Population Structure and Reproductive Period of the Tropical Hermit Crab Calcinus tibicen (Decapoda: Diogenidae) in the Region of Ubatuba, São Paulo, Brazil

Fransozo, Adílson; Mantelatto, Fernando Luís Medina

doi:10.2307/1549150

Cited by 74 publications

(59 citation statements)

References 15 publications

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“…The sexual dimorphism in relation to size observed in the present study is a common aspect of hermit-crab biology, as suggested by several previous reports (Fransozo & Mantelatto, 1998;Manjón-Cabeza & García-Razo, 1998;Turra & Leite, 2000;Mantelatto & Martinelli, 2001;Branco et al, 2002;Bertini et al, 2004;Macpherson & Raventos, 2004;Litulo, 2005a, c;Litulo & Tudge, 2005;Mantelatto et al, 2005). According to Abrams (1988), three factors may influence sexual dimorphism in hermit crabs: (1) the difference of energy available for growth, with less somatic growth in females due to greater expenditure of energy in egg production; (2) the larger reproductive effort exhibited by males, which are able to copulate with more than one female; and (3) the larger dimensions of males, to optimize fertilization of the females and win intraspecific fights.…”

Section: Discussionsupporting

confidence: 89%

Population biology and reproduction of the hermit crab Clibanarius vittatus (Decapoda: Anomura) in an estuarine region of southern Brazil

2009

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The population dynamics and reproduction of the hermit crab Clibanarius vittatus were evaluated on Pescadores Beach, located on the estuarine channel of São Vicente (São Paulo), Brazil. The hermit crabs were captured by hand during low tide, from May 2001 to April 2003. A total of 2554 hermit crabs were captured, of which 701 were males, 1741 non-ovigerous females, 48 ovigerous females and 64 intersex individuals. The size-frequency distribution of the males was represented by a platykurtic bell-shaped curve, which differed from the leptokurtic bell-shaped curve of the females. The smaller and intermediate classes were composed mainly of females (modal size 6.5 -7.5 mm carapace shield length (CSL)), and the larger classes only by males (modal size 9.5 -10.5 mm CSL). The overall sex-ratio was skewed toward females (0.39:1/M:F), differing significantly from the expected 1:1. A seasonal reproductive pattern was recorded for C. vittatus in this location, with more intensive reproductive activity in the warmer months. The absence of juveniles suggests that their recruitment area is different than the area inhabited by adults, possibly another area with more protection and specialized or different resources for young.

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Section: Discussionsupporting

confidence: 89%

Population biology and reproduction of the hermit crab Clibanarius vittatus (Decapoda: Anomura) in an estuarine region of southern Brazil

2009

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“…Probably, the deviation of proportion males/females found in the present study (females more abundant in the middle-size classes) may be attributed to a faster growth of males, to sexual selection and to smaller longevity of females (BERTNESS, 1981;ABRAMS, 1988;BENVENUTO & GHERARDI, 2001). This pattern has been the most common one reported in the literature (WENNER, 1972;MANJÓN-CABEZA & GARCÍA RASO, 1995;GHERARDI & NARDONE, 1997;FRANSOZO & MANTELATTO, 1998;GARCIA & MANTELATTO, 2001) for hermit crab populations inhabiting both the intertidal and infralittoral areas. Unfortunately, we are not able to compare the present results with those of NEGREIROS-FRANSOZO et al (1991) which were obtained from one punctual collection.…”

Section: Discussionsupporting

confidence: 53%

“…Hermit crabs represent an important portion of many intertidal and moderately deep tropical benthic communities (FRANSOZO & MANTELATTO, 1998). Consequently, this group of decapods provides promising material for study because the establishment of these animals in such environments derives from the evolution of adaptive population strategies.…”

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confidence: 99%

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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“…Such diVerences are potentially important, both in determining the nature of population regulation within a species, and in determining the nature of interactions between species (Abrams 1988). Sexual dimorphism has been extensively reported for many hermit crabs; almost all studies have focused on the propodus chelipeds and/or these appendages in relation to resource use (Fotheringham 1976;Bertness 1980;Abrams 1988;Manjón-Cabeza and García Raso 1996;Gherardi and Nardone 1997;Fransozo and Mantelatto 1998;Mantelatto and Sousa 2000;Garcia and Mantelatto 2001;Branco et al 2002;Martinelli et al 2002;Litulo 2005;Mantelatto et al 2005). Recently, we demonstrated that the pleopods may be an important aspect to be considered in such studies .…”

Section: Introductionmentioning

confidence: 99%

Use of pleopod morphology to determine sexual dimorphism and maturity in hermit crabs: Isocheles sawayai as a model

2009

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In the Anomura, studies on growth patterns are infrequent, possibly because the heterogeneity of the group, especially in terms of morphology, makes it diYcult to construct generalized growth models. Particularly hermit crabs are an interesting group to evaluate aspects of growth, because of their unique body. Isocheles sawayai, a hermit crab found only in the western Atlantic Ocean, poorly known with respect to its sexual dimorphism and maturity, was investigated here based on morphometry. Monthly collections (July 2001 through June 2003) were made from a shrimp Wshing boat in the Caraguatatuba region on the northern coast of the state of São Paulo, Brazil. The specimens were measured and weighed, and had their sex checked. Throughout the sampling period, 374 specimens of I. sawayai were collected (11.23% nonovigerous females, 6.69% ovigerous females, 79.41% males and 2.67% intersexes). The size at which morphological sexual maturity was reached by both sexes ranged from 4.0 to 4.3 mm shield length, according to the relative growth and the size of the smallest ovigerous female. Sexual dimorphism was shown by males, which were signiWcantly larger than females, and by diVerences in growth pattern between the sexes, especially for relationships that involved the pleopods, which is related to their diVerent functions in males and females. The present study is one of the Wrst to use pleopod morphometry to determine sexual maturity and dimorphism in hermit crabs, especially for species with intersexuality such as I. sawayai.

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Population Structure and Reproductive Period of the Tropical Hermit Crab Calcinus tibicen (Decapoda: Diogenidae) in the Region of Ubatuba, São Paulo, Brazil

Cited by 74 publications

References 15 publications

Population biology and reproduction of the hermit crab Clibanarius vittatus (Decapoda: Anomura) in an estuarine region of southern Brazil

Population biology and reproduction of the hermit crab Clibanarius vittatus (Decapoda: Anomura) in an estuarine region of southern Brazil

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

Use of pleopod morphology to determine sexual dimorphism and maturity in hermit crabs: Isocheles sawayai as a model

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