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Now showing items 111-120 of 532
Evaluación breve de la presencia de diatomeas y su relación con algunos parámetros físico-químicos en el río Pirro, Heredia, Costa Rica
(Universidad Nacional (Costa Rica), 2017-07)
La evaluación de la calidad de agua en ecosistemas fluviales en áreas urbanas en el trópico, basada en
la utilización de diatomeas, es escasa. Este estudio exploratorio pretendió establecer la composición y riqueza de ...
Caracterización de la respuesta de las comunidades locales a la infl uencia directa de la variabilidad climática en el Caribe Sur de Costa Rica
(Universidad Estatal a Distancia, 2019)
La variabilidad climática provoca impactos sobre los ecosistemas marino-costeros, además de la afectación de los recursos naturales, paisajes y las comunidades costeras vinculadas. Tales comunidades pueden adaptarse a estos ...
Historical demography of the Caribbean spiny lobster Panulirus argus (Latreille, 1804) (Decapoda: Achelata: Palinuridae) in the Florida Keys, USA inferred using single nucleotide polymorphisms (SNPs)
(Oxford University Press, 2019)
The Caribbean spiny lobster Panulirus argus (Latreille, 1804) is an important species in shallow-water coral reefs and target of the most lucrative fishery in the Caribbean Sea. We explored historical demography in P. argus ...
Influence of oceanographic conditions on nesting abundance, phenology and internesting periods of east Pacific green turtles
(Springer Verlag, 2019)
Sea turtles are migratory animals that travel from foraging grounds to specifc nesting beaches every few years and that,
therefore, can be infuenced by oceanographic conditions in several diferent habitats. We assessed ...
Dietary resource overlap among three species of frugivorous bat in Costa Rica
(Cambridge University Press, 2019-05-03)
The maintenance of biodiversity in tropical forests is thought to be dependent on fine-scale
mechanisms of niche partitioning that allow species to coexist. This study examined whether
three species of short-tailed fruit ...
Isolation on a remote island: genetic and morphological differentiation of a cosmopolitan odonate
(Nature Publishing Group, 2019-06-01)
Although low levels of genetic structure are expected in highly widespread species, geographical and/or ecological factors
can limit species distributions and promote population structure and morphological differentiation. ...
Growth and hydrogen production by three Chlamydomonas strains cultivated in a commercial fertilizer
(Elsevier Ltd, 2019-04-19)
In the present investigation, we report the growth and hydrogen production of two wild
type Chlamydomonas reinhardtii strains isolated from a tropical oxidation pond in Costa Rica.
The performance of these two new isolates ...
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 ...
Beta diversity and oligarchic dominance in the tropical forests of Southern Costa Rica
(Blackwell Publishing Ltd, 2019-03)
Recent studies have reported a consistent pattern of strong dominance of a small
subset of tree species in neotropical forests. These species have been called “hyperdominant” at large geographical scales and “oligarchs” ...
Changes in digestive enzymes activities during the initial ontogeny of wolf cichlid, Parachromis dovii (Perciformes: Cichlidae)
(Sociedade Brasileira de Ictiologia, 2019)
Wolf cichlid, Parachromis dovii, is a species with a high potential for aquaculture in Central America; however, the knowledge of the digestive physiology in larvae period is limited. For these reason, this study evaluated ...