Results 161 to 170 of about 3,178 (206)
CORRELATED EVOLUTION OF CONSPICUOUS COLORATION AND BODY SIZE IN POISON FROGS (DENDROBATIDAE) [PDF]
Evolution; International Journal of Organic Evolution, 2003 Conspicuous coloration is often used in combination with chemical defenses to deter predators from attacking. Experimental studies have shown that the avoidance inducing effect of conspicuous prey coloration increases with increasing size of pattern elements and with increasing body size.
Mattias Hagman, Anders Forsman
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The advertisement call of Ameerega pulchripecta (Silverstone, 1976)(Anura, Dendrobatidae)
Zootaxa, 2016The name Ameerega picta was once used to denote a lineage of poison frogs (Dendrobatidae) distributed throughout most of the Amazon basin (Silverstone 1976); more recently, to describe a phenetic group involving at least 18 species, Lötters et al. (2007) pointed out that some of the lineages were indeed derived from the former A. picta. Among them, the
Costa-Campos, Carlos Eduardo +2 more
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Pharmacological activity of alkaloids from poison-dart frogs (dendrobatidae)
Toxicon, 1978Abstract Batrachotoxin, pumiliotoxin B, isodihydrohistrionicotoxin, pumiliotoxin C and gephyrotoxin represent five different classes of skin alkaloids from the dendrobatid poison dart frogs. In quinea pig ileum segments batrachotoxin and pumiliotoxin B caused rhythmic contractures which were prevented by tetrodotoxin.
M, Mensah-Dwumah, J W, Daly
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Molecular Phylogenetics and Evolution, 2019
The Tropical Andes contains exceptionally high diversity, much of it arising within the Quaternary period. The complex geology of the Andes and paleoclimate fluctuations within the Quaternary suggest complex speciation scenarios. This, in turn, has contributed to idiosyncratic speciation modes among shallowly diverged Amazonian taxa. Many relationships
Connor M, French +4 more
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The Tropical Andes contains exceptionally high diversity, much of it arising within the Quaternary period. The complex geology of the Andes and paleoclimate fluctuations within the Quaternary suggest complex speciation scenarios. This, in turn, has contributed to idiosyncratic speciation modes among shallowly diverged Amazonian taxa. Many relationships
Connor M, French +4 more
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New Species of Venezuelan Colostethus (Dendrobatidae)
Journal of Herpetology, 1985TWO new species of frogs of the genus Colostethus from the Venezuelan highlands are described. Colostethus duranti, from the paramo and subparamo La Culata, Estado Merida, is distinguished from all other Venezuelan Colostethus by the presence of a transversal sacral flap above the vent and by its white and light blue dotted belly.
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Homing in the Rubí Poison Frog Andinobates bombetes (Dendrobatidae)
Copeia, 2020Homing is a behavior in which an animal returns to a specific place after they have moved or migrated to a distant place. In anurans, most of our knowledge about homing comes from studies in temperate-region species with nocturnal activity and reproduction associated with ponds.
Luisa F. Arcila-Pérez +2 more
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Cranial features of dendrobatid larvae (Amphibia: Anura: Dendrobatidae)
Journal of Morphology, 1995AbstractThe larval neurocranium and visceral arches of seven dendrobatid species representing four genera are described, based on cleared‐and‐stained and serially sectioned specimens. A variety of characters is shared by all seven species. Larval features do not substantiate the assumption of close ranoid affinities of the Dendrobatidae.
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Dietary source for skin alkaloids of poison frogs (Dendrobatidae)?
Journal of Chemical Ecology, 1994A wide range of alkaloids, many of which are unknown elsewhere in nature, occur in skin of frogs. Major classes of such alkaloids in dendrobatid frogs are the batrachotoxins, pumiliotoxins, histrionicotoxins, gephyrotoxins, and decahydroquinolines. Such alkaloids are absent in skin of frogs (Dendrobates auratus) raised in Panama on wingless fruit flies
J W, Daly +4 more
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A NEW AMAZONIAN SPECIES OF CRYPTOPHYLLOBATES (ANURA: DENDROBATIDAE)
Herpetologica, 2005A new genus, Cryptophyllobates, was recently described for a species of dendrobatid that was originally described as Phyllobates azureiventris. One of the distinguishing characters of this frog is the presence of dorsolateral stripes that end on the posterior back above the thighs.
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Diet of the Andean Frog Ranitomeya virolinensis (Athesphatanura: Dendrobatidae)
Journal of Herpetology, 2009The effects of sex, ontogeny, and season on the diet of Ranitomeya virolinensis were studied over one year. The diet of this Andean species is composed mainly of small prey; the most important prey categories according to index of relative importance (IRI) were Acari, Formicidae, Holometabolous larvae, and Collembola. There were no differences in total
Mercedes Valderrama-Vernaza +2 more
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