Coexistence of two sympatric hermit crab species from South Brazil: the effect of the shell adequacy index and circadian movement patterns

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dc.contributor.authorda Silva, Alexandre R.
dc.contributor.authorSantos, Renan A. P. [UNESP]
dc.contributor.authorRodrigues, Gabriel F. B. [UNESP]
dc.contributor.authorVieira, Neida R.
dc.contributor.authorBaroni, Bruna K.
dc.contributor.authorGregati, Rafael A.
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversidade Estadual Do Centro-Oeste (UNICENTRO)
dc.date.accessioned2023-07-29T13:50:01Z
dc.date.available2023-07-29T13:50:01Z
dc.date.issued2023-06-01
dc.description.abstractGastropod shells play an important role in the life story of hermit crabs, influencing biological characteristics directly. The adequacy of shells for hermit crabs can be evaluated through the Shell Adequacy Index, which calculates the shell's ideal size/weight compared to the actual dimensions of the occupied shells. To avoid competition for shells, animals can display a variety of strategies including alterations in their circadian rhythms. This study aimed to evaluate if two sympatric species of hermit crabs—Pagurus brevidactylus and Pagurus criniticornis—are competing for the best fitting shells and if they present differences in their circadian rhythms. Their shells were identified and measured regarding the aperture length and width. The shell adequacy was calculated using linear models of the Shell Aperture Length and Width, and the period of activity of the animals was filmed for 24 h and later analyzed. The period between 10 am and 2 pm represented daytime, while 10 pm to 2 am represented nighttime. Pagurus brevidactylus occupied mainly Cerithium atratum and Claremontiella nodulosa shells, while P. criniticornis occupied mainly C. atratum shells. Our results showed that the two species are inhabiting shells with similar traits, which may indicate competition. The species do not present distinct activity periods; however, the shell occupation pattern suggests a competition at the functional level.en
dc.description.affiliationMuseu de Zoologia da Universidade de São Paulo (MZUSP) Universidade de São Paulo (USP), São Paulo
dc.description.affiliationLaboratório de Biologia de Invertebrados Aquáticos (LABIAQUA) Departamento de Biodiversidade e Bioestatística Instituto de Biociências de Botucatu (IBB) Universidade Estadual Paulista (UNESP), São Paulo
dc.description.affiliationLaboratório de Biologia Aquática Departamento de Ciências Biológicas Universidade Estadual Do Centro-Oeste (UNICENTRO), Paraná
dc.description.affiliationUnespLaboratório de Biologia de Invertebrados Aquáticos (LABIAQUA) Departamento de Biodiversidade e Bioestatística Instituto de Biociências de Botucatu (IBB) Universidade Estadual Paulista (UNESP), São Paulo
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipPro-Reitoria de Pesquisa, Universidade de São Paulo
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdCNPq: #151038/2022-8
dc.description.sponsorshipIdFAPESP: FAPESP #2019/01287-8
dc.format.extent459-469
dc.identifierhttp://dx.doi.org/10.1007/s10452-023-10022-0
dc.identifier.citationAquatic Ecology, v. 57, n. 2, p. 459-469, 2023.
dc.identifier.doi10.1007/s10452-023-10022-0
dc.identifier.issn1573-5125
dc.identifier.issn1386-2588
dc.identifier.scopus2-s2.0-85151982835
dc.identifier.urihttp://hdl.handle.net/11449/248658
dc.language.isoeng
dc.relation.ispartofAquatic Ecology
dc.sourceScopus
dc.subjectCircadian rhythm
dc.subjectHermit crabs
dc.subjectPagurus
dc.subjectShell adequacy index
dc.titleCoexistence of two sympatric hermit crab species from South Brazil: the effect of the shell adequacy index and circadian movement patternsen
dc.typeArtigo
unesp.author.orcid0000-0001-8921-8767[1]
unesp.author.orcid0000-0002-1820-4234[2]
unesp.author.orcid0000-0002-1679-9270[3]

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Artigos - Bioestatística - IBB