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Actividad antimutagénica e identificación de compuestos antioxidantes en la planta Poincianella bracteosa (Fabaceae)

Abstract: Introduction: Poincianella bracteosa (Tul.) L.P. Queiroz. (Fabaceae), known as catingueira, is traditionally used in medicine to treat diarrhea, hepatitis and anemia. However, there are no studies on their toxicogenetic effects. Objective: The present study

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Cryptic molecular diversity in the morphologically variable rotiferan Brachionus quadridentatus (Rotifera: Monogononta)

Abstract: Brachionus quadridentatus is a morphologically variable species of rotifer distributed worldwide. The taxonomy of this species is confused, with numerous infrasubspecific variants described in the taxon: B. quadridentatus quadridentatus, B. quadridentatus f.

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Temporal variation of bird assemblages in dynamic fluvial wetlands: seasonality and influence of water level and habitat availability

Abstract: Introduction: Study of temporal variation of bird assemblages may be particularly important in highly dynamic ecosystems as fluvial wetlands to identify the factors that influence and contribute to maintain regional bird diversity. Objective: To study tempo

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Variación fenotípica del erizo Eucidaris tribuloides (Cidaroida: Cidaridae) en el Corredor Arrecifal del Suroeste del Golfo de México

Abstract: Introduction: Intraspecific morphological variation can be attributed to the result of genetic variation or influence of environmental heterogeneity. In the latter case, organisms are exposed to diverse environmental conditions which have an influence on the

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Morfoanatomía e histoquímica de Hypericum juniperinum (Hypericaceae)

Abstract: Hypericum is a genus that belongs to the Hypericaceae family, with has 469 species of herbs, trees and shrubs. Two sections in particular, Brathys and Trygynobrathys are an integral part of the Paramo flora. Hypericum genus has a wide variety of metabolites t

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Distribución potencial del cerdo asilvestrado, Sus scrofa (Artiodactyla: Suidae) y el pecarí de collar, Pecari tajacu (Artiodactyla: Tayassuidae) en la región de Laguna de Términos, México

Abstract: Introduction: The presence of feral pigs (Sus scrofa) in addition to habitat fragmentation at Laguna de Términos, Campeche, could cause changes in the distribution patterns and presence of collared peccaries (Pecari tajacu). Objective: Modelling of potentia

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Population status of the American crocodile, Crocodylus acutus (Reptilia: Crocodilidae) and the caiman, Caiman crocodilus (Reptilia: Alligatoridae), in the Central Caribbean of Costa Rica

Abstract: Two species of crocodilians have been described in Costa Rica, American crocodile, Crocodylus acutus (Cuvier, 1807), and caiman, Caiman crocodilus (Linnaeus 1758). In Costa Rica, data has been generated on both species, but populations in the Pacific have rec

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Laguncularia racemosa (Combretaceae) y bacterias terrestres asociadas medio siglo después de la contaminación crónica por hidrocarburos

Abstract: The evaluation of the impact of oil on the soil-root interaction of the white mangrove plant, Laguncularia racemosa is essential to identify changes in microbial activity and biotechnological potential for remediation contaminated histosols. The objective was

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Projected impact of global warming on the distribution of two pocket mouse species with implications on the conservation of Heteromys nelsoni (Rodentia: Heteromyidae)

Abstract: Introduction: Understanding how species respond to climate change is critical for implementing conservation strategies. Objective: We explain through potential distributions and changes in altitudinal variation, the possible impacts of climate change in an

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Successional trajectories of secondary forests and tree plantations in Costa Rican lowlands

Abstract: Tree plantations used for carbon sequestration or forest restoration often support diverse plant communities. However, it is unknown how rates of successional change in tree plantations compare to secondary forests. In this study, we compared the successional

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“Ensamblaje” de macroinvertebrados acuáticos y su relación con variables fisicoquímicas en un río de montaña en Colombia

Abstract: Because of the influence of different human activities, rivers and their associated biodiversity are under stress. The aim of this study was to evaluate the diversity of aquatic macroinvertebrates of the Jordán River and its relation to water quality. Mining,

