Coho Lake Rearing: Deer Lake/ Mist Cove
Overview of Operations
Stock 2.8 million coho fry annually from Hidden Falls
Rear to at least 20 grams by fall; two overwinter strategies: lake overwinter/net pen overwinter
Staff monitoring site every 3 weeks over winter
Spring smolt emigration in May/June Forced emigration of
net pen overwinter smolt
Volitional emigration of lake overwinter smolt
Winter Release Numbers/Monitoring
Released ~1.63 million 21.7 gram fingerlings into the west basin of the lake Lake 3.5 degrees Furthest release site to date Fyke net installed two days prior, no coho attempted outmigration Following release, heavy rains and high flow rates, still only 35 fish attempted
outmigration
Winter Release Site
Outlet Stream
Wavemasters December 2012 Release
January 2012 Release
December 2013 Release
Net Pen Overwinter Coho
Following the winter release splitting of two pens occurred First time doing a winter splitting at Deer Lake
Closed down camp and returned every three weeks for monitoring trips
As of the second monitoring trip: Currently holding ~1.18 million 20.1 gram fingerlings,
lost 1.8 grams since overwintering, lowest to date Overwinter mortality 0.48%, lowest to date for net pen
overwinter Lake Currently Frozen
Going into the Spring
Two sessions of forced emigration: pre-peek volitional emigration and post-peek volitional emigration
End of May/beginning of June: receive ~2.8 million ~0.9 gram fry from Hidden Falls
Rear to 20 gram size by fall 50/50 split: lake
overwinter/net pen overwinter for 2014/2015
•Open camp for season on the 4th of March •Raise pens and sample fish •Start feeding to regain weight lost over winter •Install weir early to monitor for any outmigrating fish before Mist Cove is operational
Thank you! Questions?