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Flood-resistance of eggs and life-cycle adaptation, a survival strategy of Neomachilellus scandens (meinertellidae, Archaeognatha) in Central Amazonian inundation forests

Published online by Cambridge University Press:  19 September 2011

Joachim Adis  and
Helmut Sturm
Joachim Adis
Affiliation:
Max-Planck-Institute for Limnology, Tropical Ecology Working Group, Postfach 165, D-2320 Plön, FRG, in cooperation with Instituto Nacional de Pesquisas da Amazônia (INPA), C.P. 478, BR-69000 Manaus/AM, Brazil
Helmut Sturm
Affiliation:
Hochschule Hildesheim, Marienburger Platz 22, D-3200 Hildesheim, FRG
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Abstract

Neomachilellus scandens (Machiloidea; Wygodzinsky, 1978) is a litter inhabitant of inundation forests in the Rio Negro valley, which are annually flooded for 5–6 months. At the beginning of the non-inundation period, juveniles hatch from previously submerged eggs on the forest floor and reach maturity after 3–4 months. Adults propagate in the litter where females deposit their eggs which are subjected to the next flooding. Both sexes subsequently migrate into the trunk/canopy area and perish. In nearby primary and secondary dryland forests N. scandens has no defined reproduction period and juvenile stages are found throughout the year.

Résumé

Neomachilellus scandens (Machiloidea; Wygodzinsky, 1978), une espèce de littière, est recontrée dans les forêts inondées de la vallée du Rio Negro, que sont recouvertes par les eaux 5 à 6 mois par an. Les oeufs, enfouis dans le sol inondé, arrivent à maturité au bout de 3 à 4 mois. Les juvéniles éclosent au début de la décrue et les adultes se propagent dans la littière, dans laquelle les femelles vont déposer leurs oeufs qui seront soumis à l'inondation suivante. Après la reproduction, les deux sexes achèvent leur cycle en migrant dans la zone des troncs et des canopées. Dans les forêts de terre ferme avoisinantes, primaires ou secondaires, N. scandens ne présente pas de période de reproduction définie et les stades juvéniles sont rencontrés toute l'année.

Keywords

MeinertellidaeArchaeognathaflood-resistancequiescenceinundation forestsNeotropicsAmazoniaBrazil
Type
Symposium III: Life-History Traits in Tropical Insects
Information
International Journal of Tropical Insect Science , Volume 8 , Issue 4-5-6: Recent Advances in Research on Tropical Entomology , December 1987 , pp. 523 - 528
Copyright
Copyright © ICIPE 1987

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References

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