 400 m at low abundance (0.06–0.18 ind.1000 m −3 ) levels throughout the region. The species was largely found where Atlantic waters prevailed in the Irminger Current and its growth rates were variable (0.02–0.06 mm d −1 ). Nematobranchion boöpis was a year-round spawner and the species had fairly rapid rates of post-larval development, with the newly spawned 0-group reaching sexual maturity within the first 6 months. Data ... |
format |
Article in Journal/Newspaper |
author |
Saunders, R.A. Rasmussen, J. Tarling, G.A. Brierley, A.S. |
author_facet |
Saunders, R.A. Rasmussen, J. Tarling, G.A. Brierley, A.S. |
author_sort |
Saunders, R.A. |
title |
Distribution, population dynamics and growth rates of Thysanopoda acutifrons , Thysanoessa inermis and Nematobrachion boöpis in the Irminger Sea, North Atlantic |
title_short |
Distribution, population dynamics and growth rates of Thysanopoda acutifrons , Thysanoessa inermis and Nematobrachion boöpis in the Irminger Sea, North Atlantic |
title_full |
Distribution, population dynamics and growth rates of Thysanopoda acutifrons , Thysanoessa inermis and Nematobrachion boöpis in the Irminger Sea, North Atlantic |
title_fullStr |
Distribution, population dynamics and growth rates of Thysanopoda acutifrons , Thysanoessa inermis and Nematobrachion boöpis in the Irminger Sea, North Atlantic |
title_full_unstemmed |
Distribution, population dynamics and growth rates of Thysanopoda acutifrons , Thysanoessa inermis and Nematobrachion boöpis in the Irminger Sea, North Atlantic |
title_sort |
distribution, population dynamics and growth rates of thysanopoda acutifrons , thysanoessa inermis and nematobrachion boöpis in the irminger sea, north atlantic |
publisher |
Cambridge University Press (CUP) |
publishDate |
2012 |
url |
http://dx.doi.org/10.1017/s0025315412001385 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315412001385 |
long_lat |
ENVELOPE(-34.041,-34.041,63.054,63.054) |
geographic |
Greenland Irminger Sea |
geographic_facet |
Greenland Irminger Sea |
genre |
East Greenland Greenland Iceland North Atlantic Thysanoessa inermis |
genre_facet |
East Greenland Greenland Iceland North Atlantic Thysanoessa inermis |
op_source |
Journal of the Marine Biological Association of the United Kingdom volume 93, issue 5, page 1287-1301 ISSN 0025-3154 1469-7769 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0025315412001385 |
container_title |
Journal of the Marine Biological Association of the United Kingdom |
container_volume |
93 |
container_issue |
5 |
container_start_page |
1287 |
op_container_end_page |
1301 |
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1792499481798770688 |