Relationship Between Temperature and Ceratomyxa shasta–Induced Mortality In Klamath River Salmonids Public Deposited

http://ir.library.oregonstate.edu/concern/defaults/7w62f8676

This is the publisher’s final pdf. The published article is copyrighted by American Society of Parasitologists and can be found at:  http://amsocparasit.org/.

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Water temperature influences almost every biological and physiological process of salmon, including disease resistance. In the Klamath River (California), current thermal conditions are considered sub-optimal for juvenile salmon. In addition to borderline temperatures, these fish must contend with the myxozoan parasite Ceratomyxa shasta, a significant cause of juvenile salmonid mortality in this system. This paper presents 2 studies, conducted from 2007 to 2010, that examine thermal effects on C. shasta induced mortality in native Klamath River Chinook (Oncorhynchus tshawytscha) and coho (Oncorhynchus kisutch) salmon. In each study, fish were exposed to C. shasta in the Klamath River for 72 hr and then reared in the laboratory under temperature-controlled conditions. The first study analyzed data collected from a multi-year monitoring project to asses the influence of elevated temperatures on parasite-induced mortality during the spring/summer migration period. The second study compared disease progression in both species at 4 temperatures (13, 15, 18, and 21 C) representative of spring/summer migration conditions. Both studies demonstrated that elevated water temperatures consistently resulted in higher mortality and faster mean days to death. However, analysis of data from the multi-year monitoring showed that the magnitude of this effect varied among years and was more closely associated with parasite density than with temperature. Also, there was a difference in the timing of peak mortality between species; Chinook incurred high mortalities in 2008 and 2009, whereas coho was greatest in 2007 and 2008. As neither temperature nor parasite density can be easily manipulated, management strategies should focus on disrupting the overlap of this parasite and its obligate hosts to improve emigration success and survival of juvenile salmon in the Klamath River.
Resource Type
DOI
Date Available
Date Issued
Citation
  • Ray, R. A., Holt, R. A., & Bartholomew, J. L. (2012). Relationship between temperature and ceratomyxa shasta -induced mortality in klamath river salmonids. The Journal of Parasitology, 98(3), 520-526. doi: 10.1645/JP-GE-2737.1
Academic Affiliation
Series
Keyword
Rights Statement
Funding Statement (additional comments about funding)
Publisher
Language
Replaces
Additional Information
  • description.provenance : Submitted by Deborah Campbell (deborah.campbell@oregonstate.edu) on 2012-08-02T17:13:44Z No. of bitstreams: 1 RayRAdamFisheriesWildlifeRelationshipBetweenTemperature.pdf: 575605 bytes, checksum: 88aaaa26df35f18b22ea1ea43860e517 (MD5)
  • description.provenance : Approved for entry into archive by Deborah Campbell(deborah.campbell@oregonstate.edu) on 2012-08-02T17:56:44Z (GMT) No. of bitstreams: 1 RayRAdamFisheriesWildlifeRelationshipBetweenTemperature.pdf: 575605 bytes, checksum: 88aaaa26df35f18b22ea1ea43860e517 (MD5)
  • description.provenance : Made available in DSpace on 2012-08-02T17:56:44Z (GMT). No. of bitstreams: 1 RayRAdamFisheriesWildlifeRelationshipBetweenTemperature.pdf: 575605 bytes, checksum: 88aaaa26df35f18b22ea1ea43860e517 (MD5) Previous issue date: 2012-06

Relationships

In Administrative Set:
Last modified: 07/06/2017

Downloadable Content

Download PDF
Citations:

EndNote | Zotero | Mendeley

Items