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What determines the number of juvenile instars in the tropical grasshopper Cornops aquaticum (Leptysminae : Acrididae : Orthoptera)?

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons56570

Adis,  Joachim
Working Group Tropical Ecology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons56754

Junk,  Wolfgang J.
Working Group Tropical Ecology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society;

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Zitation

Adis, J., Lhano, M., Hill, M., Junk, W. J., Marques, M. I., & Oberholzer, H. (2004). What determines the number of juvenile instars in the tropical grasshopper Cornops aquaticum (Leptysminae: Acrididae: Orthoptera)? Studies on Neotropical Fauna and Environment, 39(2), 127-132. doi:10.1080/01650520412331271729.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000F-DAAB-0
Zusammenfassung
Cornops aquaticum (Brunei) is host specific on Eichhornia spp. and Pontederia spp. (Pontederiacae). Its present distribution ranges from Mexico to Argentina. The number of juvenile instars (5-7) apparently mirrors the photoperiod and temperature pulses of different climatical conditions in the respective geographical regions. Based on life-history data, three working hypotheses are proposed for forthcoming studies. These will test whether the varying number of juvenile instars represents a phenotypic plasticity of a single genotype or an adaptation that is genetically fixed, due to an evolutionary relationship of the host with its host-plant