In this video from Nature, learn how human behavior has created unnatural circumstances in the life cycle of salmon. Hatcheries raise and release over 100 million salmon every year, but less than one percent of the juveniles reproduce and return as adults due to man-made dangers. In response, the cornerstone of salmon recovery efforts has become "Juvenile Fish Transportation," an underground pipe with an opening that funnels fish over dams.
This video is available in both English and Spanish audio, along with corresponding closed captions.
Learn more about the Nature film Salmon:Running the Gauntlet.