By Ann Robertson, NOAA Fisheries, on the Northwest Explorer
A new component of our Gulf of Alaska research this summer is the use of a respirometer on board the ship to measure the oxygen consumption (respiration rate) of fish. We had hoped to investigate the respiration rate of larval and age-0 rockfish. This is done by placing the fish in a closed chamber of oxygenated water, turning on a pump to recirculate the water, and watching the oxygen levels drop as the fish breathes. Unfortunately, only a few rockfish were collected, so we were only able to get a small amount of respirometry data. We were able to bring three small rockfish back to the lab in Juneau where we will continue our respirometry studies.
Our respirometer set up below deck on the Northwest Explorer. Plastic bags covering our electronic equipment prevented any moisture damage while at sea. |
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