Results 21 to 30 of about 2,259 (65)

Testosterone Reduces Growth and Hepatic IGF-1 mRNA in a Female-Larger Lizard, Sceloporus undulatus: Evidence of an Evolutionary Reversal in Growth Regulation

Integrative Organismal Biology, 2020
Synopsis Previous research has demonstrated that testosterone (T) can inhibit growth in female-larger species and stimulate growth in male-larger species, but the underlying mechanisms of this regulatory bipotentiality have not been investigated. In this
C. Duncan, W. Cohick, H. John-Alder
semanticscholar   +1 more source

Whole-chromosome fusions in the karyotype evolution of Sceloporus (Iguania, Reptilia) are more intense in sex chromosomes than autosomes

bioRxiv, 2020
There is a growing body of evidence that the common ancestor of vertebrates had a bimodal karyotype, i.e. consisting of large macrochromosomes and small microchromosomes. This type of karyotype organization is preserved in most reptiles. However, certain
A. Lisachov, K. Tishakova, S. Romanenko, A. S. Molodtseva, D. Prokopov, J. Pereira, M. Ferguson-Smith, Pavel M. Borodin, V. Trifonov   +8 more
semanticscholar   +1 more source

Phylogenomics of a rapid radiation: is chromosomal evolution linked to increased diversification in north american spiny lizards (Genus Sceloporus)?

BMC Evolutionary Biology, 2016
Resolving the short phylogenetic branches that result from rapid evolutionary diversification often requires large numbers of loci. We collected targeted sequence capture data from 585 nuclear loci (541 ultraconserved elements and 44 protein-coding genes)
A. Leaché, B. Banbury, Charles W. Linkem, A. N. de Oca   +3 more
semanticscholar   +1 more source

Population dynamics of three lizard species from the genus Sceloporus: short‐term changes in demographic parameters

Integrative Zoology, 2019
Most demographic studies focus on numerical changes that occur within populations across years. However, typically studies at an interannual scale do not provide information on the particular times of the year (particular months or seasons) when rates of
Selene Vargas-García, Víctor Argaez, Israel Solano‐Zavaleta, J. J. Zúñiga‐Vega   +3 more
semanticscholar   +1 more source

Climatic niche evolution in the viviparous Sceloporus torquatus group (Squamata: Phrynosomatidae)

PeerJ, 2019
The cold-climate hypothesis maintains that viviparity arose as a means to prevent increased egg mortality in nests owing to low temperatures, and this hypothesis represents the primary and most strongly supported explanation for the evolution of ...
Norberto Martínez‐Méndez, Omar Mejía, Jorge Ortega, F. R. Méndez-de la Cruz   +3 more
semanticscholar   +1 more source

Reproductive cycles and reproductive strategies among populations of the Rose‐bellied Lizard Sceloporus variabilis (Squamata: Phrynosomatidae) from central Mexico

Ecology and Evolution, 2016
Species with wide distribution, generally show variations in life history characteristics, which can be attributed to environmental causes. In this study, we analyzed the reproductive cycle and reproductive characteristics from three populations ...
Raciel Cruz‐Elizalde, A. Ramírez‐Bautista   +1 more
semanticscholar   +1 more source

Ontogenetic Variation in the Thermal Biology of Yarrow's Spiny Lizard, Sceloporus jarrovii

PLoS ONE, 2016
Climate change is rapidly altering the way current species interact with their environment to satisfy life-history demands. In areas anticipated to experience extreme warming, rising temperatures are expected to diminish population growth, due either to ...
Anthony L. Gilbert, Matthew S. Lattanzio
semanticscholar   +1 more source

Downsizing for downtown: limb lengths, toe lengths, and scale counts decrease with urbanization in western fence lizards (Sceloporus occidentalis)

Urban Ecosystems, 2019
Breanna J. Putman, M. Gasca, D. Blumstein, Gregory B. Pauly   +3 more
semanticscholar   +1 more source

Sex hormones and the development of sexual size dimorphism: 5α-dihydrotestosterone inhibits growth in a female-larger lizard (Sceloporus undulatus)

Journal of Experimental Biology, 2017
Nicholas B. Pollock, Stephanie Feigin, Marko Drazenovic, H. John-Alder   +3 more
semanticscholar   +1 more source

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Specific Habitat Elements (Refuges and Leaf Litter) Are Better Predictors of Sceloporus Lizards in Central Mexico Than General Human Disturbance

Herpetologica, 2023
: Human land transformation alters features of the landscape that may favor or eliminate biodiversity. Understanding habitat use among species in human-affected ecosystems can inform the management of habitats and conservation of species.
Jennifer Flores, Julio A. Rivera, J. J. Zúñiga‐Vega, H. Bateman, E. Martins   +4 more
semanticscholar   +1 more source