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talk-mj-2019

NOAA Monster Jam Seminar
May 2, 2019

INTERGENERATIONAL CARRYOVER EFFECTS IN SHELLFISH AND THE CONSIDERATION OF A ROLE FOR DNA METHYLATION

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SLIDEDECK (HQ): https://d.pr/f/UXD5Ij

Bio
Steven Roberts is the Kenneth K. Chew Endowed Associate Professor in the School of Aquatic and Fishery Sciences. Dr. Roberts received his Ph.D. in Biology at the University of Notre Dame in 2002. His main research interest is the physiological response of aquatic species to environmental change with a particular focus on environmental epigenetics, reproductive biology, and aquaculture.

Abstract
It is increasingly evident that environmental perturbations can have impacts on marine invertebrates beyond acute exposure periods. In some instances this might manifest as an adult phenotype that is associated with an early-life stage exposure event. There is also the case where parental environmental exposures can influence offspring phenotype. The processes involved in these intergenerational carryover effects can be diverse in nature, and can be related to physiological compromise in adults that results in negative effects linked to poor quality gametes or insufficient maternal resource allocation. However, in some cases an environmental perturbation experienced by parents might result in a positive effect in offspring, such as improved performance upon secondary exposure to the condition experienced by the parents. Results from recent experiments looking at intergenerational carryover effects in oysters (Ostrea and Crassostrea) and geoduck clams will be presented. Specific environmental condtions examined include temperture, diet, and seawater pH. In addition, preliminary data will be discussed in terms of a role for DNA methylation as a mechanisms for environmental memory within and across generations.

Papers

Carry-over effects of temperature and pCO2 in multiple Olympia oyster populations Laura H Spencer, Yaamini R Venkataraman, Ryan Crim, Stuart Ryan, Micah J Horwith, Steven B Roberts doi: https://doi.org/10.1101/616375

Venkataraman YR, Spencer LH, Roberts SB. (2019) Adult low pH exposure influences larval abundance in Pacific oysters (Crassostrea gigas) Journal of Shellfish Research.
https://digital.lib.washington.edu/researchworks/handle/1773/43182

Putnam, Hollie; Roberts, Steven; Spencer, Laura H. (2017): CAPACITY FOR ADAPTATION AND ACCLIMATIZATION TO OCEAN ACIDIFICATION IN GEODUCK THROUGH EPIGENETIC MECHANISMS. figshare. Poster. https://doi.org/10.6084/m9.figshare.4990889.v1

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