Estimation of 50% lethal doses from nuclear DNA contents and subsequent species sensitivity distribution analysis was performed to derive regional 5% hazardous doses (HD5) for major orders Anura (e.g., frogs) and Caudata (e.g., salamanders) of amphibians inhabiting Japan, Australia, France, Czech Republic, Canada and some US states, where nuclear power plants or uranium mines are located. The H...

IV. Methods of Analysis of Molecular Data A. Phylogenetic Analysis 1. Tree-Building Methods 2. Statistical Methods for Testing the Reliability of a Tree 3. Other Methods B. Phylogenetics versus Population Genetics V. Application of Molecular Methods in Amphibian Systematics A. Determination and Identification of Species and Species Hybrids B. Molecular Phylogeny of Living Amphibians 1. The Phyl...

Populasi anura (katak) di sesuatu ekosistem boleh menjadi penunjuk biologi bagi tahap kebersihan. yang rendah atau kadar kematian tinggi persekitaran menunjukkan kawasan tersebut adalah tidak stabil, contohnya akibat pencemaran air jangkitan parasit tinggi. Objektif kajian ini untuk menentukan kepelbagaian spesies anura, mengenal pasti taburan menjangkiti tasik dan Tanah Bencah Putrajaya hubung...

Registro documentado de Telmatobius culeus (Garman 1875) (Anura: Telmatobiidae), Laguna Ululunasa, Puno, Perú.

A strong visually determined white preference has been demonstrated for many Anura when they are given a choice of going toward stimuli of different intensity, or of turning toward or away from a light source (Pearse, 1910; Muntz, 19626). This preference is probably mediated by a system of 'on' fibres projecting to the diencephalon (Muntz, 1962 a, b) and dependent on the development of the gree...

immune genes of the major histocompatibility complex (mhc) are among the most polymorphic genes in the vertebrate genome. due to their polymorphic nature, they are often used to assess the adaptive genetic variability of natural populations. this study describes the first molecular characterization of 13 partial mhc class iib sequences from three european ranid frogs.  the utility of previously...

Phylogenetic reconstruction using the mitochondrial 16S marker shows the presence of a cryptic species of Cacosternum (Anura: Pyxicephalidae) from the eastern Great Escarpment of South Africa, supporting the Greater Maputaland-Pondoland-Albany region of vertebrate endemism. Bioacoustic and morphological characteristics, in conjunction with colouration differences, allow the description of this ...

Anura Abeyesinghe,1, ∗ Igor Devetak,2, † Patrick Hayden,3, ‡ and Andreas Winter4, § 1 Institute for Quantum Information, Physics Department, Caltech 103-33, Pasadena, CA 91125, USA 2 Electrical Engineering Department, University of Southern California Los Angeles, California 90089, USA 3 School of Computer Science, McGill University, Montreal, Quebec, H3A 2A7, Canada 4 Department of Mathematics...

Based on material collected from Rhinella cf. margaritifera (Laurenti) and Rhi. marina (Linnaeus) (Anura: Bufonidae) during a parasite survey of the herpetofauna of French Guiana, updated descriptions of Rhabdias androgyna Kloss, 1971 and R. fuelleborni Travassos, 1926 are presented. In addition to metrical data, which may overlap in closely related species, emphasis is placed on qualitative ch...

Most vertebrate retinas contain a single type of rod for scotopic vision and multiple types of cones for photopic and color vision. The retinas of certain amphibian species uniquely contain two types of rods: red rods, which express rhodopsin, and green rods, which express a blue-sensitive cone pigment (M1/SWS2 group). Spontaneous activation of rhodopsin induced by thermal isomerization of the ...