Reproductive strategy of Coptotermes gestroi (Isoptera: Rhinotermitidae) in Brazil

The termite Coptotermes gestroi (Wasmann) (Rhinotermitidae) is an exotic species in Brazil. This species forms colonies headed by primary reproductives, however, non-functional neotenics are commonly found even in the presence of the imaginai pair. The presence of non-functional neotenics in C. gestroi colonies may correspond to a strategy of this termite species for rapid colonization in foreign areas, instead of a response to chemical control methods.

Foreign Investment in Latin America and the Caribbean 2003

Includes bibliography

Foreign Investment in Latin America and the Caribbean 2004

Includes bibliography

Foreign Investment in Latin America and the Caribbean 2005

Includes bibliography

Foreign Investment in Latin America and the Caribbean 2006

Includes bibliography

Foreign Investment in Latin America and the Caribbean 1999

Includes bibliography

Foreign Investment in Latin America and the Caribbean 2000

Includes bibliography

Foreign Investment in Latin America and the Caribbean 1998

Includes bibliography

Ant diversity in a sugarcane culture without the use of straw burning in southeast, são paulo, Brazil

Problem statement: One of the current requirements of agroecosystem management is the maintenance of biodiversity. Manual sugarcane harvesting with the previous burning of straw has been gradually replaced by mechanical harvesting in Brazil. However, the diversity of Formicidae, which can be a natural pest controller, has not been studied in this new system yet. Approach: This study was carried out to assess the diversity of ants in an exclusively mechanically harvested sugarcane culture based on the hypothesis that species richness and abundance will increase with the deposition of straw in this culture system. Ants were sampled using pitfall traps in six sugarcane cultivars during three consecutive harvest cycles. Results: A total of 8,139 ants, distributed in 39 species, were collected. Richness, abundance and diversity differed between harvest cycles, especially in the first cycle, when the soil did not have any straw and in the two last cycles and the straw layer was about 10-15 cm thick. The communities found in the second and third cycles were similar and the maintenance of straw in the culture contributed to a greater species diversity, particularly of generalist predaceous taxa, which may contribute to the natural control of pests. Conclusion: The diversity of ants increased with straw deposition, including of taxa that may be beneficial to the sugarcane culture. However, new studies of the predatory and competition relations in this agroecosystem are necessary. © 2010 Science Publications.

Brazil's emergence at the regional export leader in services: a case specialization in business services

Includes Bibliography

Macroeconomic volatility and social vulnerability in Brazil: the Cardoso government (1995-2002) and perspectives

Includes bibliography

Euro and the financial relations between Latin America and Europe: medium- and long-term implications

Includes bibliography

Expenditures, investment and financing for sustainable development in Brazil

Includes bibliography

Structural reforms, macroeconomic fluctuations and income distribution in Brazil

Includes bibliography

The influence of capital origin on Brazilian foreign trade patterns

Includes bibliography