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Allometric growth of two species of Ephemeroptera from Neotropical mountains streams

Published online by Cambridge University Press:  03 May 2012

Gabriel de Paula Paciencia ,
Pitágoras da Conceição Bispo  and
Sara Sanches Cortezzi
Gabriel de Paula Paciencia*
Affiliation:
Laboratório de Biologia Aquática, Departamento de Ciências Biológicas, Faculdade de Ciências e Letras de Assis, Universidade Estadual Paulista, Av. Dom Antônio, 2100, Parque Universitário, CEP 19806-900 Assis, SP, Brazil PPG em Entomologia, Departamento de Biologia, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Av. dos Bandeirantes, 3900, Monte Alegre, CEP 14040-901 Ribeirão Preto, SP, Brazil
Pitágoras da Conceição Bispo*
Affiliation:
Laboratório de Biologia Aquática, Departamento de Ciências Biológicas, Faculdade de Ciências e Letras de Assis, Universidade Estadual Paulista, Av. Dom Antônio, 2100, Parque Universitário, CEP 19806-900 Assis, SP, Brazil
Sara Sanches Cortezzi
Affiliation:
Laboratório de Biologia Aquática, Departamento de Ciências Biológicas, Faculdade de Ciências e Letras de Assis, Universidade Estadual Paulista, Av. Dom Antônio, 2100, Parque Universitário, CEP 19806-900 Assis, SP, Brazil
*
*Corresponding author: [email protected]
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Abstract

The present study evaluated the relative growth and allometry of Massartella brieni Lestage and Thraulodes sp. (Leptophlebiidae: Ephemeroptera). The morphometric analysis was based on 23 measurements and was conducted using a multivariate approach. Throughout postembryonic ontogeny, all of the head measurements, including those of the mouthparts, exhibited negative allometric growth. The mesothorax and wing pad exhibited positive allometric growth. The hind legs lengths in M. brieni and the fore and hind legs lengths in Thraulodes sp. exhibited positive allometry. The abdominal length in these two species exhibited positive allometric growth. Positive allometry was also observed along the abdomen width for M. brieni, and isometry was observed for Thraulodes sp. The relative strengthening of the thorax (in preparation for the winged stage) and the relative increase in the abdomen (which may be related to the development of the reproductive structures) during growth indicate that many of the structures that exhibit positive allometric growth are related to the transition from the aquatic to the adult stage of development.

Keywords

Lotic environmentsallometryaquatic insectsmorphometricsmultivariate allometry
Type
Research Article
Information
Annales de Limnologie - International Journal of Limnology , Volume 48 , Issue 2 , 2012 , pp. 145 - 150
Copyright
© EDP Sciences, 2012

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