Game Fishing Forum banner
1 - 5 of 5 Posts

·
Registered
Joined
·
9 Posts
Discussion Starter · #1 ·
I have heard a few rumors regarding lower springer numbers due to a larger ocean dead zone. I have seen this in Oregon. Has anyone heard anything about this issue? Has the State put out a statement regarding this for Washington numbers?

Ag teacher
 

·
Registered
Joined
·
2,037 Posts
Depends on who you talk to, this report was given the same date as the second report. "TRAPPER"

Oct. 2006
This year the zone is stretching longer and thicker than it ever has before, possibly reaching into the waters off Washington State.
"This is the first year we've seen the dead zone expand," said Jane Lubchenco, a marine biologist at Oregon State University in Corvallis.
This year's zone blankets approximately 70 miles (113 kilometers) of the central Oregon coast and may extend another 170 miles (274 kilometers) into Washington waters (map of Oregon).

In some spots the zone is 98 feet (30 meters) thick, swallowing nearly half of the water column.

In both states people have reported dead rockfish and other bottom fish on beaches. Fishers have found their crab pots packed with dead crabs.

"These are the biological indicators that we've had that something [unusual] is going on down below, out of sight," said Liam Antrim, a resource protection specialist at the Olympic Coast National Marine Sanctuary in Washington.


Oct. 2006
GRANTS PASS, Ore. -- An ocean dead zone off Oregon that killed fish, crabs and sea worms in an area bigger than Rhode Island last summer lasted nearly three times longer than any of its predecessors before dissipating with autumn's change in the weather, scientists said Monday.
This year's dead zone off Oregon ran for 17 weeks, compared to the previous high of six weeks in 2004, and saw oxygen readings near zero that left the ocean bottom littered with dead crabs, sea stars and sea anemones. This is the fifth straight year the dead zone returned. It covered 70 miles of the central Oregon Coast and there are indications a dead zone also formed off southern Washington.
In this 2004 file photo provided by Oregon State University, Dungeness crabs are washed ashore along the Oregon coastline. A dead zone, which has reappeared off the Oregon Coast for the past five years, that killed fish, crabs and sea worms in an area the size of Rhode Island has dissipated with autumn's change in the weather, as expected. (AP Photo/Oregon State University, Elizabeth Gates) (Elizabeth Gates - AP)
Southerly winds in recent weeks have flushed out the oxygen-depleted waters that were stuck along the Continental Shelf off the central Oregon Coast, and put an end to the condition known as ocean upwelling that triggered the dead zone, Jack Barth, professor of physical oceanography at Oregon State University, said from Corvallis.
 

·
Registered
Joined
·
2,359 Posts
both states people have reported dead rockfish and other bottom fish on beaches. Fishers have found their crab pots packed with dead crabs.


How do dead crabs get into the pots?
 

·
Registered
Joined
·
330 Posts
THE TRAPPER said:
Southerly winds in recent weeks have flushed out the oxygen-depleted waters that were stuck along the Continental Shelf off the central Oregon Coast, and put an end to the condition known as ocean upwelling that triggered the dead zone, Jack Barth, professor of physical oceanography at Oregon State University, said from Corvallis.
I thought Ocean upwellings were good? I thought that was what brings the nutrients to the surface and provides for the bottom of the food chain? What exactly is a dead zone then? Just water with low oxygen content?
 

·
Registered
Joined
·
4,033 Posts
I think you find most of the oxygen near the surface, from the water/air interaction that happens. Deep down, not a lot of oxygen, so when a sudden amount of this oxygen-less water comes up, it creates this dead zone. Basically, if its a one time upwelling, it should equalize, but I'm sure even if it was just a one time massive upwelling, it would take a while for the currents to mix the water around to get the dissolved oxygen into the oxygen-less water.
 
1 - 5 of 5 Posts
Top