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Sexual size dimorphism and acoustical features of the pre-advertisement and advertisement calls of Rhinophrynus dorsalis Duméril & Bibron, 1841 (Anura: Rhinophrynidae)
(2015)
Las interacciones entre selección natural, selección sexual, y los requerimientos ecológicos específicos de las especies son responsables de la evolución de comportamientos complejos de cortejo y estrategias reproductivas. ...
Feeding by Philoponella vicina (Araneae, Uloboridae) and how uloborid spiders lost their venom glands
(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 ...
Construction and function of the web of Tidarren sisyphoides (Araneae: Theridiidae)
(2009)
In this paper, we describe the construction and function of the double sheet and tangle web of Tidarren sisyphoides (Walckenaer 1842). Web construction includes several stages: construction of the scaffolding that serves ...
The evolution of prey‐wrapping behaviour in spiders
(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 ...
Nest daily survival rate of six Costa Rican urban birds
Tasa de sobrevivencia diaria de nidos en seis aves urbanas en Costa Rica
(2020-12)
The advance of urbanization in Neotropical countries has drastically changed or eliminated extensive areas of natural habitats. Despite these changes, some species breed in cities and adapt to urban conditions. Several ...
Historia natural y repertorio acústico del Sancuinclas (Pezopetes capitalis), ave endémica de Costa Rica y el oeste de Panamá
NATURAL HISTORY AND ACOUSTIC REPERTOIRE OF THELARGE-FOOTED FINCH (PEZOPETES CAPITALIS), AN ENDEMIC, HIGHLAND BIRD OF COSTA RICA AND WESTERN PANAMA
(2014)
El Sancuinclas es una especie endémica y un habi- tante común del sotobosque de bosques montanos y páramo en las tierras altas de Costa Rica y el oeste de Panamá. A pesar de ser una especie común, existía poca información ...
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 ...
The mystery of how spiders extract food without masticating prey
(2006)
Standard accounts of how spiders obtain food without masticating their prey are probably largely wrong. Species in the families Uloboridae, Thomisidae, Araneidae and Theridiidae do not inject digestive fluid into the prey’s ...
Birds in Coastal and Marine Environments
(Springer Science & Business Media, 2009)
In Costa Rican coastal and marine environments (e.g., estuaries, mud- flats, islands, open ocean) 96 bird species have been recorded, 11% of the total avifauna in the country. This high diversity is primarily explained by ...
Ontogeny repeats phylogeny in Steatoda and Latrodectus spiders
(2010)
Web designs of young spiders are often less derived than those of older conspecific individuals. This study tested whether this ‘‘ontogeny repeats phylogeny’’ pattern occurs in two species of Latrodectus and two species ...