Results 91 to 100 of about 50,390 (204)
Temporal variation of phytoplankton in a small tropical crater lake, Costa Rica
Revista de Biología Tropical, 2010 The temporal variation in lake’s phytoplankton is important to understand its general biodiversity. For tropical lakes, it has been hypothesized that they follow a similar pattern as temperate ones, on a much accelerated pace; nevertheless, few case ...
Gerardo Umaña-Villalobos
doaj
Antiprotozoal activity of flavonoids from Eupatorium arnottianum [PDF]
, 2017 Dichloromethane and ethanol extracts of Eupatorium arnottianum were evaluated for invitroleishmanicidal activity. The dichloromethane extract produced 80% and 85% of growthinhibition on both Leishmania mexicana and Leishmania amazonensis promastigotes ...
Cazorla, Silvia Ines +7 more
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Revista Chilena de Historia Natural, 2001 Eutrophic temperate and sub-tropical lakes often exhibit a marked vertical structure during the warm season that involves important spatial differences of physical, chemical and biological variables.
RODRIGO RAMOS-JILIBERTO +1 more
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Preliminary data on movements and health condition of the first radio-collared huemul (Hippocamelus bisulcus) population study in Argentina [PDF]
, 2018 Aun cuando solo quedan menos de 500 ejemplares de huemul patagonico (Hippocamelus bisulcus) en Argentina, existe escasa información sobre su ecología y dinámicas poblacionales.
Escobar Ruiz, Miguel +2 more
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, 1985 Analysis of Amazonian freshwater fish exhibited great differences in water- and fat content. Migratory species which deposit huge amounts of eggs in a single spawning act accumulate at high water-level great amounts of fat in various parts of the body ...
Junk, W.
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The past history and present trends in the fisheries of Lake Chad [PDF]
, 1993 Lake Chad is a very large, shallow eutrophic lake shared by Chad, Nigeria, Niger and Cameroun. It supplies approximately 13% of Nigeria's inland fish. It however lies in an unstable ecological environment characterised by intermittent period of rainfall ...
Raji, A.
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Factores que afectan la producción de leche en vacas mestizas Criollo Limonero x Holstein
Revista Científica, 2010 Con el propósito de estudiar los factores genéticos, fisiológicos y ambientales que afectan la producción de leche en vacas mestizas Criollo Limonero, se analizaron 106 registros de lactancias pertenecientes a vacas mestizas G1: ½ Holstein x ½ Criollo
Gloria Contreras +4 more
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, 2016 ABSTRACT: In this paper the morphometric characteristics of Hoyo swamp’s in Los Bagres (Colombia) and the theoretical predictions made from these characteristics are presented. The swamp was characterized as a shallow system with a large area about the size of the water column, the shape of a convex conical depression without turning points in V shape,
Vélez Macías, Fabio de Jesús +1 more
openaire +1 more source
The beetles of St. Lucia, Lesser Antilles (Insecta: Coleoptera): diversity and distributions [PDF]
, 2009 The published beetle fauna of the island of St. Lucia is summarized. It contains 135 genera, and 175 species in 25 families. Four species are accidentally introduced by human activities. Twenty three species are endemic (restricted) to the island. Twenty
Peck, Stewart B.
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Biogeoquímica del mercurio en el lago tropical de altura Uru Uru (Altiplano boliviano)
, 2016 En la región del Altiplano boliviano, de condiciones ambientales extremas (3700 m.s.n.m. de altitud, elevada radiación UV, menor disponibilidad de O2), se encuentra el lago Uru Uru. De aguas poca profundas (0-1 m), elevada gradiente en la salinidad de sus aguas y alta productividad primaria, es impactado por descargas de afluentes mineros y urbanos ...
Alanoca, Lucia +12 more
openaire +2 more sources