Juvenile development and growth patterns in the mud crab<i>Eurytium limosum</i>(Say, 1818) (Decapoda, Brachyura, Xanthidae) under laboratory conditions

Guimarães, Fernanda Jordão; Negreiros-Fransozo, Maria Lúcia

doi:10.1080/00222930500061254

Cited by 20 publications

(11 citation statements)

References 13 publications

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“…Dead individuals and their respective exuviae were fixed in 80% ethanol and glycerin at 2:1, and stage changes and deaths were recorded. These techniques are similar to those used by Guimarães and Negreiros-Fransozo (2005) and Negreiros-Fransozo et al (2007). All individuals in the different stages were dissected, measured, drawn, and described based on fixed exuviae and dead individuals, using a stereoscopic microscope (Zeiss SV6) or a compound optical microscope (Zeiss Axioskop 2, with Nomarski optics), both equipped with a drawing tube, ocular micrometer, and Axiovision image system.…”

Section: Methodsmentioning

confidence: 48%

Juvenile development of Callinectes danae Smith, 1869 (Crustacea, Decapoda, Brachyura, Portunidae) under laboratory conditions

Bolla

Fransozo

Negreiros-Fransozo

2014

An. Acad. Bras. Ciênc.

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The juvenile development of Callinectes danae was investigated from megalopae obtained in neuston samples at Ubatuba, São Paulo, Brazil. The individuals were raised in the laboratory under constant temperature (25 ± 1°C), filtered sea water from the collection location (35‰), and natural photoperiod. Newly hatched Artemia sp. nauplii were offered as food on a daily basis and ornamental-fish food was also provided for the juveniles from the 4 th stage on. Twelve stages of the juvenile phase were obtained. The main morphological features that allowed recognition of the first juvenile stage were drawn and described. All the subsequent stages obtained were examined and measured, and the main changes in relation to the first stage were recorded. Sexual dimorphism becomes apparent from the fourth juvenile stage onwards. Some appendages and morphological features proved to be of great importance in the identification of species, including the number of segments of the antennal flagellum and the number of setae on the maxilla and on the 1 st , 2 nd and 3 rd maxillipeds. These can probably be used for future comparisons and species identifications.

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Section: Methodsmentioning

confidence: 48%

Juvenile development of Callinectes danae Smith, 1869 (Crustacea, Decapoda, Brachyura, Portunidae) under laboratory conditions

Bolla

Fransozo

Negreiros-Fransozo

2014

An. Acad. Bras. Ciênc.

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“…13b). Dimorphic abdominal growth has also been reported in juveniles of the other brachyurans species (e.g., negreiros- Fransozo et al, 2003;Guimarães and negreiros-Fransozo, 2005;Vinuesa and Ferrari, 2008).…”

Section: First Juvenilementioning

confidence: 97%

Post-larval development and sexual dimorphism of the spider crab <i>Maja brachydactyla</i> (Brachyura: Majidae)

Guerao¹,

Rotllant²

2009

Sci. Mar.

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SummarY: the post-larval development of the majid crab Maja brachydactyla Balss, 1922 was studied using laboratoryreared larvae obtained from adult individuals collected in the ne atlantic. the morphology of the first juvenile stage is described in detail, while the most relevant morphological changes and sexual differentiation are highlighted for subsequent juvenile stages, until juvenile 8. the characteristic carapace spines of the adult phase are present in the first juvenile stage, though with great differences in the degree of development and relative size. the carapace shows a high length/weight ratio, which becomes similar to that of adults at stage 7-8. males and females can be distinguished from juvenile stage 4, based on sexual dimorphism in the pleopods and the presence of gonopores. in addition, the allometric growth of the pleon is sex-dependent from juvenile stage 4, with females showing a positive allometry (b=1.23) and males an isometric allometry (b=1.02).Keywords: majidae, Maja brachydactyla, morphology, juvenile, post-larval development, growth, sexual dimorphism.reSumen: Desarrollo postlarvario y Dimorfismo sexual De Maja brachydactyla (Brachyura: majiDae). -el desarrollo postlarvario del májido Maja brachydactyla ha sido estudiado en el laboratorio después del cultivo larvario realizado a partir de individuos adultos capturados en el ne del atlántico. la morfología del primer estadio juvenil se ha descrito en detalle y el desarrollo juvenil, hasta el estadio 8, ha sido estudiado en lo referente a los cambios morfológicos y la diferenciación sexual. en el primer juvenil, las espinas del cefalotórax características de los adultos están presentes, pero existen grandes diferencias en el grado de desarrollo y el tamaño relativo. el cociente longitud/anchura muestra valores elevados que tienden a parecerse a los de los adultos a partir del juvenil 7-8. machos y hembras se pueden diferenciar a partir del cuarto estadio juvenil, según el dimorfismo sexual en los pleópodos y la presencia de gonoporos. además, existen diferencias sexuales en el crecimiento alométrico del pleon a partir del cuarto estadio juvenil: las hembras muestran una alometría positiva (b= 1.23) y los machos muestran un crecimiento isométrico (b= 1.02).

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“…In both species, only one pair of pleopods is present during the entire juvenile development. However, in P. transversus, as well as in Sesarma rectum Randall, 1840(FRANSOZO 1987, Eriphia gonagra (J.C. Fabricius, 1781) (FRANSOZO & NEGREIROS-FRANSOZO 1987), Eurypanopeus abbreviatus (Stimpson, 1860) (FRANSOZO & NEGREIROS-FRANSOZO 1987) and Eurytium limosum (Say, 1818) (GUIMARÃES & NEGREIROS-FRANSOZO 2005), the pleopods show a varied pattern of development in which the juvenile may present one or two pairs of pleopods.…”

Section: Discussionmentioning

confidence: 99%

Redescription of megalopa and juvenile development of Pachygrapsus gracilis (Decapoda: Grapsidae) from the Amazon region, reared in the laboratory

Arruda¹,

Abrunhosa²

2011

Zoologia (Curitiba, Impr.)

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Juvenile development and growth patterns in the mud crabEurytium limosum(Say, 1818) (Decapoda, Brachyura, Xanthidae) under laboratory conditions

Cited by 20 publications

References 13 publications

Juvenile development of Callinectes danae Smith, 1869 (Crustacea, Decapoda, Brachyura, Portunidae) under laboratory conditions

Juvenile development of Callinectes danae Smith, 1869 (Crustacea, Decapoda, Brachyura, Portunidae) under laboratory conditions

Post-larval development and sexual dimorphism of the spider crab <i>Maja brachydactyla</i> (Brachyura: Majidae)

Redescription of megalopa and juvenile development of Pachygrapsus gracilis (Decapoda: Grapsidae) from the Amazon region, reared in the laboratory

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