Associations between North Pacific right whales and their zooplanktonic prey in the southeastern Bering Sea
Author Posting. © Inter-Research, 2013. This article is posted here by permission of Inter-Research for personal use, not for redistribution. The definitive version was published in Marine Ecology Progress Series 490 (2013): 267-284, doi:10.3354/meps10457. Due to the seriously endangered status of N...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/6276 2023-05-15T15:37:00+02:00 Associations between North Pacific right whales and their zooplanktonic prey in the southeastern Bering Sea Baumgartner, Mark F. Lysiak, Nadine S. J. Esch, H. Carter Zerbini, Alexandre N. Berchok, Catherine L. Clapham, Phillip J. 2013-09-17 application/pdf https://hdl.handle.net/1912/6276 en_US eng Inter-Research https://doi.org/10.3354/meps10457 Marine Ecology Progress Series 490 (2013): 267-284 https://hdl.handle.net/1912/6276 doi:10.3354/meps10457 Marine Ecology Progress Series 490 (2013): 267-284 doi:10.3354/meps10457 Eubalaena japonica Right whale Calanus marshallae Calanus glacialis Bering Sea Baleen whale Resuspension Phytodetritus Article 2013 ftwhoas https://doi.org/10.3354/meps10457 2022-05-28T22:58:58Z Author Posting. © Inter-Research, 2013. This article is posted here by permission of Inter-Research for personal use, not for redistribution. The definitive version was published in Marine Ecology Progress Series 490 (2013): 267-284, doi:10.3354/meps10457. Due to the seriously endangered status of North Pacific right whales Eubalaena japonica, an improved understanding of the environmental factors that influence the species’ distribution and occurrence is needed to better assess the effects of climate change and industrial activities on the population. Associations among right whales, zooplankton, and the physical environment were examined in the southeastern Bering Sea during the summers of 2008 and 2009. Sampling with nets, an optical plankton counter, and a video plankton recorder in proximity to whales as well as along cross-isobath surveys indicated that the copepod Calanus marshallae is the primary prey of right whales in this region. Acoustic detections of right whales from sonobuoys deployed during the cross-isobath surveys were strongly associated with C. marshallae abundance, and peak abundance estimates of C. marshallae in 2.5 m depth strata near a tagged right whale ranged as high as 106 copepods m-3. The smaller Pseudocalanus spp. was higher in abundance than C. marshallae in proximity to right whales, but significantly lower in biomass. High concentrations of C. marshallae occurred in both the surface and bottom layers of the highly stratified water column, but there was no evidence of diel vertical migration. Instead, occurrence of C. marshallae in the bottom layer was associated with elevated near-bottom light attenuance and chlorophyll fluorescence, suggesting C. marshallae may aggregate at depth while feeding on resuspended phytodetritus. Despite the occasional presence of strong horizontal gradients in hydrographic properties, no association was found between C. marshallae and either fronts or phytoplankton distribution. This study was funded by the US Depart - ment of the Interior, ... Article in Journal/Newspaper baleen whale Bering Sea Calanus glacialis Eubalaena japonica Copepods Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Bering Sea Pacific Marine Ecology Progress Series 490 267 284 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Eubalaena japonica Right whale Calanus marshallae Calanus glacialis Bering Sea Baleen whale Resuspension Phytodetritus |
spellingShingle |
Eubalaena japonica Right whale Calanus marshallae Calanus glacialis Bering Sea Baleen whale Resuspension Phytodetritus Baumgartner, Mark F. Lysiak, Nadine S. J. Esch, H. Carter Zerbini, Alexandre N. Berchok, Catherine L. Clapham, Phillip J. Associations between North Pacific right whales and their zooplanktonic prey in the southeastern Bering Sea |
topic_facet |
Eubalaena japonica Right whale Calanus marshallae Calanus glacialis Bering Sea Baleen whale Resuspension Phytodetritus |
description |
Author Posting. © Inter-Research, 2013. This article is posted here by permission of Inter-Research for personal use, not for redistribution. The definitive version was published in Marine Ecology Progress Series 490 (2013): 267-284, doi:10.3354/meps10457. Due to the seriously endangered status of North Pacific right whales Eubalaena japonica, an improved understanding of the environmental factors that influence the species’ distribution and occurrence is needed to better assess the effects of climate change and industrial activities on the population. Associations among right whales, zooplankton, and the physical environment were examined in the southeastern Bering Sea during the summers of 2008 and 2009. Sampling with nets, an optical plankton counter, and a video plankton recorder in proximity to whales as well as along cross-isobath surveys indicated that the copepod Calanus marshallae is the primary prey of right whales in this region. Acoustic detections of right whales from sonobuoys deployed during the cross-isobath surveys were strongly associated with C. marshallae abundance, and peak abundance estimates of C. marshallae in 2.5 m depth strata near a tagged right whale ranged as high as 106 copepods m-3. The smaller Pseudocalanus spp. was higher in abundance than C. marshallae in proximity to right whales, but significantly lower in biomass. High concentrations of C. marshallae occurred in both the surface and bottom layers of the highly stratified water column, but there was no evidence of diel vertical migration. Instead, occurrence of C. marshallae in the bottom layer was associated with elevated near-bottom light attenuance and chlorophyll fluorescence, suggesting C. marshallae may aggregate at depth while feeding on resuspended phytodetritus. Despite the occasional presence of strong horizontal gradients in hydrographic properties, no association was found between C. marshallae and either fronts or phytoplankton distribution. This study was funded by the US Depart - ment of the Interior, ... |
format |
Article in Journal/Newspaper |
author |
Baumgartner, Mark F. Lysiak, Nadine S. J. Esch, H. Carter Zerbini, Alexandre N. Berchok, Catherine L. Clapham, Phillip J. |
author_facet |
Baumgartner, Mark F. Lysiak, Nadine S. J. Esch, H. Carter Zerbini, Alexandre N. Berchok, Catherine L. Clapham, Phillip J. |
author_sort |
Baumgartner, Mark F. |
title |
Associations between North Pacific right whales and their zooplanktonic prey in the southeastern Bering Sea |
title_short |
Associations between North Pacific right whales and their zooplanktonic prey in the southeastern Bering Sea |
title_full |
Associations between North Pacific right whales and their zooplanktonic prey in the southeastern Bering Sea |
title_fullStr |
Associations between North Pacific right whales and their zooplanktonic prey in the southeastern Bering Sea |
title_full_unstemmed |
Associations between North Pacific right whales and their zooplanktonic prey in the southeastern Bering Sea |
title_sort |
associations between north pacific right whales and their zooplanktonic prey in the southeastern bering sea |
publisher |
Inter-Research |
publishDate |
2013 |
url |
https://hdl.handle.net/1912/6276 |
geographic |
Bering Sea Pacific |
geographic_facet |
Bering Sea Pacific |
genre |
baleen whale Bering Sea Calanus glacialis Eubalaena japonica Copepods |
genre_facet |
baleen whale Bering Sea Calanus glacialis Eubalaena japonica Copepods |
op_source |
Marine Ecology Progress Series 490 (2013): 267-284 doi:10.3354/meps10457 |
op_relation |
https://doi.org/10.3354/meps10457 Marine Ecology Progress Series 490 (2013): 267-284 https://hdl.handle.net/1912/6276 doi:10.3354/meps10457 |
op_doi |
https://doi.org/10.3354/meps10457 |
container_title |
Marine Ecology Progress Series |
container_volume |
490 |
container_start_page |
267 |
op_container_end_page |
284 |
_version_ |
1766367439151431680 |