The Behavioral Ecology of Hermit Crabs

Hazlett, Brian A.

doi:10.1146/annurev.es.12.110181.000245

Cited by 374 publications

(294 citation statements)

References 78 publications

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“…Gastropod shell availability acts as a limiting factor to these animals' populations (PROVENZANO, 1960;VANCE, 1972a;KELLOGG, 1976;SPIGHT, 1977;BARNES, 1999) and influences their growth rates (MARKHAM, 1968;CHILDRESS, 1972;VANCE, 1972;FOTHERINGHAM, 1976a;BERTNESS, 1981;HAZLETT, 1981) and egg production (BOLLAY, 1964;BERTNESS, 1981;ELWOOD et al, 1995;MANTELATTO et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

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Comparative analysis of shell occupation by two southern populations of the hermit crab Loxopagurus loxochelis (Decapoda, Diogenidae)

2012

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A B S T R A C TThe present study aimed to comparatively verify the relation between the hermit crabs and the shells they use in two populations of Loxopagurus loxochelis. Samples were collected monthly from July 2002 to June 2003, at Caraguatatuba and Ubatuba Bay, São Paulo, Brazil. The animals sampled had their sex identified, were weighed and measured; their shells were identified, measured and weighed, and their internal volume determined. To relate the hermit crab's characteristics and the shells' variables, principal component analysis (PCA) and a regression tree were used. According to the PCA analysis, the three gastropod shells most frequently used by L. loxochelis varied in size. The regression tree successfully explained the relationship between the hermit crab's characteristics and the internal volume of the inhabited shell. It can be inferred that the relationship between the morphometry of an individual hermit crab and its shell is not straightforward and it is impossible to explain only on the basis of direct correlations between the body's and the shell's attributes. Several factors (such as the morphometry and the availability of the shell, environmental conditions and inter-and intraspecific competition) interact and seem to be taken into consideration by the hermit crabs when they choose a shell, resulting in the diversified pattern of shell occupancy shown here and elsewhere. R E S U M OO presente estudo teve como objetivo verificar de forma comparativa a relação entre ermitões e conchas utilizadas por duas populações de Loxopagurus loxochelis. Foram realizadas coletas mensais, de julho 2002 a junho 2003, nas Enseadas de Caraguatatuba e de Ubatuba, São Paulo, Brasil. Os animais amostrados foram identificados quanto ao sexo, pesados, e mensurados; as conchas de gastrópodes foram identificadas, mensuradas, pesadas e tiveram seu volume interno determinado. Para relacionar as variáveis dos ermitões com as conchas foram utilizadas a análise de componentes principais (PCA) e a árvore de regressão. As três conchas de gastrópodes utilizadas mais intensamente diferiram em tamanho de acordo com a PCA. A árvore de regressão explicou com sucesso a relação entre características do ermitão e volume interno das conchas habitadas. Inferiu-se que a relação entre a morfometria de um ermitão e sua concha não é simples e não é possível de ser explicada com base somente em correlações diretas entre atributos do corpo e da concha. Inúmeros fatores (como morfometria e disponibilidade da concha, condições ambientais e competição inter e intra-específica) interagem e devem ser levados em consideração na escolha de uma concha pelos ermitões, resultando no diversificado padrão de ocupação de conchas demonstrado neste e em outros trabalhos correlatos.

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Section: Introductionmentioning

confidence: 99%

“…There is often a large overlap in the way the shells are used by coexistent species (HAZLETT, 1981). The change to a new shell may occur when the hermit crab finds an empty one or obtains it from another individual, through a ritualized behavior (HAZLETT, 1981;SATO;SENO, 2006).…”

Section: Introductionmentioning

confidence: 99%

Comparative analysis of shell occupation by two southern populations of the hermit crab Loxopagurus loxochelis (Decapoda, Diogenidae)

2012

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“…Shell occupation affords egg protection, but the volume of eggs that can be protected is limited by shell volume. Shell volume is correlated with female size but a female hermit crab that obtains a lalper shell may be able to carry a larger volume of well-protected eggs (Fotheringham, 1976;Hazlett. 1981: Lancaster.…”

