Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 3 of 3
Full-Text Articles in Life Sciences
Ecology, Behavior And Taxonomy Of Anurans From Brazil's Atlantic Forest, Rodrigio Barbosa Ferreira
Ecology, Behavior And Taxonomy Of Anurans From Brazil's Atlantic Forest, Rodrigio Barbosa Ferreira
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Anura is a diverse group with more than 7382 species described, which represents 88% of the species belonging to the Class Amphibia. Anurans are among the first organisms to be affected by environmental stressors, so when they show decline in the wild, it is a warning to other species, including humans. It is alarming that one-third of the world’s anurans are facing extinction. Following the same trend, a substantive portion of the 988 recognized species of the Atlantic Forest have suffered population declines and local extinctions, attributed primarily to habitat changes.
Despite the unique life history characteristics that make amphibians …
Vitamin A Status, Anthropometric Measurements, And Food Practices Of Women Of Childbearing Age And Their Preschool Children In Northeast Brazil, Susan Ahlstrom Henderson
Vitamin A Status, Anthropometric Measurements, And Food Practices Of Women Of Childbearing Age And Their Preschool Children In Northeast Brazil, Susan Ahlstrom Henderson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Vitamin A nutrition status was evaluated in 110 pairs of women and their preschool children at rural health posts in two different ecological regions of Northeast Brazil. Serum retinol and carotene, weight, height, tricep skinfold and mid-arm circumference were measured from each mother and child. Nutrition knowledge of mothers, socioeconomic living conditions and consumption of retinol and carotene food sources were assessed.
Nine children (8 percent) and one mother had less than acceptable serum retinol (less than 20 μg/dl). Additionally, 21 percent of the children and six percent of the mothers had "low" serum carotene levels. Thirty-seven percent and 57 …
The Acarau Valley In Northeast Brazil: Vegetation, Soils And Land Use., Joao Stacishin De Queiroz
The Acarau Valley In Northeast Brazil: Vegetation, Soils And Land Use., Joao Stacishin De Queiroz
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The purpose of this study was to describe and characterize the principal kinds of land in the mid-portion of the Acarau Valley, Ceara State, Northeast Brazil. The specific aims were: (1) to develop a specific-purpose soil classification; (2) to investigate vegetation-environment relationships; (3) to develop hypotheses about short-term vegetation dynamics; and (4) to evaluate the usefulness of computer processed multispectral-scanner (MSS) data for mapping rangeland resources in Northeast Brazil.
Fifty-one soil profiles were described and ocular estimates of vegetation cover by species were made at each subjectively selected site. Two Landsat scenes were used to assess the usefulness of MSS …