Amphibians, like other animals, generate corticosterone or cortisol glucocorticoid responses to stimuli perceived to be threatening. It is generally assumed that the corticosterone response of animals to capture and handling reflects the corticosterone response to stimuli such as the sight of a predator that are thought to be natural stressors. Fijian ground frogs (Platymantisvitiana) are preye...

Earlier studies of the diet of frogs indicate that most adult frogs are mainly insectivorous. Overall, frogs are viewed more as generalists than specialists in terms of their diet. However, despite earlier studies, there are still gaps in our knowledge regarding what frogs tend to eat and the degree of specialization. The aim of this study was to investigate the diet choice of frogs in a tropic...

Larvae of certain species of blowflies (Calliphoridae) can cause myiasis in frogs and toads, but there are few reports from North American amphibians. Of these, most are from toads (bufonids). In this study, we observe primary myiasis in a population of juvenile wood frogs, Rana sylvatica, collected on 22-23 August 2003, from southeastern Wisconsin and compare our observations with previous stu...

1318 Emerging Infectious Diseases • www.cdc.gov/eid • Vol. 15, No. 8, August 2009 Province enjoy eating frog meat, particularly from wild frogs, many frogs have been sold in the market, including a substantial number of wild frogs. The results of our survey show that infection of wild frogs with spargana reached 27.3% in western Guangdong Province; hence, consumption of wild frogs (and use as p...

reported by the Raffertys (10) in leopard frogs (Rana pipiens pipiens) that were maintained under crowded con ditions in the laboratory for periods ranging from 3 to 10 months. These incidences (20†" 50 %) are significantly higher than the incidence that Lucké(5) found in newly caught frogs (2.7 %) or in frogs that he maintained in the laboratory for a year or more (6.7 %). Subsequent studie...

Chytridiomycosis, caused by the fungus Batrachochytrium dendrobatidis (Bd), has resulted in the decline or extinction of approximately 200 frog species worldwide. It has been reported throughout much of North America, but its presence on Prince Edward Island (PEI), on the eastern coast of Canada, was unknown. To determine the presence and prevalence of Bd on PEI, skin swabs were collected from ...

Analyses of the diets frog species in a range different habitats have shown that these amphibians feed primarily on arthropods. In general, frogs are not selective predators, but may vary their capture mode along continuum between active and passive foraging. present study, we assessed diet two bromeliad-breeding genus Ololygon (= Scinax) through taxonomic functional identification (trophic gui...

The purpose of this study was to examine the acute and sub-acute effects of diazinon onhistopathological parameters of liver tissue and blood level of hepatic enzymes of male commonfrog (Rana ridibunda). Frogs were assigned to 9 groups (n=8, meaning 8 frogs in each group):control and treatment groups with 30, 60, 90 and 120 μg/L diazinon in water for one day or oneweek. Hepatic enzymes containi...

We have established ex situ assurance colonies of two endangered Panamanian harlequin frogs, Atelopus certus and Atelopus glyphus, but observed that males fought with each other when housed as a group. Housing frogs individually eliminated this problem, but created space constraints. To evaluate the potential stress effects from aggressive interactions when grouping frogs, we housed male frogs ...

African clawed frogs (Xenopus laevis) were exposed to one of eight nominal waterborne concentrations including 0, 0.1, 1.0, 10, or 25 microg/L atrazine, 0.005% ethanol (EtOH), or 0.1mg/L estradiol (E2) or dihydrotestosterone (DHT) containing 0.005% EtOH. Frogs were exposed from 72 h posthatch until 2--3 months postmetamorphosis via a 3-day static renewal exposure regimen. Atrazine at concentrat...