Nisqually fall chinook harvest

1,600 views

Published on

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
1,600
On SlideShare
0
From Embeds
0
Number of Embeds
339
Actions
Shares
0
Downloads
5
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Nisqually fall chinook harvest

  1. 1. SESSION 4<br />Nisqually Fall Chinook Harvest<br />
  2. 2. Nisqually River Fall Chinook Sport Fishery<br />Highly anticipated by Washington sport anglers. <br />One of largest hatchery Chinook returns in PS. <br />Popular due to location (JBLM).<br />Anglers are successful from mid August through late September. <br />Relatively few gear conflicts despite high sport effort. <br />Sport anglers are familiar with Treaty fishing schedule and plan accordingly. <br />Effort is concentrated within a mile of Hwy 99.<br />2<br />
  3. 3. Nisqually River Sport Fishing Regulations <br />1976; Two adult salmon per day July 1st – Jan 31st. <br />2006; Two adult salmon per day July 1st – Jan 31st, release “wild” adult Chinook. <br />2009; Three adult salmon per day July 1st – Jan 31st, two may be combination of pink, coho, or chum. Release “wild” adult Chinook. <br />2010; Three adult salmon per day July 1st – Jan 31st, two may be combination of pink, coho, or chum. Release all “wild” Chinook. <br />3<br />
  4. 4. Nisqually River Fall Chinook Hatchery Release Adipose Fin Clip Rates (1990-2008)<br />4<br />
  5. 5. Nisqually River Fall Chinook Catch Record Card (CRC) In-River Sport Harvest Estimates (1992-2009). <br />5<br />
  6. 6. Nisqually River Fall Chinook In-River Sport Fishing Exploitation Rates (1992-2004). <br />6<br />
  7. 7. Nisqually River Fall Chinook In-River Sport Fishing Exploitation Rates (2005-2009), Fishing Selectively. <br />7<br />
  8. 8. Treaty HarvestManagement for Recovery of Natural Chinook<br />Conflicting goals: Rebuilding and Harvest Goals<br />Current exploitation trends<br />Nisqually Treaty Impact on naturalChinook<br />Nisqually Harvest Management for Rebuilding of natural Chinook<br />Choices<br />Fish non-selective gear types <br />Achieve recovery goal<br />Not achieve community harvest goal<br />Fish Selective gear types <br />Achieve recovery goal<br />Achieve community harvest goal or exceed<br />Selective Fishing technology<br />Questions? <br />
  9. 9. Conflicting Goals: Harvest and Recovery <br />Long term Nisqually Community harvest goal: 10,000 to 15,000 Chinook: <br />32-48% treaty harvest rate if run size stays relatively constant.<br />Long term rebuilding exploitation rate goal on natural Chinook is 47%:<br />The Nisqually harvest rate on natural Chinook will be 20%(6,200 Chinook) in order to achieve our part in the total exploitation rate of 47% if fishing non-selective.<br />
  10. 10. Current Trends:<br />Puget Sound Sport mark selective fisheries: <br />Puget Sound sport fisheries impact on unmarked Nisqually Chinook has been cut from roughly 15% to just under 7%(2007 and 2008). <br />This is good news for sport fisheries because it allows for extended seasons and expanded areas.<br />
  11. 11.
  12. 12.
  13. 13. Unmarked Chinook escaping all fisheries<br />Canada<br />PS Sport<br />Extreme Terminal Catch (Nisqually in River Net)<br />
  14. 14. Nisqually Treaty Impact on Natural Chinook<br />Current interim rebuilding exploitation rate goal on natural Chinook: 65% <br />The Nisqually harvest rate of roughly 40% gets us to this exploitation goal.<br />Actual exploitation rate as of 2010: 72% <br />2010 Nisqually treaty harvest rate: 52%<br />
  15. 15. Harvest Management into the Future<br />2011: <br />Interim exploitation rate on natural Chinook: 65% <br />Treaty harvest rate around 40% <br />2012 and 2013: <br />Interim exploitation rate on natural Chinook: 56% <br />Treaty harvest rate will be around 29% <br />2014:<br />Rebuilding exploitation rate on natural Chinook: 47% <br />Treaty harvest rate needs to be 20% (6,200 Chinook non-selective). <br />Well below our community tribal harvest goal of 10,000-15,000. <br />Leaving so many hatchery fish uncaught will compound the issue of increased HORs on the spawning grounds.<br />
  16. 16. For the fishermen: Selective vs. Traditional<br />Potential outcome with selective gear: <br />Recover natural fish.<br />Harvest hatchery Chinook at 65% or more (20,000 hatchery Chinook) equating to well above our community harvest goal of 10,000-15,000.<br />Outcome with Current gear: <br />40% harvest rate equates to similar fishing schedule as last year. <br />The following two years fish an approximate schedule of 29% harvest rate:<br />6 - 24 hour periods in early August (6 days total). <br />In 2014 fishing an approximate harvest rate of 20% (6,200 Chinook):<br />~2 day fishery in early August.<br />
  17. 17. Recover the Natural/Harvest the Hatchery<br />95% of a very large Chinook run is hatchery, thanks to Clear Creek Hatchery. <br />If Nisqually fishermen can master selectively harvesting hatchery fish it is possible to obtain a higher harvest goal than 15,000 if:<br />Reduce release impacts on natural Chinook to 20%;<br />Meet our hatchery rack return; and <br />Provide in river sport opportunity. <br />When the natural run recovers our incidental harvest rate on the natural Chinook can go up. <br />
  18. 18. Hypothetical Catch #s with Different Harvest Rate Scenarios<br />
  19. 19. Technology:<br />Selective fishing is a technology that will allow treaty commercial harvesters the choice to catch a lot more Chinook into the future just as monofilament net and boat motors have done in the past.<br />Selective fishing techniques:<br />Floating trap with live boxes in traditional set net areas in the estuary?<br />Tangle set net?<br />Tangle drift net?<br />Traditional drift gill net?<br />Temporary wooden weirs with dip nets???<br />Hoop traps?<br />
  20. 20. Yelm Jim and George Leschi Fishing Traditional Technology.<br />
  21. 21. ?????????????Questions????????????<br />End of Session 4<br />

×