Data_Sheet_2_Declining Pre-bloom Calanus finmarchicus Egg Production Adjacent to Two Major Overwintering Regions in the Northeastern Atlantic.docx
Calanus finmarchicus is a key secondary producer in the North Atlantic. Shortly prior to the spring bloom the animals ascend from diapause at depth to surface waters, where the females spawn partly, based on winter lipid reserves. C. finmarchicus eggs are an important prey of first feeding fish larv...
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Online Access: | https://doi.org/10.3389/fmars.2022.822978.s002 https://figshare.com/articles/dataset/Data_Sheet_2_Declining_Pre-bloom_Calanus_finmarchicus_Egg_Production_Adjacent_to_Two_Major_Overwintering_Regions_in_the_Northeastern_Atlantic_docx/19167539 |
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ftfrontimediafig:oai:figshare.com:article/19167539 2023-05-15T15:47:54+02:00 Data_Sheet_2_Declining Pre-bloom Calanus finmarchicus Egg Production Adjacent to Two Major Overwintering Regions in the Northeastern Atlantic.docx Sólvá Jacobsen Eilif Gaard Hjálmar Hátún 2022-02-14T04:43:21Z https://doi.org/10.3389/fmars.2022.822978.s002 https://figshare.com/articles/dataset/Data_Sheet_2_Declining_Pre-bloom_Calanus_finmarchicus_Egg_Production_Adjacent_to_Two_Major_Overwintering_Regions_in_the_Northeastern_Atlantic_docx/19167539 unknown doi:10.3389/fmars.2022.822978.s002 https://figshare.com/articles/dataset/Data_Sheet_2_Declining_Pre-bloom_Calanus_finmarchicus_Egg_Production_Adjacent_to_Two_Major_Overwintering_Regions_in_the_Northeastern_Atlantic_docx/19167539 CC BY 4.0 CC-BY Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering Calanus finmarchicus egg (production) temperature chlorophyll pre-bloom Faroe shelf Dataset 2022 ftfrontimediafig https://doi.org/10.3389/fmars.2022.822978.s002 2022-02-17T00:04:50Z Calanus finmarchicus is a key secondary producer in the North Atlantic. Shortly prior to the spring bloom the animals ascend from diapause at depth to surface waters, where the females spawn partly, based on winter lipid reserves. C. finmarchicus eggs are an important prey of first feeding fish larvae inhabiting North Atlantic shelves during early spring and are thus essential for larval survival. Comprehensive late April surveys have been carried out on and around the Faroe shelf, which is located between the Northeast Atlantic and the Nordic Seas, for more than two decades. One aim is to investigate the critical match-mismatch between the spring bloom development, zooplankton reproduction and occurrence of first feeding fish larvae. In this study, we examine spatial and temporal changes in pre-bloom reproductive activity of C. finmarchicus on and around the shelf using a unique dataset of more than 8,000 examined females sampled during the period 1997–2020. Enhanced productivity was observed on the north-western side of the shelf, where the main flow of oceanic water to the inner permanently well mixed shelf takes place. We attribute this increased productivity to enhanced food (phytoplankton) availability in the seasonally stratified outer shelf, slightly upstream of the main egg production area. Both individual egg production rates and the fraction of spawning females declined throughout the Faroe shelf during the examined period. This decline could not be explained by the employed environmental parameters. The declining pre-bloom egg production may have consequences for first feeding fish larvae. Dataset Calanus finmarchicus Nordic Seas North Atlantic Northeast Atlantic Frontiers: Figshare Faroe Shelf ENVELOPE(-6.000,-6.000,62.000,62.000) |
institution |
Open Polar |
collection |
Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering Calanus finmarchicus egg (production) temperature chlorophyll pre-bloom Faroe shelf |
spellingShingle |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering Calanus finmarchicus egg (production) temperature chlorophyll pre-bloom Faroe shelf Sólvá Jacobsen Eilif Gaard Hjálmar Hátún Data_Sheet_2_Declining Pre-bloom Calanus finmarchicus Egg Production Adjacent to Two Major Overwintering Regions in the Northeastern Atlantic.docx |
