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Habitat structure and small mammals abundances in one semiarid landscape in the Brazilian Caatinga Zoologia
Freitas,Rodrigo R.; Rocha,Pedro Luís B. da; Simões-Lopes,Paulo César.
Studies conducted under a major project sponsored by the Brazilian Academy of Sciences in the 1970's concluded that the small mammal fauna of the semiarid Caatinga region of Brazil is impoverished and highly restricted to mesic granite outcroppings due to the lack of water conserving physiological capabilities in its species. This work focuses the abundance of small mammals in five typical Caatinga habitats. Indirect gradient analysis shows that three theoretical environmental variables explain most of the variance present in the community abundance matrix. Direct analysis of gradients show that none of these variables is highly correlated to availability of granite outcroppings. Our data also suggest that the abundances in Caatinga are not particularly...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Adaptability; Capture success; Electivity; Gradient analysis; Richness.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752005000100015
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Analysis of the marine shrimp culture production chain in Southern Brazil Anais da ABC (AABC)
Freitas,Rodrigo R.; Vinatea,Luis; A. Netto,Sérgio.
This study was elaborated to identify and describe the main links of the sea shrimp productive chain in the municipal district of Laguna, historically known as the main sea shrimp (Litopenaeus vannamei) production area in the State of Santa Catarina, Brazil. The study, held from April to July 2005, previously identified the local productive process through observation, interviews and bibliographical research. Afterwards, specific questionnaires were elaborated for each of the several segments connected to the local activity. A total of 90 interviews were conducted, intending to map out the procedures and functionality of the productive chain, from the necessary inputs for production to the moment of shrimp acquisition by final consumers. Results indicated...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Litopenaeus vannamei; Marine shrimp culture; Production risks; Supply chain.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652009000200015
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Evaluation of space adequateness of shrimp farms in Southern Brazil Anais da ABC (AABC)
Freitas,Rodrigo R.; Hartmann,Carlos; Tagliani,Paulo R. A.; Poersch,Luís H..
In Rio Grande do Sul State, there are four marine shrimp (Litopenaeus vannamei) farms in the municipal districts of São José do Norte and Rio Grande, and other four with previous license for operation. Thus, the present study aimed to identify and characterize areas for marine shrimp farming located in the Southern portion of the Patos Lagoon estuary (32º00'S 52º00'W) by employing the analysis of satellite remote sensing (Landsat TM and ETM+/Google Earth), airborne remote sensing (35mm system ADAR 1000), terrestrial remote sensing (RICOH 500SE), and field expeditions, integrating data in a Geographical Information System (IDRISI Andes). As a result, the enterprises were built on coastal fields or in obliterated dune areas, which are favorable for...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Costal management; GIS; Patos Lagoon; Shrimp farms.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000300025
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