Olfactory selectivity in intertidal hermit crabs: aggregation behavior by Pagurus criniticornis (Decapoda, Anomura) in response to simulated predation on the gastropod Cerithium atratum

Autor(es)

de Souza, Estevao C. F. ^[1] ; Gorman, Daniel ^[2] ; Leite, Fosca P. P. ^[3] ; Turra, Alexander ^[2]

Afiliação do(s) autor(es)

^[1] Inst Chico Mendes Conservacao Biodiversidade, Reserva Biol Atol Rocas, Natal, RN - Brazil

^[2] Univ Sao Paulo, Inst Oceanog, Praca Oceanog, BR-19105508 Sao Paulo - Brazil

^[3] Univ Estadual Campinas, Dept Biol Anim, Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Hydrobiologia; v. 772, n. 1, p. 31-43, JUN 2016.
• Citações Web of Science: 1

Resumo

Hermit crabs respond to sensory cues that guide them toward limiting resources in marine and terrestrial environments. We examined the response of the common intertidal hermit crab Pagurus criniticornis (Dana, 1852) to simulated predation events on: (1) their principal shell donor Cerithium atratum (Born, 1778), (2) conspecifics, and (3) a sympatric bivalve; to test for the prevalence of olfactory specificity (i.e., attraction to a preferred gastropod species) or olfactory generality (i.e., attraction to a range of cues). Results showed that crabs were strongly attracted to gastropod baits but not to conspecifics or bivalves possibly reflecting greater motivation to acquire newly liberated resources than those more widely available (e.g., existing shells or food). We then examined the potential drivers of aggregative behavior by comparing the morphology and shell quality of attending individuals to an unbiased population. Although attending crabs were of a similar size and weight to the general population, their shells were of lower quality (adequacy, damage, and encrustation), suggesting that motivation to procure new shells is modulated by existing shell quality. The findings provide a clearer understanding of how hermit crabs acquire new resources and might have implications for the release and redistribution of other limiting resources within coastal environments. (AU)

• Processo FAPESP: 13/07576-5 - Ecologia populacional de invertebrados bentônicos na Baía do Araçá, litoral norte do Estado de São Paulo
• Beneficiário: Daniel Gorman
• Linha de fomento: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 99/11233-7 - Atração de Pagurus criniticornis (Dana, 1852)(Decapoda, Anomura) por eventos de predação simulada
• Beneficiário: Estevão Carino Fernandes de Souza
• Linha de fomento: Bolsas no Brasil - Mestrado