Associations between North Atlantic right whales and their prey, Calanus finmarchicus, over diel and tidal time scales
Temporal variability in the distribution and abundance of North Atlantic right whales Eubalaena glacialis and their copepod prey, late-stage Calanus finmarchicus, was monitored at an oceanographic station in Grand Manan Basin of the lower Bay of Fundy for 29 h on 2 separate occasions. The vertical d...
Published in: | Marine Ecology Progress Series |
---|---|
Main Authors: | , , , , |
Format: | Text |
Language: | unknown |
Published: |
DigitalCommons@URI
2003
|
Subjects: | |
Online Access: | https://digitalcommons.uri.edu/gsofacpubs/1267 https://doi.org/10.3354/meps264155 |
id |
ftunivrhodeislan:oai:digitalcommons.uri.edu:gsofacpubs-2236 |
---|---|
record_format |
openpolar |
spelling |
ftunivrhodeislan:oai:digitalcommons.uri.edu:gsofacpubs-2236 2023-12-03T10:20:38+01:00 Associations between North Atlantic right whales and their prey, Calanus finmarchicus, over diel and tidal time scales Baumgartner, Mark F. Cole, Tim V.N. Campbell, Robert G. Teegarden, Gregory J. Durbin, Edward G. 2003-12-15T08:00:00Z https://digitalcommons.uri.edu/gsofacpubs/1267 https://doi.org/10.3354/meps264155 unknown DigitalCommons@URI https://digitalcommons.uri.edu/gsofacpubs/1267 doi:10.3354/meps264155 https://doi.org/10.3354/meps264155 Graduate School of Oceanography Faculty Publications Bay of Fundy Calanus finmarchicus Diel vertical migration Eubalaena glacialis Gulf of maine Optical plankton counter Right whale Tides text 2003 ftunivrhodeislan https://doi.org/10.3354/meps264155 2023-11-06T19:10:02Z Temporal variability in the distribution and abundance of North Atlantic right whales Eubalaena glacialis and their copepod prey, late-stage Calanus finmarchicus, was monitored at an oceanographic station in Grand Manan Basin of the lower Bay of Fundy for 29 h on 2 separate occasions. The vertical distribution of C. finmarchicus was measured at V2 h intervals with an optical plankton counter (OPC) and at 6 or 12 h intervals with a MOCNESS. Right whale abundance was estimated from periodic point scans. Late-stage C. finmarchicus exhibited diel vertical migration in the upper 100 m of the water column, but the bulk of the population remained at depths below 100 m throughout both the day and night and was likely in diapause. Diel vertical migration is unlikely to be influenced by right whales, but may instead be motivated by abundant, near-surface food resources and avoidance of visual predators. Right whale sighting rate was correlated with OPC-detected C. finmarchicus fifth copepodite (C5) abundance at mid-depths (90-140 m); variability in both right whale sighting rate and C. finmarchicus C5 abundance in this depth stratum appeared to have similar periodicity to that of the tide. Energetic considerations suggest that right whales continue to feed on deep, diapausing layers of C. finmarchicus during the night, but the occasional presence of exploitable near-surface concentrations of C. finmarchicus suggests that nighttime near-surface feeding might sometimes occur. Text Calanus finmarchicus Eubalaena glacialis North Atlantic University of Rhode Island: DigitalCommons@URI Lower Bay ENVELOPE(-97.817,-97.817,58.821,58.821) Manan ENVELOPE(8.748,8.748,62.793,62.793) Marine Ecology Progress Series 264 155 166 |
institution |
Open Polar |
collection |
University of Rhode Island: DigitalCommons@URI |
op_collection_id |
ftunivrhodeislan |
language |
unknown |
topic |
Bay of Fundy Calanus finmarchicus Diel vertical migration Eubalaena glacialis Gulf of maine Optical plankton counter Right whale Tides |
spellingShingle |
