Whales and waves : humpback whale foraging response and the shoaling of internal waves at Stellwagen Bank
Author Posting. © American Geophysical Union, 2015. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 120 (2015): 2555–2570, doi:10.1002/2014JC010564. We te...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/7338 2023-05-15T16:36:11+02:00 Whales and waves : humpback whale foraging response and the shoaling of internal waves at Stellwagen Bank Pineda, Jesus Starczak, Victoria R. da Silva, Jose C. B. Helfrich, Karl R. Thompson, Michael A. Wiley, David N. 2015-04-02 application/pdf https://hdl.handle.net/1912/7338 en_US eng John Wiley & Sons https://doi.org/10.1002/2014JC010564 Journal of Geophysical Research: Oceans 120 (2015): 2555–2570 https://hdl.handle.net/1912/7338 doi:10.1002/2014JC010564 Journal of Geophysical Research: Oceans 120 (2015): 2555–2570 doi:10.1002/2014JC010564 Humpback whales Nonlinear internal waves Shallow temperate bank Ecological hotspots Article 2015 ftwhoas https://doi.org/10.1002/2014JC010564 2022-05-28T22:59:21Z Author Posting. © American Geophysical Union, 2015. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 120 (2015): 2555–2570, doi:10.1002/2014JC010564. We tested the hypothesis that humpback whales aggregate at the southern flank of Stellwagen Bank (SB) in response to internal waves (IWs) generated semidiurnally at Race Point (RP) channel because of the presence of their preferred prey, planktivorous fish, which in turn respond to zooplankton concentrated by the predictable IWs. Analysis of synthetic aperture radar (SAR) images indicates that RP IWs approach the southern flank of SB frequently (∼62% of the images). Published reports of whale sighting data and archived SAR images point to a coarse spatial coincidence between whales and Race Point IWs at SB's southern flank. The responses of whales to IWs were evaluated via sightings and behavior of humpback whales, and IWs were observed in situ by acoustic backscatter and temperature measurements. Modeling of IWs complemented the observations, and results indicate a change of ∼0.4 m/s in current velocity, and ∼1.5 Pa in dynamic pressure near the bottom, which may be sufficient for bottom fish to detect the IWs. However, fish were rare in our acoustic observations, and fish response to the IWs could not be evaluated. RP IWs do not represent the leading edge of the internal tide, and they may have less mass-transport potential than typical coastal IWs. There was large interannual variability in whale sightings at SB's southern flank, with decreases in both numbers of sightings and proportion of sightings where feeding was observed from 2008 to 2013. Coincidence of whales and IWs was inconsistent, and results do not support the hypothesis. We would also like to acknowledge funding from the National Oceanic and Atmospheric Administration Sea Grant (Woods Hole), the Woods Hole Oceanographic Institution, the ESA, and the ... Article in Journal/Newspaper Humpback Whale Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Journal of Geophysical Research: Oceans 120 4 2555 2570 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Humpback whales Nonlinear internal waves Shallow temperate bank Ecological hotspots |
spellingShingle |
Humpback whales Nonlinear internal waves Shallow temperate bank Ecological hotspots Pineda, Jesus Starczak, Victoria R. da Silva, Jose C. B. Helfrich, Karl R. Thompson, Michael A. Wiley, David N. Whales and waves : humpback whale foraging response and the shoaling of internal waves at Stellwagen Bank |
topic_facet |
Humpback whales Nonlinear internal waves Shallow temperate bank Ecological hotspots |
description |
Author Posting. © American Geophysical Union, 2015. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 120 (2015): 2555–2570, doi:10.1002/2014JC010564. We tested the hypothesis that humpback whales aggregate at the southern flank of Stellwagen Bank (SB) in response to internal waves (IWs) generated semidiurnally at Race Point (RP) channel because of the presence of their preferred prey, planktivorous fish, which in turn respond to zooplankton concentrated by the predictable IWs. Analysis of synthetic aperture radar (SAR) images indicates that RP IWs approach the southern flank of SB frequently (∼62% of the images). Published reports of whale sighting data and archived SAR images point to a coarse spatial coincidence between whales and Race Point IWs at SB's southern flank. The responses of whales to IWs were evaluated via sightings and behavior of humpback whales, and IWs were observed in situ by acoustic backscatter and temperature measurements. Modeling of IWs complemented the observations, and results indicate a change of ∼0.4 m/s in current velocity, and ∼1.5 Pa in dynamic pressure near the bottom, which may be sufficient for bottom fish to detect the IWs. However, fish were rare in our acoustic observations, and fish response to the IWs could not be evaluated. RP IWs do not represent the leading edge of the internal tide, and they may have less mass-transport potential than typical coastal IWs. There was large interannual variability in whale sightings at SB's southern flank, with decreases in both numbers of sightings and proportion of sightings where feeding was observed from 2008 to 2013. Coincidence of whales and IWs was inconsistent, and results do not support the hypothesis. We would also like to acknowledge funding from the National Oceanic and Atmospheric Administration Sea Grant (Woods Hole), the Woods Hole Oceanographic Institution, the ESA, and the ... |
format |
Article in Journal/Newspaper |
author |
Pineda, Jesus Starczak, Victoria R. da Silva, Jose C. B. Helfrich, Karl R. Thompson, Michael A. Wiley, David N. |
author_facet |
Pineda, Jesus Starczak, Victoria R. da Silva, Jose C. B. Helfrich, Karl R. Thompson, Michael A. Wiley, David N. |
author_sort |
Pineda, Jesus |
title |
Whales and waves : humpback whale foraging response and the shoaling of internal waves at Stellwagen Bank |
title_short |
Whales and waves : humpback whale foraging response and the shoaling of internal waves at Stellwagen Bank |
title_full |
Whales and waves : humpback whale foraging response and the shoaling of internal waves at Stellwagen Bank |
title_fullStr |
Whales and waves : humpback whale foraging response and the shoaling of internal waves at Stellwagen Bank |
title_full_unstemmed |
Whales and waves : humpback whale foraging response and the shoaling of internal waves at Stellwagen Bank |
title_sort |
whales and waves : humpback whale foraging response and the shoaling of internal waves at stellwagen bank |
publisher |
John Wiley & Sons |
publishDate |
2015 |
url |
https://hdl.handle.net/1912/7338 |
genre |
Humpback Whale |
genre_facet |
Humpback Whale |
op_source |
Journal of Geophysical Research: Oceans 120 (2015): 2555–2570 doi:10.1002/2014JC010564 |
op_relation |
https://doi.org/10.1002/2014JC010564 Journal of Geophysical Research: Oceans 120 (2015): 2555–2570 https://hdl.handle.net/1912/7338 doi:10.1002/2014JC010564 |
op_doi |
https://doi.org/10.1002/2014JC010564 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
120 |
container_issue |
4 |
container_start_page |
2555 |
op_container_end_page |
2570 |
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1766026492392767488 |