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• W2011908356 abstract "MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 265:155-163 (2003) - doi:10.3354/meps265155 The molding hypothesis: linking shell use with hermit crab growth, morphology, and shell-species selection Alexander Turra1,2,*, Fosca P. P. Leite1 1Departamento de Zoologia, Pós-Graduação em Ecologia, Instituto de Biologia, Unicamp, Campinas, São Paulo 13083-970, Brazil 2Present address: Laboratório de Biologia Aquática, Curso de Ciências Biológicas, Fundação de Ensino Octávio Bastos, Campus II, São João da Boa Vista, São Paulo 13870-159, Brazil *Email: turra@feob.br ABSTRACT: The Œmolding hypothesis¹ (Elwood et al. 1979. Anim Behav 27:940-946) predicts that shell-species selection by hermit crabs may be influenced by past experience in shell use through shell-imposed alterations in crab morphology. The present study was designed to test this hypothesis and to further the understanding of plasticity in the shell-species selection in hermit crabs. Shell use was demonstrated to influence crab growth and morphology. Individuals reared in shells of Tegula viridula attained larger sizes than individuals in shells of Morula nodulosa. Crab growth was also dependent on crab sex, since males reached larger sizes and presented longer intermolt periods than females. The most conspicuous influence of shell utilization on crab morphology was in dorso-ventral flattening, which occurred on a decreasing scale with the shell species, as follows: M. nodulosa > Cerithium atratum > T. viridula. Crabs from all treatments and those collected in nature in shells of Olivella minuta chose mainly shells of C atratum, but the previous experience of crabs strongly influenced their shell-species selection pattern. Individuals maintained in M. nodulosa shells selected M. nodulosa shells more frequently than individuals reared in T. viridula or C. atratum. The influence of past experience was demonstrated to depend on shell type, since patterns of shell-species selection of individuals reared in T. viridula or C. atratum were identical. These differences in the shell-species selection pattern directly reflected the differences in crab dorso-ventral flattening, i.e. dorso-ventrally compressed individuals (those in shells of M. nodulosa or O. minuta) showed a higher probability of selecting narrow-aperture shells than did Œrounded¹ individuals (those in shells of T. viridula or C. atratum). The weight of the selected shells at the end of the experiment depended on crab size instead of previous experience with different shell architectures. KEY WORDS: Phenotypic plasticity · Shell-species selection · Resource selection · Growth · Molding hypothesis · Pagurus Full text in pdf format PreviousNextExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 265. Online publication date: December 31, 2003 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2003 Inter-Research." @default.
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• W2011908356 title "The molding hypothesis: linking shell use with hermit crab growth, morphology, and shell-species selection" @default.
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