Graduate Thesis Or Dissertation
 

Comparative behavior of the progeny of hatchery and wild steelhead trout (Salmo gairdneri)

Pubblico Deposited

Contenuto scaricabile

Scarica il pdf
https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/vh53wz82k

Descriptions

Attribute NameValues
Creator
Abstract
  • The objectives of this study were to determine whether changes in the selective pressures which occur in a hatchery could cause inherited modifications in the behavior of steelhead trout (Salmo gairdneri) that would affect their survival in the wild. Environmental effects on the behavior of the offspring of hatchery and wild adults were eliminated by raising the fish in a hatchery under identical conditions. Wild alevins survived better than hatchery alevins in artificial redds. The hatchery and wild alevins maintained similar positions in a rearing tank and had similar feeding behavior. Studies with an artificial stream channel indicated that hatchery fry were more aggressive, more attracted to cover, and may have had smaller territory requirements than wild fry. These modifications in the behavior of hatchery steelhead trout could affect their densities in streams. By raising fish in a more natural environment, genetic changes in the wild population may be minimized.
Resource Type
Date Available
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Academic Affiliation
Non-Academic Affiliation
Subject
Dichiarazione dei diritti
Publisher
Language
Digitization Specifications
  • File scanned at 300 ppi (Monochrome, 256 Grayscale, 24-bit Color) 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

Le relazioni

Parents:

This work has no parents.

In Collection:

Elementi

Thumbnail Titolo Data caricata Visibilità Azioni
file details BieberGlenF1977.pdf 2017-08-15 Pubblico Scaricare