Duration of the pre-settlement period of the mangrove crab Ucides cordatus (Decapoda: Ocypodidae) under laboratory conditions

Ventura, Raissa Wihby; Silva, Ubiratã de Assis Teixeira da; Perbiche‐Neves, Gilmar; Ostrensky, Antônio; Boeger, Walter A.; Pie, Márcio R.

doi:10.1590/s1516-89132008000500012

Cited by 6 publications

(3 citation statements)

References 24 publications

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“…Adults of Ucides are most likely responsible for the construction of larger tunnels (Warner 1969, Branco 1991, Ventura et al 2008. Some paths seem to be only enlarged gaps between oyster clumps and secondary roots.…”

Section: Communal Burrows Structurementioning

confidence: 99%

Interrelationships among ecological factors of brachyuran crabs, trees and soil in mangrove community assemblage in Northeast Brazil

Ferreira

Alencar

2019

Community Ecology

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Mangroves are dynamic ecosystems due to influence of abiotic and biotic factors, but the latter are far less studied. Interactions between key invertebrate groups, trees, and soil properties, among others, determine the community structure throughout mangrove stand developing. Covariation among these factors, however, obscures their mutual relationships in shaping mangrove community assemblage patterns. In the estuary of Pacoti River (Ceará State, northeast Brazil), we compared the diversity and distribution of brachyurans and trees among several mid-littoral areas, and their relation with sediment features, to understand their relationships in community assemblage of new mangrove stands in developing. To discriminate the relation among these variables, ordination of data (PCA) and multivariate multiple correlation (PLS) were used. Data show that intertidal establishment of Brachyura was determined primarily by sediment properties, but further spatial distribution and diversity of this key faunal group, and the tree species that establishes, can influence each other. The prop roots habitat of Rhizophora mangle supports a higher brachyuran richness, since it allows the existence of multispecific crab burrow systems underground. Our results show that Rhizophora and brachyurans are key engineer organisms involved in shaping the physical and, hence, the ecological structure of newly established mangrove stands at Neotropics.

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Section: Communal Burrows Structurementioning

confidence: 99%

Interrelationships among ecological factors of brachyuran crabs, trees and soil in mangrove community assemblage in Northeast Brazil

Ferreira

Alencar

2019

Community Ecology

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“…The resulting techniques produced more than 1 million young forms in the megalopae phase per reproductive season (Silva et al, 2009). During this period, several issues related to this technology were investigated, such as settlement behavior (Ventura et al, 2008) and predation of megalopae by fishes (Costa et al, 2009) and by other crab species after release into the environment (Ventura et al, 2010).…”

Section: Comparação Morfométrica Entre Megalopas Do Caranguejo Do Manmentioning

confidence: 99%

Morphometric comparison between hatchery-reared and wild-caught megalopae of the mangrove crab

Ayres

Silva

Souza

et al. 2013

Pesq. agropec. bras.

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-The objective of this work was to compare the morphometry of hatchery-reared and wild-caught mangrove crab (Ucides cordatus) megalopae. Ten U. cordatus megalopae of each group (hatchery-reared and wild-caught) were individually analyzed using a stereoscopic microscope equipped with an ocular micrometer. Length, width, and height of all megalopae were measured, and the size of body appendices was determined. The results indicate that the hatchery-reared megalopae are more robust than the wild ones. Furthermore, some significant differences in the size of certain appendices can be cues of the kind of alterations that hatchery-reared individuals experience.Index terms: Ucides cordatus, body appendices, larviculture, rearing-environment, restocking programs. Comparação morfométrica entre megalopas do caranguejo do mangue produzidas em laboratório e capturadas na naturezaResumo -O objetivo deste trabalho foi comparar a morfometria de megalopas de caranguejo do mangue (Ucides cordatus) produzidas em laboratório e capturadas na natureza. Dez megalopas de U. cordatus de cada grupo (produzidas em laboratório e capturadas na natureza) foram analisadas individualmente utilizando microscópio estereoscópico equipado com ocular micrométrica. Comprimento, largura e altura de todas as megalopas foram medidos, e o tamanho dos apêndices corporais foi determinado. Os resultados são indicativos de que as megalopas produzidas em laboratório são mais robustas que as selvagens. Além disso, algumas diferenças significativas no tamanho de certos apêndices podem ser pistas do tipo de alterações que os indivíduos produzidos em laboratório experimentam.Termos para indexação: Ucides cordatus, apêndices corporais, larvicultura, ambiente de cultivo, programas de repovoamento.

