Population Responses of Wood Frog (Rana Sylvatica) Tadpoles to Overwintered Bullfrog (Rana Catesbeiana) Tadpoles
نویسندگان
چکیده
منابع مشابه
Microhabitat Preferences of Bullfrog Tadpoles (Rana catesbeiana) of Different Ages
I experimentally investigated the habitat use preferences of bullfrog (Rana catesbeiana) tadpoles of different ages (early, first-year vs. late, second-year, premetamorphic) in the laboratory. Early tadpoles showed a preference for non-vegetated areas, whereas late tadpoles showed no preference. Early tadpoles were seen more often over small, gravel substrate as opposed to large rocks, whereas ...
متن کاملMercury bioaccumulation in green frog (Rana clamitans) and bullfrog (Rana catesbeiana) tadpoles from Acadia National Park, Maine, USA.
Mercury contamination in the northeastern United States, including Acadia National Park (ANP; ME, USA), is well documented and continues to be a public health issue of concern. Mercury contamination of wild amphibians has received little attention, however, despite reports of worldwide population declines. Here, we report total Hg and methyl Hg (MeHg) concentrations for water, sediment, and gre...
متن کاملThe tactile-stimulated startle response of tadpoles: acceleration performance and its relationship to the anatomy of wood frog (Rana sylvatica), bullfrog (Rana catesbeiana), and American toad (Bufo americanus) tadpoles.
I described the tactile-stimulated startle response (TSR) of wood frog (Rana sylvatica), bullfrog (Rana catesbeiana), and American toad (Bufo americanus) tadpoles. One purpose was to rank species in terms of maximum acceleration performance. Also, I tested whether anatomical indicators of performance potential were predictive of realized performance. TSRs were elicited in a laboratory setting, ...
متن کاملEffects of malathion on survival, growth, development, and equilibrium posture of bullfrog tadpoles (Rana catesbeiana).
Bullfrog (Rana catesbeiana) tadpoles were exposed to malathion in water in a 28-d static renewal test. The effects of malathion on survival, growth, development, and loss of equilibrium posture were determined. Survival was significantly decreased at malathion concentrations of 2,500 micrograms/L and higher. Development of tadpoles was delayed significantly by malathion exposure as indicated by...
متن کاملDopamine and background adaptation in bullfrog tadpoles (Rana catesbeiana): a pharmacological and histofluorescence study.
Bromocryptine, a dopamine agonist, effectively inhibited the black-adaptation of prometamorphic tadpoles of the bullfrog Rana catesbeiana. The melanophore index (MI) of bromocryptine-injected tadpoles was significantly lower than that of controls. Bromocryptine was also effective in lightening the skin color of the hypophysectomized tadpoles bearing a pituitary graft. When pimozide, a dopamine ...
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ژورنال
عنوان ژورنال: Journal of Herpetology
سال: 2007
ISSN: 0022-1511
DOI: 10.1670/0022-1511(2007)41[24:prowfr]2.0.co;2