Graduate Thesis Or Dissertation
 

The influence of fall-spawning salmon on growth and production of juvenile coho salmon rearing in beaver ponds on the Copper River Delta, Alaska

Public Deposited

Contenu téléchargeable

Télécharger le fichier PDF
https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/7w62fc73z

Descriptions

Attribute NameValues
Creator
Abstract
  • This thesis examined the influence of fall-spawning coho salmon on the density, growth rate, body condition, and survival to outmigration of juvenile coho salmon rearing in beaver ponds on the Copper River Delta, Alaska. During the fall of 1999 and 2000 fish rearing in ponds that received spawning salmon were compared to ponds that did not receive spawners, and to ponds that were artificially enriched with salmon carcasses and eggs. Juvenile coho salmon responded variably to fall-spawning salmon. There were no consistent patterns associated with the two naturally occurring pond types (spawning vs no spawning). In some ponds, fall-spawning salmon increased growth rates and improved the body condition of juvenile coho salmon. Enrichment with salmon carcasses and eggs significantly increased growth rates of fish in non-spawning ponds. For some ponds, the relative influence of spawning and enrichment on body condition depended on fish size. There was no evidence that the influence of fall-spawning resulted in greater smolt production. Fall-spawning salmon provide important food resources that can benefit juvenile coho salmon rearing in beaver ponds on the Copper River Delta. However, other factors such as nutrients from riparian vegetation and catchment characteristics that control hydrology and thermal regimes are important to coho salmon smolt production.
License
Resource Type
Date Available
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Committee Member
Academic Affiliation
Non-Academic Affiliation
Subject
Déclaration de droits
Publisher
Peer Reviewed
Language
Digitization Specifications
  • File scanned at 300 ppi (Monochrome) using Capture Perfect 3.0.82 on a Canon DR-9080C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
Replaces

Des relations

Parents:

This work has no parents.

Dans Collection:

Articles

La vignette Titre Date de téléchargement Visibilité actes
file details LangDirkW2004.pdf 2017-08-19 Public Télécharger