Coastal zone

Tribal leaders and government official say there’s fewer salmon swimming off the coast of Northern California these days. I love salmon. So, of course, I immediately suspect polluted waters ..brought about by wetland destruction ..big know-it-all that I am. I follow coastal developments like this but not nearly close enough to trust my own conclusions. I ask professor Scott at UCSB and get a completely different answer. “It’s more complicated” he says “ ..ocean currents and water temperatures change and relocate the food supply. The salmon, however ..aren’t raised in the ocean ..they’re spawned in hatcheries. As a result, they stay genetically unchanged and continue to look for food in the same location instead of extending their boundaries. Each generation gets smaller instead of adapting.” I tell him thanks ..I did not know that ..and say it definitely reassures me I’m still evolving. My ignorance knows no boundaries.