Results 11 to 20 of about 2,982 (203)

Pinopsin Regulates Melatonin Production and Daily Locomotor Activity: Functional Insights From Gene-Edited Xenopus Tadpoles. [PDF]

J Pineal Res
ABSTRACT Circadian rhythm alignment depends on environmental light detection via opsins. Pinopsin, originally identified in the pineal organ of birds and later in amphibian pineal complex and eyes, may play a role in this process, though its function has not been genetically tested.
Heshami N, Romero RD, de Souza FSJ, Bertolesi GE, McFarlane S.   +4 more
europepmc   +2 more sources

A Review of the Scale and Sustainability of the Consumption and Trade of Anuran Species in Africa. [PDF]

Ecol Evol
ABSTRACT Within Africa, collection and trade of anurans is often recorded as single‐site case studies, making it difficult to accurately understand the scale of use, its livelihood importance, and impact on species. We conducted a systematic review to: compile literature on anuran uses in Africa; identify the species and ecoregions involved; and ...
Owusu-Gyamfi S, Coad L, Sackey HNK, Braithwaite Z, Attuquayefio DK, Ntiamoa-Baidu Y.   +5 more
europepmc   +2 more sources

Mitochondrial Phylogenomics and Genome Evolution in Anura: Insights From Structure and Gene Order Rearrangements. [PDF]

Ecol Evol
By analyzing 277 anuran mitochondrial genomes, this study reconstructs a robust phylogeny for frogs and toads, tracing their origins to the Triassic and major radiations to the Cretaceous‐Neogene. The research identifies 58 distinct gene arrangement patterns, providing a novel evolutionary framework.
He J, Li Z, Yang Q, Zhu M, Xue B, Hou Y, Yang G, Chen X, Chen Z.   +8 more
europepmc   +2 more sources

Quantifying exposure of amphibian species to heat waves, cold spells, and droughts. [PDF]

Conserv Biol
Abstract Globally, amphibians face severe threats, such as climate change and associated extreme events. Our goal was to quantify global amphibian exposure to 3 classes of extreme events: heat waves, cold spells, and droughts. We used the MERRA‐2 extreme climate events data and the standardized precipitation–evapotranspiration index database to ...
Twomey E, Sylvester F, Jourdan J, Hollert H, Schulte LM.   +4 more
europepmc   +2 more sources

Seasonal Analysis of the Male Reproductive Tract and Germ Cell Proliferation in Leptodactylus podicipinus (Anura). [PDF]

J Morphol
Box 1: Anuran reproductive morphology and dynamics are complex and diverse. Box 2: It is essential to comprehend reproductive morphology in a broad sense and simultaneously at different organizational levels. Box 3: The study characterizes the components of the male reproductive tract and assess testicular cell proliferation throughout the reproductive
Bordin ROA, Oliveira C, Domeniconi RF.
europepmc   +2 more sources

Urban-Wild Interface Diversity: A Comprehensive Checklist of Herpetofauna of Guayaquil, Ecuador. [PDF]

Ecol Evol
Amphibians and reptiles in Guayaquil comprise multiple taxonomic orders and occur across conservation areas, forest remnants, and urban parks, including several endemic species and numerous taxa with type localities in the city. Although most species are globally classified as Least Concern, discrepancies between global and national threat assessments ...
Cruz-García K, Zapata-Salvatierra N, Narváez AE, Pérez-Correa J.   +3 more
europepmc   +2 more sources

Amphibians and Reptiles Exhibit Different Ecological and Evolutionary Spatial Patterns in the Amazon Basin. [PDF]

Ecol Evol
This study investigates the spatial variability of ecological and evolutionary patterns in amphibian and reptile lineages within the Amazon Basin. Our findings highlight distinct diversity patterns across lineages and ecoregions. ABSTRACT Understanding spatial variability in ecological and evolutionary patterns is key to Amazonian biodiversity ...
López-Rojas JJ, Santiago DH, Solé M, Lourenço-de-Moraes R.   +3 more
europepmc   +2 more sources

Herpetofauna, Ponte de Pedra Hydroelectric Power Plant, states of Mato Grosso and Mato Grosso do Sul, Brazil [PDF]

Check List, 2009
This paper presents a check list of amphibians and reptiles of the area under influence of Ponte de Pedra hydroelectricpower plant on Correntes River (municipality of Sonora), between the Brazilian states of Mato Grosso do Sul and MatoGrosso.
Silva Jr., N. J., Cintra, C . E. D., Silva, H. L. R., Costa, M. C., Souza, C. A., Pachêco Jr, A. A., Gonçalves, F. A.   +6 more
doaj   +4 more sources

Morphology of the Cutaneous Poison and Mucous Glands in Amphibians with Particular Emphasis on Caecilians (Siphonops annulatus)

Toxins, 2021
Caecilians (order Gymnophiona) are apodan, snake-like amphibians, usually with fossorial habits, constituting one of the most unknown groups of terrestrial vertebrates. As in orders Anura (frogs, tree frogs and toads) and Caudata (salamanders and newts),
Beatriz Mauricio, Pedro Luiz Mailho-Fontana, Luciana Almeida Sato, Flavia Ferreira Barbosa, Renato Mancini Astray, Alexander Kupfer, Edmund D. Brodie, Carlos Jared, Marta Maria Antoniazzi   +8 more
doaj   +1 more source

Contributions to the knowledge of amphibians and reptiles from Volta Grande do Xingu, northern Brazil [PDF]

Brazilian Journal of Biology, 2015
The region of Volta Grande do Xingu River, in the state of Pará, presents several kinds of land use ranging from extensive cattle farming to agroforestry, and deforestation. Currently, the Belo Monte Hydroelectric Power Plant affects the region.
W. Vaz-Silva, RM. Oliveira, AFN. Gonzaga, KC. Pinto, FC. Poli, TM. Bilce, M. Penhacek, L. Wronski, JX. Martins, TG. Junqueira, LCC. Cesca, VY. Guimarães, RD. Pinheiro   +12 more
doaj   +3 more sources