1 Department of Parasitology, University of Kelaniya, Ragama, Sri Lanka, 2 Department of Microbiology, National Institute of Preventive and Social Medicine (NIPSOM), Dhaka, Bangladesh, 3 Asociacion Civil Selva Amazónica, Iquitos, Perú, 4 Postgraduate Institute of Medicine, University of Colombo, Colombo, Sri Lanka, 5 University of Ghana, Accra, Ghana, 6 National Institute for Medical Research, ...

Seven species of Scolytodes (tribe Ctenophorini) are described as new to science: S. concavus and S. circumsetosus (from Ficus branches, La Selva), S. montanus (Monteverde), S. nudifrons (Las Cruces near San Vito), and S. triangulus (fogging sample, La Selva), all from Costa Rica, and S. ungulatus (Cerro Punta) and S. punctifrons (from Astronium graveolens, Canal Zone), both from Panama. New di...

In this work, we are going to deal with a very special type of complex systems: Deontical Impure Systems (Nescolarde-Selva et al, 2012; Nescolarde-Selva and Usó-Doménech, 2012; Nescolarde-Selva and UsóDoménech, 2013; Usó-Doménech and NescolardeSelva, 2012; Usó-Doménech and Nescolarde-Selva, 2013). They are Systems because there are objects and relations among them. They are Impure because these...

Comparisons ?1 of the effects of leaf litter chemistry on leaf breakdown rates in tropical vs temperate streams are hindered by incompatibility among studies and across sites of analytical methods used to measure leaf chemistry. ?2 We used standardized analytical techniques to measure chemistry and breakdown rate of leaves from common riparian tree species at 2 sites, 1 tropical and 1 temperate...

Analyses relating long-term records of tree growth to interannual climatic variation at La Selva, Costa Rica have revealed marked forest sensitivities to both temperature and dry-season intensity (Clark et al. 2010). The tropical-forest biome is certain to become warmer, and many areas may become drier. Testing the generality of the La Selva findings with similar analyses of field data from div...

Basic research on the insect immune response has progressed dramatically within the last two decades, showing that immunity is one of the most effective defenses against foreign invaders. As such, it is important to understand the causes of variation in this response. Here, we investigate the effects of pesticides used in Costa Rican banana plantations on the immune response of the lepidopteran...

Little is known of the ecology and behavioral biology of Eciton burchelli army ants at La Selva biological station, Costa Rica. A statary colony of E. burchelli was followed for seven days in July (wet season). Colony movements were recorded and entered into the La Selva GIS system. Angle of daily raids, velocity of foraging front and distance foraged were recorded. Estimates were made of numbe...

he textbook view of the monetary transmission mechanism rests on the central bank’s ability to manipulate the overnight interest rate by controlling the reserve supply, followed by a rational-expectations mechanism that ensures that movements in the overnight rate reverberate into longer maturity rates. However, while few dispute the fact that the central bank controls the overnight rate effect...

Guatemala was among the world’s leaders in deforestation during the 1990s at a rate of 2% per annum. Much of Guatemala’s recent forest loss has occurred in the emerging agricultural frontiers of the Maya Biosphere Reserve (MBR), the heart of the largest contiguous tropical forest in Central America—La Selva Maya. This paper presents data from 241 heads of households and 219 partners of househol...

Parasitoid insects face considerable trade-offs in locating suitable hosts within complex environments. Apocephalus paraponerae (Diptera: Phoridae) locates its host ant Paraponera clavata (Formicidae: Ponerinae) using olfactory cues. Here, comparing two populations of A. paraponerae, I describe differences in host location cues between two sites, Barro Colorado Island (BCI) in Panama and La Sel...