August 31, 2018 — Recently, an argument over whether hatcheries are causing more harm than good has been heating up. The debate is nothing new. But an Alaska Department of Fish and Game study is about to take a step toward answering a question central to the debate: do hatchery fish that spawn with wild populations pose a threat to those stocks?
“You want to make two cuts: one to get at the heart and one to get at the otoliths,” Pete Rand told a group of new filed staff.
Rand is a research ecologist with the Prince William Sound Science Center, and he’s explaining how to sample pink salmon carcasses on the banks of Hartney Creek just outside of Cordova.
Rand picks up one of several pinks lined up on the rocks in front of him and cuts just behind its gills before using a pair of tweezers to tear off a tiny piece of its heart. Then, he cuts into the skull or “brain case” as he calls it and extracts two white otoliths or ear bones. They’re smaller than the head of a pin.
“I put my fingers in the eye socket and you basically want to take the top of the head off,” Rand said as his knife crunched into the decomposing skull of a pink salmon.
Read the full story at Alaska Public Media