Now showing items 31-40 of 70
Is mating in the Túngara Frog (Engystomops pustulosus: Leptodactylidae) random or non-random?
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 ...
First record of the Greenhouse frog, Eleutherodactylus planirostris (Anura: Eleutherodactylidae), in Costa Rica
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 ...
Hemidactylus frenatus (Common House Gecko). Diet
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, ...
Oxybelis aeneus: aggressive interactions with the clay-colored trush (Turdus grayi)
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 ...
Myxomycete colonization on translocated and non-translocated dead leaves from temperate and tropical forests
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 ...
Mosses as spore traps for myxomycetes
Small-mesh nylon bags filled with autoclaved samples of mosses were placed out in the field in northwest Arkansas and central Costa Rica to assess the extent to which mosses could serve as spore traps for myxomycetes. The ...
Ontogeny of an interactive call-and-response system in Spix's disc-winged bats
We investigated the ontogenetic changes of two call types, the inquiry call and the response call, which comprise an interactive communication system in Spix's disc-winged bats, Thyroptera tricolor. We documented structural ...
This is a slideshow produced for the 10th International Congress on the Systematics and Ecology of Myxomycetes, held in the city of Turrialba (UCR, Sede del Atlántico) in February 2020.
Contact calling in context: intra- and intergroup variation in vocalization rates depend on a call’s function
To maintain group cohesion while coordinating group movements, individuals might use signals to advertise the location of a route, their intention to initiate movements, or their position at a given time. In highly mobile ...
Kinship, association, and social complexity in bats
Among mammals, bats exhibit extreme variation in sociality, with some species living largely solitary lives while others form colonies of more than a million individuals. Some tropical species form groups during the day ...