Results 1 to 10 of about 306 (105)

Functional traits and phylogeny explain snake distribution in the world's largest dry forest ecoregion, the Gran Chaco. [PDF]

Ecol Evol, 2022
Chacoan snakes show a latitudinal pattern of distribution, with a marked verticality. Long‐tailed species richness and verticality increases in areas with high stratified habitats and stable temperature; and short‐tailed species richness and fossoriality is driven mainly by soil conditions, especially soils with fewer sand particles and less stratified
Cabral H, Guedes TB, Santana DJ.
europepmc   +2 more sources

The dispersal between Amazonia and Atlantic Forest during the Early Neogene revealed by the biogeography of the treefrog tribe Sphaenorhynchini (Anura, Hylidae). [PDF]

Ecol Evol, 2022
We suggest that phylogeographic patterns of Sphaenorhynchini have resulted from a combination of repeated range expansion and contraction cycles concurrent with Quaternary climate fluctuations and stochastic dispersal events between the Atlantic Forest and Amazonian Abstract The Amazonia and the Atlantic Forest, separated by the diagonal of open ...
Pereira EA, Ceron K, da Silva HR, Santana DJ.   +3 more
europepmc   +2 more sources

Exceptional Visual-Opsin Coexpression and Phenotypic Diversity in Outer-Retinal Photoreceptors of Caenophidian Snakes. [PDF]

J Comp Neurol
In snakes, profound differences in retinal architecture are observed between diurnal and nocturnal species. Additionally, in the rod‐dominated retinas of nocturnal snakes, coexpression of the cone opsins SWS1 and LWS in individual cones is common, while rhodopsin (RH1) is restricted to typical rods.
Hauzman E, Haverkamp S, Tashiro JH, Gügel IL, Torello-Viera NF, Guedes TB, Němec P, Casewell NR, Modahl CM, Oliveira ME, Prudente ALC, Mesquita DO, Ventura DF, Gower DJ.   +13 more
europepmc   +2 more sources

The combined role of dispersal and niche evolution in the diversification of Neotropical lizards. [PDF]

Ecol Evol, 2020
We integrated ecological and molecular data to investigate the relative roles of biogeographic events and niche evolution on the diversification of a lizard genus distributed in Neotropical rainforests and savannas. Our results suggest that dispersal and ecological divergence could have a more important role in Neotropical diversification than ...
Sheu Y, Zurano JP, Ribeiro-Junior MA, Ávila-Pires TC, Rodrigues MT, Colli GR, Werneck FP.   +6 more
europepmc   +2 more sources

Climate drives anuran breeding phenology in a continental perspective as revealed by citizen‐collected data

Diversity and Distributions, Volume 28, Issue 10, Page 2094-2109, October 2022., 2022
Abstract Aim As anuran reproduction is generally linked to the availability of water, frogs and toads are particularly sensitive to climate. We tested the effect of climate on anuran reproductive phenology and daily activity by analysing temporal patterns of reproductive behaviour based on citizen‐collected observations. Location Brazil.
Lucas Rodriguez Forti, Fábio Hepp, Juliana Macedo de Souza, Airan Protazio, Judit K. Szabo   +4 more
wiley   +1 more source

Efeitos do propofol administrado por via intracelomática em cágados-de-barbicha (Phrynops geoffroanus) Schweigger, 1812 [PDF]

Arquivo Brasileiro de Medicina Veterinária e Zootecnia, 2020
RESUMO O presente estudo avaliou a influência do regime hídrico sobre efeitos do propofol em Phrynops geoffroanus, bem como a qualidade da contenção farmacológica produzida. Foram utilizados 10 animais, anestesiados em dois momentos com propofol, na dose
A.L. Bragagnoli, J.G. Souza, K.L. Soares, S.A.R.S. Pereira, A.N. Carreiro, F.V. Henrique, P.I. Nóbrega Neto   +6 more
doaj   +1 more source

Osteology of the enigmatic threadsnake species Epictia unicolor and Trilepida guayaquilensis (Serpentes, Leptotyphlopidae) with generic insights

The Anatomical Record, Volume 304, Issue 10, Page 2183-2197, October 2021., 2021
Abstract Since the rearrangement of all leptotyphlopid species previously known as “Leptotyphlops” in Adalsteinsson et al. (2009)'s paper, several taxa have remained untested regarding their generic identity and have been assigned to different genera based on phenotypic data or, in some cases, without any clear justification.
Claudia Koch, Angele Martins, Mitali Joshi, Roberta R. Pinto, Paulo Passos   +4 more
wiley   +1 more source

Habitat amount and ambient temperature dictate patterns of anuran diversity along a subtropical elevational gradient

Diversity and Distributions, Volume 27, Issue 2, Page 344-359, February 2021., 2021
Abstract Aim Patterns of diversity along elevational gradients are driven by species characteristics but remain poorly understood. Filling this gap is imperative given the deteriorating conservation status of anurans worldwide. Here, we examine frog diversity and species composition along a sharp subtropical elevational gradient and assess the degree ...
Vítor Carvalho‐Rocha, Carlos A. Peres, Selvino Neckel‐Oliveira, Xuan Liu   +3 more
wiley   +1 more source

Caracterização dos répteis descartados por mantenedores particulares e entregues ao Centro de Conservação e Manejo de Répteis e Anfíbios – RAN

Revista de Biologia Neotropical, 2008
O interesse das pessoas em manter animais silvestres como animais de estimação é mais um incentivo à prática do comércio predatório e indiscriminado da fauna silvestre.
Valéria Leão Souza, Tatiane Mendonça Santos, Alfredo Palau Peña, Vera Lúcia Ferreira Luz, Isaías José Reis   +4 more
doaj   +1 more source

Osteologia do dermatocrânio e mandíbula de Iguana iguana iguana (Squamata: Iguanidae)

Revista de Biologia Neotropical, 2016
O esqueleto dos animais fornece dados anatômicos que auxiliam no entendimento de suas características evolutivas. Objetivando subsidiar o conhecimento morfológico dos répteis, fornecemos uma descrição do dermatocrânio e mandíbula de Iguana iguana iguana ...
Fabiano Campos Lima, Kleber Fernando Pereira, Antonio Sebben   +2 more
doaj   +1 more source