Sexual Shape Dimorphism of the Mangrove Crab<i>Ucides cordatus</i>(Linnaeus, 1763) (Decapoda, Ucididae) Accessed through Geometric Morphometric

Alencar, Carlos Eduardo Rocha Duarte; Lima-Filho, Paulo Augusto de; Molina, Wagner Franco; Freire, Fúlvio Aurélio de Morais

doi:10.1155/2014/206168

Cited by 33 publications

(27 citation statements)

References 39 publications

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“…According to Sanz (1987) [34], the difference in growth rates of male and female P. elegans is related to gonadal development. Sexual dimorphism is also commonly observed in other Pleocyemata (e.g., [35,36,37,38]). In this case, females allocate most of their energy to somatic growth, resulting in a larger body size, which allows them to carry larger gonads and to incubate more embryos during the reproductive period [39].…”

Section: Discussionmentioning

confidence: 85%

Reproductive biology of the shrimp Palaemon northropi (Rankin, 1898) (Caridea: Palaemonidae) from an estuary in the Brazilian northeastern

et al. 2019

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The objective of this study was to evaluate aspects of the reproductive biology of Palaemon northropi, a shrimp of the northeastern Brazilian estuarine region. The specimens were sampled between July and November 2017, with a hand net, and were identified to species level and sexed. We measured the carapace length (CL) of males and females and the second pleura length (PL) of females. A total of 85 individuals were collected, including 36 males and 49 females (24 non-ovigerous and 25 ovigerous). The sex ratio was 0.42, with a non-significant departure from the 1:1 ratio. Mean sizes (±SD) of males and females were 3.41±0.54 and 4.98±1.33 mm CL, respectively. The mean size of the PL (±SD) of females was 2.67±1.03 mm CL. Mean fecundity was 255±57.84 embryos. The CL was positively associated with fecundity, but the fecundity did not vary between embryo developmental stages. Palaemon northropi shows sexual dimorphism, with females being larger than males. The results indicate that the embryonic development of P. northropi occurs normally, even in an estuarine region, such as that of present study, since there was no significant loss of embryos during development. This study contributes to knowledge of the reproductive biology of P. northropi and help in our understanding of the ecological relevance of these shrimps in estuarine environments.

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Section: Discussionmentioning

confidence: 85%

Reproductive biology of the shrimp Palaemon northropi (Rankin, 1898) (Caridea: Palaemonidae) from an estuary in the Brazilian northeastern

et al. 2019

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“…Esta variação está relacionada às distintas funções e adaptações reprodutivas dos sexos e pode ser uma consequência das diferentes estratégias sexuais do grupo, uma vez que a energia para o crescimento é usada de forma distinta em machos e fêmeas. Os comportamentos de forrageamento, reprodutivos e agonísticos são considerados as principais pressões seletivas que direcionam respostas evolutivas para ambos os sexos em Brachyura (Lee, 1995;Alencar et al, 2014). O dimorfismo sexual pode ser uma consequência direta de hormônios específicos a cada sexo, que proporcionam uma morfologia distinta relacionada ao sucesso reprodutivo da espécie.…”

Section: Discussionunclassified

“…A forma mais ampla da região posterior da carapaça nas fêmeas está relacionada ao aumento do potencial reprodutivo da espécie, ampliando a área para acomodação e proteção, bem como facilitando a fixação da massa de ovos no abdômen, corroborando o padrão para espécie (Hartnoll, 1974;Lima et al, 2014). Em trabalhos sobre dimorfismo sexual utilizando morfometria geométrica, o mesmo padrão de variação morfológica para fêmeas foi observado para Liocarcinus depurator (Linnaeus, 1758) (Rufino et al, 2004a(Rufino et al, ,b, 2006 e Ucides cordatus (Linnaeus, 1763) (Alencar et al, 2014).…”

