Results 41 to 50 of about 2,507 (118)

Evolution of research on global amphibian declines

Conservation Biology, Volume 40, Issue 1, February 2026.
Abstract In the late 1980s, the scientific community became aware of severe, enigmatic amphibian population declines. These declines triggered a wave of research focused on quantifying their extent and identifying key drivers. We used text‐analysis techniques, including topic modeling and geoparsing, to examine the evolution of research focused on ...
Jordann Crawford‐Ash, Maldwyn John Evans, Tamilie Carvalho, Jodi J. L. Rowley, Trenton W. J. Garner, Erin Muths, Ben C. Scheele   +6 more
wiley   +1 more source

The frequency and importance of polyploidy in tropical rainforest tree radiations

New Phytologist, Volume 249, Issue 4, Page 2103-2114, February 2026.
Summary The presence of more than two copies of the genome in an organism, termed ‘polyploidy’, is a crucial force in plant evolution, generating genetic, phenotypic and ecological diversity. [Correction added on 22 January 2026, after first online publication: the preceding sentence has been corrected.] The Amazonian tree flora is the most species ...
Rowan J. Schley, Rosalía Piñeiro, James A. Nicholls, Michelle L. Gaynor, Gwilym P. Lewis, Flávia Fonseca Pezzini, Kyle G. Dexter, Catherine Kidner, R. Toby Pennington, Alex D. Twyford   +9 more
wiley   +1 more source

A new phylogeny of Anastrepha (Diptera: Tephritidae) based on nuclear loci obtained by phylogenomic methods

Systematic Entomology, Volume 51, Issue 1, January‐March 2026.
We present an extensive phylogenetic analysis, based on 293 nuclear loci and 728 individuals representing 237 species of Anastrepha, the largest and most economically important New World genus of Tephritidae. The analysis strongly supports the monophyly of most Anastrepha species groups, also revealing previously unknown relationships among species and
Allen L. Norrbom, Erick J. Rodriguez, Gary J. Steck, Brian K. Cassel, Raul Ruiz‐Arce, Alies Muller, Anielkoemar Gangadin, Marcoandre Savaris, Norma Nolazco, Henry Troya, Pablo Rodriguez, Yahaira Peñaloza Barria, Josué Madriz Picado, Pedro Alexander Rodriguez Clavijo, Matthew R. Moore, Marc Branham, Bruce D. Sutton, Tyler Raszick, Escher Cattle, Brian M. Wiegmann   +19 more
wiley   +1 more source

Radioterapia hipofraccionada para cáncer de próstata localizado: ¿Menos tiempo de tratamiento es mejor?

Oncología, 2021
Introducción: El hipofraccionamiento moderado (hRt) en cáncer de próstata, consisten en disminuir el tiempo total de tratamiento con radioterapia, lo que  mejora la adherencia terapéutica y optimiza recursos tecnológicos.
Andrés Imbaquingo Cabrera, Bárbara León Micheli, Nelson Segovia, Edwin Cevallos, Luis De los Reyes   +4 more
doaj   +1 more source

It is cool to be clear: Transparency induces a thermal cost in clearwing butterflies

Functional Ecology, Volume 39, Issue 9, Page 2452-2464, September 2025.
Read the free Plain Language Summary for this article on the Journal blog. Abstract In butterflies, wing transparency raises the question of potential costs for vital functions, such as thermoregulation. The thermal melanism hypothesis posits that darker colorations enable higher absorption of solar radiation, leading to the prediction that such ...
Violaine Ossola, Fabien Pottier, Charline Pinna, Katia Bougiouri, Aurélie Tournié, Anne Michelin, Christine Andraud, Doris Gomez, Marianne Elias   +8 more
wiley   +1 more source

IRRADIACIÓN SIMULTANEA DE CAMPOS CONTIGUOS CON HACES DE FOTONES

Anales (Asociación Física Argentina), 2013
Se analiza la uniformidad de dosis en todo el volumen de tratamiento cuando éste se irradia con un haz de fotones único o con haces contiguos. Los parámetros considerados son: energía del haz, distancia-fuente-superficie, tamaño del campo, incidencia ...
D. B. Feld, E. Singer
doaj  

Latitudinal variation rate of geomagnetic cutoff rigidity in the active Chilean convergent margin [PDF]

Annales Geophysicae, 2018
We present a different view of secular variation of the Earth's magnetic field, through the variations in the threshold rigidity known as the variation rate of geomagnetic cutoff rigidity (VRc).
E. G. Cordaro, E. G. Cordaro, P. Venegas, P. Venegas, D. Laroze, D. Laroze   +5 more
doaj   +1 more source

Spatiotemporal Dynamics of Non‐Ecological Speciation in Rubyspot Damselflies (Hetaerina spp.)

Molecular Ecology, Volume 34, Issue 12, June 2025.
ABSTRACT Non‐ecological speciation is a common mode of speciation, which occurs when allopatric lineages diverge in the absence of pronounced ecological differences. Yet, relative to other speciation mechanisms, non‐ecological speciation remains understudied.
C. Patterson, A. Brennan, H. Cowling, A. González‐Rodríguez, G. F. Grether, L. Mendoza Cuenca, M. Springer, Y. M. Vega‐Sánchez, J. Drury   +8 more
wiley   +1 more source

Ultraviolet radiation protection factors of livestock shade cloths for free‐range pigs

Veterinary Dermatology, Volume 35, Issue 6, Page 641-651, December 2024.
Background – Protection from solar ultraviolet radiation (UVR) is paramount in light‐skinned pig breeds such as Yorkshire or Landrace to avoid sunburn. Objectives – Determination of the UVR exposure of a pig and the sun protection abilities of shade cloths with different shade rates.
A. W. Schmalwieser, L. Bigelbach, S. Helletzgruber, H. Danhel, J. Heydenreich   +4 more
wiley   +1 more source

GRADIENTES Y PERFILES DE DOSIS EN INTERFASES Y CAMPOS CONFORMADOS UTILIZADOS EN RADIOTERAPIA

Anales (Asociación Física Argentina), 2013
En los tratamientos radiantes con equipos de teleterapia es importante conocer la distribución de dosis de radiación dentro del paciente. Se estudiaron en particular haces de fotones de sección irregular (campos irregulares) configurados con bloques ...
D B Feld, E Singer
doaj