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Scientific literature on Inga (Fabaceae) from Santa Catarina state, Southern Brazil (1983-2017)

Abstract: The genus Inga Mill. belongs to the mimosoid clade (Fabaceae, Caesalpinioideae) that includes 131 species in Brazil. It is the most important genus of Fabaceae. In this sense, this study aimed to perform a bibliometric analysis on Inga from Santa Catarina sta

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Estado poblacional del cucarachero de pantano, Cistothorus apolinari (Passeriformes: Troglodytidae) en siete humedales de la Sabana de Bogotá, Colombia

Abstract: Introduction: The Apolinar’s Wren Cisthotorus apolinari is an endemic species of the Eastern Andes of Colombia currently classified as Critically Endangered (CR) at the national level and Endangered (EN) worldwide, mainly due to the degradation of wetlands, t

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Twenty-year assessment of Lignum-vitae (Guaiacum sanctum, Zygophyllaceae) in the Palo Verde National Park of Costa Rica
Ulises Balza Roland C. De Gouvenain

Abstract: Introduction: The Lignum-vitae (Guaiacum sanctum; Zygophyllaceae) of Mesoamerica and the Greater Antilles, is threatened over much of its range. We evaluated whether a G. sanctum population in the Palo Verde National Park of Costa Rica is viable in the long

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Influencia de las condiciones edáficas sobre la dominancia y diversidad de árboles en bosques pluviales tropicales del Chocó biogeográfico

Abstract: Introduction: The biogeographic Chocó presents an exuberant diversity of arboreal species; however, it is unknown if soils determine this diversity. Objective: Evaluate how edaphic conditions explain the diversity and arboreal dominance in tropical pluvial

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Ontogenia e histoquímica de los esporangios y escamas receptaculares del helecho epífito Pleopeltis macrocarpa (Polypodiaceae)

Abstract: Introduction: The ontogeny of sporangia and furthermore the structure and function of the receptacle scales showed by the sori of some fern species are topics scarcely represented in the scientific literature. Objectives: To describe and analyze the ontogen

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A new genus of semislugs (Stylommatophora: Euconulidae) from Costa Rica and a review of the genus Velifera (Stylommatophora: Euconulidae)
Zaidett Barrientos

Abstract: The family Euconulidae is circumglobal, but only one subfamily, the Euconulinae, occurs in the American continent. Fourteen native euconulids, in three genera, have been reported from Costa Rica. Objective_ In this paper I describe Tikoconus, a new genus of

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The mechanism of plant gall induction by insects: revealing clues, facts, and consequences in a cross-kingdom complex interaction
Omar Gätjens-Boniche

Abstract: Galls are defined as modifications of the normal developmental design of plants, produced by a specific reaction to the presence and activity of a foreign organism. Although different organisms have the ability to induce galls in plants, insect-induced galls

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Diversidad de macro-invertebrados en sistemas silvopastoriles del sur de Quintana Roo, México

Abstract: The diversity of macro-invertebrates is related to the state of disturbance of the soil, caused mainly by the land-use change for agricultural activities. A strategy for the conservation of these organisms is the implementation of diversified production syste

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The effect of green fertilizers on the ecological structure of soil invertebrate communities in an andisol of Southwestern Colombia

Abstract: Introduction: Chemical fertilizers for agriculture can negatively affect the communities of soil invertebrates that contribute to nutrient cycling, nutrient availability, soil formation and fertility. As an alternative, previous work has suggested that green

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Cadmium and morphological alterations in the rotifer Philodina cf. roseola (Bdelloidea: Philodinidae) and the worm Aeolosoma hemprichi (Annelida: Aeolosomatidae)

Abstract: Cadmium is a toxic metal for zooplankton that produces deformations. It is also considered an environmental hazard to aquatic life. Since it has a significant effect in some marine organisms, we used two native zooplankton species from Quintana Roo, Mexico to

