Results 71 to 80 of about 50,390 (204)
Conducta sexual y signos del celo en ganado mestizo de doble propósito
Revista Científica, 2010 En una finca de ganadería de doble propósito ubicada en la cuenca del Lago de Maracaibo, en una zona de Bosque Húmedo Tropical, se observó la interacción sexual natural de un rebaño constituido por 300 vacas mestizas (Bos taurus x Bos indicus); fueron ...
Lílido Nelson Ramirez Iglesia +4 more
doaj
Brazilian Journal of Biology, 2013 The focus of this study is to investigate if microcrustaceans undergo diel horizontal migration (DHM) in a tropical shallow lake on a yearly basis and analyse the adaptive value regarding predation.
MS. Arcifa +3 more
doaj
Forestry, geology and hydrological investigations from ERTS-1 imagery in two areas of Ecuador, South America [PDF]
The author has identified the following significant results. In the Oriente area, well-drained forests containing commercially valuable hardwoods can be recognized confidently and delineated quickly on the ERTS imagery.
Moreno, N. V.
core +1 more source
Ecological studies on some lakes of the Amazon valley
, 1967 Of the three types of lakes studied, clear water, white water, and brown water, the white water lakes are the only ones to have a reasonable autochtonous production of organic matter. Owing probably to the lack of mineral salts, the primary production is
Marlier, G.
core
The distribution of Hemiragis aurea (Brid.) Ren. & Card. (Hookeriaceae, Musci) and related notes of interest [PDF]
, 2000 The horizontal and vertical range of Hemiragis aurea (Musci) is subdivided into four regions: I - N. Panama, Costa Rica, S. Nicaragua; II - circum-Caribbean; III - Guyana Highlands; IV - Andean.
Kuc, Marian
core
Pentatomidae (Heteroptera) of Honduras : a checklist with description of a new ochlerine genus [PDF]
, 2003 Through collecting, surveys of museum collections, and search of the literature, we are able to list 181 species of Pentatomidae as occurring within the boundaries of the Republic of Honduras.
Arismendi, Nolberto, Thomas, Donald B.
core +1 more source
Tensions and Adaptation in Tropical Medicine: Lagos in the Networks of Malaria Science, 1890s–1906
West Bohemian Historical Review, 2021 This paper probes into the wide array of networks that shaped malaria control in the colonial Lagos during the nineteenth and twentieth centuries. It highlights the role of tropical locales in the production of medical knowledge, emphasizing the ways colonial doctors read and contributed to imperial discourses on tropical diseases.
openaire +2 more sources
Dyna, 2013 Se investigó la evolución estacional de la estructura térmica en el embalse tropical La Fe, con base en información de variables físicas del cuerpo de agua y variables climatológicas obtenidas en los años 2010 y 2011 y en la aplicación del modelo ...
RICARDO ROMÁN-BOTERO +2 more
doaj
Review of river fisheries valuation in Central and South America [PDF]
, 2008 Unlike Africa and Asia, where a large part of the population are heavily dependent upon fishing for their livelihoods, fishing for a living in the interior of Central and South America (CSA) remains a marginal occupation for all but the most isolated of ...
Bennett, E., Thorpe, A.
core +1 more source
Basic limnology of Lago Bonilla, a Tropical lowland lake
, 2015 El lago Bonílla se localiza a 370 m sobre el nivel del mar, en la vertiente oriental del Volean Turrialba, Costa Rica. El lago fue visitado cuatro veces en un año, durante las cuales se colectó la información Iimnológica básica. El lago es monomíctico tibio, circulando durante los meses más fríos y ventosos del año, de Noviembre a Febrero. Se clasificó
openaire +1 more source