source: hood canal citizens’ monitoring program source: hood canal diver observation program...
Post on 19-Dec-2015
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Sund Rock Rockfish
15
75
2/28/06 4/19/06 6/8/06 7/28/06 9/16/06 11/5/06 12/25/06 2/13/07
0-20 ft
20-50 ft
50 ft-maxdive depth
Sund RockWest Station
02468
10121416
2/28/06 4/19/06 6/8/06 7/28/06 9/16/06 11/5/06 12/25/06 2/13/07
Dis
so
lve
d O
xyg
en
(m
g/L
or
pp
m)
surface at 3ft bottom at 20ft bottom 40-60ft bottom 70-90ft
stress hypoxia
Sept. 19th-Reported Fish Kill& Unusual sightings
Source: Hood Canal Citizens’ Monitoring Program
Source: Hood Canal Diver Observation Program
STRESSAPPARENT
NON-STRESS
Data reflected the progression of the event by recording shifts in depth distributions and spatial abundance of fish populations.
Photo: Hood Canal Event Response Team
Photo: Hood Canal Event Response Team
Photo: Scott Boyd
Sund Rock•Many dead lingcod •Dying sea cucumbers & sunflower stars•Nearly all fish in shallow water (0-20 ft) 75 copper rockfish, sluggish 150+ perch Wolf eels lethargic
Sund Rock•Signs of stress continue•Most fish above 30 ft•At 150 ft, healthy-looking sea pens, crab, flatfish
Octopus Hole •Fish lethargic and shallow•Large school of rockfish at ~30 ft, moving slow.
Sund Rock•Almost all life above 20-30 ft.•Wolf eels out in the open.•Below 90 ft: some crab, flatfish
Sund Rock•much of what was struggling is now dead and dying•20 ft or less: 20-30 copper rockfish and 3-4 vermilion rockfish, 15-20 pile perch, 2 large schools of shiner perch, 11 striped perch, 100+ coonstripe shrimp, 4-5 red rock crab50-100 sea cucumbers dead or dying
Progression of Event – Southern Hood Canal
Stress
Mortality Lethargy
Fish shallow
Death & Decomposition
Photo: Janna Nichols
Photo: Janna Nichols
Photo: Janna Nichols
Mid Sep Oct 1 Mid Oct
Sund Rock•Little life below 32 ft
Sund Rock•Dead and dying animals in very shallow water
Distribution Changes
Stress & Mortality
Photo: Janna Nichols
Progression of Event – Northern Hood Canal
Pulali, Pinnacle•Good life and activity down to 80 fsw.
•Good life and activity but there are subtle indications that the low O2 is affecting the critters
Photo: Janna Nichols
Photo: Janna Nichols
Mid Sep Oct 1 Mid Oct Subtle changes
Pulali•Stressed sunflower stars, sea cucumbers, sea lemon
Rosies’s Ravine•Stressed anemones
Flagpole•Stressed wolf-eel
Good Activity, Normal Distribution
Some stress
Stressed Invertebrates
Good ActivityRosie’s RavineGood variety, life, and activity to 110 ft
Gobie Gardens, Black Point, The Pinnacle •lots of fish, good activity, nothing unusual
Normal Observations