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Full-Text Articles in Life Sciences

Elevated Carbon Dioxide Alters Neural Signaling And Anti-Predator Behaviors In Ocean Phase Coho Salmon (Oncorhynchus Kisutch), Chase Williams, Evan Gallagher, Andrew Dittman, Paul Mcelhany, Shallin Busch, Theo Bammler, James Macdonald Apr 2018

Elevated Carbon Dioxide Alters Neural Signaling And Anti-Predator Behaviors In Ocean Phase Coho Salmon (Oncorhynchus Kisutch), Chase Williams, Evan Gallagher, Andrew Dittman, Paul Mcelhany, Shallin Busch, Theo Bammler, James Macdonald

Salish Sea Ecosystem Conference

Elevated levels of CO2 have been shown to disrupt numerous neurological sensory systems in marine fish. This is of concern as Pacific salmon rely heavily on an important neurosensory system for survival, the olfactory system. In this study, we investigated the effects of elevated CO2 on a salmon olfactory driven behavior, as well as changes in neural signaling and gene expression within the peripheral and central olfactory system. Juvenile coho salmon were exposed to three different levels of CO2 for two weeks. These included a current CO2 level with a pH of 7.8, a medium CO2 level with a pH …


Does Eelgrass Act As An Ocean Acidification Refuge For Shellfish In The Salish Sea?, Bonnie Becker, Michelle Mccartha, Micah Horwith Apr 2018

Does Eelgrass Act As An Ocean Acidification Refuge For Shellfish In The Salish Sea?, Bonnie Becker, Michelle Mccartha, Micah Horwith

Salish Sea Ecosystem Conference

Marine waters worldwide are becoming more acidic due to increasing atmospheric carbon dioxide levels. Changes in pH are heterogeneous in space and time and can be affected by physical and biological processes, including photosynthesis and respiration of plants and animals. Previous studies have shown that seagrass beds, which contain a large amount of plant biomass, can alter the carbonate chemistry in the immediate area, with higher pH during the day and lower pH at night. We explored the effects of this pattern on bivalve shellfish at four sites in Puget Sound and Willapa Bay. Pumped water samples were taken at …


Herbivore Grazing Increases Polyphenolic Defenses In The Intertidal Brown Alga Fucus Distichus, Kathryn L. Van Alstyne Dr. Jun 1988

Herbivore Grazing Increases Polyphenolic Defenses In The Intertidal Brown Alga Fucus Distichus, Kathryn L. Van Alstyne Dr.

Shannon Point Marine Center Faculty Publications

Although predator-induced defenses have been reported for several species of terrestrial vascular plants, they have not been previously described in aquatic or nonvascular plants. In this study, field manipulations were used to demonstrate the presence of inducible chemical defense production in the intertidal brown alga Fucus distich us. When experimentally damaged, Fucus increased its concentrations of polyphenolic compounds by ≈20% over uninjured control plants within 2 wk. These increases occurred in the area where the plant was injured and within adjacent undamaged branches. The increase in concentrations of polyphenolic compounds in clipped plants in these experiments corresponded well with differences …