COPA

Digital Repository for Área de Conservación Guanacaste, a World Heritage Place.

Ciencia e Investigación

Ciencia e Investigación

 

Esta comunidad integra las publicaciones hechas en revistas científicas, libros, tesis y estudios académicos, que se han realizado en ACG

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Recent Submissions

  • Silva Dias, Fernando Maia; Janzen, Daniel H.; Hallwachs, Winnie; Chacón, Isidro; Willmott, Keith; Ortiz Acevedo, Elena; Hendrik Mielke, Olaf Hermann; Casagrande, Mirna Martins (2018-05-02)
    The leafwing butterflies of the genus Zaretis Hübner, [1819] are revised based on morphological and molecular data. Species were delimited using morphology and 396 ‘DNA barcode’ sequences. Intraspecific and interspecific ...
  • Janzen, Daniel H. (1986)
    Five large branches of a Cassia grandis tree were deflowered in its flowering year; the consequence was that 10-20 percent of the floweringfruiting capacity of the tree's crown was offset by one year from the tree's ...
  • Janzen, Daniel H. (1978-01)
    In mid· July 1977, there was a strong emergence of cicadas, Oiceroprocta apache, in the vicinity of Tacna, Yuma County, southwestern Arizona. In this desert habitat the adult cicadas were feeding on the sap of many ...
  • S. S., Rehr; P. P., Feeny; Janzen, Daniel H. (1973-06)
    On the basis of their association with ants, neotropical species of the genus Acacia may be grouped into two broad categories. 'Ant-acacias', comprising less than 10% of the species in Central America depend in varying ...
  • Janzen, Daniel H. (1990)
  • Rosenthal, Gerald A.; Janzen, Daniel H. (1984-08-22)
  • Janzen, Daniel H. (1977)
    Department of Ecology and Evolutionary Biology, Division of Biology, University of Michigan, Ann Arbor 48104. Present address: Department of Biology, University of Pennsylvania, Philadelphia, PA 19174. This study was ...
  • Janzen, Daniel H. (1977-06)
    inflammability limits (4-75% in air), and is difficult (sometimes dangerous) to store as a liquid. Its principal benefits are that it would allow the storage of energy in a post-fossil-fuel era, when electricity is ...
  • Janzen, Daniel H. (1977-04)
    Beginning in about 1965, the IBP psychologically and financially supported variously coordinated studies of the basic biology of five major widespread arthropod pests: fruit flies (Tephritidae), Myzus persicae, rice ...
  • Janzen, Daniel H. (1976)
    Department of Ecology and Evolutionary Biology, Division of Biology, University of Michigan, Ann Arbor 48104. Present address: Department of Biology, University of Pennsylvania, Philadelphia, PA 19174. This study was ...
  • Janzen, Daniel H. (1990)
  • Woodwell, G. M.; Janzen, Daniel H.; Wilcox, Howard A.; North, Wheeler J.; Swartz, James; Hoyer, Horst (1988-12-16)
    I would like to correct the misimpression given by Barry J. Cipra's Research News article (21 Oct., p. 374) that the accomplishment of Lenstra, Manasse, and others in factoring a 100-digit number somehow threatens the ...
  • Janzen, Daniel H. (1991)
    The greatest challenge facing the tropical biodiversity community is to stop intellectualizing and start doing. We now know how to conserve tropical biodiversity, and there are viable and growing conservation projects ...
  • Janzen, Daniel H.; Beattle, Andrew J. (1985)
  • Editorial 
    Janzen, Daniel H. (1987-08)
    The professional conservation community is fighting a brave battle in the tropics, but it is losing. And it will continue to lose, and thus everyone will lose, unless there is a dramatic change in the number of participants ...
  • Janzen, Daniel H. (1987-06-05)
    Where the soil is fertile and the climate good, almost all tropical forest has been lost. However, fertile soil and good climate are not intrinsic traits. Those descriptors mean that a plant or animal of use to humans ...
  • Janzen, Daniel H. (1987-03-12)
    MICHAEL Crawley set out to put together a plant ecology text for the undergraduate, a text that would haul itself out of the musty bog of old world descriptive and aggregate plant ecology and into the chaos of new ...
  • Janzen, Daniel H. (1981-11-21)
    An interpretive ecledic review of the widesprelld lind diffuse liter.llture on the om; nipresent phenomenon of lInimals preying on seeds, this paper focuses on the dif· ferences between pre- lind post-ciisperllll seed ...
  • Janzen, Daniel H.; M. Pond, Caroline (1976-03)
    Our pet African grey parrot (origin: Cameroon), living in a free-flight wood and screen indoor cage (3 x 2 x 1 m), uses 1.5-4cm long splinters of wood to scratch the skin on the posterior part of its head.
  • Janzen, Daniel H.; Miller, G. A.; Hackforth-Jones, J.; Pond, C. M.; Hooper, K.; Janos, D. P. (1976)
    Bat-generated seed shadows of two mature Andira inermis (W. Wright) DC. trees in the deciduous forest lowlands of Guanacaste Province, Costa Rica, are highly heterogeneous; very unequal numbers of seeds are deposited ...

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