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1.
rev. udca actual. divulg. cient ; 26(2): e2428, jul.-dic. 2023. tab, graf
Article in Spanish | LILACS-Express | LILACS | ID: biblio-1576975

ABSTRACT

RESUMEN El río Hacha ubicado en Florencia-Caquetá, Colombia, abastece agua para el consumo humano y proporciona otros servicios ecosistémicos. Las actividades antrópicas han generado una presión en este recurso natural. Se realizó una valoración económica de la calidad de agua y los servicios recreativos en los balnearios del corredor vial del río. Se establecieron cuatro puntos en el tramo para medir indicadores fisicoquímicos del agua. Se realizó una encuesta en una muestra de 460 personas, cuyo análisis empleó los métodos de costo-viaje y valoración contingente. Se encontró que los indicadores de calidad de agua no exceden los límites permisibles para contacto primario. La recreación en los sitios genera beneficios económicos para la demanda local: la variación del excedente del consumidor ante un proyecto hipotético de mejora en la calidad del agua fue positiva. La disposición a pagar por hogar por una mejora en la calidad del agua asciende a $9.984,04 por año. Esto implica que existe un potencial de aprovechamiento sostenible en los servicios ecosistémicos asociados a la recreación en el recurso hídrico.


ABSTRACT The Hacha river located in Florencia-Caquetá, supplies water for human consumption and provides other ecosystem services. Anthropic activities have generated pressure on this natural resource. An economic valuation was made of water quality and recreational services in the river's road corridor resorts. Four points were established along the stretch to measure physicochemical water indicators. A survey was conducted on a sample of 460 people whose analysis employed the Cost-Travel and Contingent Valuation methods. It was found that the water quality indicators do not exceed the permissible limits for primary contact. Recreation at the sites generates economic benefits for local demand: the variation in consumer surplus for a hypothetical water quality improvement project was positive. The willingness to pay (WTP) per household for an improvement in water quality amounts to $2.12 dollars per year. This implies that there is a potential for sustainable use of the ecosystem services associated with water resource recreation.

2.
Iheringia, Sér. zool ; 104(4): 478-481, 2014.
Article in English | VETINDEX | ID: biblio-1482843

ABSTRACT

A new species of gall midge, Lopesia eichhorniae sp. nov. (Cecidomyiidae, Diptera), associated with rhizomes of Eichhornia azurea (Sw.) Kunth (Pontederiaceae) is described. This is the first record of Lopesia galls in this species of macrophyte, quite common in natural and artificial lakes in Southeast Brazil. Illustrations of the adults (male and female), pupa, larva, and gall of the new species are presented.


Uma espécie nova de cecidomiídeo galhador, Lopesia eichhorniae sp. nov. (Cecidomyiidae, Diptera), associada a rizomas de Eichhornia azurea (Sw.) Kunth (Pontederiaceae) está sendo descrita neste trabalho. Esse é o primeiro registro de galhas de Lopesia nessa espécie de macrófita, muito comum em lagos naturais e artificiais na região Sudeste do Brasil. Ilustrações de adultos e imaturos da espécie nova e de suas galhas são apresentadas.


Subject(s)
Animals , Diptera/classification , Species Specificity , Insecta , Plant Tumors/parasitology
3.
Iheringia. Sér. Zool. ; 104(4): 478-481, 2014.
Article in English | VETINDEX | ID: vti-11895

ABSTRACT

A new species of gall midge, Lopesia eichhorniae sp. nov. (Cecidomyiidae, Diptera), associated with rhizomes of Eichhornia azurea (Sw.) Kunth (Pontederiaceae) is described. This is the first record of Lopesia galls in this species of macrophyte, quite common in natural and artificial lakes in Southeast Brazil. Illustrations of the adults (male and female), pupa, larva, and gall of the new species are presented.(AU)


Uma espécie nova de cecidomiídeo galhador, Lopesia eichhorniae sp. nov. (Cecidomyiidae, Diptera), associada a rizomas de Eichhornia azurea (Sw.) Kunth (Pontederiaceae) está sendo descrita neste trabalho. Esse é o primeiro registro de galhas de Lopesia nessa espécie de macrófita, muito comum em lagos naturais e artificiais na região Sudeste do Brasil. Ilustrações de adultos e imaturos da espécie nova e de suas galhas são apresentadas.(AU)


Subject(s)
Animals , Diptera/classification , Insecta , Plant Tumors/parasitology , Species Specificity
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