2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
6/08/2017 | 9:15 AM - 9:30 AM | LIFE-HISTORY AND POPULATION BIOLOGY OF CRAYFISH IN THREE SINUOUS RILLS IN WEST CENTRAL GEORGIA | 305A
LIFE-HISTORY AND POPULATION BIOLOGY OF CRAYFISH IN THREE SINUOUS RILLS IN WEST CENTRAL GEORGIA
I sampled stream-dwelling crayfish at monthly intervals over a 3-year period in three headwater streams (order 1-2) originating in Franklin D. Roosevelt (Georgia) state park. Crayfish were collected by dip nets and modified minnow traps in contrasting habitats: gravel/rocky riffles; gravel/sandy runs; and gravel/sandy pools. Physical parameters measured at each collection time were temperature and dissolved oxygen, while pH, hardness, alkalinity, ammonia nitrate, and chloride were measured 4 times per year. Crayfish carapace length and width, and right chela length and width were recorded and crayfish sex and crayfish injury (e.g., chela autonomy) were noted. I collected over 3,500 crayfishes consisting of three species, Cambarus howardi (GA state-listed as threatened), C. striatus, and Procambarus spiculifer. Life-history attributes such as timing of reproduction and free swimming juveniles will be discussed. As data is still being collected, information on sex ratios, sexual dimorphism, fecundity, and frequency of injury is being compiled and will be presented. Recognizing the distinct patterns of these crayfish life history strategies will improve understanding of the biology and ecology of these understudied organisms.
- S12 Challenges, insights, and opportunities in crayfish conservation and ecology
- S12 Challenges, insights, and opportunities in crayfish conservation and ecology
- S12 Challenges, insights, and opportunities in crayfish conservation and ecology
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Presenters/Authors
Chester R. Figiel, Jr.
(), U.S. Fish and Wildlife Service, chester_figiel@fws.gov;
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Nonfinancial -