Section: Discussionmentioning

confidence: 99%

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Botelho¹,

Costa²

2000

Hydrobiologia

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Section: Introductionmentioning

confidence: 99%

“…13,14 They are scavengers, consuming both dead animals and algae, and have relatively restricted mobility. 15 For these reasons, hermit crabs may be a more accurate sentinel organism than the predatory marine mollusks, the highly mobile fish and other crustaceans that are generally used as environmental indicators of this kind of pollution.In consequence of the low environmental concentrations of BTs, analytical approaches need to be refined in order to develop methods with high recovery and accuracy. Most studies analyzing BTs used gas chromatography with flame photometric detection (GC-FPD) 10,16 and gas chromatography coupled to tandem mass spectrometry (GC-MS/MS).…”

mentioning

confidence: 99%

Tributyltin in crustacean tissues: analytical performance and validation of method

Cristale

Santos

Sant’Anna

et al. 2012

J. Braz. Chem. Soc.

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O ermitão Clibanarius vittatus é um organismo típico de regiões intertidais estuarinas sendo considerado um possível bioindicador da presença de tributilestanho (TBT) nesses ambientes. Por esta razão, este estudo apresenta o desempenho analítico e a validação do método para quantificação de TBT em tecidos de C. vittatus por cromatografia gasosa com detector fotométrico de chama pulsante (GC-PFPD), após extração com solvente apolar (tolueno) e derivatização com reagente de Grignard. Os limites de detecção do método (LOD) foram 2,0 e 2,8 ng g -1 para TBT e DBT (dibutil estanho), respectivamente, e seus limites de quantificação (LOQ) 6,6 e 8,9 ng g -1 para TBT e DBT, respectivamente. O método foi aplicado em amostras do Estuário de Santos, Estado de São Paulo, Brasil. As concentrações de TBT e DBT variaram de 26,7-175,0 ng g -1 a 46,2-156,0 ng g -1 , respectivamente. As concentrações encontradas saopreocupantes uma vez que efeitos tóxicos (tais como a alteração endócrina) têm sido relatados em outros organismos, mesmo em níveis inferiores aos registrados no presente estudo.The hermit crab Clibanarius vittatus is a typical organism from intertidal regions being considered as a good bioindicator of tributyltin presence at these environments. Thus this study presents the analytical performance and validation method for TBT quantification in tissues of C. vittatus by gas chromatography with pulsed flame photometric detector (GC-PFPD) after extraction with an apolar solvent (toluene) and Grignard derivatization. The limits of detection of the method (LOD) were 2.0 and 2.8 ng g -1 for TBT and DBT (dibutyltin), respectively, and its limits of quantification (LOQ) were 6.6 and 8.9 ng g -1 for TBT and DBT, respectively. The method was applied to samples from Santos Estuary, São Paulo State, Brazil. TBT and DBT concentrations ranged from 26.7 to 175.0 ng g -1 and from 46.2 to 156.0 ng g -1 , respectively. These concentrations are worrisome since toxic effects (such as endocrine disruption) have been reported for other organisms even under lower levels of registred at this study.Keywords: crustaceans, organotin, tributyltin (TBT), gas chromatography IntroductionButyltin compounds (BTs), members of the class of organometallic contaminants, are found in coastal regions worldwide because they were used in antifouling paints for many years. [1][2][3] In spite of the total worldwide ban proposed by the International Maritime Organization (IMO) in January 2008, these compounds are still found in different environmental compartments of aquatic systems. 4 Their toxic effects are observed in many species because tributyltin (TBT) can induce an endocrine disruption process known as imposex. 5 This effect in mollusks has been well documented. [6][7][8] Other effects caused by TBT include shell malformation in the Pacific oyster Crassostrea gigas, suppressed Tributyltin in Crustacean Tissues: Analytical Performance and Validation of Method J. Braz. Chem. Soc. 40 growth in the centric diatoms Skeletonema costatum and Thalassiosira pse...

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The Behavioral Ecology of Hermit Crabs

Cited by 374 publications

References 78 publications

Comparative analysis of shell occupation by two southern populations of the hermit crab Loxopagurus loxochelis (Decapoda, Diogenidae)

Comparative analysis of shell occupation by two southern populations of the hermit crab Loxopagurus loxochelis (Decapoda, Diogenidae)

Untitled

Tributyltin in crustacean tissues: analytical performance and validation of method

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