Evaluating cardiac oxygen limitation as a mechanism for female-biased mortality in coho salmon (Oncorhynchus kisutch)

This study found no clear support for a cardiac oxygen limitatio n underlying elevated female mortality in Pacific salmon. Neither, however, does our study design nor specific findings allow us to rule out cardiac limitations in these fish. Future work should address whether potential oxygen limitations to the spongy myocardium at high temperatures or oxygen limi tations to the compact myocardium via coronary blood flow contribute to female-biased mortality earlier on the migratory route.

Source: Canadian Journal of Zoology - October 28, 2022 Category: Zoology Authors: A.G. Little T.S. Prystay E.A. Hardison T. Dressler K Kraskura S.J. Cooke D.A. Patterson S.G. Hinch E.J. Eliason Source Type: research