Scientists survey Pacific Northwest salmon each year
2017-10-12 18:03:59   copyfrom:    hits:

Scientists survey Pacific Northwest salmon each year For the first time, some nets are coming up emptyUNITED STA

Scientists survey Pacific Northwest salmon each year. For the first time, some nets are coming up empty

UNITED STATES
Wednesday, October 11, 2017
 

Scientists have been hauling survey nets through the ocean off the coasts of Washington and Oregon for 20 years. But this is the first time some have come up empty.

“We were really worrying if there was something wrong with our equipment,” said David Huff, estuarine and ocean ecology program manager in the fish ecology division at NOAA Fisheries. “We have never hauled that net through the water looking for salmon or forage fish and not gotten a single salmon. Three times we pulled that net up, and there was not a thing in it. We looked at each other, like, ‘this is really different than anything we have ever seen.’

“It was alarming.”

Moving from Newport, Oregon, to the northern tip of Washington, anywhere from 25 to 40 nautical miles offshore last spring and summer, the survey team began catching fish — but not the ones usually in those waters. Instead, warm-water fish, such as mackerel — a predator of young salmon — and Pacific pompano and pyrozomes — normally associated with tropical seas — turned up in droves. Both deplete the plankton that salmon need to survive.

Source: The Seattle Times

hot search :

prev:Aquaculture spreads to North Andhra too
next:Cooke given 60 days to settle salmon net pen flaws

share: