Morphometric Relationships Between the Hermit Crab Isocheles sawayai (Forest &amp; Saint Laurent) (Crustacea Anomura Diogenidae) and its Shell from Southern Brazil

Masunari, Setuko; Fontanelli, A.M.; Sampaio, Sara Regina

doi:10.2174/1874450800802010013

Cited by 4 publications

(7 citation statements)

References 21 publications

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“…The shells of Stramonita haemastoma were occupied at a high percentage by all demographic groups (males, females and ovigerous females), similar to the pattern found by Masunari et al (2008) (males 57.14% and females 62.33%) and suggesting that no competition between the sexes exists for the higher availability of this resource in the environment (Abrams, 1988). In contrast, Mantelatto and Dominciano (2002) described a different shell occupation pattern by Paguristes tortugae Schmitt, 1933, with low coefficient of determination: Pisania auritula (Link, 1807) (R2 = 0.46), Cerithium atratum (Born, 1778) (R2 = 0.51), and Morula nodulosa (Adams, 1845) (R2 = 0.45).…”

Section: Isocheles Sawayaisupporting

confidence: 78%

“…The richness of empty shells (10 species of gastropods) occupied by I. sawayai in the study area (26ºS) was greater than that described by Pinheiro et al (1993), in Ubatuba, São Paulo (23ºS) (six species), but was lower than that identified at the same latitude by Fantucci et al (2008) (17 species) in a neighboring area (Caraguatatuba), and was similar to that found by Masunari et al (2008) (eight species) on the Paraná coast (25ºS), thereby demonstrating the absence of a latitudinal pattern in determining shell occupation. The competence in using resources is probably directly linked to the regional abiotic and biotic conditions and the plasticity of species of hermit crab to occupy gastropod shells of different species (Galindo et al, 2008).…”

Section: Isocheles Sawayaisupporting

confidence: 73%

“…The availability of this gastropod in the study area is probably similarly high, as also observed on the coast of Paraná (southern Brazil) (Masunari et al, 2008). Shells of O. urceus possessed a smaller aperture than the other gastropod shells.…”

Section: Isocheles Sawayaisupporting

confidence: 71%

“…Another feature of this shell is its statistically higher weight and thicker wall than similar-sized shells of other species (Ayres-Peres et al, 2012), which might provide better protection against predators that break shells, and be more robust against adverse environmental conditions, such as wave action (Reese, 1962;Bertness, 1981b). The weight of this shell might also contribute to the improved stability of hermit crabs on an unconsolidated substrate, thus preventing the animal being dragged along by the tide or water current (Masunari et al, 2008).…”

Section: Isocheles Sawayaimentioning

confidence: 99%

See 3 more Smart Citations

Habitat heterogeneity in the assemblages and shell use by the most abundant hermit crabs (Anomura: Diogenidae and Paguridae): does the occupied shell species differ according to gender and species?

2016

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Section: Isocheles Sawayaisupporting

confidence: 78%

Section: Isocheles Sawayaisupporting

confidence: 73%

Section: Isocheles Sawayaisupporting

confidence: 71%

Section: Isocheles Sawayaimentioning

confidence: 99%

See 2 more Smart Citations

Habitat heterogeneity in the assemblages and shell use by the most abundant hermit crabs (Anomura: Diogenidae and Paguridae): does the occupied shell species differ according to gender and species?

2016

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“…The relation between shell weight and hermit crabs' preferences is well discussed in the literature, the main issues being the hydrodynamics (velocity flow and wave presence) and hermit crabs' locomotor ability. Hermit crabs tend to choose heavier shells in regions of fast flow and in surf zones in order to serve T A B L E 5 Abundance and occupied gastropod shells proportion (results of multinomial proportions test - Goodman, 1964) as an 'anchor' to the substrate (Argüelles et al, 2009;Frameschi et al, 2014;Hahn, 1998;Masunari et al, 2008). Hahn (1998) showed that the crab Calcinus seurati Forest, 1951, both in reviews of collected material and in laboratory experiments, occupied heavier shells in conditions of high water flow, while specimens captured and analysed in standing water systems, without flow, picked lighter shells.…”

