Adult Recoveries of Volitionally and Forced‐Released Juvenile Coho Salmon

Appleby, Andrew E.; Tipping, Jack M.; Seidel, Paul R.

doi:10.1577/a03-010.1

N American J Aquac

2004

DOI: 10.1577/a03-010.1

|View full text |Cite

Adult Recoveries of Volitionally and Forced‐Released Juvenile Coho Salmon

Andrew E. Appleby

Jack M. Tipping

Paul R. Seidel

Abstract: Test groups of coded‐wire‐tagged yearling coho salmon Oncorhynchus kisutch were either volitionally released or forcibly released for 3 years at two hatcheries. Results for the two release methods showed similar survivals for age‐2 males (jacks) or age‐3 fish. We suggest that volitional release could have benefits in feed savings and allow limited water to be redirected in the hatchery.

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2007

2015

Publication Types

Select...

Article4

Relationship

Self Cite0

Independent4

Authors

Journals

Cited by 4 publications

(2 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Evenson and Ewing (1992) even removed nonmigrating steelhead from the volitional groups so they were not counted as fish released, and adult returns were still significantly greater for forcibly released fish. Appleby et al (2004) observed similar adult return rates between the two release methods for coho salmon O. kisutch.…”

supporting

confidence: 51%

Adult Returns of Volitionally Migrating and Pond‐Sedentary Hatchery‐Reared Steelhead Smolts

Tipping

2007

N American J Aquac

View full text Add to dashboard Cite

Adult return rates of steelhead Oncorhynchus mykiss that volitionally emigrated as smolts were compared with those of pond-sedentary juveniles forced from a raceway after being allowed 6 weeks of volitional migration opportunity. In 5 years of releases, an average of 7.2% of the smolts remained in the raceway after the volitional migration opportunity. Adult returns of volitional and pond-sedentary fish were statistically similar in all but 1 year of release; in that year, pond-sedentary returns were significantly greater than those from the volitional release. The results suggest that pond-sedentary juvenile steelhead should not be destroyed or placed in nonanadromous waters out of concern for poor adult survival.*

show abstract

supporting

confidence: 51%

Adult Returns of Volitionally Migrating and Pond‐Sedentary Hatchery‐Reared Steelhead Smolts

Tipping

2007

N American J Aquac

View full text Add to dashboard Cite

show abstract

“…2011), while others have shown a significant advantage of FR (Evenson and Ewing 1992). A study conducted with Coho Salmon O. kisutch also found no significant survival advantage between FR and VR methodologies (Appleby et al 2004). However, research that has examined the survival differences between release methodologies for spring Chinook Salmon is sparse.…”

mentioning

confidence: 98%

Adult Survival of Hatchery Spring Chinook Salmon Released Volitionally or Forcibly as Juveniles

2015

View full text Add to dashboard Cite

Hatchery managers seek to maximize production and survival in a cost‐effective manner while adapting to hatchery reform recommendations. Evaluation of changing hatchery rearing practices is necessary under an adaptive management paradigm. In this study, we compared the adult survival of hatchery‐reared spring Chinook Salmon Oncorhynchus tshawytscha released volitionally or forcibly from an acclimation facility in the upper Wenatchee River basin from brood years 2003–2005. In all study years, smolt‐to‐adult survival rates were higher for forced releases, and significant differences were observed in brood years 2004 and 2005. To optimize hatchery fish performance, hatchery managers should evaluate their smolt release methodology. However, any proposed changes in hatchery release methodology should also take into account variability in survival within the migration corridor and a risk assessment such that any realized increase in survival is not offset by increased risk to natural populations.

show abstract

Juvenile Steelhead Release Strategies: A Comparison of Volitional‐ and Forced‐Release Practices

et al. 2009

View full text Add to dashboard Cite

In 2004 and 2005, steelhead (anadromous rainbow trout Oncorhynchus mykiss) reared at Winthrop National Fish Hatchery (Winthrop, Washington) were tagged with passive integrated transponders and subjected to a volitional or forced release. Gill Na+, K+‐ATPase (NKA) activity, body size, condition factor (K), travel time, and apparent survival were compared between volitional migrants (VMs), forced‐release migrants (FRMs), and volitional‐release nonmigrants (VNMs). Gill NKA activity and body size were similar between VNM, VM, and FRM groups, but K varied by date and migrant group. However, by the end of the volitional‐release period, all three groups had similar K. The VNMs consistently demonstrated lower apparent survival to McNary Dam on the Columbia River than did the VM and FRM groups, which had three to eight times greater survival than did VNMs. Volitional migrants had higher apparent survival to McNary Dam than did FRMs in 2005; however, apparent survival was similar between the two groups in 2004. Apparent survival between McNary and John Day dams was similar among all three groups in 2004 and 2005. Median travel time to McNary Dam was not consistently different among groups and differed between years. By combining results from VNMs and VMs, we were able to compare apparent survival between volitional‐ and forced‐release strategies. In 2004, the forced‐release group had a significantly higher apparent survival to McNary Dam than did volitionally released fish, whereas there was no difference in apparent survival between the two release strategies in 2005. There was little evidence for a survival‐, size‐, or physiology‐related advantage of volitionally released fish over forced‐release fish. The consistently lower apparent survival of VNMs does support the use of volitional release to screen fish that will fail to migrate downstream due either to low survival or residualization in the natal stream.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Adult Recoveries of Volitionally and Forced‐Released Juvenile Coho Salmon

Cited by 4 publications

References 9 publications

Adult Returns of Volitionally Migrating and Pond‐Sedentary Hatchery‐Reared Steelhead Smolts

Adult Returns of Volitionally Migrating and Pond‐Sedentary Hatchery‐Reared Steelhead Smolts

Adult Survival of Hatchery Spring Chinook Salmon Released Volitionally or Forcibly as Juveniles

Juvenile Steelhead Release Strategies: A Comparison of Volitional‐ and Forced‐Release Practices

Contact Info

Product

Resources

About