| ID |
2808 |
| Citation |
Taylor, J.J, S.M. Wilson, N.M. Sopinka, S.G. Hinch, D.A. Patterson, S.J. Cooke, W.G. Willmore (2015) Are there intergenerational and population-specific effects of oxidative stress in sockeye salmon (Oncorhynchus nerka)? Comparative Biochemistry and Physiology, Part A 184:97–104. http://dx.doi.org/10.1016/j.cbpa.2015.01.022. |
| Organization |
Carleton University; University of British Columbia; Fisheries and Oceans Canada; Simon Fraser University |
| URL |
http://www.fecpl.ca/wp-content/uploads/2015/01/Taylor-et-al.-2015.pdf |
| Abstract/Description or Keywords |
Intergenerational effects of stress have been reported in awide range of taxa; however, fewresearchers have examined the intergenerational consequences of oxidative stress. Oxidative stress occurs in living organisms when reactive oxygen species remain unquenched by antioxidant defense systems and become detrimental to cells. In fish, it is unknown how maternal oxidative stress and antioxidant capacity influence offspring quality. The semelparous, migratory life history of Pacific salmon (Oncorhynchus spp.) provides a unique opportunity to explore intergenerational effects of oxidative stress. This study examined the effects of population origin onmaternal and developing offspring oxidative stress and antioxidant capacity, and elucidated intergenerational relationships among populations of sockeye salmon (Oncorhynchus nerka) with varying migration effort. For three geographically distinct populations of Fraser River sockeye salmon (British Columbia, Canada), antioxidant capacity and oxidative stress were measured in adult female plasma, heart, brain, and liver, as well as in developing offspring until time of emergence. Maternal and offspring oxidative stress and antioxidant capacity varied among populations but patternswere not consistent across tissue/developmental stage. Furthermore, maternal oxidative stress and antioxidant capacity did not affect offspring oxidative stress and antioxidant capacity across any of the developmental stages or populations sampled. Our results revealed that offspring develop their endogenous antioxidant systems at varying rates across populations; however, this variability is overcome by the time of emergence. While offspring may be relying on maternally derived antioxidants in the initial stages of development, they rapidly develop their own antioxidant systems (mainly glutathione) during later stages of development. Sockeye salmon; Egg cortisol; Intergenerational effects; Oxidative stress; Antioxidant capacity |
| Information Type |
Article |
| Regional Watershed |
Fraser River |
| Sub-watershed if known |
Harrison River; Chilko River; Stellako River |
| Aquifer # |
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| Comments |
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| Project status |
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| Contact Name |
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