Yale Environment 360 discusses how six in 10 Fish Species Could Face Reproductive Failure As Temperatures Rise.
An estimated 60 percent of fish species will struggle to reproduce in their current spawning habitats by 2100 under worst-case climate scenarios, according to a new study of nearly 700 salt and freshwater species published in the journal Science. The research argues that previous studies, which focused solely on adult fish, underestimate the impact climate change will have on economically and ecologically important species.
As temperatures rise, fish — like humans — need more energy to survive, which requires them to take in more oxygen. But embryos don’t have gills that allow them to take in additional oxygen. And spawning fish already require extra oxygen to support the production of eggs or sperm cells; warming temperatures just add to this strain.