CS16 Harmful Algal Blooms
Date: Wednesday, June 12, 2002
Time: 4:15:00 PM
Location: Sidney
 
DurbinEG, University of Rhode Island, Narragansett, USA, edurbin@gso.uri.edu
Teegarden, G, J, Bowdoin College, Brunswick, USA, gteegard@bowdoin.edu
Campbell, R, G, University of Rhode Island, Narragansett, USA, rcampbell@gso.uri.edu
Cembella, A, D, Institute for Marine Biosciences, Halifax, Canada, Allan.Cembella@nrc.ca
Baumgartner, M, , Oregon State University, Corvallis, USA, mbaumgar@oce.orst.edu
 
NORTH ATLANTIC RIGHT WHALES, EUBALAENA GLACIALIS, EXPOSED TO ALEXANDRIUM SPP. PSP TOXINS VIA A ZOOPLANKTON VECTOR, CALANUS FINMARCHICUS
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The large copepod, Calanus finmarchicus, feeds upon PSP toxin producing dinoflagellates, Alexandrium spp., in both the laboratory and in the field. Although efficiency of toxin retention is low, total levels of toxin body burden accumulated can be high. A summer field study in the Grand Manan Basin, lower Bay of Fundy, where Alexandrium spp. regularly bloom, has shown a Calanus spp. population with a split vertical distribution, comprising a small surface population and a larger deep resting population. In the vicinity of feeding right whales, copepods from both surface and deep pools were collected by MOCNESS tows, and were analyzed for PSP toxins with HPLC-FD. Both surface and deep samples contained significant levels of toxin. A significant proportion of the western north Atlantic right whale population feeds each summer in the Grand Manan Basin. Older stages of Calanus are a preferred food source of the right whales. Estimates of exposure of right whales to toxin will be presented.