Results 41 to 50 of about 501 (134)

Sex‐Specific Variation in Foraging Behavior is Related to Telomere Length in a Long‐Lived Seabird

Ecology and Evolution, Volume 14, Issue 12, December 2024.
Foraging during breeding is energetically demanding, intimately linked to breeding investment, and possibly constrained by individual condition. Telomere length, the protective nucleoproteins located at the ends of the chromosomes, is considered a trait reflecting somatic maintenance and individual quality. We found that brown booby females with longer
Mauricio Guillen‐Parra, Rocio Barcenas‐Flores, Alberto Velando, Anne Wiley, Bibiana Montoya, Roxana Torres   +5 more
wiley   +1 more source

A methodological workflow for quantitative colouration and colour pattern comparison reveals taxonomic and habitat‐level differences in the polymorphic fire salamander (Salamandra salamandra)

Journal of Zoology, Volume 324, Issue 1, Page 34-49, September 2024.
In this study, we use the urodele Salamandra salamandra as a study model to apply an analytical approach for extracting and quantifying colour proportions and patterns variation, using the recently developed R packages patternize and recolorize, to accurately describe and compare colour distribution at both taxonomic and habitat levels.
L. Alarcón‐Ríos, D. Álvarez, G. Velo‐Antón   +2 more
wiley   +1 more source

A plurality of morphological characters need not equate with phylogenetic accuracy: A rare genomic change refutes the placement of Solifugae and Pseudoscorpiones in Haplocnemata

Evolution &Development, Volume 26, Issue 4, July 2024.
Developmental transcriptomic data support an unduplicated genome in a solifuge, disfavoring the traditional grouping of pseudoscorpions and camel spiders as Haplocnemata. Abstract Recent advances in higher‐level invertebrate phylogeny have leveraged shared features of genomic architecture to resolve contentious nodes across the tree of life.
Guilherme Gainett, Benjamin C. Klementz, Emily V. W. Setton, Catalina Simian, Hernán A. Iuri, Gregory D. Edgecombe, Alfredo V. Peretti, Prashant P. Sharma   +7 more
wiley   +1 more source

Biología reproductiva en soporte de la conservación: Primera descripción de algunos estadios reproductivos del angelote chileno Squatina armata (Phillipi, 1987)

South Sustainability
En el Océano Pacífico Oriental (OPO) se ha descrito la presencia del angelote chileno Squatina armata, una especie altamente comercializada y consumida en el Perú.
Nelly Giannina Peña Cutimbo, Rosa Maria Cañedo Apolaya, Cristel Elena Cordero Maldonado, Adrian Custodio Uribe, Jeffrey Charles Mangel, Francisco Polanco Vásquez, Joanna Olga Gissella Alfaro Shigueto   +6 more
doaj   +1 more source

Assessing the reproductive consequences of mate retention and pair bond duration in Thorn‐tailed Rayadito (Aphrastura spinicauda), a short‐lived, socially monogamous neotropical bird

Ibis, Volume 166, Issue 2, Page 396-410, April 2024.
The adaptive value of mate retention has been studied in several socially monogamous birds but evidence of reproductive benefits for short‐lived species is inconclusive. Most studies come from northern latitudes but more research on tropical birds is needed, as these species typically show higher survival rates and longer pair bonds than those from ...
Esteban Botero‐Delgadillo, Rodrigo A. Vásquez, Bart Kempenaers   +2 more
wiley   +1 more source

Nest‐site selection and reproductive success of a critically endangered parrot, the Great Green Macaw (Ara ambiguus), in an anthropogenic landscape

Ibis, Volume 166, Issue 2, Page 518-533, April 2024.
Nest‐site selection is the principal way in which secondary cavity‐nesting species mitigate the negative effects of factors such as predation, parasitism and exposure on reproductive success. Large‐bodied secondary cavity‐nesting birds rely on large cavities in mature trees that are often absent or reduced in anthropogenically disturbed forests. Hence,
Thomas C. Lewis, Ignacio Gutiérrez Vargas, Claire Vredenbregt, Mario Jimenez, Ben Hatchwell, Andrew P. Beckerman, Dylan Z. Childs   +6 more
wiley   +1 more source

Interacción de los nectarios extraflorales en inflorescencias de Leptospron adenanthum (Phaseolinae, Fabaceae) con hormigas visitantes

Boletín de la Sociedad Argentina de Botánica
Introducción y objetivos: Leptospron adenanthum tiene nectarios extraflorales (NEFs) activos en sus inflorescencias que atraen hormigas nectarívoras. Para caracterizar la interacción entre los NEFs de L.
Fabiana S. Ojeda, María Teresa Amela García   +1 more
doaj   +1 more source

BIOLOGÍA REPRODUCTIVA DE COLOGANIA BROUSSONETII (FABACEAE, FABOIDEAE)

Darwiniana, 2008
Se estudió el sistema reproductivo, la producción natural de frutos y semillas, y el papel de los polinizadores en Cologania broussonetii. Se realizaron cuatro cruzamientos controlados: autopolinización espontánea, autopolinización manual, polinización ...
Mariana L. Musicante, Leonardo Galetto
doaj  

Histología del desarrollo folicular de híbridos entre Triatoma infestans Klug, 1864 Y Triatoma platensis Neiva, 1913 (Hemiptera: Heteroptera)

Acta Biológica Colombiana, 2021
Triatoma infestans y Triatoma platensis son especies interfértiles que en ocasiones comparten ecotopos y producen híbridos fértiles naturales. El cruzamiento interespecífico podría permitir la producción de genotipos híbridos capaces de colonizar nuevos ...
Federico Gastón Fiad, Fernando José Carezzano, Miriam Cardozo, Claudia Susana Rodríguez   +3 more
doaj  

Partenogénesis: Un modelo para el estudio de los eventos tempranos del desarrollo mamífero Parthenogenesis: a model for the study of early events of mammalian development

Iatreia, 2000
Las nuevas tecnologías en reproducción animal han abierto líneas de investigación y con ello se han planteado conceptos que revolucionan el campo de la biología reproductiva y de la genética.
Julio César Bueno Sánchez, Jesús Alfredo Berdugo Gutiérrez   +1 more
doaj