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Distribution and importance of spiders inhabiting a Brazilian sugar cane plantation

Abstract

The spider fauna (Araneae) of a sugar eane plantation was surveyed monthly by hand colteetion and beating vegetation in sugar cane fields across Botucatu, State of São Paulo, Brazil. Composition and rchness (family and species where identifieation to species was possible) microhabitat preferenees were reeorded, and diversity and evenness indices were calculated. A total of 1291 spiders belonging to 73 species and 20 families were collected. The most diverse families were Theridiidae, Salticidae, and Araneidae, and the most abundant ones were Theridiidae, Saltieidae, Anyphaenidae, and Araneidae, Seven species represented 58.6% of the total fauna, with Crysso pulcherrima (Mello-Leitão,1917) (Theridiidae) composing 28.2%. About 65% of the spiders occupied the upper part of the plants (above 20 cm). Five spider species were present in the sugar cane throughout crop development. Evidence of spiders feeding on sugar cane pest species was observed.

Araneae; Sugar cane plantation; spider fauna; spider diversity; natural enemies


Distribution and importance of spiders inhabiting a Brazilian sugar cane plantation

Isabela Maria Piovesan RinaldiI; Beatriz do Prado MendesI,II; Alan Bruce CadyIII

IDepartamento de Zoologia, Instituto de Biociências, Universidade Estadual Paulista "Julio de Mesquita Filho". Rubião Júnior, Caixa Postal 51 0,18618-000 Botucatu, São Paulo, Brasil. E-mail: rinaldi@ibb.unesp.br

IIBolsista da FAPESP

IIIDepartment of Zoology, Miami University, Oxford, Ohio 45056, USA

ABSTRACT

The spider fauna (Araneae) of a sugar eane plantation was surveyed monthly by hand colteetion and beating vegetation in sugar cane fields across Botucatu, State of São Paulo, Brazil. Composition and rchness (family and species where identifieation to species was possible) microhabitat preferenees were reeorded, and diversity and evenness indices were calculated. A total of 1291 spiders belonging to 73 species and 20 families were collected. The most diverse families were Theridiidae, Salticidae, and Araneidae, and the most abundant ones were Theridiidae, Saltieidae, Anyphaenidae, and Araneidae, Seven species represented 58.6% of the total fauna, with Crysso pulcherrima (Mello-Leitão,1917) (Theridiidae) composing 28.2%. About 65% of the spiders occupied the upper part of the plants (above 20 cm). Five spider species were present in the sugar cane throughout crop development. Evidence of spiders feeding on sugar cane pest species was observed.

Keywords: Araneae, Sugar cane plantation, spider fauna, spider diversity, natural enemies

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ACKNOWLEDGEMENTS. To São Manoel Ltda Mill for allowing access to the study site, To M. Ramirez, A.D. Brescovit for the identification of the Clubionoidea, and G. Horrniga, M.A.L. Marques and G.B. Edwards for the identification of the Linyphiidae, Theridiidae and Salticidae respectively. This research was supported by grant (FAPESP) to B.P. Mendes.

Received in 07.XII.2001; accepted in 01.VII.2002.

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Publication Dates

  • Publication in this collection
    03 June 2009
  • Date of issue
    July 2002

History

  • Received
    07 Dec 2001
  • Accepted
    01 July 2002
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