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Allelopathic potential of 73 weed species in Pakistan

Abstract: Introduction: Use of allelochemicals as inexpensive, biodegradable and eco-friendly substitutes for the management of weeds in crops is a central topic nowadays. Objective: The current study represented the comprehensive screening of allelopathic activity o

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Molecular systematics of the Dichopetala genus group (Orthoptera: Phaneropteridae)

Abstract: Introduction: The Dichopetala genus group was proposed recently after revision of the genus Dichopetala Brunner von Wattenwyl, 1878. Currently, the group consists of eight genera and 44 species distributed from Southern United States to Southern Mexico. This

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Demography of the land snail Tikoconus (Tikoconus) costaricanus (Stylommatophora: Euconulidae) in tropical low montane and premontane forests, Costa Rica
Zaidett Barrientos

Abstract: Introduction: Ecology and natural history of neotropical land snails is almost unknown. Objetive: In this paper, I analyse the population dynamics of Tikoconus (Tikoconus) costaricanus Barrientos, an understory endemic euconulid. Methods: I compared T. cos

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Edad y crecimiento del pez Fundulus lima (Cyprinodontiformes: Fundulidae) en el río La Purísima, Baja California Sur, México

Resumen: Introducción: El estudio de la edad y crecimiento en peces es un prerrequisto básico para generar información sobre la longevidad, tasas de crecimiento y estructura poblacional, entre otros atributos, todos ellos para la aplicación de políticas enfocadas en

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Sperm kinematics and morphometric subpopulations analysis with CASA systems: a review

Abstract: In recent years, there has been a substantive change in the conceptual paradigm regarding what an ejaculate is. Until recently, it was considered that a representative population (billions) of sperm was made up of "equivalent" cells with a common goal: to be

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Ciclo de vida y enemigos naturales de Mechanitis menapis (Lepidoptera: Ithomiini)

Abstract: The butterflies of the Ithomiini tribe are one of the most-studied biological models of recent years in terms of biogeography, taxonomy, and evolution. However, even though their biology and distribution is better known than many other groups of butterflies,

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Termorregulación de la lagartija Liolaemus chacoensis (Squamata: Liolaemidae) durante su ciclo reproductivo, en el Chaco occidental, Argentina

Abstract: Regulation of body temperature in lizards plays a key role in the survival of species. Their physiological condition, in reference to their dependence on the ambient temperature makes them an excellent study model. Also, changes in the reproductive cycle caus

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Effects of the fungus Pestalotiopsis maculans (Ascomycota: Amphisphaeriales) on the gametophytic development of the fern Lygodium venustum (Lygodiaceae)

Abstract: Lygodium Sw. is the only genus of the family Lygodiaceae, with around 25 to 40 species inhabiting mostly tropical regions worldwide. In Argentina two species develop; one of them, L. venustum, grows in the Northeast of the country. Some species of Lygodium ar

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Caracterización genética de la hormiga Atta cephalotes (Hymenoptera: Formicidae) en Isla Gorgona, Colombia

Resumen: Analizar la variación genética de una población insular de Atta cephalotes en un contexto regional más amplio para América Central y del Sur. Métodos: Se secuenció el gen de la Citocromo oxidasa I de A. cephalotes para las poblaciones de la isla Gorgona y el

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Plankton variation in Río Cuarto Lake, Costa Rica (2013-2017)

Abstract: In tropical lakes, seasonal changes in plankton dynamics are minimal and irregular, since climatic conditions are fairly stable throughout the year, in most cases only long-term studies allow observing patterns in the dynamics of the plankton. Lake Río Cuarto

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Crecimiento y mortalidad de Haemulon plumieri (Perciformes: Haemulidae) en el archipiélago Los Frailes, Venezuela

Resumen: El corocoro margariteño Haemulon plumieri es muy abundante en la región nororiental de Venezuela, pero los aspectos biológicos y pesqueros han sido poco estudiados en este país. El objetivo de este estudio fue estimar el crecimiento y la mortalidad de este re

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