Results 11 to 20 of about 213,307 (205)

Reduced Offspring Viability Is Associated With Long-Term Stability of a Narrow Avian Hybrid Zone. [PDF]

Ecol Evol
We investigated hybrid viability in a tropical, avian hybrid zone governed by strong selection on male secondary sexual traits between the white‐collared manakin (Manacus candei) and golden‐collared manakin (M. vitellinus). We assessed putative hybrid fitness by investigating adult survival and hatching success along with a prospective selective ...
Long KM, Braun MJ, Muñoz Abrego A, Jaramillo O, Jones TM, Brawn JD.   +5 more
europepmc   +2 more sources

A Dominant Founder Lineage Has Possible Fitness Costs for the Endangered Mexican Grey Wolf. [PDF]

Mol Ecol
ABSTRACT The Mexican grey wolf (Canis lupus baileyi) is an endangered and genetically distinct subspecies of grey wolf adapted to the warm climates of the southwestern United States and Mexico. Following centuries of eradication efforts, Mexican grey wolves were protected under the Endangered Species Act in 1976, prompting an international ex situ ...
Loera Y, Khakoo M, Krueckeberg E, Nilsson IG, Wu Z, Dwire M, Adams J, Waits L, Oakleaf JK, Campbell ML, Dunnum JL, Cook JA, vonHoldt BM.   +12 more
europepmc   +2 more sources

Functional traits of young seedlings predict trade‐offs in seedling performance in three neotropical forests

Journal of Ecology, Volume 111, Issue 12, Page 2568-2582, December 2023., 2023
With strikingly consistent patterns across three tropical forests, the authors find strong evidence for the promise of functional traits to provide mechanistic links between seedling form and demographic performance. Abstract Understanding the mechanisms that promote the coexistence of hundreds of species over small areas in tropical forest remains a ...
Margaret R. Metz, S. Joseph Wright, Jess K. Zimmerman, Andrés Hernandéz, Samuel M. Smith, Nathan G. Swenson, M. Natalia Umaña, L. Renato Valencia, Ina Waring‐Enriquez, Mason Wordell, Milton Zambrano, Nancy C. Garwood   +11 more
wiley   +1 more source

Fitness consequences and ancestry loss in the Apennine brown bear after a simulated genetic rescue intervention

Conservation Biology, Volume 37, Issue 6, December 2023., 2023
Abstract Reduction in population size, with its predicted effects on population fitness, is the most alarming anthropogenic impact on endangered species. By introducing compatible individuals, genetic rescue (GR) is a promising but debated approach for reducing the genetic load unmasked by inbreeding and for restoring the fitness of declining ...
Francesco Maroso, Giada Padovani, Víctor Hugo Muñoz Mora, Francesco Giannelli, Emiliano Trucchi, Giorgio Bertorelle   +5 more
wiley   +1 more source

Berries and bullets: influence of food and mortality risk on grizzly bears in British Columbia Bayas y balas: influencia de la alimentación y el riesgo de mortalidad en los osos grizzly en la Columbia Británica Des baies et des balles: influence de l'alimentation et risques de mortalité chez les ours grizzlys de la Colombie‐Britannique

Wildlife Monographs, Volume 213, Issue 1, November 2023., 2023
We developed a spatialized surface for the primary food of grizzly bears in southeast British Columbia. After using this huckleberry patch layer to model habitat selection, fitness, and density, in a bottom‐up top‐down paradigm, we found that huckleberry patches near forestry roads contribute very little to fitness and density.
Michael F. Proctor, Clayton. T. Lamb, John Boulanger, A. Grant MacHutchon, Wayne F. Kasworm, David Paetkau, Cori L. Lausen, Eric C. Palm, Mark S. Boyce, Christopher Servheen   +9 more
wiley   +1 more source

Genetic diversity and IUCN Red List status

Conservation Biology, Volume 37, Issue 4, August 2023., 2023
Abstract The International Union for Conservation of Nature (IUCN) Red List is an important and widely used tool for conservation assessment. The IUCN uses information about a species’ range, population size, habitat quality and fragmentation levels, and trends in abundance to assess extinction risk.
Chloé Schmidt, Sean Hoban, Margaret Hunter, Ivan Paz‐Vinas, Colin J. Garroway   +4 more
wiley   +1 more source

Replicate contact zones suggest a limited role of plumage in reproductive isolation among subspecies of the variable seedeater (Sporophila corvina)

Molecular Ecology, Volume 32, Issue 13, Page 3586-3604, July 2023., 2023
Abstract After establishing secondary contact, recently diverged populations may remain reproductively isolated or may hybridize to a varying extent depending on factors such as hybrid fitness and the strength of assortative mating. Here, we used genomic and phenotypic data from three independent contact zones between subspecies of the variable ...
Diego Ocampo, Kevin Winker, Matthew J. Miller, Luis Sandoval, J. Albert C. Uy   +4 more
wiley   +1 more source

A GPU-based Evolution Strategy for Optic Disk Detection in Retinal Images [PDF]

, 2016
La ejecución paralela de aplicaciones usando unidades de procesamiento gráfico (gpu) ha ganado gran interés en la comunidad académica en los años recientes.
González-Calederón, Guillermo, Sánchez-Torres, Germán   +1 more
core   +2 more sources

El aula invertida y el método socrático en la enseñanza-aprendizaje de la gramática italiana en tiempos de COVID-19

Revista Electrónica Dr. Zoilo E. Marinello Vidaurreta, 2021
Fundamento: el estudio de lenguas extranjeras es vital en los profesionales que lo requieren para el desempeño de su profesión en otros lugares.
Carlos Alberto Chucla-Esquivel, Luis Díaz-Agüero   +1 more
doaj  

Aptitud física de adultos mayores: cambios basales generados por dos tipos de entrenamiento [PDF]

, 2015
Introducción. Preservar la aptitud física mediante la actividad física es crucial para mantener la autonomía y el buen estado de salud durante la edad adulta.
Aguirre Zuazua, Hugo, Cruz Castruita, Rosa María, Enríquez Reyna, María Cristina, Hernández Pacheco, Alejandro, Rangel Colmenero, Blanca Rocío   +4 more
core