Biología
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Diversidad de libélulas (Insecta: Odonata) en ambientes lénticos con diferente grado de alteración antropogénica
(2019-08-10)Costa Rica es el país centroamericano donde mejor se conoce la fauna de libélulas (Insecta: Odonata). Sin embargo, los estudios han estado enfocados principalmente en ambientes lóticos, generando un vacío de información ... -
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, ... -
Patrones de vocalización durante interacciones sociales de Rhynchonycteris naso (Chiroptera:Emballonuridae) en Costa Rica
(2020-11-17)Las señales vocales en el estudio de la comunicación animal tienen un potencial para transferir información que puede ser evaluado a través de sus características físicas (Kazial y Masters 2004), las cuales convergen en ... -
Myxomycete colonization on translocated and non-translocated dead leaves from temperate and tropical forests
(2020-11)Samples of dead leaves on the forest floor were collected from a locality in central Costa Rica and another locality in northwest Arkansas in the United States and then were placed in fine-mesh nylon bags, autoclaved and ... -
Comparative analysis on datasets of myxomycetes associated with boreal, temperate and tropical regions of North America
(2020-10)Datasets from boreal (Denali National Park, United States), temperate (Great Smoky Mountains National Park, United States) and tropical (La Selva Biological Station, Costa Rica) regions of North America were subjected ... -
Myxomycetes within ecotones in temperate and tropical forests
(2021)Ecotones are interesting portions of forests where microorganisms can be studied for monitoring and diversity purposes. Given the faster life cycle of these organisms, their study in such a context is important to develop ... -
Sexual size dimorphism and ecomorphology of the Berthold’s bush anole (Polychrus gutturosus) in Costa Rica: Preliminary data
(2019)Sexual size dimorphism (SSD) is the result of sexual or natural selection operating differently on the body sizes of females and males. Males of most lizard species are larger than females, suggesting intrasexual selection on ... -
Calling for more accurate information in aquarium trade: analysis of live-fish import permits in Costa Rica
(2017)Ornamental fish trade is a growing business around the world, but also a major pathway for the introduction of potentially invasive species. Trade patterns and policies have been evaluated in high-income countries while ... -
Differences in plasmatic butyrylcholinesterases (BChE) values between Pacific and Caribbean populations of terciopelo (Bothrops asper) in Costa Rica
(2019)The terciopelo (Bothrops asper) inhabits human-modified environments such as agricultural areas, becoming more prone to be exposed to organophosphate insecticides. These chemicals can inhibit plasmatic butyrylcholinesterases ... -
Is mating in the Túngara Frog (Engystomops pustulosus: Leptodactylidae) random or non-random?
(2017)Random and non-random mating result from sexual selection, and both can occur across populations of the same species. Body size is a trait commonly used to determine if mating is random or non-random, and for the latter ... -
Behavioural responses of reptiles to visitors of protected areas in Costa Rica
(2016)Tourists can have a strong impact on the behaviour of wild animals, modifying foraging strategies, diet and habitat use, increasing stress, and altering communication and escaping behaviour. Such behavioural changes have ... -
Signal repertoire and contest outcome in the Jacky dragon
(2016)Establishing dominance is an important mechanism for determining access to resources such as mates or territories. However, levels of aggression and dominance may vary among populations based on history and variation in ... -
Oxybelis aeneus: aggressive interactions with the clay-colored trush (Turdus grayi)
(2018)In this note an aggressive encounter between a brown vine snake (Oxybelis aeneus) and a clay-colored thrush (Turdus grayi) is reported. The observations took place in the campus of the University of Costa Rica, Limón ... -
Hemidactylus frenatus (Common House Gecko). Diet
(2017)Hemidactylus frenatus is an invasive species in the Americas that has succeeded in establishing populations in Costa Rica (Savage 2002. The Amphibians and Reptiles of Costa Rica: A Herpetofauna between Two Continents, ... -
Ecología del Homo sapiens y su relación sociocultural
(2017)Muchos individuos de la especie Homo sapiens consideran estar separada del resto de criaturas del Reino Animal. Esto implica que hay un desligamiento de las relaciones entre el ser humano y el entorno natural, cuyas causas ... -
Effect of exposition to chlorpyrifos upon plasmatic cholinesterases, hematology and blood biochemistry values in Bothrops asper (Serpentes: Viperidae)
(2018)The terciopelo (Bothrops asper), is one of the most important venomous snakes in Costa Rica and common on agriculture where insecticides are frequently used for pest control. To assess the exposure to organophosphates on ... -
Morphological and ecological variation of a tropical anoline lizard: are agonistic interactions shaping ecomorphological relationships?
(2018)Ecologists have long been intrigued by which factors influence habitat use by an organism and how communities are structured. However, the links between habitat preferences, morphology, biotic interactions and community ... -
Biology of snakes of the genus Tretanorhinus: an integrative review
(2019)Many aspects of the biology of various snake species remain unknown, and the extent of this lack of information is not always clear. As new research usually depends upon previous findings, the gaps in our knowledge and ... -
Composition and species richness of the herpetofauna of a Costa Rican University campus
(2019)The campus of the University of Costa Rica in Limón port city, Costa Rica, known as Sede del Caribe (SC), includes a secondary forest of ca. 40 years old. This forest holds a great potential for environmental education, ... -
First record of the Greenhouse frog, Eleutherodactylus planirostris (Anura: Eleutherodactylidae), in Costa Rica
(2016)Introduced species can have a negative impact on native species, so that detection of new arrivals is fundamental to avoid establishment of breeding populations. Several species of frogs and lizards have been introduced ...
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