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“…Técnicas de morfometria geométrica são utilizadas para verifi car diferenças signifi cativas na forma e no tamanho de determinadas estruturas corpóreas, para responder questões relacionadas às variações intra e interespecífi cas, questões evolutivas e ecológicas de maneira geral (Klingenberg, 2010;Mitrovski-Bogdanović et al, 2014;Bower & Piller, 2015), como a alometria ontogenética e o dimorfi smo sexual (Trevisan et al, 2012;Ponssa & Candioti, 2012;Accioly et al, 2013 diferenças morfológicas mínimas em estruturas corporais, e tem sido utilizada em Decapoda principalmente devido ao rígido exoesqueleto e à facilidade na obtenção de marcos anatômicos (Rohlf & Marcus, 1993;Alencar et al, 2014). Com a compreensão da variação morfológica de caracteres homólogos é possível discutir o direcionamento da seleção sexual com base na morfologia de cada sexo bem como inferir sobre as pressões ecológicas (Tatsuta et al, 2004).…”

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Dimorfismo sexual em Hepatus pudibundus (Crustacea, Decapoda, Brachyura)

Marochi

Trevisan

Gomes

et al. 2016

Iheringia, Sér. Zool.

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ABSTRACT. Sexual dimorphism in Hepatus pudibundus (Crustacea, Decapoda: Brachyura). A study on sexual dimorphism in Hepatus pudibundus (Herbst, 1785) was performed using geometric morphometrics. The carapace of 28 males and 30 females and the left and right cheliped propodus of 22 males and 26 females were analyzed. Thirteen landmarks were established in the carapace and 10 in the cheliped propodus. A Generalized Procrustes Analysis based on landmark confi gurations was used to separate the components of size and shape. A Student t-test was used to determine the statistically signifi cant sexual dimorphism of the carapace and the cheliped propodus. The variation in the shape of the structures was evaluated with a discriminant analysis. There was sexual dimorphism in the analyzed structures. Males were smaller than females. The carapace of females was larger in the posterior region than in males, indicating an expansion of the area for accommodation of the egg mass. The fi xed fi nger of the cheliped propodus of females is more posteriorly arched that can be used to facilitate the cleaning of eggs laid in the abdominal chamber. Our results provide new information about the development of sexual secondary characters and their eff ects on the shape of the carapace and the cheliped propodus in males and females of H. pudibundus.KEYWORDS. Aethridae, carapace, propodus, geometric morphometrics, morphological variation.RESUMO. Um estudo sobre o dimorfi smo sexual no caranguejo Hepatus pudibundus (Herbst, 1785) foi realizado utilizando morfometria geométrica. A carapaça de 28 machos e 30 fêmeas e o própodo dos quelípodos direito e esquerdo de 22 machos e 26 fêmeas foram analisados. Foram estabelecidos 13 marcos anatômicos bidimensionais na carapaça e 10 no própodo para ambos os sexos. Uma Análise Generalizada de Procrustes baseada na confi guração dos marcos anatômicos foi utilizada para separar os componentes de tamanho e de forma. Um Teste-t de Student foi utilizada para determinar a signifi cância estatística do dimorfi smo sexual da carapaça e do própodo dos quelípodos. A variação na forma das estruturas foi avaliada através de uma Análise de Função Discriminante. Houve dimorfi smo sexual na forma e no tamanho das estruturas analisadas. Machos mostraram dimensões menores do que fêmeas. A carapaça das fêmeas foi mais larga na região posterior do que em machos, indicando uma ampliação da área para acomodação da massa de ovos. O dedo fi xo do própodo dos quelípodos das fêmeas está mais voltado para a parte posterior e pode facilitar a limpeza dos ovos fi xados na câmara abdominal. Nossos resultados trazem novas informações sobre o desenvolvimento de caracteres sexuais secundários e as suas consequências sobre a forma da carapaça e o própodo dos quelípodos em machos e fêmeas de H. pudibundus.PALAVRAS-CHAVE. Aethridae, carapaça, própodo do quelípodo, morfometria geométrica, variação morfológica.A dimorfismo sexual pode ser definido como diferenças morfológicas entre os sexos que estão relacionados principalmente à seleçã...

