ocr: NATIONAL GEOGRAPHIC EarthAlmanac Norway's Salmon Farms Leaking Like Sieves; Escapes Threaten Wild Fish Salmon farming aids wild salmon by reducing fish- ig pressure on wild stocks. But in Norway that benefit is drowning under an onslaught of farmed salmon thar are: escaping sea pens, such as these in Akra Fjord (below), and interhreeding with their wild cousins. When the latter rerurn from the. At- lantic to: spawn m their native nvers, in sone runs they are outnumbered four to one by the escapces, says Lars Petter Hansen of the Norwegian Insti- tute for Nature Rescarch. Interbreeding may dimi ...
