Search
Now showing items 1-10 of 81
Variabilidad genética de la avifauna de las tierras altas de Costa Rica: Consecuencias del calentamiento global.
(2011-07-09)
Determinar la susceptibilidad de un grupo de aves pertenecientes a diferentes líneas evolutivas (e.g.trochilidae, tyrannidae, emberizidae) a los cambios ambientes que pueden ocurrir como consecuencia del incremento en la ...
Lactrodectismo en Costa Rica
Latrodectism in Costa Rica
(2017)
Se reporta un accidente causado por la araña Latrodectus geometricus, incluida en el grupo conocido como “viudas negras”, en Costa Rica. El accidente le ocurrió a una mujer de 27 años vecina de la ciudad de Cartago, en su ...
La viuda negra en Costa Rica: información general
(2016)
La viuda café (Latrodectus geometricus) ha sido probablemente introducida a América desde la región mediterránea de África. Desde su llegada a Costa Rica, esta especie ha expandido su distribución rápidamente colonizando ...
Morphological adaptations for relatively larger brains in hummingbird skulls
(2018)
A common allometric pattern called Haller’s Rule states that small species have relatively larger brains and eyes than larger species of the same taxonomic group. This
pattern imposes drastic structural changes and ...
Description of the acoustical interaction and synchronization between duetters of the Large-footed Finch (Pezopetes capitalis)
(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. ...
Natural history, courtship, feeding behaviour and parasites of Theridion evexum (Araneae: Theridiidae)
(2007)
Theridion evexum constructs webs in the understory of wet middle-elevation forests in Costa Rica. The spiders construct retreats by curling a leaf and produce a mesh in front of the opening. Long, more or less vertical ...
Effect of barriers and distance on song, genetic, and morphological divergence in the highland endemic Timberline Wren (Thryorchilus browni, Troglodytidae)
(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 ...
Abundancia y fluctuaciones de aves limícolas (Charadriiformes) en una playa fangosa de Chomes, Costa Rica
(1992)
We recorded 27 species of Charadriiformes on the mud flats of Chomes, Golfo de Nicoya, Costa Rica, during biweekly censuses over one year. These were grouped taking into account their abundance and permanence on the flat. ...
Messua sp. (Salticidae), the host spider of the polysphinctine Inbioia pivai (Ichneumonidae: Pimplinae)
(2019)
The koinobiont ectoparasitoids of spiders in the Polysphincta genus group are divided into two well-supported clades. Species in one clade parasitize spiders in the higher araneoid group, and the behaviour of these ...
Fallen Branches as Part of Leaf-Cutting Ant Trails: Their Role in Resource Discovery and Leaf Transport Rates in Atta cephalotes
(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 ...