Listar Biología por autor "e7d66add-354c-4b7d-96b0-fa38c1539ec6"
Mostrando ítems 21-40 de 104
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Day/night change in orientation of the orb-weaver Azilia guatemalensis (Araneae: Tetragnathidae)
Barrantes Montero, Gilbert; Angulo Vásquez, John; Carvajal Cerdas, Diego; Ureña Rojas, Angélica; Zúñiga Madrigal, Jorge (2021)Most orb weavers orient downward on their orbs, but here we describe an unusual pattern of orientation in the tetragnathid Azilia guatemalensis. This species changes its orientation on the hub with a consistent day/night ... -
Descripción acústica del dueto de Pezopetes capitalis, un ave endémica de Costa Rica y el Oeste de Panamá
Trejos Araya, Carla; Barrantes Montero, Gilbert (2015)Los duetos han sido estudiados ampliamente y sus funciones varían entre especies, sin embargo en todos los casos, la sincronía temporal de los elementos cantados por cada individuo de la pareja parece tener un papel ... -
Description of the acoustical interaction and synchronization between duetters of the Large-footed Finch (Pezopetes capitalis)
Trejos Araya, Carla; Barrantes Montero, Gilbert (2017)Duets are highly coordinated acoustical displays produced by two individuals. Studying the structure of duet songs and its causes is essential to understand the ecological role and evolution of this form of communication. ... -
Detritus camouflage in webs of Helvibis longicauda (Araneae: Theridiidae)
Barrantes Montero, Gilbert (2007)Adult females of Helvibis longicauda accumulated tiny pieces of vegetation in the mesh of their webs. The amount of debris accumulated was much greater in webs of spiders with either egg sacs, spiderlings or juveniles than ... -
Differences in web features between two sympatric Leucauge species (Araneae: Tetragnathidae) suggest a trade-off in prey capture strategy
Vargas Gamboa, Alejandra; Barrantes Montero, Gilbert (2021)The design of orb webs is affected by multiple abiotic (e.g., wind, available space), biotic (e.g., prey availability, predation), and species specific (e.g., spider size) factors. Thus, some features of each spider web ... -
Distribución, ecología y conservacion de la avifauna de la cuenca del río Savergre, Costa Rica
Sánchez Pérez, Julio E.; Barrantes Montero, Gilbert; Durán, Francisco (2004)Presentamos en este trabajo información sobre la riqueza, distribución y patrones de endemismo de la cuenca del río Savegre. Adicionalmente, incluimos información general sobre la dieta, condición (ej., residente o migratoria) ... -
Do different methods yield equivalent estimations of brain size in birds?
Ocampo Vargas, Diego; Sánchez Morales, César; Barrantes Montero, Gilbert (2020-08-31)The ratio of brain size to body size (relative brain size) is often used as a measure of relative investment in the brain in ecological and evolutionary studies on a wide range of animal groups. In birds, a variety of ... -
Efecto del tamaño corporal y el cuidado parental sobre el tamaño de la camada y de los huevos en teridioides
Barrantes Montero, Gilbert (2015)Los rasgos especie-específicos de historia de vida resultan de la interacción entre diferentes factores. En arañas el tamaño de camada y el tamaño de los huevos se espera que esten influenciados por el tamaño corporal de ... -
Effect of barriers and distance on song, genetic, and morphological divergence in the highland endemic Timberline Wren (Thryorchilus browni, Troglodytidae)
Fuchs Castillo, Eric J.; Camacho Alpízar, Andrés; Barrantes Montero, Gilbert (2018)Populations may become isolated by distance, geographic barriers or both. Isolated populations often diverge in behavioral, morphological and genetic traits as a result of reduced inter-population gene flow. Highland species ... -
Effect of El Niño and La Niña on abundance of frugivorous and nectarivorous terrestrial birds in three tropical forests
