Search
Now showing items 1-10 of 43
Characteristics of the spontaneous deposition of Sn in polycrystalline Pt
(2012-04)
Spontaneous deposition of tin (Sn) in polycrystalline platinum (Pt pc) from a sulfuric acid solution of tin salts, was evaluated by conventional electrochemical techniques, to determine its characteristics. Tin was deposited ...
Observation of Varroa destructor behavior in capped worker brood of Africanized honey bees
(Springer Science + Business Media B.V., 2012-06-12)
The behavioral activity of Varroa destructor was observed using transparent cells. Mite oviposition started at 45.0 ± 25.0 h post capping, followed by the next eggs laid at regular 27.3 ± 2.0 h intervals. On the prepupa, ...
First record of the sea anemone Anthopleura nigrescens (Cnidaria: Actiniaria: Actiniidae) on the Pacific coast of Central America
(Marine Biological Association of the United Kingdom, 2012-08)
We report the first record of the sea anemone Anthopleura nigrescens on the Pacific coast of Central America. Five specimens from Mata Limón (Costa Rica) were collected from rocks of a man-made breakwater at sub-tidal ...
The histological structure of the androgenic gland and cellular cord of the male reproductive system of adult litopenaeus and rimapenaeus byrdi
(2012-05-01)
The current knowledge of the precise extension and location of the androgenic gland (AG) in the genera Litopenaeus and Rimapenaeus is partial. Therefore, we analyzed the complete structure of the AG and cellular cord ...
Cianobacterias bentónicas marinas en el Caribe central y sur de Costa Rica
(Universidad Nacional (Costa Rica), 2012-12)
Las cianobacterias comprenden un grupo de microorganismos del dominio Bacteria (Woese et al. 1990) poco estudiado en Costa Rica. Los escasos trabajos realizados abordan temáticas relacionadas con la ocu-rrencia de ...
Percepción y conocimiento popular sobre el cocodrilo Crocodylus acutus (Reptilia: Crocodylidae) en zonas aledañas al río Tempisque, Guanacaste, Costa Rica
(Universidad Estatal a Distancia, 2012-12)
Perception and popular culture about the crocodile (Crocodylus acutus) near Tempisque River, Guanacaste, Costa Rica. The American crocodile (Crocodylus acutus) is an endangered species due to habitat loss and illegal ...
Caracterización del paisaje y análisis del límite oeste del Parque Nacional Carara, Costa Rica: implicaciones para la conservación de la biodiversidad
(Museo Nacional de Costa Rica, 2012)
It is unknown if the current size and shape of protected areas (PA) in Costa Rica favors retention of viable populations of wildlife. The western border of Carara National Park (CNP) and its surroundings were characterized ...
Predation of Long-tailed Silky Flycatcher (Ptilogonys caudatus) by Ornate Hawk-eagle (Spizaetus ornatus) in a cloud forest of Costa Rica
(Revista Brasileira de Ornitología, 2012-12)
Predation of Long-tailed Silky Flycatcher (Ptilogonys caudatus) by Ornate Hawk-Eagle (Spizaetus ornatus) in a cloud forest of Costa Rica. Tis paper is the frst record of a predation event made by an Hawk-Eagle (S.ornatus, ...
Use of food and spatial resources by two frogs of the genus Dendropsophus (anura: Hylidae) from La Selva, Costa Rica
(Universidade de Sao Paulo, 2012-06)
Differences in the use of resources by similar species have been related to a reduction in the interspecific competition that allows coexistence. Also, other factors, such as high availability of resources in the environment, ...
Los onicóforos, fósiles caminantes
(Consejo Nacional de Ciencia y Tecnología de El Salvador, 2012-08-23)
Los onicóforos son considerados
“fósiles vivientes” porque durante
más de 500 millones de años su
morfología ha cambiado muy poco
y han mantenido un estadio evoluti vo aparentemente intermedio entre
los anélidos ...