How did you come up with all the names of the flies that you developed,” a fly-fishing friend asked me last week as we ...

Cambodia has become just the second country in the region, behind Laos, to build fish passages, an innovative solution to the challenges posed by irrigation and hydropower projects on fish migration.

Asian carp, which was imported into the United States in the 1970s to clean algae in commercial ponds, spilled into the ...