Browsing Artículos científicos by Title
Now showing items 474-493 of 555
-
Saxitoxin Poisoning in Green Turtles (Chelonia mydas) Linked to Scavenging on Mass Mortality of Caribbean Sharpnose Puffer Fish (Canthigaster rostrata-Tetraodontidae)
(Frontiers Media (Suiza), 2019-12-17)Fish within the family Tetraodontidae are potential sources of both endogenous tetrodotoxins (TTXs) and dietary derived saxitoxins (STXs). Ingestion of fish tissues containing these toxins by other vertebrates can lead ... -
Scorpion maintenance in captivity for venom extraction in Costa Rica
(Revista de Biologia Tropical Vol.64 No.3 1019-1027, 2016-04-04)Approximately 2 000 scorpion species can be found around the world; although few species are considered “harmful” to human beings, a high number of scorpionism cases are reported all over the world. The ... -
Seasonal changes of phytoplankton in the Paquera-Tambor Marine Area for Responsible Fishing, Gulf of Nicoya, Costa Rica
(Universidad Nacional (Costa Rica), 2016-07)The implementation of Marine Areas for Responsible Fishing (MARF) is a tool for fisheries management; therefore, baseline studies play an important role in understanding the ecological dynamics from the bases of the food ... -
Seasonal Guild Variation of a Bat Assemblage in an Agricultural Landscape of a Tropical Dry Forest of Costa Rica
(Instituto Tecnológico de Costa Rica, 2019-07)In Costa Rica, the tropical dry forest is restricted into the North Pacific, being one of the few remnants of the Mesoamerican dry forest. This forest presents remarkable climatic variation throughout the year, especially ... -
Seasonal impact of grazing, viral mortality, resource availability and light on the group‑specifc growth rates of coastal Mediterranean bacterioplankton
(Nature Research, 2020-12)Estimation of prokaryotic growth rates is critical to understand the ecological role and contribution of diferent microbes to marine biogeochemical cycles. However, there is a general lack of knowledge on what factors ... -
Selección cualitativa del esqueje en la sobrevivencia y desarrollo morfogenético de Vanilla planifolia Andrews
(Universidad de Costa Rica (Costa Rica), 2018)En Costa Rica, es necesario un programa nacional de conservación ex situ para Vanilla planifolia por su rareza, peligro de extinción en condiciones silvestres y por la importancia económica que la ubica como la orquídea ... -
Selección de hábitat de Lontra longicaudis (Carnivora, Mustelidae) bajo la influencia de la represa hidroeléctrica del río Peñas Blancas y sus tributarios, Alajuela, Costa Rica
(Universidad Nacional (Costa Rica), 2017-01-31)Los cambios producidos por actividades humanas sobre los ecosistemas acuáticos reducen y reconfiguran los hábitats disponibles. Por ello, el objetivo de este estudio fue evaluar la selección de ... -
Selección de plantas para el control de la erosión hídrica en Costa Rica mediante la metodología de criterio de expertos
(Centro Agronómico Tropical de Investigación y Enseñanza (CATIE) (Costa Rica), 2011)En Costa Rica, la utilización de plantas para el control de la erosión es escasa y poco documentada. Este estudio identificó, mediante la metodología de criterio de expertos, especies vegetales utilizadas para dicho ... -
Serpocaulon orosiense, a New Hybrid of Serpocaulon (Polypodiaceae) from Costa Rica
(Universidad Nacional (Costa Rica), 2021-11-08)Se han descrito cuatro híbridos entre especies de Serpocaulon, uno de ellos S. × sessilipinnum fue el único híbrido conocido entre dos clados diferentes propuesto por Smith et al. En este trabajo se describe un nuevo híbrido ... -
Shifts in bacterioplankton community structure between dry and wet seasons in a tropical estuary strongly affected by riverine discharge
(Elsevier (Países Bajos), 2023-12)Estuaries are among the most productive ecosystems in the world and are highly dynamic due to the interaction of freshwater and seawater, which results in strong spatial gradients in physico-chemical conditions. ... -
Simulación de una cohorte de Anchoa Panamesis (Steindachner, 1975) en el Golfo de Nicoya, Costa Rica
(Universidad Nacional [Costa Rica], 1987-01-01)Se aplica el modelo de simulación de stock de Jansen a una cohorte hipotético de 100.000 peces de Anchoa panamensis, utilizando una tasa de mortalidad natural de 0.274 mensual, obtenida para esta población en 1981 y dos ... -
Skin texture change in diasporus hylaeformis (Anura: Eleutherodactylidae
(Sociedad Herpetologica Mexicana, 2020-11)La Rana Martillito de Altura, Diasporus hylaeformis, fue observada mostrando un cambio de textura de la piel durante una sesión fotográfica. Se ha sugerido que este comportamiento, reportado recientemente en anuros, puede ... -
Snake diversity (squamata: Serpentes) in Quebrada González sector of Braulio Carrillo National Park, Costa Rica
(Malcolm L. McCallum, 2019-04-30)Within Braulio Carrillo National Park (BCNP) of Costa Rica, there is a lack of quantitative data regarding the snake community despite its informally reported abundance and relevance to human health. The objective of this ... -
Social effects in growth experiments. Growth of jaguar guapote (Cichlasoma managuense) in isolation and in small groups
(Universidad Nacional (Costa Rica), 1997)Se evaluaron el crecimiento y la conversión alimenticia de juveniles de guapote tigre (Cichlasoma managuense) mantenidos a densidades constantes de 1, 2, 5, 10 y 20 individuos por pecera. La densidad mostró una correlación ... -
Spatial variation of physicochemical parameters in a constructed wetland for wastewater treatment: An example of the use of the R programming language
(Universidad Estatal a Distancia (Costa Rica), 2021-06)Introduction: The implementation of wastewater treatment systems such as constructed wetlands has a growing interest in the last decade due to its low cost and high effectiveness in treating industrial and residential ... -
Species diversity and distribution of genus Pampus (Pelagiaria: Stromateidae) based on global mitochondrial data
(Universidad Nacional (Costa Rica), 2022-12-13)Due to the highly similar external morphology of the Pampus species, misidentifications frequently occur and hinder the understanding of the taxonomy and species distributions of the genus. In this study, we generated 271 ... -
Spontaneous spawning in captivity of the first generation hatchery-produced weakfish, Cynoscion squamipinnis (Perciformes: Sciaenidae)
(Universidad Nacional (Costa Rica), 2017-01)The aim of this study was to evaluate the spontaneous spawning of the first generation of weakfish (Cynoscion squamipinnis) reared in captivity in order to conduct restocking programs and mariculture projects. Juveniles ... -
Spontaneous spawning, ontogeny and growth in captivity of Cynoscion squamipinnis
(Universidad de Costa Rica, 2016-09-03)The croakers or drums are commercial species, which have been overfished in the Nicoya Gulf, Costa Rica. This study aimed to describe, for the first time, the reproduction and the ontogeny of weakfish, Cynoscion squamipinnis ... -
Spotted rose snapper (Lutjanus guttatus) aquaculture research and development as socio-economic alternative for Costa Rican fishing communities
(2010-06-01)The spotted rose snapper (Lutjanus guttatus) is one of the main target coastal species, but landings are decreasing in quantity and size. Reports include a mean capture size of 50 cm with gill nets and 38 cm with bottom ... -
Strategy of bioremediation in recirculating aquaculture systems using constructed microbial mats
(Journal of Chemical, Biological and Physical Sciences, 2014-11-30)Due to strict international standards, every day there is greater interest in developing environmentally sound treatment systems in aquaculture facilities that can remove contaminants from effluent and allows for the reuse ...