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“…As observed with regard to Callinectes sapidus and Portunus trituberculatus (SECOR et al, 2002), success in the use of immature portunid crabs reared in the laboratory for restocking purposes depends largely on their age at the moment of release into the natural environment. Recent studies have suggested that the release of juveniles of the mangrove crab U. cordatus, might also be more effective in view of their putative reduced susceptibility to predation by fish and their greater ability to compete with crabs of other species (VENTURA et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Restocking Ucides cordatus (Decapoda: Ocypodidae): interespecific associations as a limiting factor to the survival of released recruits

et al. 2010

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A B S T R A C TSimulations in the laboratory were used to investigate whether survivorship rates of Ucides cordatus youngsters produced in the laboratory are significantly affected by other crab species after their release in natural environments. Furthermore, it was investigated whether the release of first instar juveniles instead of megalopae would reduce the mortality related to interspecific predation. A preliminary estimate of the crab community structure in the target area of a restocking program was undertaken and indicated a great dominance of fiddler crabs (Uca spp). Based on this information, experiments were conducted to assess the ecological relationship between Ucides cordatus megalopae and first instar juveniles and fiddler crabs of different size classes in the presence of mangrove sediment, simulating natural conditions, as well as in the absence of any kind of refuge. It was observed that fiddler crabs not only compete with, and prey on U. cordatus youngsters, both as megalopae and juveniles. Furthermore, it was observed that the predation behavior of fiddler crabs is exercised only by individuals with carapaces wider than 0.5 cm. The results of the assay simulating natural conditions showed that, even when sediment was provided as a refuge, the same pattern was observed, with survivorship rates significantly lower in the presence of Uca crabs. R E S U M OSimulações em laboratório foram efetuadas visando investigar se após liberação na natureza a sobrevivência de recrutas de Ucides cordatus produzidos em laboratório é afetada por outras espécies de caranguejos. Adicionalmente, foi verificado se com a liberação de juvenis no estágio 1, ao invés de megalopas, haveria redução da mortalidade causada por predação interespecífica. Para tanto foi realizada estimativa prévia da estrutura da comunidade de caranguejos presente na área-alvo de um programa de repovoamento em desenvolvimento na região de Santo Amaro, Baía de Todos os Santos, Brazil, cujos resultados mostraram grande dominância de caranguejos violinista (Uca spp.). Com base nessa informação, foram realizados experimentos para verificar as relações ecológicas entre megalopas e juvenis 1 de Ucides cordatus e as diferentes classes de tamanho das outras espécies de Uca, em presença de sedimento do mangue, simulando condições naturais, e na ausência de refúgio. Observou-se que os caranguejos violinista competem predando tanto juvenis quanto megalopas de Ucides cordatus. Além disso, foi visto que esse comportamento de predação é exercido apenas por indivíduos com largura de carapaça maior que 0,5 cm. Os resultados do teste de simulação das condições do ambiente natural evidenciaram que o mesmo padrão de predação foi observado mesmo quando o sedimento foi oferecido como refúgio, sendo as taxas de sobrevivência significativamente menores na presença de espécies de Uca.

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Duration of the pre-settlement period of the mangrove crab Ucides cordatus (Decapoda: Ocypodidae) under laboratory conditions

Abstract: ABSTRACT

Cited by 6 publications

References 24 publications

Interrelationships among ecological factors of brachyuran crabs, trees and soil in mangrove community assemblage in Northeast Brazil

Interrelationships among ecological factors of brachyuran crabs, trees and soil in mangrove community assemblage in Northeast Brazil

Morphometric comparison between hatchery-reared and wild-caught megalopae of the mangrove crab

Restocking Ucides cordatus (Decapoda: Ocypodidae): interespecific associations as a limiting factor to the survival of released recruits

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