Whale sightings, group sizes and krill biomass in West Greenland in 2005
This study combined data on fin whale Balaenoptera physalus, humpback whale Megaptera novaeangliae, minke whale B. acutorostrata, and sei whale B. borealis sightings from large-scale visual aerial and ship-based surveys (248 and 157 sightings, respectively) with synoptic acoustic sampling of krill M...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.814102 2024-09-15T17:57:22+00:00 Whale sightings, group sizes and krill biomass in West Greenland in 2005 Laidre, Kristin L Heide-Jørgensen, Mads Peter Heagerty, Patrick Cossio, Anthony Bergström, Bo Simon, M MEDIAN LATITUDE: 66.850000 * MEDIAN LONGITUDE: -51.300000 * SOUTH-BOUND LATITUDE: 59.700000 * WEST-BOUND LONGITUDE: -57.500000 * NORTH-BOUND LATITUDE: 74.000000 * EAST-BOUND LONGITUDE: -45.100000 * DATE/TIME START: 2005-08-28T00:00:00 * DATE/TIME END: 2005-09-02T00:00:00 2010 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.814102 https://doi.org/10.1594/PANGAEA.814102 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.814102 https://doi.org/10.1594/PANGAEA.814102 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Laidre, Kristin L; Heide-Jørgensen, Mads Peter; Heagerty, Patrick; Cossio, Anthony; Bergström, Bo; Simon, M (2010): Spatial associations between large baleen whales and their prey in West Greenland. Marine Ecology Progress Series, 402, 269-284, https://doi.org/10.3354/meps08423 Biological sample BIOS International Polar Year (2007-2008) IPY W_Greenland_whale West Greenland dataset publication series 2010 ftpangaea https://doi.org/10.1594/PANGAEA.81410210.3354/meps08423 2024-07-24T02:31:21Z This study combined data on fin whale Balaenoptera physalus, humpback whale Megaptera novaeangliae, minke whale B. acutorostrata, and sei whale B. borealis sightings from large-scale visual aerial and ship-based surveys (248 and 157 sightings, respectively) with synoptic acoustic sampling of krill Meganyctiphanes norvegica and Thysanoessa sp. abundance in September 2005 in West Greenland to examine the relationships between whales and their prey. Krill densities were obtained by converting relationships of volume backscattering strengths at multiple frequencies to a numerical density using an estimate of krill target strength. Krill data were vertically integrated in 25 m depth bins between 0 and 300 m to obtain water column biomass (g/m**2) and translated to density surfaces using ordinary kriging. Standard regression models (Generalized Additive Modeling, GAM, and Generalized Linear Modeling, GLM) were developed to identify important explanatory variables relating the presence, absence, and density of large whales to the physical and biological environment and different survey platforms. Large baleen whales were concentrated in 3 focal areas: (1) the northern edge of Lille Hellefiske bank between 65 and 67°N, (2) north of Paamiut at 63°N, and (3) in South Greenland between 60 and 61° N. There was a bimodal pattern of mean krill density between depths, with one peak between 50 and 75 m (mean 0.75 g/m**2, SD 2.74) and another between 225 and 275 m (mean 1.2 to 1.3 g/m**2, SD 23 to 19). Water column krill biomass was 3 times higher in South Greenland than at any other site along the coast. Total depth-integrated krill biomass was 1.3 x 10**9 (CV 0.11). Models indicated the most important parameter in predicting large baleen whale presence was integrated krill abundance, although this relationship was only significant for sightings obtained on the ship survey. This suggests that a high degree of spatio-temporal synchrony in observations is necessary for quantifying predator-prey relationships. Krill biomass was ... Other/Unknown Material Balaenoptera physalus baleen whale baleen whales Fin whale Greenland Humpback Whale International Polar Year IPY Meganyctiphanes norvegica Megaptera novaeangliae minke whale Paamiut Sei Whale PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-57.500000,-45.100000,74.000000,59.700000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Biological sample BIOS International Polar Year (2007-2008) IPY W_Greenland_whale West Greenland |
spellingShingle |
Biological sample BIOS International Polar Year (2007-2008) IPY W_Greenland_whale West Greenland Laidre, Kristin L Heide-Jørgensen, Mads Peter Heagerty, Patrick Cossio, Anthony Bergström, Bo Simon, M Whale sightings, group sizes and krill biomass in West Greenland in 2005 |
