Intraspecific variation in preserved specimens of the fiddler crabs Uca panacea and Uca pugilator (Decapoda: Ocypodidae)

Coêlho, Petrônio Alves

doi:10.1590/s1984-46702009000100024

Cited by 4 publications

(1 citation statement)

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“…Fiddler crabs, being similar in carapace form, have been cited as an example of speciation without significant morphological divergence (Levinton, 2001: 140). As a result, behaviour, colour variation, and allozyme differences play prominent roles in recognition of otherwise fairly cryptic species (Knowlton, 1986; Levinton, 2001; Bezerra & Coelho, 2009). It should not be surprising, then, that the PCA suggests that interspecific carapace variation is not substantially greater than intraspecific carapace variation, particularly for species in the subgenus Minuca .…”

Section: Discussionmentioning

confidence: 99%

The geographic structure of morphological variation in eight species of fiddler crabs (Ocypodidae: genus Uca) from the eastern United States and Mexico

Hopkins

Thurman

2010

Biological Journal of the Linnean Society

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Species with larger geographic distributions are more likely to encounter a greater variety of environmental conditions and barriers to gene flow than geographically-restricted species. Thus, even closely-related species with similar life-history strategies might vary in degree and geographic structure of variation if they differ in geographic range size. In the present study, we investigated this using samples collected across the geographic ranges of eight species of fiddler crabs (Crustacea: Uca) from the Atlantic and Gulf coasts of North America. Morphological variation in the carapace was assessed using geometric morphometric analysis of 945 specimens. Although the eight Uca species exhibit different degrees of intraspecific variation, widespread species do not necessarily exhibit more intraspecific or geographic variation in carapace morphology. Instead, species with more intraspecific variation show stronger morphological divergence among populations. This morphological divergence is partly a result of allometric growth coupled with differences in maximum body size among populations. On average, 10% of total within-species variation is attributable to allometry. Possible drivers of the remaining morphological differences among populations include gene flow mediated by ocean currents and plastic responses to various environmental stimuli, with isolation-by-distance playing a less important role. The results obtained indicate that morphological divergence among populations can occur over shorter distances than expected based on dispersal potential.

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Section: Discussionmentioning

confidence: 99%

The geographic structure of morphological variation in eight species of fiddler crabs (Ocypodidae: genus Uca) from the eastern United States and Mexico

Hopkins

Thurman

2010

Biological Journal of the Linnean Society

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The nomenclatural status of the two “spiny-wristed” fiddler crabs: Uca spinicarpa Rathbun, 1900, and U. hesperiae Crane, 1975 (Crustacea: Brachyura: Ocypodidae)

Rosenberg¹

2013

Zootaxa

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A secondary homonymy is documented for Gelasimus [= Uca] tetragonon var. spinicarpa Kossmann, 1877 (a species from the Red Sea), and Uca spinicarpa Rathbun, 1900 (a species from the Gulf of Mexico). Although Kossmann's usage of the nomen spinicarpa has chronological priority, a reversal of precedence is required by Article 23.9 of the Code since Kossmann's use has not been applied as a valid name since the original publication in 1877, while Rathbun's use of the name has been applied over 50 times in the last half century. The species Kossmann was most likely referring to is today known as Uca hesperiae Crane, 1975, a name which may be retained in light of the reversal of precedence.

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Global literature of fiddler crabs, genus Uca (Decapoda, Ocypodidae): trends and future directions

Nabout

Bini

Diniz‐Filho

2010

Iheringia, Sér. Zool.

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ABSTRACT. Crabs of the genus Uca Leach, 1814 are characterized by having strong sexual dimorphism and a global distribution. Currently, 97 species have been described and analyzed under several aspects, including population ecology, physiology and ethology. However, there is no general summary of the information from the various literatures. The aim of this study is to perform a scientometric analysis of fiddler crab studies. For this we searched papers available in the Thomson ISI database that contained the words "Uca" OR "fiddler* crab*" between the years 1991 and 2007. For each paper, we researched and recorded the following characteristics: publication year; journal of publication; the first author's nationality; the country where the study was conducted; study type; species studied; and the work area. Our results indicated that there was no increase in the number of articles through the years considered. The Journal of Experimental Marine Biology and Ecology published most of the articles on Uca, indicating the importance of this group as a model for testing ecological hypotheses using experimental approaches. Our results also showed that United States had the highest number of authors and published studies on Uca, following the overall trend in dominance on scientific research. Furthermore, using models with three variables (per capita income, number of species of Uca and extent of coastal countries) we observed that, according to the Akaike Information Criterion, the per capita income was the most important correlate for the number of articles per country (both the author's country and country of study). Additionally, our results show that the species U. pugilator (distributed on the East Coast of the North American continent) was the species most singularly referenced in the papers considered. Moreover, our results indicate that most studies on Uca use a descriptive and local scale. The majority of papers in our literature search reflect studies in population biology, followed by behavioral and physiological characteristics. KEYWORDS.Scientometrics, population biology, Uca pugilator, AIC, Per capita income.RESUMO. Literatura global sobre caranguejos violinistas, gênero Uca (Decapoda, Ocypodidae): tendências e direções futuras. Caranguejos do gênero Uca Leach, 1814 são caracterizados por apresentarem forte dimorfismo sexual e são globalmente distribuídos. Atualmente são descritas 97 espécies desse gênero, sendo estudados em diversos aspectos como ecologia de populações, fisiologia e etologia. Entretanto, até o presente não existe um trabalho que sintetize as informações da literatura científica sobre esse grupo. O objetivo desse trabalho foi realizar uma análise cienciométrica sobre estudos de caranguejo Uca. Para isso, buscou-se artigos que continham os termos "Uca" OR "fiddler* crab*, entre 1991 e 2007, disponíveis na base de informações bibliográficas do Thomson ISI. Para cada artigo foram coletadas informações como ano de publicação, periódico onde o artigo foi publicado, nacionalidade do primeiro au...

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Intraspecific variation in preserved specimens of the fiddler crabs Uca panacea and Uca pugilator (Decapoda: Ocypodidae)

Cited by 4 publications

References 20 publications

The geographic structure of morphological variation in eight species of fiddler crabs (Ocypodidae: genus Uca) from the eastern United States and Mexico

The geographic structure of morphological variation in eight species of fiddler crabs (Ocypodidae: genus Uca) from the eastern United States and Mexico

The nomenclatural status of the two “spiny-wristed” fiddler crabs: Uca spinicarpa Rathbun, 1900, and U. hesperiae Crane, 1975 (Crustacea: Brachyura: Ocypodidae)

Global literature of fiddler crabs, genus Uca (Decapoda, Ocypodidae): trends and future directions

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