Reproductive Cycle and Recruitment Period of Ocypode Quadrata (Decapoda, Ocypodidae) at a Sandy Beach in Southeastern Brazil

Negreiros-Fransozo, Maria Lúcia; Fransozo, Adílson; Bertini, Giovana

doi:10.1651/0278-0372(2002)022[0157:rcarpo]2.0.co;2

Cited by 36 publications

(33 citation statements)

References 11 publications

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“…Few species are known to reproduce in cold months, like Hemigrapsus nudus (Dana, 1851), studied by KNUDSEN (1964), and Ocypode quadrata (Fabricius, 1787), studied by NEGREIROS-FRANSOZO et al (2002). Such pattern is also observed for N. granulata in the tropical mangrove population studied here.…”

Section: 5supporting

confidence: 70%

“…Such pattern is also observed for N. granulata in the tropical mangrove population studied here. NEGREIROS-FRANSOZO et al (2002) evaluated some aspects of a population of O. quadrata from tropical beaches in north of the state of São Paulo, Brazil, and recorded a continuous reproductive period, but with greater reproductive intensity in the winter. For those authors, environmental factors such as cold ocean currents in the summer directly influence larval release.…”

Section: 5mentioning

confidence: 99%

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Population biology of the burrowing crab Neohelice granulata, (Crustacea: Decapoda: Varunidae) from a tropical mangrove in Brazil

Gregati¹,

Negreiros-Fransozo²

2009

Zoologia (Curitiba, Impr.)

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ABSTRACT. The population biology of the burrowing crab Neohelice granulata (Dana, 1851) from a mangrove in Jabaquara Beach, Paraty, state of Rio de Janeiro, Brazil (23º13'04"S and 44º42'47"W), was studied with respect to the following traits: size-frequency distribution, recruitment, reproductive period, fecundity, and sex ratio. Specimens were sampled monthly from April, 2003 to March, 2004, at the river margins during low tide periods. Size, sex, presence of eggs, and stage of the female gonad were recorded. Ovigerous females had their eggs removed and counted. The reproductive period was continuous and the highest frequency of ovigerous females was recorded in the fall and winter. Mature gonads were found throughout the year and recruitment was continuous but more intense during the summer. The fecundity of N. granulata (30028.3 ± 10861.2 eggs) was high in comparison to studies in other localities. In general, the proportion of males was similar to that of females (1:0.92); however, males were predominant in the fall (1:0.77) and winter (1:0.75). All the information available so far on the reproduction of N. granulata involves populations from subtropical salt marshes; therefore, comparative studies including other habitats, such as mangrove forests, are needed to further understand the environmental influences on the population and reproductive biology of semiterrestrial crabs.

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Section: 5supporting

confidence: 70%

Section: 5mentioning

confidence: 99%

Population biology of the burrowing crab Neohelice granulata, (Crustacea: Decapoda: Varunidae) from a tropical mangrove in Brazil

Gregati¹,

Negreiros-Fransozo²

2009

Zoologia (Curitiba, Impr.)

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“…Afterwards, the gonad developmental stages in females were analyzed removing the carapace of the specimens on the dorsal region. The shape, size and coloration were analyzed and classified in 6 stages of development (macroscopic maturity criterion): immature, rudimentary, developing, developed, advanced and spent, following a modification of the procedures proposed by HAEFNER (1976), CHOY (1988), ABELLÓ (1989) and NEGREIROS-FRANSOZO et al (2002).…”

Section: Fiddlermentioning

confidence: 99%

Gonad development in females of fiddler crab Uca rapax (Crustacea, Brachyura, Ocypodidae) using macro and microscopic techniques

Castiglioni

Negreiros-Fransozo²,

Greco

et al. 2007

Iheringia, Sér. Zool.

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ABSTRACT. The morphology of the ovaries in Uca rapax (Smith, 1870) was described based on macroscopic and microscopic analysis. Females were collected in Itamambuca mangrove, Ubatuba, state of São Paulo, Brazil. In the laboratory, 18 females had their ovaries removed and prepared for histology. Each gonad developmental stage was previously determined based on external and macroscopic morphology and afterwards each stage was microscopically described. The ovaries of U. rapax showed a pronounced macroscopic differentiation in size and coloration with the maturation of the gonad, with six ovarian developmental stages: immature, rudimentary, developing, developed, advanced and spent. During the vitellogenesis, the amount of oocytes in secondary stage increases in the ovary, resulting in a change in coloration of the gonad. Oogonias, primary oocytes, secondary oocytes and follicular cells were histologically described and measured. In female's ovaries of U. rapax the modifications observed in the oocytes during the process of gonad maturation are similar to descriptions of gonads of other females of brachyuran crustaceans. The similarities are specially found in the morphological changes in the reproductive cells, and also in the presence and arrange of follicle cells during the process of ovary maturation. When external morphological characteristics of the gonads were compared to histological descriptions, it was possible to observe modifications that characterize the process in different developmental stages throughout the ovarian cycle and, consequently, the macroscopic classification of gonad stages agree with the modifications of the reproductive cells. KEYWORDS.Macroscopic analysis, histological analysis, oogonias, primary and secundary oocytes, Uca rapax. RESUMO. Desenvolvimento da gônada em fêmeas do caranguejo-violinistaUca rapax (Crustacea, Brachyura, Ocypodidae) utilizando técnicas macro e microscópicas. A morfologia dos ovários de Uca rapax foi descrita baseada nas análises macroscópica e microscópica. As fêmeas foram coletadas no manguezal de Itamambuca, Ubatuba, Estado de São Paulo, Brasil. No laboratório, os ovários de 18 fêmeas foram retirados e preparados para histologia. Os estágios gonadais foram caracterizados previamente por meio de análises da morfologia externa e macroscopia e posteriormente cada estágio foi descrito microscopicamente. Os ovários das fêmeas de U. rapax apresentaram uma diferenciação macroscópica pronunciada no tamanho e coloração durante o processo de maturação, sendo caracterizados seis estágios de desenvolvimento ovariano: imaturo, rudimentar, em desenvolvimento, desenvolvido, avançado e esgotado. Microscopicamente, estes estágios diferiram quanto ao tamanho, cor e proporção de oogônias e oócitos presentes. Na análise histológica, oogônias, oócitos primários e secundários e células foliculares foram descritos e mensurados. As modificações observadas nos oócitos durante o processo de maturação dos ovários das fêmeas de U. rapax são similares às descrições de gônadas de outras ...