topic_facet |
Biological sample BIOS International Polar Year (2007-2008) IPY W_Greenland_whale West Greenland |
description |
This study combined data on fin whale Balaenoptera physalus, humpback whale Megaptera novaeangliae, minke whale B. acutorostrata, and sei whale B. borealis sightings from large-scale visual aerial and ship-based surveys (248 and 157 sightings, respectively) with synoptic acoustic sampling of krill Meganyctiphanes norvegica and Thysanoessa sp. abundance in September 2005 in West Greenland to examine the relationships between whales and their prey. Krill densities were obtained by converting relationships of volume backscattering strengths at multiple frequencies to a numerical density using an estimate of krill target strength. Krill data were vertically integrated in 25 m depth bins between 0 and 300 m to obtain water column biomass (g/m**2) and translated to density surfaces using ordinary kriging. Standard regression models (Generalized Additive Modeling, GAM, and Generalized Linear Modeling, GLM) were developed to identify important explanatory variables relating the presence, absence, and density of large whales to the physical and biological environment and different survey platforms. Large baleen whales were concentrated in 3 focal areas: (1) the northern edge of Lille Hellefiske bank between 65 and 67°N, (2) north of Paamiut at 63°N, and (3) in South Greenland between 60 and 61° N. There was a bimodal pattern of mean krill density between depths, with one peak between 50 and 75 m (mean 0.75 g/m**2, SD 2.74) and another between 225 and 275 m (mean 1.2 to 1.3 g/m**2, SD 23 to 19). Water column krill biomass was 3 times higher in South Greenland than at any other site along the coast. Total depth-integrated krill biomass was 1.3 x 10**9 (CV 0.11). Models indicated the most important parameter in predicting large baleen whale presence was integrated krill abundance, although this relationship was only significant for sightings obtained on the ship survey. This suggests that a high degree of spatio-temporal synchrony in observations is necessary for quantifying predator-prey relationships. Krill biomass was ... |
format |
Other/Unknown Material |
author |
Laidre, Kristin L Heide-Jørgensen, Mads Peter Heagerty, Patrick Cossio, Anthony Bergström, Bo Simon, M |
author_facet |
Laidre, Kristin L Heide-Jørgensen, Mads Peter Heagerty, Patrick Cossio, Anthony Bergström, Bo Simon, M |
author_sort |
Laidre, Kristin L |
title |
Whale sightings, group sizes and krill biomass in West Greenland in 2005 |
title_short |
Whale sightings, group sizes and krill biomass in West Greenland in 2005 |
title_full |
Whale sightings, group sizes and krill biomass in West Greenland in 2005 |
title_fullStr |
Whale sightings, group sizes and krill biomass in West Greenland in 2005 |
title_full_unstemmed |
Whale sightings, group sizes and krill biomass in West Greenland in 2005 |
title_sort |
whale sightings, group sizes and krill biomass in west greenland in 2005 |
publisher |
PANGAEA |
publishDate |
2010 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.814102 https://doi.org/10.1594/PANGAEA.814102 |
op_coverage |
MEDIAN LATITUDE: 66.850000 * MEDIAN LONGITUDE: -51.300000 * SOUTH-BOUND LATITUDE: 59.700000 * WEST-BOUND LONGITUDE: -57.500000 * NORTH-BOUND LATITUDE: 74.000000 * EAST-BOUND LONGITUDE: -45.100000 * DATE/TIME START: 2005-08-28T00:00:00 * DATE/TIME END: 2005-09-02T00:00:00 |
long_lat |
ENVELOPE(-57.500000,-45.100000,74.000000,59.700000) |
genre |
Balaenoptera physalus baleen whale baleen whales Fin whale Greenland Humpback Whale International Polar Year IPY Meganyctiphanes norvegica Megaptera novaeangliae minke whale Paamiut Sei Whale |
genre_facet |
Balaenoptera physalus baleen whale baleen whales Fin whale Greenland Humpback Whale International Polar Year IPY Meganyctiphanes norvegica Megaptera novaeangliae minke whale Paamiut Sei Whale |
op_source |
Supplement to: Laidre, Kristin L; Heide-Jørgensen, Mads Peter; Heagerty, Patrick; Cossio, Anthony; Bergström, Bo; Simon, M (2010): Spatial associations between large baleen whales and their prey in West Greenland. Marine Ecology Progress Series, 402, 269-284, https://doi.org/10.3354/meps08423 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.814102 https://doi.org/10.1594/PANGAEA.814102 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.81410210.3354/meps08423 |
_version_ |
1810433520113287168 |