Patterns of Shell Utilization in Two Sympatric Species of Hermit Crabs From the Natal Coast (Decapoda, Anomura, Diogenidae)

Reddy, T. S.; Biseswar, Ramlall

doi:10.1163/156854093x00324

Cited by 29 publications

(7 citation statements)

References 17 publications

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“…Other processes less stochastic in nature than opportunity may also be important at multiple spatial scales for variability in resource use. Previously described species differences in specific hermit crab biology, which may also be relevant to the species in the current study, include resistance to predation (Bertness 1982) or environmental extremes (Gherardi 1990) and shore level inhabited (Reddy & Bisewar 1993). In addition, hermit crabs species have different preferences for shell geometry, volume, aperture width, strength, mass, condition or other features of particular shells (Reese 1962, 1969, Conover 1978, Borjesson & Szelistowski 1989, Pechenik & Lewis 2000.…”

Section: Variability Of Resource Use With Species' Biologymentioning

confidence: 85%

Local, regional and global patterns of resource use in ecology: hermit crabs and gastropod shells as an example

Barnes¹

2003

Mar. Ecol. Prog. Ser.

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To see the 'big pictures', it seems increasingly clear that experimental design, data collection and analyses of ecological investigation need to be at multiple scales. This causes problems with data complexity, sampling (level) and independence. Many ecological programmes are currently conducting multi-scale investigation of organismal trends (e.g. diversity). In this study, by contrast, the assemblages analysed were the resources used by animals (rather than animals per se). Variability in shell use was studied in 5 members of a taxon (hermit crabs) from global to site spatial levels. The novel adaptation of an existing technique used 1-factor, 3-level ANOVA of Bray-Curtis similarity values based on 'centroids' for each scale. Similarity in the number of shells used, the proportional usage of shell types, shell diversity and other variables were examined at site (>10 m apart), locality (>1 km apart) and region levels (>1000 km apart). There was significant variability amongst scales and between regions in shell use of all species. For some species, observed variability differed with location, while in others the trend was similar in all 3 regions. Between 18 and 3 shell types were used by different study species with diversity (Shannon H ') values ranging from 2.54 to 0.1 and evenness values from 0.99 to 0.1. Shell use by hermit crabs was less similar (to each other) between regions than between the study hermit crab species. No significant spatial effects at any level were found on the proportion of damaged shells used by different species. The numbers of shell types used by hermit crabs had both a taxon-specific component and a global pattern. Data from the literature in combination with that from the present study showed Dardanus, Diogenes and Pagurus species used fewer shell types than Coenobita, Clibanarius and Calcinus species. No inter-oceanic patterns were evident in any genus. Shell numbers used by Clibanarius and Calcinus species both, however, exhibited distinct latitudinal clines. Adaptation of a novel technique has, thus, demonstrated global (and differential between scale) trends in resource use by a guild of animals, although interpretation of the mechanism or meaning underlying this is not straightforward.

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Section: Variability Of Resource Use With Species' Biologymentioning

confidence: 85%

Local, regional and global patterns of resource use in ecology: hermit crabs and gastropod shells as an example

Barnes¹

2003

Mar. Ecol. Prog. Ser.

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“…REDDY & BISESWAR (1993) observed in Clibanarius virescens (Krauss, 1843) and Calcinus laevimanus (Randall, 1839) and ELWOOD et al (1995) in Pagurus bernhardus (Linnaeus, 1758) that the number of eggs produced was larger among ovigerous females occupying lighter shells. In the present study we detected no significant difference in the mean weight of the shell species occupied.…”

Section: Discussionmentioning

confidence: 98%

Population and reproductive features of the western Atlantic hermit crab Pagurus criniticornis (Anomura, Paguridae) from Anchieta Island, southeastern Brazil

Mantelatto

Faria

Iossi

et al. 2007

Iheringia, Sér. Zool.