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“…La primera reacción de los cangrejos ante el haz de luz era quedarse estáticos, lo que facilitó su captura de forma manual. Algunas variantes de este método de muestreo fueron usadas por Negreiros-Fransozo et al (2002) y Branco et al (2010.…”

Section: Muestreo Y Abundanciaunclassified

“…Hasta el momento los estudios sobre esta especie se han enfocado en su biología reproductiva, crecimiento y morfología (Haley, 1969(Haley, , 1972Díaz & Costlow, 1972;Negreiros-Fransozo, Fransozo, & Bertini, 2002;Antunes et al, 2010), en estudios fisioló-gicos (Santos & Moreira, 1999;Vinagre, Amaral, Ribarcki, Silveira, & Périco, 2007;Tullis & Andrus, 2011) y ritmo de actividad (Valero-Pacheco, Álvarez, Abarca-Arenas, & Escobar, 2007).…”

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Efectos del disturbio humano sobre la dinámica poblacional de Ocypode quadrata (Decapoda: Ocypodidae) en playas del Caribe mexicano

Ocaña

Navarrete

Carrillo

et al. 2016

RBT

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Effects of human disturbance on the population dynamics of Ocypode quadrata (Decapoda: Ocypodidae) in beaches of the Mexican Caribbean. The ghost crab Ocypode quadrata is a relevant species in the Western Atlantic beaches, and has been proposed as an indicator of human impact in these ecosystems. Eventhough some studies have covered various aspects of its natural history, no evaluations on the effects of human disturbance on its population dynamics have been made. This work compared the abundance, growth, and mortality of O. quadrata in two disturbed beaches (Aventuras and Majahual) and two preserved beaches (Xcacel and Puerto Angel) from the Mexican Caribbean. For this, nine samplings were made on each beach (every two to three months) between March 2013 and November 2014. Crabs were collected manually by three people, during the night first hours and for one hour, and a total area of 9 000 m 2 per beach. The crabs were measured, weighed, and separated into three groups: juvenile, male and female; while abundance was estimated by the number of collected crabs, and growth parameters were estimated using length frequencies. A total of 1 047 crabs were sampled in the four beaches; a higher crab abundance was found in the preserved beaches, but significant differences were only found between Puerto Angel and Majahual (Tukey, p<0.05). The adultjuvenile ratio was 1:1 in Xcacel and Aventuras, while in Majahual, more juveniles than adults were collected; and Puerto Angel had more adults than the juveniles. The size structure at Xcacel ranged from 4-32 mm, but in the rest of the beaches the minimum size was 5 mm. The maximum size at Aventuras, Majahual and Puerto Angel were 27 mm, 25 mm and 30 mm, respectively. The modal progression analysis of length's pooled data, revealed the presence of at least two groups of ages in all beaches. For all beaches, individuals smaller than 10 mm length were collected in almost all sampling months, indicating a continuous recruitment throughout the year. The length-weight relationship of the ghost crab was found isometric in the two preserved beaches, and negative allometric at the two impacted beaches. Crabs from Puerto Angel showed the highest body condition (Tukey, p<0.05). K-values ranged from 0.6-0.97/year and L∞ from 29.0 mm to 33.6 mm with higher values for the two preserved beaches. The highest mortality values were found in Xcacel and Aventuras. In the disturbed beaches, the destruction of the dunes, the mechanical cleaning and the removal of organic matter, seem to be the main causes that lead to a low abundance of crabs, their slower growth and higher mortalities. However, in the best preserved beaches, biological interactions appear to be the most important aspects in regulating the population dynamics of this species. These results supported the information that the ghost crab is a good indicator of human disturbance, and its population changes were clearly measurable and comparable among protected and impacted beaches; these results are also relevant for the man...

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Reproductive Cycle and Recruitment Period of Ocypode Quadrata (Decapoda, Ocypodidae) at a Sandy Beach in Southeastern Brazil

Cited by 36 publications

References 11 publications

Population biology of the burrowing crab Neohelice granulata, (Crustacea: Decapoda: Varunidae) from a tropical mangrove in Brazil

Population biology of the burrowing crab Neohelice granulata, (Crustacea: Decapoda: Varunidae) from a tropical mangrove in Brazil

Gonad development in females of fiddler crab Uca rapax (Crustacea, Brachyura, Ocypodidae) using macro and microscopic techniques

Efectos del disturbio humano sobre la dinámica poblacional de Ocypode quadrata (Decapoda: Ocypodidae) en playas del Caribe mexicano

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