Population dynamic of larval stages of Tauriphila risi Martin and Erythemis attala Selys (Anisoptera: Libellulidae) in Punta Lara Gallery Forest (Buenos Aires, Argentina)

RODRIGUES CAPÍTULO A

ODONATOLOGICA

SOC INT ODONATOLOGICA

Lugar: Roterdam; Año: 2000 vol. 29 p. 333 - 340

0375-0183

Laral populations of the 2 species were studied in a lentic freshwater environment. 13 larval instars were recognized from plots of head width and length of wig-pads.Density, populations dynamics, age, structure, flying period and winter quiescence were analysed. Both uni- and semivoltine individuals were found. Microhabitat differences were found beteen the 2 spp, T. risi preferring Pistia stratiotes and Hydrocotyle ranunculoides, whereas E. attala preferred lemnaceas.  A life table was constructed  for T. risi, which showed mortality rate maxima at hatching and at 10 and 23 months.