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ABSTRACT. The population of the hermit crab Pagurus criniticornis (Dana, 1852) was studied based on seasonal abundance, size frequency distribution, sex ratio, reproductive period, fecundity and shell relationship. Specimens were collected monthly by SCUBA diving in the infralittoral area of Anchieta Island, Ubatuba. A total of 1,017 individuals was analyzed. Animal size (minimum and maximum shield length, respectively) was 0.7 and 2.9 mm for males, 0.6 and 2.8 mm for non-ovigerous females, and 1.0 and 2.5 mm for ovigerous females. The sex ratio was 1:1.29. Sexual dimorphism was recorded by the presence of males in the largest size classes. Ovigerous females were captured during all months along the year, with percentages varying from 8% (July) to 84.3% (February) in relation to the total females collected. Mean ± SD fecundity was 168 ± 125 eggs and tended to increase with increasing hermit size. Shells of four gastropod species [Cerithium atratum (Born, 1778), Morula nodulosa (Adams, 1845), Anachis lyrata (Sowerby, 1832) and Modulus modulus (Linnaeus, 1758)] were occupied by ovigerous females of P. criniticornis but fecundity was not significantly different in relation to the different shell types. The profile showed continuous and intense reproduction of P. criniticornis probably related to strategies developed to compensate for interspecific competition in the studied insular area. KEYWORDS.Crustacea, hermit crab, populational biology, fecundity. RESUMO. Caracterização populacional e reprodutiva do ermitão do Atlântico OcidentalPagurus criniticornis (Anomura, Paguridae) da Ilha Anchieta, sudeste do Brasil. A população do ermitão Pagurus criniticornis (Dana, 1872) foi avaliada com base na abundância sazonal, distribuição da freqüência de tamanho, razão sexual, período reprodutivo, fecundidade e relação com a concha ocupada. Os espécimes foram coletados mensalmente por meio de mergulho autônomo no infralitoral da Ilha Anchieta, Ubatuba. Um total de 1.017 indivíduos foi analisado. O tamanho dos animais (comprimento mínimo e máximo do escudo cefalotorácico, respectivamente) foi de 0,7 e 2,9 mm para os machos, 0,6 e 2,8 mm para as fêmeas não ovígeras e 1,0 e 2,5 mm para as fêmeas ovígeras. A razão sexual foi de 1:1,29. Foi observado dimorfismo sexual em função da presença de machos nas maiores classes de tamanho. Fêmeas ovígeras foram capturadas em todos os meses do ano, com a porcentagem variando de 8% (Julho) a 84,3% (Fevereiro) em relação ao total de fêmeas coletadas. A fecundidade média foi de 168 ± 125 ovos e tendeu a ser maior com o aumento do tamanho do ermitão. Fêmeas ovígeras de P. criniticornis foram encontradas ocupando quatro espécies de conchas de gastrópodes [Cerithium atratum (Born, 1778), Morula nodulosa (Adams, 1845), Anachis lyrata (Sowerby, 1832) e Modulus modulus (Linnaeus, 1758)] no entanto, a fecundidade não foi significativamente diferente em relação aos diferentes tipos de conchas. A população de P. criniticornis apresentou um perfil reprodutivo contínuo e intenso, possivelmente relacionad...

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“…Mechanisms underlying the pattern of shell selection and occupation by hermit crabs have been found to be determined by such factors as competition (Bertness, 1980), shell type (Reese, 1962), shell size (Vance, 1972a, b), shell internal volume (Conover, 1978;Siu and Lee, 1992), and shell availability (Reese, 1962;Bertness, 1980;Emmerson and Alexander, 1986;Reddy and Biseswar, 1993). The last factor is greatly influenced by the relative abundance of different live gastropods and their mortality rates (Ohmori et al, 1995).…”

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confidence: 99%

Shell Utilization Pattern of the Hermit Crab Calcinus Tibicen (Diogenidae) from Southern Brazil

Mantelatto¹,

Garcia²

2000

Journal of Crustacean Biology

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Patterns of Shell Utilization in Two Sympatric Species of Hermit Crabs From the Natal Coast (Decapoda, Anomura, Diogenidae)

Cited by 29 publications

References 17 publications

Local, regional and global patterns of resource use in ecology: hermit crabs and gastropod shells as an example

Local, regional and global patterns of resource use in ecology: hermit crabs and gastropod shells as an example

Population and reproductive features of the western Atlantic hermit crab Pagurus criniticornis (Anomura, Paguridae) from Anchieta Island, southeastern Brazil

Shell Utilization Pattern of the Hermit Crab Calcinus Tibicen (Diogenidae) from Southern Brazil

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