Listar Biología por título
Mostrando ítems 391-410 de 1643
-
Descripción y clave dicotómica de plántulas de especies de palmas (Arecaceae) nativas de la Reserva Biológica Tirimbina, Costa Rica, con observaciones generales sobre propagación e historia natural
(2015-12)Las palmas son uno de los principales componentes de los bosques tropicales; no obstante, existe muy poca información disponible para identificar plántulas. En este trabajo desarrollamos una clave dicotómica con fotografías ... -
Description of a new species of Pagurus Fabricius, 1775 (Crustacea: Paguroidea: Paguridae) from the Pacific coast of Costa Rica, Central America, with notes on Pagurus albus (Benedict, 1892)
(2019)A redescription of Pagurus albus (Benedict, 1892) is presented together with a description of a new species of hermit crab, Pagurus pseudoalbus sp. n., from the Pacific coast of Costa Rica. Pagurus pseudoalbus sp. n. differs ... -
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. ... -
Description of the final instar nymphs of seven species from Anacroneuria Klapálek (Plecoptera: Perlidae) in Costa Rica, and first record for an additional genus in Central America
(2011)The final nymphal stages for seven species of Anacroneuria Klapálek from Costa Rica are described for the first time based upon reared specimens: A. benedettoi Stark, 1998, A. divisa (Navás, 1924), A. holzenthali Stark, ... -
Description of the larva and pupa of Limnephilus hamifer Flint 1963 (Trichoptera, Limnephilidae) from Costa Rica
(2018)Se describe e ilustra por primera vez la larva y pupa de Limnephilus hamifer Flint 1963. La descripción está basada en material recolectado y criado del macizo montañoso Cerro de la Muerte de Costa Rica, además de material ... -
Description of the nest and eggs of the green thorntail (discosura conversii)
(2016-06-15)The breeding biology of the genus Discosura (Trochilidae) is poorly known. Here, we describe in detail the nest and eggs of the Green Thorntail (D. conversii). We analyze two nests; one was collected with two eggs at Limón ... -
Desinfección de superficies contaminadas con esporas de Clostridioides difficile con disoluciones activadas electroquímicamente
(2019)Clostridioides difficile es el principal agente causal de diarrea nosocomial. Esta bacteria se diferencia bajo ciertas condiciones adversas en endosporas, las cuales son difíciles de controlar debido a su alta resistencia ... -
Detalles estructurales de la especie Nothrus willmanni Mahunka 1983
(2015-12)En la descripción original de la especie Nothrus willmanni Mahunka 1983, se registra que esta especie presenta algunos caracteres únicos en este género. Sin embargo, algunos detalles estructurales no fueron incluidos, ... -
Detección y evaluación de la actividad antifúngica e insecticida de quitinasas producidas por bacterias del género Xenorhbadus sp Sc-CR9
(2023)El uso de agroquímicos representa un problema ambiental y de salud, ya que puede ocasionar problemas de resistencia, alteración al ambiente, contaminación y riesgo para la salud humana. Una alternativa diferente y más ... -
Detection of a synthetic sex steroid in the American crocodile (Crocodylus acutus): Evidence for a novel environmental androgen
(2017-08)Endocrine-disrupting contaminants (EDC's) are well known to alter sexual differentiation among vertebrates via estrogenic effects during development, particularly in organisms characterized by temperature-dependent sex ... -
Determinants of reef fish assemblages in tropical Oceanic islands
(2019)Diversity patterns are determined by biogeographic, energetic, and anthropogenic factors, yet few studies have combined them into a large‐scale framework in order to decouple and compare their relative effects on fish ... -
Detritus camouflage in webs of Helvibis longicauda (Araneae: Theridiidae)
(2007)Adult females of Helvibis longicauda accumulated tiny pieces of vegetation in the mesh of their webs. The amount of debris accumulated was much greater in webs of spiders with either egg sacs, spiderlings or juveniles than ... -
Developmental morphology of granular skin glands in pre-metamorphic egg-eating poison frogs
(2017)Parents in many taxa, including insects, mol- luscs, fish, snakes, and amphibians provision chemical defences, such as peptides, steroids, or alkaloids to their offspring to reduce the risk of predation. In most cases, ... -
Diagnóstico de contaminación de agua en la Quebrada Camaronera, Parque Nacional Manuel Antonio, Área de Conservación Pacífico Central, MINAE, Costa Rica
(2009-11-01)"La quebrada Camaronera en Manuel Antonio se considera un objeto de conservación y un valor natural para el Parque Nacional Manuel Antonio, encentrándose actualmente con un alto grado de amenaza. El objetivo de este estudio ...