The bullfrog, Rana catesbeiana Shaw, in the lower Colorado River, Arizona-California

Author(s)
Clarkson, Robert W. and James C. deVos, Jr.
Year
Article Title
The bullfrog, Rana catesbeiana Shaw, in the lower Colorado River, Arizona-California
Volume
20
Pages
42-49
Start Page Number
42
Final Page
49
Review

Datapoints

Displaying 1 - 7 of 7 datapoints.
Species: Bullfrog (Lithobates catesbeianus formerly Rana catesbeiana)
Exposure Endpoint Type Endpoint Description Endpoint Value Sample Size Units Life Cycle Stage Specific Location Range Type
Population Density mean density measured on both banks of river 9.1 3 visual counts #/linear river km Adult lower Colorado River between Laguna and Morelos Dams Exposure Factor Datasets
Dietary Composition % frequency of occurence in stomach contents crayfish (24%), wolf spiders (36%), long horned earwigs (20%), sowbugs (25%), german cockroaches (14%), crickets (16%), vascular plants (36%), inorganic material (12%), other animals (10%) 100 Adult lower Colorado River between Laguna and Morelos Dams Exposure Factor Datasets
Time of Mating/ Laying breeding season early Apr. (begin), late Apr. - early May and late May - early June (peaks), July (end) 100 Adult lower Colorado River between Laguna and Morelos Dams Exposure Factor Datasets
Age at Fledging, Metamorphosis, Weaning time to metamorphosis from first breeding clutch Not Reported mo Tadpole lower Colorado River between Laguna and Morelos Dams 3 - 6 Exposure Factor Datasets
Time of Fledging or Metamorphosis metamorphosis period for first breeding clutch Aug. - Oct. Not Reported Tadpole lower Colorado River between Laguna and Morelos Dams Exposure Factor Datasets
Time of Fledging or Metamorphosis time to metamorphosis for second clutch Aug. - Oct. or Mar. - Apr. of following yr. Not Reported Tadpole lower Colorado River between Laguna and Morelos Dams Exposure Factor Datasets
Age at Sexual Maturity Not Reported yr Adult lower Colorado River between Laguna and Morelos Dams 1 - 2 Exposure Factor Datasets

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