Results 161 to 170 of about 1,434 (204)

Pharmacological activity of alkaloids from poison-dart frogs (dendrobatidae)

Toxicon, 1978
Abstract 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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Speciation with introgression: Phylogeography and systematics of the Ameerega petersi group (Dendrobatidae)

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, Michael S, Deutsch, Germán, Chávez, Carlos E, Almora, Jason L, Brown   +4 more
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New Species of Venezuelan Colostethus (Dendrobatidae)

Journal of Herpetology, 1985
TWO 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, 2020
Homing 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, Michelle A. Atehortua-Vallejo, Fernando Vargas-Salinas   +2 more
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Cranial features of dendrobatid larvae (Amphibia: Anura: Dendrobatidae)

Journal of Morphology, 1995
AbstractThe 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, 1994
A 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, H, Martin Garraffo, T F, Spande, C, Jaramillo, A, Stanley Rand   +4 more
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A NEW AMAZONIAN SPECIES OF CRYPTOPHYLLOBATES (ANURA: DENDROBATIDAE)

Herpetologica, 2005
A 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, 2009
The 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, Martha Patricia RamÍrez-Pinilla, VÍctor H. Serrano-Cardozo   +2 more
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Alkaloids of Neotropical Poison Frogs (Dendrobatidae)

1982
Poisons for arrows and blow darts have been derived from a wide spectrum of sources in both the plant and animal kingdoms. One unique source of such poisons is the skin secretion of certain brightly colored frogs native to the rain forests of Western Colombia. The Noanama and Embera Indians of this region undoubtedly used secretions from these frogs to
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Diet of Epipedobates flavopictus (Anura: Dendrobatidae) in a Neotropical Savanna

Journal of Herpetology, 2004
A central issue in comparative biology is identifying the relative importance of historical (phylogenetic) versus present-day (ecological) factors in shaping phenotypic traits of organisms. Herein, we investigate effects of sex, ontogeny, and season on diet of Epipedobates flavopictus, a species restricted to open landscapes in central Brazil. Based on
Graziela M. Biavati, Helga C. Wiederhecker, Guarino R. Colli   +2 more
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