Background. Frogs are generalist predators of a wide range of typically small prey items. But descriptions of dietary items regularly include other anurans, such that frogs are considered to be among the most important of anuran predators. However, the only existing hypothesis for the inclusion of anurans in the diet of post-metamorphic frogs postulates that it happens more often in bigger frog...

The effects produced by prefixation treatments on cells in metaphase from 10-day mouse fetuses and from several embryonic stages of the frog were investigated. The technical value of some of these pretreatments is noted. Pretreatment with isotonic solutions (both ionic and non-ionic in the case of the mouse, ionic only in the frog) generally produced a similar effect, viz., chromosomal swelling...

Research on the amphibian skin microbiota has focused on identifying bacterial taxa that deter a pathogenic chytrid fungus, and on describing patterns of microbiota variation. However, it remains unclear how environmental variation affects amphibian skin bacterial communities, and whether the overall functional diversity of the amphibian skin microbiota is associated to such variation. We sampl...

A purified cobra venom factor with C-inhibiting activity also promotes lysis of erythrocytes in fresh mammalian serum. Lysis-inducing activity of purified cobra venom factor was found in sera of lower vertebrates including the cyclostome hagfish and in invertebrates. Lysis-inducing activity was most effective with frog serum. Frog serum was found to be more hemolytic for E(s) in the presence of...

This paper proposes a combination of non-local spatial information and quantum-inspired shuffled frog leaping algorithm to detect underwater objects in sonar images. Specifically, for the first time, the problem of inappropriate filtering degree parameter which commonly occurs in non-local spatial information and seriously affects the denoising performance in sonar images, was solved with the m...

Several corticotropin-releasing factor (CRF) family genes have been identified in vertebrates. Mammals have four paralogous genes that encode CRF or the urocortins 1, 2, and 3. In teleost fishes, a CRF, urotensin I (a fish ortholog of mammalian urocortin 1) and urocortin 3 have been identified, suggesting that at least three of the four mammalian lineages arose in a common ancestor of modern bo...

The radiological evaluation of the anterolateral femoral head is an essential tool for the assessment of the cam type of femoroacetabular impingement. CT, MRI and frog lateral plain radiographs have all been suggested as imaging options for this type of lesion. The alpha angle is accepted as a reliable indicator of the cam type of impingement and may also be used as an assessment for the succes...

In order to better understand the complex nature of insulin-receptor interactions we have investigated insulin-promoted receptor down-regulation in frog and turkey erythrocytes. We have quantitatively analyzed the data for equilibrium insulin binding to frog erythrocytes before and after preincubation with insulin (down-regulation) or concanavalin A. Preincubation of frog erythrocytes with insu...

Abstract: Studying feeding habits is crucial to understand complex predator-prey interactions. Even though anurans play a fundamental role in the control of arthropods populations, diet several Neotropical species poorly known. We describe frequency and occurrence prey items their dry mass stomach contents Robber Frog Pristimantis paulodutrai north east state Bahia, Brazil. Based on 30 individu...

In “The Frog Prince”, published in The New Yorker 2014, Robert Coover uses the Brothers Grimm’s namesake tale as a backdrop to interrogate and subvert fairy conventions specifically with focus on gender roles. story dwells experiences of its eponymous protagonist not prince who is transformed into frog through evil magic but naïve which human being against his will. Opening an anonymous woman’s...