Section: Discussionmentioning

confidence: 99%

Shell use by sympatric hermit crab species in a seasonally open coastal lagoon in Northeastern Brazil

et al. 2017

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There are gaps in what is known about the patterns of gastropod shell use by hermit crabs in Brazilian lagoon areas, especially in Northeastern Brazil. However, this is important because the understanding of selection patterns provides information on life history and eco‐evolutionary conceptions of paguroids. The present study investigated the use of gastropod shells occupied by Pagurus criniticornis and Clibanarius sclopetarius in a coastal lagoon seasonally connected to an estuary and to the sea, correlating eco‐evolutionary aspects and hydrodynamic characters. The study was carried out between February 2013 and January 2014. Hermit crabs and their shells were identified and measured (hermit crabs’ cephalothorax shield length and width, major propodus length and height, weight, shell total length and width, shell aperture length and width). Partial least squares regression was used to analyse the morphometric data. Additionally, a multinomial proportions test was performed to infer patterns (inter‐/intra‐specific) of shells’ occupation. Hermit crab species occupied a total of 13 types of shells, predominantly those of Neritina virginea (67.83%). The shell weight was the most important determinant of shell occupancy in the morphometric model (variable importance in projection >1). The proportions of N. virginea shells used were similar in both species of hermit crabs, except between the sexes of P. criniticornis. Presumably, the high utilization rate of N. virginea shells is related to its abundance and dispersal, and to the shells’ suitability for hermit crabs, which is reflected by the morphometric model, as well as by the hydrodynamics of the lagoon‐estuarine environment. The relative occupation of different types of shells for each species of hermit crabs studied appears to be associated with regulation by inter‐/intra‐specific competition, which fosters the co‐occurrence of those populations. These results endorse coastal lagoons as a refuge and recruitment area for aquatic fauna. In addition, it highlights a challenge in the management and conservation of paguroid species whose population dynamics depend on the resources coming from the Gastropoda community.

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Reproductive biology of the South American endemic hermit crabIsocheles sawayai(Crustacea, Anomura) from the Southern coast of Brazil

Stanski

Castilho

2016

Invertebrate Reproduction & Development

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The goal of this study was to investigate the sex ratio, structure and reproductive biology of Isocheles sawayai, a hermit crab captured as bycatch in a non-selective shrimp fishery. The animals were collected from July 2010 to June 2011. Out of the 575 individuals found, the majority were concentrated near the coast with a predominance of silt and clay in the sediment and warmer water. The mean length of males was 7.5 mm, which was larger than that of females (5.5 mm). The sex ratios were male-biased, except in November. The reproductive period was seasonal, with a peak during the spring, mainly in November, when 95% of the total ovigerous females were recorded. Our results suggest different habitat preferences exist according to sex; males prefer coastal regions and females prefer intertidal zones. However, the data demonstrated that both sexes utilised the same coastal regions in the reproductive period, mainly in November. A higher intensity of rainfall was observed in the spring (October, November and December), and early summer, which probably promotes the transport of coastal organic materials, and creates an excellent environment for the reproduction and subsequent larval development of benthic animals such as I. sawayai.

show abstract

Morphometric Relationships Between the Hermit Crab Isocheles sawayai (Forest & Saint Laurent) (Crustacea Anomura Diogenidae) and its Shell from Southern Brazil

Cited by 4 publications

References 21 publications

Habitat heterogeneity in the assemblages and shell use by the most abundant hermit crabs (Anomura: Diogenidae and Paguridae): does the occupied shell species differ according to gender and species?

Habitat heterogeneity in the assemblages and shell use by the most abundant hermit crabs (Anomura: Diogenidae and Paguridae): does the occupied shell species differ according to gender and species?

Shell use by sympatric hermit crab species in a seasonally open coastal lagoon in Northeastern Brazil

Reproductive biology of the South American endemic hermit crabIsocheles sawayai(Crustacea, Anomura) from the Southern coast of Brazil

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