Buscar
Mostrando ítems 61-70 de 104
Viscid globules in webs of the spider achaearanea tesselata (araneae: theridiidae)
(2006)
We describe the presence and dimensions of viscid globules in both the sheet and tangle portions of the webs of Achaearanea tesselata (Keyserling 1884). We found viscid globules in all sheets and tangles of the webs examined. ...
Genetic structure in neotropical birds with different tolerance to urbanization
(2022)
Gene flow in birds can be affected by urbanization depending on natural history traits and adaptability
to habitat change. Contrasting results can be expected when comparing species with opposite
resilience to urbanization. ...
Environmental rugosity, body size and access to food: a test of the size-grain hypothesis in tropical litter ants
(2004)
In terrestrial walking organisms, long legs help to decrease the cost of running, allowing animals to step over environmental interstices rather than walking through them. However, long legs can complicate the infiltration ...
Genetic And Morphological Variation Of The Sooty-capped Bush Tanager (Chlorospingus Pileatus), A Highland Endemic Species From Costa Rica And Western Panama
(2010)
We examined the effect of geographic isolation on morphology, genetic structure, and abundance of the Sooty-capped Bush Tanager (Chlorospingus pileatus), an endemic species restricted to highlands of Costa Rica and western ...
Blooming plant species diversity patterns in two adjacent Costa Rican highland ecosystems
(2023-01-12)
The Costa Rican Paramo is a unique ecosystem with high levels of endemism that is geographically isolated from the Andean Paramos. Paramo ecosystems occur above Montane Forests, below the permanent snow level, and their ...
Is black plumage an adaptation to high elevations in a cosmopolitan bird genus?
(2019)
Black plumage is expected to absorb and retain more heat and provide better protection against UV radiation compared with lighter plumages. Black plumage is common in species of the genera Turdus and Platycichla that inhabit ...
Hub thread removal behaviour in the orb weaver Leucauge mariana (Araneae: Tetragnathidae)
(2020-11-05)
Many orb-weaving spiders break the central lines of the hub at the end of web construction. Nevertheless, very little is known of how spiders break these lines and whether this behaviour differs among taxa. Here, we describe ...
Otro más que atraviesa el mutualismo plata - hormiga
ANOTHER ONE BREAKING THROUGH AN ANT PLANT MUTUALISM
(2018)
Las interacciones mutualistas entre hormigas y plantas son comunes y el grado de especialización varía mucho entre ellas. Algunas especies de hormigas en el género Pseudomyrmex mantienen relaciones mutualistas obligatorias ...
Effect of urbanization on the avifauna in a tropica metropolitan area
(2011)
The rapid and unplanned expansion of urban areas is a common pattern in neotropical developing countries. Urbanization has eliminated or drastically altered large areas of natural habitats used by the rich neotropical ...
Reproducción, uso de habitat e historia natural del Capulinero negro y amarillo (Phainoptila melanoxantha), una especie endémica de las tierras altas de Costa Rica y oeste de Panamá.
REPRODUCTION, HABITAT USE, AND NATURAL HISTORY OF THE BLACK-AND-YELLOW SILKY-FLYCATCHER (PHAINOPTILA MELANOXANTHA), AN ENDEMIC BIRD OF THE WESTERN PANAMA-COSTA RICAN HIGHLANDS
(2002)
Estudiamos la abundancia relativa, distribución geográfica, dieta y reproducción del Capulinero negro y amarillo (Phainoptila melanoxantha), una especie endémica a las tierras altas de Costa Rica y oeste de Panamá. A lo ...