Listar Biología por título
Mostrando ítems 257-276 de 1643
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Carbono, bosques y micorrizas: una “negación de investigación imperativa”
(2014)El estudio integrado de los sistemas biológicos asociados con el secuestro y fijación de carbono no ha sido prioritario en la determinación de los protocolos de cuantificación de este elemento. Este caso de reduccionismo ... -
Cariotipos de diez especies de serpientes costarricenses de la familia Viperidae
(1979)All the karyotypes of ten snake species of the family Viperidae from Costa Rica have a diploid number of 36 chromosomes, 16 macro- and 20 microchromosomes; females show an heteromorphism in the fourth pair. The karyological ... -
Cariotipos de las principales serpientes coral (Elapidae: Micrurus) de Costa Rica
(1979)Se describen los cariotipos de las tres especies de serpientes de coral (Elapidae: Micrurus) más abundantes en Costa Rica: M. nigrocinctus, M. alleni y M. mipartitus. M. nigrocinctus presenta dos poblaciones cariotípicas ... -
Carrion Feeding By Spiderlings Of The Cob-Web Spider Theridion evexum(Araneae, Theridiidae)
(2007)The use of carrion to feed spiderlings has never previously been observed in spiders. Here we show that the theridiid Theridion evexum Keyserling 1884 stored dead insectan prey for up to one week prior to the emergence of ... -
Caulerpa sertularioides, a green alga spreading aggressively over coral reef communities in Culebra Bay, North Pacific of Costa Rica
(2005)Caulerpa sertularioides, is a widespread chlorophyte, that can be confused with C. taxifolia, a highly invasive algae. C. sertularioides has erect, feather-like, occasionally branched fronds; its branchlets are opposite, ... -
Causas del aislamiento reproductivo en dos especies de Macrohaltica (Coleoptera, Chrysomelidae)
(2015-09-04)Prefacio Una de las principales implicaciones que tiene el concepto biológico de especie (CBE) es que al definir a la especie como un grupo reproductivamente aislado, supone la interrupción del flujo génico con otros ... -
Cellulose-Enriched Microbial Communities from Leaf-Cutter Ant (Atta colombica) Refuse Dumps Vary in Taxonomic Composition and Degradation Ability
(2016-03-21)Deconstruction of the cellulose in plant cell walls is critical for carbon flow through ecosystems and for the production of sustainable cellulosic biofuels. Our understanding of cellulose deconstruction is largely limited ... -
Censo de pelícanos pardos de la Reserva Natural Absoluta Cabo Blanco
(2010-11-30)El pelicano pardo o buchón es el único pelicano común en Costa Rica y el único que reside de forma permanente en la RNACB (Reserva Natural Absoluta de Cabo Blanco). Es un ave de color parduzco con la cabeza y el cuello ... -
Change in the composition of fauna associated with Pocillopora spp. (Scleractinia, Pocilloporidae) following transplantation
(2023-04-30)Introduction: Associated fauna comprises most of the diversity of a coral reef and performs ecological functions essential to the reef’s survival. Since Pocillopora corals harbor an important associated fauna, reef ... -
Changes in abundance and composition of a Caribbean coral reef zooplankton community after 25 years
(2016)Coral reef zooplankton represents a key community in coral ecosystems, as they are involved in trophic and biogeochemical dynamics, and recruitment processes. Zooplankton abundance, composition and biomass were surveyed ... -
Changes in escape behaviour of black iguanas (Ctenosaura similis) over an anthropogenic disturbance gradient
(2021)Studies on the impact of human activity on animal behaviour are critical for understanding the extent to which humans affect ecological dynamics. Previous studies have found that human presence alters antipredator behaviours, ... -
Changes in nesting sites abundance and their use by woodpeckers along an urban gradient: a ten-year comparison
(2019)Woodpeckers nesting substrate abundance may be reduced by urban expansion, negatively affecting their reproduction. Long-term studies in the tropics are rare but valuable to estimate how urban development has affected ... -
Chapter 10 - Quality Control Measures in the Analytical Laboratory
(Academic Press, 2018) -
Chapter 6: Founder variations in isolated populations
(2020)Isolated populations, also called population isolates and genetic isolates, present several characteristic features that make them useful in the study of the genetic basis of both Mendelian and complex disorders. The ... -
Characteristics of male Spot-bellied Bobwhite (Colinus leucopogon) song during territory establishment
(2012)In song-learning birds, male song shows a large inter-individual variation that frequently plays an important role in intra- and inter-sexual selection. In other bird groups, such as Galliformes, song learning is absent, ... -
Characteristics of the capture threads of Synotaxus sp. (probably S. turbinatus) webs (Araneae, Synotaxidae)
(2009)Synotaxus spiders have independently evolved aerial, planar webs to intercept and retain prey, but these webs differ in several respects from planar araneoid webs with similar functions. The silk capture threads of Synotaxus ... -
Characteristics of the cocoon and natural history of the gregarious Meteorus restionis sp. n. (Hymenoptera, Braconidae, Meteorinae) from Costa Rica
(2011)A new species of a gregarious Meteorus wasp (Braconidae) constructs an unusual cocoon mass. Meteorus restionis sp. n. is described and distinguished from similar species. Cocoons of M. restionis are dark-brown, ovoid, and ... -
Characterization and phylogenetic relationships of strains of Dengue type 1 virus from Costa Rica
(Rev. Biol. Trop. (Int. J. Trop. Biol.), vol. 55, n. 2, 2007, 2007)Phylogenetic analysis of the envelope gene sequence (E) of three isolated Dengue virus type 1 (DEN- 1) sequences from the Costa Rican 1993 epidemic was performed. All the strains fell into genotype V. Genotype V has grouped ... -
Characterization of a Bacillus thuringiensis strain collection isolated from diverse Costa Rican natural ecosystems
(Universidad de Costa Rica, 2006-03-19)Como los ecosistemas naturales de Costa Rica figuran entre los más diversos del mundo, se propuso aislar la bacteria entomopatógena Bacillus thuringiensis (Bt) con el fin de conformar una colección de cepas y caracterizarlas ... -
Characterization of Batrachochytrium dendrobatidis Inhibiting Bacteria from Amphibian Populations in Costa Rica
(2017)Global amphibian declines and extinction events are occurring at an unprecedented rate. While several factors are responsible for declines and extinction, the fungal pathogen Batrachochytrium dendrobatidis (Bd) has been ...