6 Works

Thermal tolerance in Drosophila: repercussions for distribution, community coexistence and responses to climate change

José M. Alruiz, Ignacio Peralta-Maraver, Francisco Bozinovic, Mauro Santos & Enrico L. Rezende
Here we combined controlled experiments and field surveys to determine if estimates of heat tolerance predict distributional ranges and phenology of different Drosophila species in southern South America. We contrasted thermal death time curves, which consider both magnitude and duration of the challenge to estimate heat tolerance, against the thermal range where populations are viable based on field surveys in an 8-yr longitudinal study. We observed a strong correspondence of the physiological limits, the thermal...

Magnesium and calcium isotope fractionation during microbial dolomite formation

Michael Tatzel , Adina Paytan , Samantha Carter , Daniel A. Frick , Francisca Martinez-Ruiz , Zach A. DiLoreto , Maria Dittrich , Tomaso R. R. Bontognali & Mónica Sanchez-Román
Microbial mediation is considered an important process for the formation of primary dolomite at ambient temperature. Yet, no structural, mineralogical, chemical or isotopic means exist to discern this mode of dolomite formation from secondary dolomite. To explore the utility of metal isotopes in allowing this distinction we characterize magnesium and calcium stable isotope ratios in primary (proto)dolomites from a modern hypersaline environment. Samples from the Khor Al-Adaid sabkhas in Qatar show consistent isotopic differences of...

Data from: Unwrapping broken tails: Biological and environmental correlates of predation pressure in limbless reptiles

Mario R. Moura, Henrique C. Costa, Arthur D. Abegg, Esmeralda Alaminos, Teddy Angarita-Sierra, Weverton S. Azevedo, Hugo Cabral, Priscila Carvalho, Sonia Cechin, Nathalie Citeli, Ângelo C. M. Dourado, André F. V. Duarte, Frederico G. R. França, Eliza M. X Freire, Paulo C. A. Garcia, Rafael Mol, Ricardo Montero, Antônio Moraes-Da-Silva, Daniel C. Passos, Paulo Passos, Renata Perez, Juan M. Pleguezuelos, Pedro Prado, Ana Lúcia C. Prudente, Raul F. D. Sales … & Jhonny J. M. Guedes
Studying species interactions in nature often requires elaborate logistics and intense fieldwork. The difficulties in such task might hinder our ability to answer questions on how biotic interactions change with the environment. Fortunately, a workaround to this problem lies within scientific collections. For some animals, the inspection of preserved specimens can reveal the scars of past antagonistic encounters, such as predation attempts. A common defensive behaviour that leaves scars on animals is autotomy, the loss...

Epistatic selection on a selfish Segregation Distorter supergene: drive, recombination, and genetic load

Beatriz Navarro-Dominguez, Ching-Ho Chang, Cara Brand, Christina Muirhead, Daven Presgraves & Amanda Larracuente
Meiotic drive supergenes are complexes of alleles at linked loci that together subvert Mendelian segregation resulting in preferential transmission. In males, the most common mechanism of drive involves the disruption of sperm bearing one of a pair of alternative alleles. While at least two loci are important for male drive- the driver and the target- linked modifiers can enhance drive, creating selection pressure to suppress recombination. In this work, we investigate the evolution and genomic...

Made-up mouths with preen oil reveal genetic and phenotypic conditions of starling nestlings

Juan José Soler, Ester Martínez-Renau, Manuel Azcárate-García, Cristina Ruiz-Castellano, José Martín & Manuel Martin-Vivaldi
Animal colouration are due to pigments, nanostructures, or to the cosmetic use of natural products, and plays a central role in social communication. The role of cosmetic colouration has traditionally been focussed on scenarios of sexual selection, but it could also be used in other contexts. Here, by using spotless starling (Sturnus unicolor) as a model system, we explore the possibility that nestlings cosmetically used their intensely yellow coloured uropygial secretion to signal their genetic...

Paid and hypothetical time preferences are the same: Lab, field and online evidence

Diego Andrés Jorrat, Pablo Brañas Garza, Antonio Espín & Angel Sánchez
The use of real decision-making incentives remains under debate after decades of economic experiments. In time preferences experiments involving future payments, real incentives are particularly problematic due to between-options differences in transaction costs, among other issues. What if hypothetical payments provide accurate data which, moreover, avoid transaction cost problems? In this paper, we test whether the use of hypothetical or one-out-of-ten-participants probabilistic—versus real—payments affects the elicitation of short-term and long-term discounting in a standard multiple...

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