Parasites of hardhead (Mylopharodon conocephalus) and Sacramento pikeminnow (Ptychocheilus grandis) from the North Fork Feather River, Plumas and Butte Counties, California

Author

Dawn Alvarez

Graduation Date

2008

Document Type

Thesis

Program

Other

Program

Thesis (M.S.)--Humboldt State University, Natural Resources: Fisheries, 2008

Committee Chair Name

Gary Hendrickson

Committee Chair Affiliation

HSU Faculty or Staff

Keywords

California, Humboldt State University -- Theses -- Fisheries, Sacramento pikeminnow, Mylopharodon conocephalus, Parasites, Hardhead, Ptychocheilus grandis

Abstract

Hardhead (Mylopharodon conocephalus) and Sacramento pikeminnow (Ptychocheilus grandis) are endemic to California and are native to the Sacramento-San Joaquin system, Russian River, and Napa River. Very little study has been done on parasites of these two species. The objective of this study was to describe the parasites of hardhead and Sacramento pikeminnow in the North Fork Feather River in Plumas and Butte Counties, between its confluence with the East Branch of the North Fork Feather and Lake Oroville. Thirty-two hardhead and 14 Sacramento pikeminnow were examined for parasites. All Sacramento pikeminnow were infected, and all but one hardhead were infected. On average, Sacramento pikeminnow were infected with four parasites, and hardhead were infected with three parasites. I found six new host records for hardhead and four new host records for Sacramento pikeminnow. I found Trichodina/Paratrichodina species in Sacramento pikeminnow and two Myxobolus species in hardhead and Sacramento pikeminnow. Dactylogyrus californiensis and one unidentified monogenetic trematode were found on hardhead. I found Neascus of Ornithodiplostomum ptychocheilus in both hardhead and Sacramento pikeminnow. I found Edlintonia ptychocheila and Neoechinorhynchus rutili in hardhead. In addition, I found one parasite which has been previously recorded in hardhead and Sacramento pikeminnow, Lernaea cyprinacea. I also found three types of parasites which have been previously recorded in hardhead and Sacramento pikeminnow. "Black spot" Neascus species and unidentified larval nematodes were found in both hardhead and Sacramento pikeminnow, and unidentified proteocephalan plerocercoids were found in Sacramento pikeminnow.

https://scholarworks.calstate.edu/concern/theses/gq67jt68w

Share

 
COinS