Date of Award

5-24-2019

Document Type

Thesis

Degree Name

Bachelor of Science (B.S.) in Biology and University Honors

Department

Biology

First Advisor

Susan Masta

Subjects

Haematoloechus, Frogs -- Parasites, Anura, Host-parasite relationships, Bullfrog -- Parasites, Odonata

DOI

10.15760/honors.733

Abstract

The prevalence and intensity of infection by lung flukes (Haematoloechus sp.) was examined by dissecting 1,590 American bullfrogs (Rana catesbeiana) collected between 2013 and 2018, from Conboy Lake National Wildlife Refuge, Washington. Overall infection, across all age classes, was 59.7% (n=1,580) and mean intensity was 17 (n=169; SD=19.3, range=1-166). A logistic regression model showed a significant relationship between infection and frog snout-to-vent length, gape, and collection year. Sex had a significant relationship to infection (χ2=7.31, df=1, P=0.007). Presence of odonates in the stomach was also significantly related to infection (χ2=22.49, df=1, P

Persistent Identifier

https://archives.pdx.edu/ds/psu/28863

Share

COinS