Algal toxin impairs sea lion memory and hippocampal connectivity, with implications for strandings

Author:

Cook Peter F.12,Reichmuth Colleen2,Rouse Andrew A.2,Libby Laura A.3,Dennison Sophie E.4,Carmichael Owen T.5,Kruse-Elliott Kris T.4,Bloom Josh4,Singh Baljeet3,Fravel Vanessa A.6,Barbosa Lorraine6,Stuppino Jim J.4,Van Bonn William G.7,Gulland Frances M. D.6,Ranganath Charan3

Affiliation:

1. Center for Neuropolicy, Emory University, Atlanta, GA 30322, USA.

2. Pinniped Cognition and Sensory Systems Laboratory, Institute of Marine Sciences, University of California–Santa Cruz, Santa Cruz, CA 95060, USA.

3. Dynamic Memory Lab, Center for Neuroscience, University of California–Davis, Davis, CA 95618, USA.

4. AnimalScan Advanced Veterinary Imaging, Redwood City, CA 94063, USA.

5. Pennington Biomedical Research Center, Baton Rouge, LA 70808, USA.

6. The Marine Mammal Center, Sausalito, CA 94965, USA.

7. Shedd Aquarium, Chicago, IL 60605, USA.

Abstract

Red tides make dinner hard to find Domoic acid (DA) is a neurotoxin produced by marine algae. When present in large amounts, it is harmful to marine organisms and to humans. Cook et al. tested California sea lions being treated at a marine mammal rescue facility. Animals that had evidence of exposure to DA had lesions in their hippocampus and displayed reduced performance on spatial memory tasks. Because such tasks are essential to foraging in a marine environment, increasing exposure to DA may be contributing to increasing sea lion strandings. Science , this issue p. 1545

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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