Using the Continuous Plankton Recorder to investigate the absence of North Atlantic right whales (Eubalaena glacialis) from the Roseway Basin foraging ground
Patrician, Melissa R.
Kenney, Robert D.
MetadataShow full item record
KeywordEubalaena glacialis; Roseway Basin; Calanus finmarchicus; Continuous Plankton Recorder; Habitat requirements
North Atlantic right whales (Eubalaena glacialis) abandoned Roseway Basin, located off southeastern Nova Scotia, for a seven-year period (1993-1999). The objective of this study was to examine the availability of the right whale’s main prey, Calanus finmarchicus, in Roseway Basin during the abandonment to determine if right whales left this region due to inadequate prey resources. Since we had no historical data on zooplankton abundances at depth on the Scotian Shelf, near-surface zooplankton abundance data from the Continuous Plankton Recorder were used to infer water column abundances. In addition, environmental parameters that are often correlated with high zooplankton concentrations were examined. The hypotheses tested were that changes in these parameters would be detectable between three time periods: pre-1993, 1993-1999, and post-1999. Calanus finmarchicus abundance was found to be lowest during 1993-1999, confirming that right whales were not foraging in Roseway Basin because of the near-absence of their main prey species. Decreased in situ salinity and density proved to be indicators of the changes in circulation in the 1990s that may have affected the advection of C. finmarchicus onto the Scotian Shelf.
Author Posting. © The Authors, 2010. This is the author's version of the work. It is posted here by permission of Oxford University Press for personal use, not for redistribution. The definitive version was published in Journal of Plankton Research 32 (2010): 1685-1695, doi:10.1093/plankt/fbq073.
Showing items related by title, author, creator and subject.
Blubber thickness in right whales Eubalaena glacialis and Eubalaena australis related with reproduction, life history status and prey abundance Miller, Carolyn A.; Reeb, Desray; Best, Peter B.; Knowlton, Amy R.; Brown, Moira W.; Moore, Michael J. (Inter-Research, 2011-10-05)The high variability in reproductive performance of North Atlantic right whales Eubalaena glacialis compared to southern right whales Eubalaena australis may reflect differences in lipid reserves. Amplitude-mode ultrasound ...
Nowacek, Douglas P. (The DTAG Project, Woods Hole Oceanographic Institution, contacts: email@example.com; and NRC, NOAA, contacts: Doug Nowacek, firstname.lastname@example.org, 2010-12-14)Location: Bay of Fundy, Canada, Species: Eubalaena glacialis (Northern Atlantic Right Whale), Permit: , Water Depth: 205m
Nowacek, Douglas P. (The DTAG Project, Woods Hole Oceanographic Institution, contacts: email@example.com; and NRC, NOAA, contacts: Doug Nowacek, firstname.lastname@example.org, 2010-12-14)Location: Bay of Fundy, Canada, Species: Eubalaena glacialis (Northern Atlantic Right Whale), Permit: US National Marine Fisheries Service Permit #1014 issued to Scott Kraus and Canadian Department of Fisheries and Oceans ...