Presentation Abstract
The synergy of ocean acidification and ocean warming may lead to negative marine organism responses not apparent under single stressors. While adult fish are effective acid-base regulators, and presumably less affected by environmental stressors, early life stages may be more susceptible. Pacific herring are ecologically and economically important forage fish, native to the U.S. Pacific Northwest (PNW). However, the herring populations in the PNW have experienced reductions in stock abundance. This study focused on the combined effects of ocean acidification and ocean warming on Pacific herring embryo and larval life stages. Pacific herring embryos were incubated under a factorial design of two temperature (10°C, 16°C) and two pCO2 (600 µatm, 1600 µatm) treatments until hatch. The combination of high pCO2 and high temperature revealed greater embryo respiration aberrations. Embryos reared under the high temperature treatment, for both pCO2 levels, experienced greater occurrences of larval mortality and abnormalities. These data indicate that while temperature may be a primary global change stressor affecting Pacific herring embryology and future herring populations, interactive effects with pCO2 may introduce additional challenges.
Session Title
Advances in the Understanding of Drivers of Change and Potential Conservation Actions for Pacific Herring in the Salish Sea
Keywords
Ocean acidification, Interactive effects
Conference Track
SSE11: Species and Food Webs
Conference Name
Salish Sea Ecosystem Conference (2018 : Seattle, Wash.)
Document Type
Event
SSEC Identifier
SSE11-170
Start Date
6-4-2018 1:45 PM
End Date
6-4-2018 2:00 PM
Type of Presentation
Oral
Genre/Form
conference proceedings; presentations (communicative events)
Contributing Repository
Digital content made available by University Archives, Heritage Resources, Western Libraries, Western Washington University.
Subjects – Topical (LCSH)
Pacific herring populations--Northwest, Pacific; Forage fishes--Mortality--Northwest, Pacific; Ocean acidification--Northwest, Pacific; Ocean temperature--Northwest, Pacific; Fishes--Embryos--Northwest, Pacific
Geographic Coverage
Northwest, Pacific
Rights
This resource is displayed for educational purposes only and may be subject to U.S. and international copyright laws. For more information about rights or obtaining copies of this resource, please contact University Archives, Heritage Resources, Western Libraries, Western Washington University, Bellingham, WA 98225-9103, USA (360-650-7534; heritage.resources@wwu.edu) and refer to the collection name and identifier. Any materials cited must be attributed to the Salish Sea Ecosystem Conference Records, University Archives, Heritage Resources, Western Libraries, Western Washington University.
Type
Text
Language
English
Format
application/pdf
Included in
Fresh Water Studies Commons, Marine Biology Commons, Natural Resources and Conservation Commons, Terrestrial and Aquatic Ecology Commons
Interactive effects of ocean acidification and ocean warming on Pacific herring (Clupea pallasi) early life stages
The synergy of ocean acidification and ocean warming may lead to negative marine organism responses not apparent under single stressors. While adult fish are effective acid-base regulators, and presumably less affected by environmental stressors, early life stages may be more susceptible. Pacific herring are ecologically and economically important forage fish, native to the U.S. Pacific Northwest (PNW). However, the herring populations in the PNW have experienced reductions in stock abundance. This study focused on the combined effects of ocean acidification and ocean warming on Pacific herring embryo and larval life stages. Pacific herring embryos were incubated under a factorial design of two temperature (10°C, 16°C) and two pCO2 (600 µatm, 1600 µatm) treatments until hatch. The combination of high pCO2 and high temperature revealed greater embryo respiration aberrations. Embryos reared under the high temperature treatment, for both pCO2 levels, experienced greater occurrences of larval mortality and abnormalities. These data indicate that while temperature may be a primary global change stressor affecting Pacific herring embryology and future herring populations, interactive effects with pCO2 may introduce additional challenges.
