EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/22/2019 | 9:00 AM - 9:15 AM | HELLBENDER SALAMANDERS AND FOUR FISH; SCIENCE, LITERATURE REVIEWS AND PERCEPTIONS | 250 CF
HELLBENDER SALAMANDERS AND FOUR FISH; SCIENCE, LITERATURE REVIEWS AND PERCEPTIONS
HELLBENDER SALAMANDER (CRYPTOBRANCHUS ALLEGANENSIS) POPULATION DECLINE HAS PARTIALLY BEEN ATTRIBUTED TO PREDATION BY FISH. MUCH SUPPORT FOR THIS HYPOTHESIS COMES FROM BEHAVIIORAL STUDIES INTERPRETING THE MOVEMENT OF OR LACK OF MOVEMENT OF HELLBENDERS OR FISH FOLLOWING A POTENTIAL STIMULUS. THESE BEHAVIORAL STUDIES USED INDIVIDUAL C. ALLEGANIENSIS FROM MISSOURI STREAMS WHERE WE HAVE CONDUCTED FIELD STUDIES FOR MANY YEARS. HEREIN, WE EXAMINE THE HYPOTHESIS THAT FOUR FISH SPECIES MAY CAUSE SUFFICIENT PREDATION OF HELLBENDERS TO CAUSE POPULATION DECLINE.THESE SPECIES INCLUDE TWO NATIVE SPECIES; THE OZARK SCULPIN COTTUS HYPESELURUS AND BANDED SCULPIN C. CAROLINAE AND TWO INTRODUCED SPECIES; RAINBOW TROUT ONCORHYCHUS MYKISS AND BROWN TROUT SALMO TRUTTA. WE REVIEWED DATA FROM OUR LABS FISH DIETS, POPULATION SAMPLES, AND FIELD DATA FROM FOUR C. A. BISHOPI STREAMS AND FROM FOUR C.A, ALLEGANIENSIS STREAMS (1968 - 2007) AND FROM SEVEN NON-MISSOURI STREAMS (1970 -2013).WE ALSO SURVEYED THE LITERATURE CONCERNING THE DIETS OF THESE FISH. WE FOUND NO EVIDENCE SUPPORTING THESE SPECIES AS HELLBENDER PREDATORS. EVEN IF THEY MAY BE OCCASIONAL PREDATORS, THERE IS NO SUPPORT FOR THEM CAUSING SIGNIFICANT POPULATION DECLINE.
- Fish
- Conservation
- Invasives
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Presenters/Authors
Max Nickerson
(), University of Florida, maxn@flmnh.ufl.edu;
ASHA DISCLOSURE:
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