Listar Biología por título
Mostrando ítems 530-549 de 1634
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Effect of temperature on the visual displays of the Jacky dragon
(2019)In ectotherms such as lizards, temperature is a key determinant of their behavior and their ability to signal to conspecifics. We asked whether changes in the thermal environment along the distribution of an agamid lizard, ... -
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 ... -
Effective gene flow patterns across a fragmented landscape in southern Costa Rica for Symphonia globulifera (Clusiaceae); a species with mobile seed and pollen dispersers Patrones efectivos de flujo de genes a través de un paisaje fragmentado en el sur de Costa Rica para una especie con dispersores móviles de polen y semillas; Symphonia globulifera (Clusiaceae)
(2019-04)In tropical trees, forest fragmentation has been shown to affect mating and gene flow patterns. Mobile dispersal vectors should be less sensitive to fragmented landscapes and may ameliorate the genetic effects of forest ... -
Effects of management and landscape composition on the diversity and structure of tree species assemblages in coffee agroforests
(2014-09-07)Understanding the processes that influence tree species composition in agricultural landscapes is essential for conservation of tropical biodiversity outside of protected areas. We analyzed the effects of landscape composition ... -
Effects of roost specialization on extinction risk in bats
(2015)Understanding causes and consequences of ecological specialization is of major concern in conservation. Specialist species are particularly vulnerable to human activities. If their food or habitats are depleted or lost, ... -
Effects of selective logging on the abundance, regeneration and short-term survival of Caryocar costaricense (Caryocaceae) and Peltogyne purpurea (Caesalpinaceae), two endemic timber species of southern Central America
(2007)In this study, we determined the effects of selective logging on the abundance of the last remnant populations of two tropical timber species with a restricted distribution, Caryocar costaricense and Peltogyne purpurea. ... -
Effects of temperature on the embryonic development and hatchling size of Betaeus emarginatus (Decapoda: Caridea: Alpheidae)
(2003)Betaeus emarginatus is an alpheid shrimp inhabiting rock pool environments characterized by strong fluctuations of ambient factors. Here we describe the embryonic development of B. emarginatus, and analyse the effects of ... -
Egg clutch survival under prolonged paternal care in a Glass Frog, Hyalinobatrachyum talamancae
(2020-04-11)Previous studies have reported egg attendance as the most common protective behavior among the Neotropical frog family Centrolenidae. However, research on the effect of parental care and other factors thought to affect ... -
Egg sac construction by folding dead leaves in Pozonia nigroventris and Micrathena sp. (Araneae: Araneidae)
(2010)Published descriptions of egg sac construction behavior in araneids are scarce. We describe egg sac construction and oviposition in one individual of the poorly known araneid Pozonia nigroventris (Bryant 1936) and two ... -
Electric-field control of single-molecule tautomerization
(2020)The electric field is an important parameter to vary in a single-molecule experiment, because it can directly affect the charge distribution around the molecule. Yet, performing such an experiment with a well-defined ... -
Electroactive copper (II) bimetallic self-assembled multilayers on Si (100)
(2012)Silicon (100) surfaces were modified by reacting 4-aminopyridine and Si–Cl bond. These surfaces were further used for tethering copper bimetallic complexes and growing monolayers and multilayers by changing the axial ... -
Elevational and seasonal patterns of plant pollinator networks in two highland tropical ecosystems in Costa Rica
(2024-01-11)Many plant species in high montane ecosystems rely on animal pollination for sexual repro- duction, however, our understanding of plant-pollinator interactions in tropical montane hab- itats is still limited. We compared ... -
Empirical evidence for multiple costs of begging in poison frog tadpoles
(2018)In recent decades, theoretical and empirical work has investigated the relative roles of costs and benefits in inhibiting excessive displays of begging to parents. Whether costs are important in maintaining reliability of ... -
En busca de Karl Hoffmann
(2006)Se comenta y analiza el libro biográfico escrito por Luko Hilje "Karl Hoffmann: naturalista, médico y héroe nacional" (Heredia, Costa Rica: INBio, 2006). -
Energy flow structure and role of keystone groups in shallow water environments in Isla del Coco, Costa Rica, Eastern Tropical Pacific
(2019)Isla del Coco (Costa Rica) forms part of the five oceanic islands of the Eastern Tropical Pacific and is well known for its high biodiversity and great endemism. While several marine biological and oceanographical surveys ... -
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 ... -
Epidendra Nova Talamancana
(2016-09-02)Two new species of Epidendrum from the Costa Rican montane rainforest, E. hartmanniorum and E. vallis-silentii, are described, illustrated and compared with similar species. Epidendrum stolidium and E. unicallosum are ...