Presentation is loading. Please wait.

Presentation is loading. Please wait.

White Sturgeon Mitigation and Restoration in The Columbia and Snake Rivers Upstream from Bonneville Dam Project 198605000 Washington Department of Fish.

Similar presentations


Presentation on theme: "White Sturgeon Mitigation and Restoration in The Columbia and Snake Rivers Upstream from Bonneville Dam Project 198605000 Washington Department of Fish."— Presentation transcript:

1 White Sturgeon Mitigation and Restoration in The Columbia and Snake Rivers Upstream from Bonneville Dam Project Washington Department of Fish and Wildlife

2 Stock Assessment & Fisheries Monitoring Stock Assessment & Fisheries Monitoring Recruitment Monitoring Recruitment Monitoring Juvenile Transplants Juvenile Transplants Hatchery Releases Hatchery Releases Maturation Cycle Maturation Cycle White Sturgeon Mitigation and Restoration

3 Stock Assessment & Fisheries Monitoring Total Length Year Sum Bonneville Reservoir ,40041,8003, , ,50033,0001, ,420 +2%-21%-68%-80%+95%-7% The Dalles Reservoir ,90013,5005,9001, , ,60010,2001, ,825 +9%-24%-81%-58%-50%-1% John Day Reservoir ,90012,8001, , ,20011,5001, , %-10%+2%-43%-48%+45%

4 Population trends in John Day Reservoir Total Length (inches) Year Sum , , ,4824,0451,00730, ,6681,0771,08729, ,7621, ,

5 Harvest Stock Assessment & Fisheries Monitoring

6 Recruitment Monitoring

7 Year The Dalles John Day 19942, , ,2575, , ,1634, ,2575, , , All15,25127,248 Juvenile Transplants 2005

8 Recaptures of Juvenile Sturgeon Transplants

9 Hatchery Releases Brood YearBrood Source Collected M : FRelease Date Release Location Release Number 1999 McNary/ Wanapum 6 : McNary 14 : McNary 23 : 4 Sep-02John Day McNary/ LCR 19 : 2 Apr-03Rock Island12, McNary/ LCR 19 : 2 Sep-03Rock Island8, McNary/ LCR 17 : 3 Sep-03Willamette40,000

10 Sex and Maturity Correct Classification of Sex & Maturity Using of Plasma Steroids 63% of the non-reproductive females 52% of the non-reproductive males 97% of the reproductive females 87% of the reproductive males

11 Males capable of spawning every year Majority of males are not spawning every year Females appear to be spawning every 2 to 5+ years with the majority of females displaying a 3+ to 5+ year cycle Maturation Cycle below Bonneville Dam

12 Update Snake River Stock Assessments Update Snake River Stock Assessments Adjust Capture Methods for Juvenile Transplants Adjust Capture Methods for Juvenile Transplants Regional Management Plan - Hatchery releases - Set population targets Regional Management Plan - Hatchery releases - Set population targets Future

13 White Sturgeon Mitigation and Restoration Project


Download ppt "White Sturgeon Mitigation and Restoration in The Columbia and Snake Rivers Upstream from Bonneville Dam Project 198605000 Washington Department of Fish."

Similar presentations


Ads by Google