thumbnail

Experimental infection of the endangered bonytail chub (Gila elegans) with the Asian fish tapeworm (Bothriocephalus acheilognathi): impacts on survival, growth, and condition

Canadian Journal of Zoology

By:
, , , , , and ORCID iD
https://doi.org/10.1139/Z06-126

Links

Abstract

Bothriocephalus acheilognathi Yamaguti, 1934, a tapeworm known to be pathogenic to some fish species, has become established in the endangered humpback chub (Gila cypha Miller, 1964) in Grand Canyon, USA, following the tapeworm’s introduction into the Colorado River system. The potential impact of this tapeworm on humpback chub was studied by exposing the closely related bonytail chub (Gila elegans Baird and Girard, 1853) to the parasite under a range of conditions that included potential stressors of humpback chub in their natal waters, such as abrupt temperature change and a limited food base. Survival of infected fish under low food rations was considerably lower than that of control fish, and mortality of infected fish began 20 days earlier. Growth of infected fish was significantly reduced, and negative changes in health condition indices were found. No significant negative impacts were revealed from the synergistic effects between temperature shock and infection. Bothriocephalus acheilognathi does present a potential threat to humpback chub in Grand Canyon and should be considered, along with conventional concerns involving altered flow regimes and predation, when management decisions are made concerning conservation of this endangered species.

Study Area

Additional publication details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Experimental infection of the endangered bonytail chub (Gila elegans) with the Asian fish tapeworm (Bothriocephalus acheilognathi): impacts on survival, growth, and condition
Series title:
Canadian Journal of Zoology
DOI:
10.1139/Z06-126
Volume:
84
Issue:
10
Year Published:
2006
Language:
English
Publisher:
NRC Research Press
Contributing office(s):
National Wildlife Health Center
Description:
12 p.
First page:
1383
Last page:
1394
Country:
United States
State:
Arizona
Other Geospatial:
Grand Canyon, Colorado River
Online Only (Y/N):
N
Additional Online Files (Y/N):
N