Barrantes Montero, Gilbert; Sandoval Vargas, Luis Andrés (2019-05-14)El Niño and La Niña climatic oscillations have dramatic effects on population dynamics and community structure of different animals. For marine birds, El Niño phenomenon drastically increases their mortality and reduces ... -
Effect of fragmentation on the Costa Rican dry forest avifauna
Barrantes Montero, Gilbert; Ocampo Vargas, Diego; Ramírez Fernández, José Daniel; Fuchs Castillo, Eric J. (2016)Deforestation and changes in land use have reduced the tropical dry forest to isolated forest patches in northwestern Costa Rica. We examined the effect of patch area and length of the dry season on nestedness of the entire ... -
Effect of urbanization on the avifauna in a tropica metropolitan area
Biamonte, Estaban; Sandoval Vargas, Luis Andrés; Chacón Madrigal, Eduardo; Barrantes Montero, Gilbert (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 ... -
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
Lobo Segura, Jorge Arturo; Barrantes Montero, Gilbert; Castillo, Marvin; Quesada Monge, Ruperto; Maldonado Ulloa, Tirso; Fuchs Castillo, Eric J.; Solís, Silvia; Quesada Avendaño, Mauricio (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. ... -
Egg sac construction by folding dead leaves in Pozonia nigroventris and Micrathena sp. (Araneae: Araneidae)
Moya Ramírez, Jairo; Quesada Hidalgo, Rosannette; Barrantes Montero, Gilbert; Eberhard Chabtree, William G.; Escalante Meza, Ignacio; Esquivel Dobles, Carolina; Rojas, Andrés; Triana Cambronero, Emilia; Arias, Adriana (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 ... -
Elevational and seasonal patterns of plant pollinator networks in two highland tropical ecosystems in Costa Rica
Cristóbal Pérez, Edson Jacob; Barrantes Montero, Gilbert; Cascante Marín, Alfredo; Hanson Snortun, Paul; Picado, Beatriz; Gamboa Barrantes, Nicole; Rojas Malavasi, Geovanna; Zumbado, Manuel A.; Madrigal Brenes, Ruth; Martén Rodríguez, Silvana; Quesada Avendaño, Mauricio; Fuchs Castillo, Eric J. (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 ... -
Environmental rugosity, body size and access to food: a test of the size-grain hypothesis in tropical litter ants
Farji Brener, Alejandro G.; Barrantes Montero, Gilbert; Ruggiero, Allan (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 ... -
The evolution of prey‐wrapping behaviour in spiders
Barrantes Montero, Gilbert; Eberhard Chabtree, William G. (2007)We traced the evolution of silk use by spiders in attacks on prey by combining previous publications with new observations of 31 species in 16 families. Two new prey‐wrapping techniques are described. One, in which the ... -
Extreme Behavioral Adjustments by an Orb‐Web Spider to Restricted Spaces
Barrantes Montero, Gilbert; Eberhard Chabtree, William G. (2012)Adaptive flexibility in response to environmental variation is often advantageous and occurs in many types of traits in many species. Although the basic designs of the orb webs of a given species are relatively uniform, ... -
Fallen Branches as Part of Leaf-Cutting Ant Trails: Their Role in Resource Discovery and Leaf Transport Rates in Atta cephalotes
Farji Brener, Alejandro G.; Barrantes Montero, Gilbert; Laverde, O.; Fierro Calderón, K.; Bascopé, F.; López Ordaz, Adriana (2007)Fallen branches, logs, and exposed roots (fallen branches hereafter) commonly form part of the trunk trail system of leaf-cutting ants that inhabit the tropical rain forest. We studied the role of fallen branches on resource ... -
Feeding by Philoponella vicina (Araneae, Uloboridae) and how uloborid spiders lost their venom glands
Weng, Ju Lin; Barrantes Montero, Gilbert; Eberhard Chabtree, William G. (2006)Feeding by uloborid spiders is unusual in several respects: cheliceral venom glands are absent; prey wrapping is extensive (up to several hundred metres of silk line) and severely compresses the prey; the spider’s mouthparts ...