Results 31 to 40 of about 17,317 (119)

Sex‐Specific Atlantic Salmon Upstream Passage and Fallback at a Natural Cascade After Dam Removal

open access: yesFisheries Management and Ecology, EarlyView.
ABSTRACT In the Boquet River (NY, USA) a low‐head dam set above a ~200‐m bedrock cascade was removed in 2015. We used radio‐telemetry to assess landlocked Atlantic salmon passage at the remaining cascade (2020, 2022). Across years, 52% of males (13/25) attempted cascade passage whereas females made no discernable attempts (0/11).
Kurt C. Heim   +5 more
wiley   +1 more source

Análisis microestructural por DRX de CaO obtenido a partir de carbonato cálcico molido (CCM)

open access: yesBoletín de la Sociedad Española de Cerámica y Vidrio, 2004
The development of limes obtained by firing of a ground calcium carbonate (GCC) from Clariana (Tarragona), at constant maximum temperature (960 ºC) and at different permanence times was studied. Reflections 111, 200, 220, 311, corresponding to structural
Bastida, J.   +3 more
doaj  

Influencia de la cobertura vegetal en la morfometría y abundancia de Ucides occidentalis en dos islas del archipiélago de Jambelí​

open access: yesRevista Científica y Tecnológica UPSE
El cangrejo rojo Ucides occidentalis es una especie clave que funciona como bioindicador de la salud del ecosistema manglar. El presente estudio evalúa la relación entre las características morfométricas, diversidad y salud de este ecosistema a través ...
Marcela Elizabeth Robles Zambrano   +3 more
doaj   +1 more source

Melanism in salamanders: effects of insularity, sex and size on dorsal colouration in Salamandra salamandra

open access: yesJournal of Zoology, EarlyView.
In this study we tested the effects of insularity on amphibian colouration using the fire salamander as a model system. Although increased melanism was not a consistent pattern across all islands, salamanders from one island exhibited higher proportions of black pigmentation than mainland populations, while insular populations overall showed reduced ...
L. Alarcón‐Ríos   +2 more
wiley   +1 more source

Determinantes de lesión aterosclerótica carotídea estenoclusiva y de ocurrencia de ictus aterotrombótico grande homolateral

open access: yesRevista Cubana de Medicina Militar, 2022
Introducción: En pacientes con infarto cerebral, la mortalidad en el primer mes se sitúa en un 15 % y 20 %; depende fundamentalmente de la localización y el tamaño del infarto.
Melvis González Méndez   +2 more
doaj  

Elevation shapes alpine snow algal blooms and their influence on albedo reduction

open access: yesNew Phytologist, EarlyView.
Graphical summary of elevational trends in Sanguina‐dominated snow algal blooms. Increasing elevation was associated with larger cells, lower Chla content per cell, higher astaxanthin ratios, lower snow water content, and reduced cell‐normalized albedo, whereas algal cell density showed no consistent elevational trend.
Pablo Almela   +5 more
wiley   +1 more source

Costa Rica’s Marine Protected Areas: status and perspectives

open access: yesRevista de Biología Tropical, 2012
With 51 100km2 of terrestrial area and 589 000km² of national waters, Costa Rica is considered one of the countries with the greatest biodiversity. It has approximately 3.5% of the world marine species.
Juan José Alvarado   +3 more
doaj  

Microbial Oxidative Stress in Food Fermentations: A Comprehensive Review

open access: yeseFood, Volume 7, Issue 4, August 2026.
Oxidative stress has a dual role in food fermentations: low ROS supports adaptive signaling, whereas excessive ROS causes cellular damage and process inhibition. Managing redox state as a controllable process variable can improve fermentation robustness and final food quality.
Wanrong Hu   +11 more
wiley   +1 more source

Ecology of reintroduced Rocky Mountain bighorn sheep in Dinosaur National Monument La Ecología de Borrego Cimarron de las Montañas Rocosas Reintroducido en el Monumento Nacional de Dinosaurio

open access: yesWildlife Monographs, Volume 223, Issue 1, August 2026.
We synthesized GPS telemetry, genetic, and pathogen data to evaluate metapopulation processes in a reintroduced Rocky Mountain bighorn sheep (Ovis canadensis canadensis) population in Dinosaur National Monument. We estimated subpopulation‐specific abundances and found 4 small subpopulations with high genetic diversity, partial connectivity, and ...
Sarah L. Carroll   +8 more
wiley   +1 more source

EXPERIENCIA DOCENTE EN LA UNIVERSIDAD DE COSTA RICA EN EL USO DE PUNTOS DE FUNCIÓN Y METODOLOGÍAS ORIENTADAS A OBJETOS PARA ESTIMAR PROYECTOS DE SOFTWARE

open access: yesIngeniería, 2011
La estimación de proyectos de software es uno de los temas actuales más importantes dentro de la disciplina de la ingeniería de software. Este artículo describe la experiencia al enseñar a estimar y planificar un proyecto de software a estudiantes de ...
Gabriela Salazar Bermúdez
doaj   +1 more source

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