topic_facet |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering Calanus finmarchicus egg (production) temperature chlorophyll pre-bloom Faroe shelf |
description |
Calanus finmarchicus is a key secondary producer in the North Atlantic. Shortly prior to the spring bloom the animals ascend from diapause at depth to surface waters, where the females spawn partly, based on winter lipid reserves. C. finmarchicus eggs are an important prey of first feeding fish larvae inhabiting North Atlantic shelves during early spring and are thus essential for larval survival. Comprehensive late April surveys have been carried out on and around the Faroe shelf, which is located between the Northeast Atlantic and the Nordic Seas, for more than two decades. One aim is to investigate the critical match-mismatch between the spring bloom development, zooplankton reproduction and occurrence of first feeding fish larvae. In this study, we examine spatial and temporal changes in pre-bloom reproductive activity of C. finmarchicus on and around the shelf using a unique dataset of more than 8,000 examined females sampled during the period 1997–2020. Enhanced productivity was observed on the north-western side of the shelf, where the main flow of oceanic water to the inner permanently well mixed shelf takes place. We attribute this increased productivity to enhanced food (phytoplankton) availability in the seasonally stratified outer shelf, slightly upstream of the main egg production area. Both individual egg production rates and the fraction of spawning females declined throughout the Faroe shelf during the examined period. This decline could not be explained by the employed environmental parameters. The declining pre-bloom egg production may have consequences for first feeding fish larvae. |
format |
Dataset |
author |
Sólvá Jacobsen Eilif Gaard Hjálmar Hátún |
author_facet |
Sólvá Jacobsen Eilif Gaard Hjálmar Hátún |
author_sort |
Sólvá Jacobsen |
title |
Data_Sheet_2_Declining Pre-bloom Calanus finmarchicus Egg Production Adjacent to Two Major Overwintering Regions in the Northeastern Atlantic.docx |
title_short |
Data_Sheet_2_Declining Pre-bloom Calanus finmarchicus Egg Production Adjacent to Two Major Overwintering Regions in the Northeastern Atlantic.docx |
title_full |
Data_Sheet_2_Declining Pre-bloom Calanus finmarchicus Egg Production Adjacent to Two Major Overwintering Regions in the Northeastern Atlantic.docx |
title_fullStr |
Data_Sheet_2_Declining Pre-bloom Calanus finmarchicus Egg Production Adjacent to Two Major Overwintering Regions in the Northeastern Atlantic.docx |
title_full_unstemmed |
Data_Sheet_2_Declining Pre-bloom Calanus finmarchicus Egg Production Adjacent to Two Major Overwintering Regions in the Northeastern Atlantic.docx |
title_sort |
data_sheet_2_declining pre-bloom calanus finmarchicus egg production adjacent to two major overwintering regions in the northeastern atlantic.docx |
publishDate |
2022 |
url |
https://doi.org/10.3389/fmars.2022.822978.s002 https://figshare.com/articles/dataset/Data_Sheet_2_Declining_Pre-bloom_Calanus_finmarchicus_Egg_Production_Adjacent_to_Two_Major_Overwintering_Regions_in_the_Northeastern_Atlantic_docx/19167539 |
long_lat |
ENVELOPE(-6.000,-6.000,62.000,62.000) |
geographic |
Faroe Shelf |
geographic_facet |
Faroe Shelf |
genre |
Calanus finmarchicus Nordic Seas North Atlantic Northeast Atlantic |
genre_facet |
Calanus finmarchicus Nordic Seas North Atlantic Northeast Atlantic |
op_relation |
doi:10.3389/fmars.2022.822978.s002 https://figshare.com/articles/dataset/Data_Sheet_2_Declining_Pre-bloom_Calanus_finmarchicus_Egg_Production_Adjacent_to_Two_Major_Overwintering_Regions_in_the_Northeastern_Atlantic_docx/19167539 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmars.2022.822978.s002 |
_version_ |
1766382863959195648 |