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“…En su conjunto, estos estudios han mostrado que las langostas pueden exhibir dimorfismo sexual, alometría, diferencias inter-poblacionales y plasticidad fenotípica. Hallazgos similares se han encontrado en estudios morfométricos de otros crustáceos tales como Aegla marginata (Trevisan et al, 2012), Austropotamobius pallipes (Bertocchi, Brusconi, Gherardi, Buccianti, & Scalici, 2008), Carcinus maenas (Ledesma, Van der Molen, & Barón , 2010;Silva, Alves, Paula, & Hawkins, 2010;Souza , Ilarri, Campos, Marques, & Martins, 2011), Cyrtograpsus affinis (Lezcano, Gonzá-lez, Spivak, & Dellatorre, 2012), Cyrtograpsus angulatus (Idaszkin, Márquez, & Nocera, 2013), Liocarcinus depurator (Rufino, Abelló, & Yule, 2004;Guerao & Abelló, 2011), Munida gregaria (Pérez-Barros, Calcagno, & Lovrich, 2011), Munida rugosa (Claverie & Smith, 2010) y Ucides cordatus (Alencar, Lima-Filho, Molina, & Freire. 2014), entre otros.…”

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Variación fenotípica de la langosta espinosa Panulirus argus (Decapoda: Paniluridae) en el Caribe Suroccidental

Bolaños-Cubillos

Campos

Márquez

2016

RBT

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Phenotypic variation of Panulirus argus (Decapoda: Paniluridae) in Southwest Caribbean. The spiny lobster Panulirus argus is an important fishery species in the Western Central Atlantic. Changes in the dispersion range through its life cycle and heterogeneous habitats, suggest that P. argus exhibit phenotypic plasticity. However, the morphometric variation of this species is unknown so far, although this information is relevant in evolutionary studies as well as to solve questions of fishery interest. Thus, the aim of this study was to determine whether P. argus exhibit phenotypic variation between sexes, among five geographic origins and three oceanographic conditions of Southwest Caribbean (Colombian archipelago San Andrés, Providencia y Santa Catalina). A total of 193 P. argus adults were submitted to geometric morphometrics using six landmarks that delimit one half of the sternal plate. The differences in sternal plate size were compared with KruskalWallis and Mann-Whitney Tests. The allometric effect was estimated using Multivariate Regression Analysis, the model of allometric slopes was tested by Multivariate analysis of covariance and the sternal plate shape differences was explored using non-parametric comparisons of Euclidian distances and Neighbour Joinnig trees. The results showed that the morphometric variation of sternal plate of this spiny lobster varied according to the gender since the sexual size and shape dimorphisms were significant. In both sexes, the sternal plate shape differed among oceanographic scenarios as it was evidenced by significant differences among Euclidian distances, and the tendency to cluster by North, Centre and South sections of San Andrés archipelago. Additionally, the morphometric variation resulting from phenotypic plasticity to variable ecological contexts may explain the phenotypic differences among genetically similar populations. This information permits to define management units, support the selection of regulatory policies of this fishery and complement the genetic analysis of the species in this Caribbean region. Rev. Biol. Trop. 64 (3): 975-990. Epub 2016 September 01.

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Sexual Shape Dimorphism of the Mangrove CrabUcides cordatus(Linnaeus, 1763) (Decapoda, Ucididae) Accessed through Geometric Morphometric

Cited by 33 publications

References 39 publications

Reproductive biology of the shrimp Palaemon northropi (Rankin, 1898) (Caridea: Palaemonidae) from an estuary in the Brazilian northeastern

Reproductive biology of the shrimp Palaemon northropi (Rankin, 1898) (Caridea: Palaemonidae) from an estuary in the Brazilian northeastern

Dimorfismo sexual em Hepatus pudibundus (Crustacea, Decapoda, Brachyura)

Variación fenotípica de la langosta espinosa Panulirus argus (Decapoda: Paniluridae) en el Caribe Suroccidental

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