Climate change to stunt pink salmon?

Well, it might if it acts like lab studies.  From, Climate change stunts pink salmon: Study

This one reports on a study of fresh water acidification from climate change. Climate change causes water acidification? Only if any increase in atmospheric CO2.  The report is on a study published in Nature Climate Change, Responses of pink salmon to CO2-induced aquatic acidification, which at growth rates of pink salmon from egg to movement to the ocean under different atmospheric CO2 concentrations, that might be seen in the future.  The abstract and first page of the article do not mention temperature or pH.


Ocean acidification negatively affects many marine species and is predicted to cause widespread changes to marine ecosystems. Similarly, freshwater ecosystems may potentially be affected by climate-change-related acidification; however, this has received far less attention. Freshwater fish represent 40% of all fishes, and salmon, which rear and spawn in freshwater, are of immense ecosystem, economical and cultural importance. In this study, we investigate the impacts of CO2-induced acidification during the development of pink salmon, in freshwater and following early seawater entry. At this critical and sensitive life stage, we show dose-dependent reductions in growth, yolk-to-tissue conversion and maximal O2 uptake capacity; as well as significant alterations in olfactory responses, anti-predator behaviour and anxiety under projected future increases in CO2 levels. These data indicate that future populations of pink salmon may be at risk without mitigation and highlight the need for further studies on the impact of CO2-induced acidification on freshwater systems.

It seems the high pCO2 results in more energy from the food sac going into energy and not growth.  No explanation was offered by the information before I got to the paywall.  Does it mean that the adult pink salmon are stunted?  They don’t say.  Does a one-variable study predict the future of pink salmon?  I doubt it.


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