EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/25/2021 | 2:00 PM - 3:30 PM | EFFECT OF A TREMATODE INFECTION ON GROWTH, REPRODUCTION, AND MORTALITY OF SHORTHEAD SCULPIN | Virtual Platform
EFFECT OF A TREMATODE INFECTION ON GROWTH, REPRODUCTION, AND MORTALITY OF SHORTHEAD SCULPIN
Shorthead sculpin (Cottus confusus) in Birch Creek, Idaho, were found infected with the trematode Euryhelmis cotti. Our objective was to evaluate if infection intensity influenced growth, reproduction, and mortality of sculpin at two sites in Birch Creek. Prevalence of trematode infection was 100% upstream compared to 32% downstream; intensity of infection was at least 15 times greater in sculpin upstream. von Bertalanffy growth models differed between sites; growth coefficient (K) was higher for sculpin at the upstream site. Gonadosomatic index for both males and females was higher for sculpin found upstream. Females upstream had more eggs/clutch compared to downstream. Annual mortality was higher upstream (A=57%; 95%CI: 52–62%) compared to downstream (A=42%; 95%CI: 38–46%). Consequently, the density of sculpin was lower upstream (13 fish/100 m2) compared to downstream (54 fish/100 m2). We found no evidence to suggest growth and reproduction of sculpin were influenced by infection of E. cotti, but rather were influenced primarily by density-dependent factors. Mortality was higher for sculpin upstream with high prevalence and intensity of infection. However, we do not know if higher mortality was a direct consequence of trematode infection or merely correlated with trematode infection.
- Stream
- Biological effects
- Vertebrates
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Presenters/Authors
Darby Byington
(), Indiana University of Pennsylvania, msncc@iup.edu;
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Eric Billman
(), Brigham Young University - Idaho, billmane@byui.edu;
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Jon Flinders
(), Idaho Department of Fish and Game, oclarkiiutah@gmail.com;
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