New York Times: Most of the world`s important commercial fish species have been declining for years. Nearly one-fourth are unable, essentially, to reproduce. The biggest cause of the deterioration in ocean health — bigger than climate change or pollution — is overfishing. American fisheries are in better shape than most but not by much. The White House seems prepared to give this issue high priority. George W. Bush, though more sensitive to marine issues than other environmental problems, was slow …