Internal waves interact with topography over a small bank to produce a highly-focused feeding environment for fish, whales and birds
No abstracts are to be cited without prior reference to the author. A small (9x15 km) offshore bank in the Gulf of Maine (Platts Bank) is sometimes the focal point of intense feeding by herring, marine mammals and birds. Humpback whales (Megaptera noviangliae) use only a small portion of even this s...
Main Authors: | , , , , , , |
---|---|
Format: | Conference Object |
Language: | unknown |
Published: |
2007
|
Subjects: | |
Online Access: | https://doi.org/10.17895/ices.pub.25257868.v2 |
id |
ftsmithonianinsp:oai:figshare.com:article/25257868 |
---|---|
record_format |
openpolar |
spelling |
ftsmithonianinsp:oai:figshare.com:article/25257868 2024-04-14T08:14:45+00:00 Internal waves interact with topography over a small bank to produce a highly-focused feeding environment for fish, whales and birds Lewis Incze N. Wolff J. Lerczak S. Rosen S. Kraus P. Stevic A. Baukus 2007-09-01T00:00:00Z https://doi.org/10.17895/ices.pub.25257868.v2 unknown https://figshare.com/articles/conference_contribution/Is_the_distribution_of_the_Portuguese_dogfish_related_with_environmental_factors_/25257868 doi:10.17895/ices.pub.25257868.v2 ICES Custom Licence Ecosystem observation processes and dynamics CM 2007/G Gulf of Maine Topography Internal waves Text Conference contribution 2007 ftsmithonianinsp https://doi.org/10.17895/ices.pub.25257868.v2 2024-03-18T19:37:52Z No abstracts are to be cited without prior reference to the author. A small (9x15 km) offshore bank in the Gulf of Maine (Platts Bank) is sometimes the focal point of intense feeding by herring, marine mammals and birds. Humpback whales (Megaptera noviangliae) use only a small portion of even this small bank as they feed on euphausiids (Meganyctiphanes norvegica). The euphausiids are similarly abundant on and off the bank, but form dense surface swarms near the crest of the bank. The swarms form abruptly and last only a few minutes or less before euphausiids descend below the surface, but they are quickly exploited by whales that appear to be well tuned to the brief but frequent appearances. The swarms appear to form in response to passing internal waves that are brought near the surface as the pycnocline shallows over the crest (internal tide) during periods of strong tidal flow. This only occurs when euphausiids are above the pycnocline and it may be reinforced by density-dependent (schooling) behavior, factors that may account for within- and between-year differences in feeding activity on the bank. While euphausiids are supplied to the crest from a large area related to the tidal ellipse and a residual flow field, the trophic transfer remains spatially very constrained. Conference Object Meganyctiphanes norvegica Smithsonian Institution: Figshare |
institution |
Open Polar |
collection |
Smithsonian Institution: Figshare |
op_collection_id |
ftsmithonianinsp |
language |
unknown |
topic |
Ecosystem observation processes and dynamics CM 2007/G Gulf of Maine Topography Internal waves |
spellingShingle |
Ecosystem observation processes and dynamics CM 2007/G Gulf of Maine Topography Internal waves Lewis Incze N. Wolff J. Lerczak S. Rosen S. Kraus P. Stevic A. Baukus Internal waves interact with topography over a small bank to produce a highly-focused feeding environment for fish, whales and birds |
topic_facet |
Ecosystem observation processes and dynamics CM 2007/G Gulf of Maine Topography Internal waves |
description |
No abstracts are to be cited without prior reference to the author. A small (9x15 km) offshore bank in the Gulf of Maine (Platts Bank) is sometimes the focal point of intense feeding by herring, marine mammals and birds. Humpback whales (Megaptera noviangliae) use only a small portion of even this small bank as they feed on euphausiids (Meganyctiphanes norvegica). The euphausiids are similarly abundant on and off the bank, but form dense surface swarms near the crest of the bank. The swarms form abruptly and last only a few minutes or less before euphausiids descend below the surface, but they are quickly exploited by whales that appear to be well tuned to the brief but frequent appearances. The swarms appear to form in response to passing internal waves that are brought near the surface as the pycnocline shallows over the crest (internal tide) during periods of strong tidal flow. This only occurs when euphausiids are above the pycnocline and it may be reinforced by density-dependent (schooling) behavior, factors that may account for within- and between-year differences in feeding activity on the bank. While euphausiids are supplied to the crest from a large area related to the tidal ellipse and a residual flow field, the trophic transfer remains spatially very constrained. |
format |
Conference Object |
author |
Lewis Incze N. Wolff J. Lerczak S. Rosen S. Kraus P. Stevic A. Baukus |
author_facet |
Lewis Incze N. Wolff J. Lerczak S. Rosen S. Kraus P. Stevic A. Baukus |
author_sort |
Lewis Incze |
title |
Internal waves interact with topography over a small bank to produce a highly-focused feeding environment for fish, whales and birds |
title_short |
Internal waves interact with topography over a small bank to produce a highly-focused feeding environment for fish, whales and birds |
title_full |
Internal waves interact with topography over a small bank to produce a highly-focused feeding environment for fish, whales and birds |
title_fullStr |
Internal waves interact with topography over a small bank to produce a highly-focused feeding environment for fish, whales and birds |
title_full_unstemmed |
Internal waves interact with topography over a small bank to produce a highly-focused feeding environment for fish, whales and birds |
title_sort |
internal waves interact with topography over a small bank to produce a highly-focused feeding environment for fish, whales and birds |
publishDate |
2007 |
url |
https://doi.org/10.17895/ices.pub.25257868.v2 |
genre |
Meganyctiphanes norvegica |
genre_facet |
Meganyctiphanes norvegica |
op_relation |
https://figshare.com/articles/conference_contribution/Is_the_distribution_of_the_Portuguese_dogfish_related_with_environmental_factors_/25257868 doi:10.17895/ices.pub.25257868.v2 |
op_rights |
ICES Custom Licence |
op_doi |
https://doi.org/10.17895/ices.pub.25257868.v2 |
_version_ |
1796312978931318784 |