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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/22437
Title: 
Caste Differences in Polybia emaciata, a Mud-Nesting Eusocial Wasp (Hymenoptera: Vespidae), that Bear on Pre-Imaginal Determination but not Size Differences
Author(s): 
Institution: 
  • Universidade Estadual Paulista (UNESP)
  • Universidade de São Paulo (USP)
ISSN: 
0361-6525
Sponsorship: 
  • Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
  • Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
  • Instituto Brasileiro do Meio Ambiente e dos Recursos Naturais Renováveis (IBAMA)
Sponsorship Process Number: 
  • FAPESP: 05/03569-8
  • FAPESP: 07/08633-1
  • CNPq: 300312/2004-0
  • CNPq: 479790/2004-3
  • IBAMA: 187/2005-CGFAU/LIC
Abstract: 
The Epiponini is a group of social wasps living in polygynic societies. The caste dimorphism varies from incipient to well distinct. Morphometric analyses on twelve body parts and ovarian development of Polybia emaciata Lucas 1879, were used to estimate the level of caste differentiation in seven colonies. Physiologic differences were found. Among queens the ovaries were inseminated and presented as highly developed; in intermediate females, ovaries were slightly developed and uninseminated, and for the workers the ovaries were not developed or inseminated. In addition, the coloration of the mesosoma and metasoma were darker in workers and intermediates. Morphometric analysis evidenced slight morphological differences. Even though body proportions were not enough to discriminate castes, the fifth sternite of the gaster had important characters that were able to differentiate queens from workers and intermediates. We propose that P. emaciata presents a case of pre-imaginal caste determination, which is not strictly based on size.
Issue Date: 
1-Jan-2009
Citation: 
Sociobiology. Chico: California State Univ, v. 53, n. 1, p. 189-204, 2009.
Time Duration: 
189-204
Publisher: 
California State University
Keywords: 
  • Caste
  • Polybia
  • Pre-imaginal determination
  • eusocial wasp
URI: 
Access Rights: 
Acesso restrito
Type: 
outro
Source:
http://repositorio.unesp.br/handle/11449/22437
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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