Bay of Fundy Calanus finmarchicus Diel vertical migration Eubalaena glacialis Gulf of maine Optical plankton counter Right whale Tides Baumgartner, Mark F. Cole, Tim V.N. Campbell, Robert G. Teegarden, Gregory J. Durbin, Edward G. Associations between North Atlantic right whales and their prey, Calanus finmarchicus, over diel and tidal time scales |
topic_facet |
Bay of Fundy Calanus finmarchicus Diel vertical migration Eubalaena glacialis Gulf of maine Optical plankton counter Right whale Tides |
description |
Temporal variability in the distribution and abundance of North Atlantic right whales Eubalaena glacialis and their copepod prey, late-stage Calanus finmarchicus, was monitored at an oceanographic station in Grand Manan Basin of the lower Bay of Fundy for 29 h on 2 separate occasions. The vertical distribution of C. finmarchicus was measured at V2 h intervals with an optical plankton counter (OPC) and at 6 or 12 h intervals with a MOCNESS. Right whale abundance was estimated from periodic point scans. Late-stage C. finmarchicus exhibited diel vertical migration in the upper 100 m of the water column, but the bulk of the population remained at depths below 100 m throughout both the day and night and was likely in diapause. Diel vertical migration is unlikely to be influenced by right whales, but may instead be motivated by abundant, near-surface food resources and avoidance of visual predators. Right whale sighting rate was correlated with OPC-detected C. finmarchicus fifth copepodite (C5) abundance at mid-depths (90-140 m); variability in both right whale sighting rate and C. finmarchicus C5 abundance in this depth stratum appeared to have similar periodicity to that of the tide. Energetic considerations suggest that right whales continue to feed on deep, diapausing layers of C. finmarchicus during the night, but the occasional presence of exploitable near-surface concentrations of C. finmarchicus suggests that nighttime near-surface feeding might sometimes occur. |
format |
Text |
author |
Baumgartner, Mark F. Cole, Tim V.N. Campbell, Robert G. Teegarden, Gregory J. Durbin, Edward G. |
author_facet |
Baumgartner, Mark F. Cole, Tim V.N. Campbell, Robert G. Teegarden, Gregory J. Durbin, Edward G. |
author_sort |
Baumgartner, Mark F. |
title |
Associations between North Atlantic right whales and their prey, Calanus finmarchicus, over diel and tidal time scales |
title_short |
Associations between North Atlantic right whales and their prey, Calanus finmarchicus, over diel and tidal time scales |
title_full |
Associations between North Atlantic right whales and their prey, Calanus finmarchicus, over diel and tidal time scales |
title_fullStr |
Associations between North Atlantic right whales and their prey, Calanus finmarchicus, over diel and tidal time scales |
title_full_unstemmed |
Associations between North Atlantic right whales and their prey, Calanus finmarchicus, over diel and tidal time scales |
title_sort |
associations between north atlantic right whales and their prey, calanus finmarchicus, over diel and tidal time scales |
publisher |
DigitalCommons@URI |
publishDate |
2003 |
url |
https://digitalcommons.uri.edu/gsofacpubs/1267 https://doi.org/10.3354/meps264155 |
long_lat |
ENVELOPE(-97.817,-97.817,58.821,58.821) ENVELOPE(8.748,8.748,62.793,62.793) |
geographic |
Lower Bay Manan |
geographic_facet |
Lower Bay Manan |
genre |
Calanus finmarchicus Eubalaena glacialis North Atlantic |
genre_facet |
Calanus finmarchicus Eubalaena glacialis North Atlantic |
op_source |
Graduate School of Oceanography Faculty Publications |
op_relation |
https://digitalcommons.uri.edu/gsofacpubs/1267 doi:10.3354/meps264155 https://doi.org/10.3354/meps264155 |
op_doi |
https://doi.org/10.3354/meps264155 |
container_title |
Marine Ecology Progress Series |
container_volume |
264 |
container_start_page |
155 |
op_container_end_page |
166 |
_version_ |
1784268092472295424 |