Listar Biología por título
Mostrando ítems 614-633 de 1615
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Evaluación del hábitat, comportamiento y riesgo de las tropas de monos congo (Alouatta palliata) en búsqueda de la sostenibilidad con fines turísticos, en Playa Hermosa, Guanacaste
(2022-04-06)El hábitat de una especie debe mantenerse en condiciones esenciales para su sobrevivencia. Estas condiciones corresponden a elementos como los son la cobertura forestal, alimento, agua, condiciones climáticas, pendientes ... -
Evaluación del papel del sexo y las etapas reproductivas en los procesos de comunicación acústica en el murciélago de ventosas thyroptera tricolor (Chiroptera: thyropteridae)
(2022)El comportamiento es uno de los rasgos más variables dentro del reino animal. Sin embargo, aún hay poca claridad sobre cuáles son los factores que inciden en su variabilidad. En muchas especies se sabe que con el inicio ... -
Evaluating factors that predict the structure of a commensalistic epiphyte–phorophyte network
(2013)A central issue in ecology is the understanding of the establishment of biotic interactions. We studied the factors that affect the assembly of the commensalistic interactions between vascular epiphytes and their host ... -
Evaluation of pharmacological therapies used in Costa Rica in patients with metastatic gastric cancer: a retrospective study
(2019-01-18)Background: Gastric cancer is one of the leading causes of cancer death worldwide. Surgery is regarded as the best curative treatment option for gastric cancer; however, a high proportion of cases are diagnosed at advanced ... -
Evaluation of the expression of the oncogen C-ERBB-2/HER2 in advanced gastric cancer cases from Costa Rica
(2019-09-19)Justification: The prevalence of gastric cancer (GC) with increased expression of the HER2 oncoprotein shows important variations worldwide. Incidence and mortality rates of GC in Costa Rica are among the highest in Latin ... -
Evidence for Widespread Associations between Neotropical Hymenopteran Insects and Actinobacteria
(2017)The evolutionary success of hymenopteran insects has been associated with complex physiological and behavioral defense mechanisms against pathogens and parasites. Among these strategies are symbiotic associations between ... -
Evidence of maternal provisioning of alkaloid-based chemical defenses in the strawberry poison frog Oophaga pumilio
(2014)Many organisms use chemical defenses to reduce predation risk. Aposematic dendrobatid frogs sequester alkaloid-based chemical defenses from a diet of arthropods, but research on these defenses has been limited to adults. ... -
The evolution of prey‐wrapping behaviour in spiders
(2007)We traced the evolution of silk use by spiders in attacks on prey by combining previous publications with new observations of 31 species in 16 families. Two new prey‐wrapping techniques are described. One, in which the ... -
Evolution of Seed Dispersal Modes in the Orchidaceae: Has the Vanilla Mystery Been Solved?
(2023)Orchid seeds are predominantly wind-dispersed, often developed within dry, dehiscent fruits that typically release millions of dust-like seeds into the air. Animal-mediated seed dispersal is a lesser-known phenomenon in ... -
Evolutionary diversification and historical biogeography of orchidaceae in Central America with emphasis on Costa Rica and Panama
(2019)In this thesis, I targeted the orchid genus Lepanthes, one of the six genera of angiosperms that surpasses 1,000 species in the Neotropics, as a study model to investigate the evolutionary processes that promoted species ... -
Evolutionary history and systematics of Campylocentrum (Orchidaceae: Vandeae: Angraecinae): a phylogenetic and biogeographical approach
(2018)Subtribe Angraecinae (Orchidaceae: Vandeae) are mainly distributed in Africa, but with two genera, Campylocentrum and Dendrophylax, restricted to the Neotropics. As a widespread Neotropical genus, Campylocentrum constitutes ... -
Evolutionary history of the reef fish Anisotremus interruptus (Perciformes: Haemulidae) throughout the Tropical Eastern Pacific
(2020)The Tropical Eastern Pacific (TEP) is a dynamic coastal environment characterized by a complex system of oceanic processes and discontinuous rocky habitats. These features, in conjunction with the ecological and physiological ... -
Expanding the application scope of on-farm biopurification systems: Effect and removal of oxytetracycline in a biomixture
(2017)Antibiotic-containing wastewaters produced in agricultural activities may depress the pesticidedegrading capacity of biomixtures contained in biopurification systems. This work aimed to assay the effect of oxytetracycline ... -
Experimental demonstration of possible cryptic female choice on male tsetse fly genitalia
(J. Insect Physiol. 2009 Nov; 55(11): 989-996, 2009)A possible explanation for one of the most general trends in animal evolution – rapid divergent evolution of animal genitalia – is that male genitalia are used as courtship devices that influence cryptic female choice. ... -
Experimental modifications imply a stimulatory function for male tsetse fly genitalia, supporting cryptic female choice theory
(THE AUTHORS. J. EVOL. BIOL. 22 (2009) 151 6-1525 JOURNAL COMPILATION, 2009)One of the most sweeping of all patterns in morphological evolution is that animal genitalia tend to diverge more rapidly than do other structures. Abundant indirect evidence supports the cryptic female choice (CFC) ... -
Exploración del Everest en la zona mesofótica del Parque Nacional Isla del Coco
(2021)Video realizado para difundir el proyecto 810-C1-081 "Estructura y biodiversidad de las comunidades de coral mesofóticas en el Parque Nacional Isla del Coco", que tiene como principal objetivo describir el monte Everest, ... -
Exploring farmer preferences towards innovations in the vanilla supply chain
(2021-11)The vanilla supply chain is characterized by high risk crop management and unstable supply. In order to meet global vanilla demand while improving production sustainability, new approaches considering agro-ecological ... -
Expresión de genes relacionados al sistema de defensa de dos variedades de café (Coffea Arabica) mediante el uso de inductores de resistencia contra el patógeno de la roya (Hemileia vastatrix)
(2022)El objetivo de esta investigación fue analizar la expresión 6 genes relacionados con el sistema de defensa café (Coffea arabica L.) contra el patógeno de la roya (Hemileia vastatrix) al aplicar AS y FP en plantas var. Obatá ... -
Expression analysis of two SOMATIC EMBRYOGENESIS RECEPTOR KINASE (SERK) genes during in vitro morphogenesis in Spanish cedar (Cedrela odorata L.)
(2018-11-08)Somatic embryogenesis (SE) is one of the most important steps during regeneration, but the molecular mechanism of SE remains unclear for Cedrela odorata. SOMATIC EMBRYOGENESIS RECEPTOR-LIKE KINASE (SERK) is one of the genes ...