Zoeal morphology of<i>Pachygrapsus gracilis</i>(Saussure, 1858) (Decapoda, Grapsidae) reared in the laboratory

Brossi-Garcia, Ana Luiza; Rodrigues, Misael Domingues

doi:10.1080/07924259.1993.9672352

Cited by 18 publications

(10 citation statements)

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“…ln ali the zoeal instars analyzed in these two species, the antenna is unirreme; there is no exopod development, falling into type D proposed by A/ KAWA (1929) and in contrast to the typical shapes of the family Grapsidae. Finally, both in P. gracilis and in p, transversus, the lateral spines of the carapace are observable from zoea II and not from zoea III, as previously mentioned by BROSSI-GARCIA & RODRIGUES (1993), agreeing in this respect with P. maurus and P. crassipes. ln general, P. gracilis and P. transversus brazilian larvae are extremely similar and can only be distinguished starting from the fourth instar by analysis of the following characteristics: size, number of aesthetascs 01' the antennules, number of cuspidate setae of the basal endites of the maxillules, and number of plumose setae on the scaphognathites of the maxillae (Tab.…”

Section: Discussionsupporting

confidence: 71%

“…A detai led anatomical study of each instar was performed by veritying ali the morphologic variations occurring during metamorphosis. The time intervals between successive ccdysis were also determined, and a comparative analysis between P. transversus and P. gracilis, whose larval morphology was described by BROSSI-GARCIA & RODRIGUES (1993), was finally performedo Other non-Brazilian species ofthe genus Pachygrapsus whose larval instars are known are: P. marmoralus (Fabricius, 1878), P. crassipes Randall, 1840 andP. maurus (Lucas, 1846) studied by CANO (1891), SCHLOTTERBECK (1976) and CUESTA & RODRIGUES (1994), respectively .…”

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confidence: 99%

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Zoeal morphology of Pachygrapsus transversus (Gibbes) (Decapoda, Grapsidae) reared in the laboratory

Brossi-Garcia

Rodrigues

1997

Rev. Bras. Zool.

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ABSTRACT. Ovigerous females 01' Pachygraps/ls IransverslIs (Gibbes, 1850) were collected on the Praia Dura and Saco da Ribeira beaches, Ubatuba, São Paulo, Brazi!. Larvae were individually reared in a climatic ro0111 at 25°C temperature, salinities 01' 28, 32 and 35%. and under natural photoperiod conditions. The best rearing results were observed at 35%. salinity. Seven zoeal instars were observed, drawing and described in detai!. The data are compared with those obtained for P. gracilis (Saussure, 1858). KEY WORDS. Grapsidae, PachygrapslIs Iransversus, larval development, decapodThe genus PachygrapslIs Randall, 1840 is represented by three species along the Brazil ian littoral: P. corrugallls (von Martens, 1872), P. transverSllS (G ibbes, 1850) and P. gracilis (Saussure, 1858), the latter having been recorded for the first time in the state of São Paulo, Brazil, by RODRIGUES & BROSSI-GARCIA (1989) in rocky and sandy-muddy substrates together with P. Iransversus. This species and P. gracilis are quite similar and the traits most often utilized for specific identification have been indicated by RODRIGUES & BROSS1-GARCIA (1989).The larval ontogeny of the family Grapsidae is little known. According to CHACE (195 1), less than 15% ofthe species have been studied from this viewpoint.The main objective of the present investigation was to study the larval development of P. transversus reared in the laboratory and to characterize the plankton phase oflife ofthis species. A detai led anatomical study of each instar was performed by veritying ali the morphologic variations occurring during metamorphosis. The time intervals between successive ccdysis were also determined, and a comparative analysis between P. transversus and P. gracilis, whose larval morphology was described by BROSSI-GARCIA & RODRIGUES (1993), was finally performedo Other non-Brazilian species ofthe genus Pachygrapsus whose larval instars are known are: P. marmoralus (Fabricius, 1878), P. crassipes Randall, 1840 and P. maurus (Lucas, 1846) studied by CANO (1891), SCHLOTTERBECK (1976) and CUESTA & RODRIGUES (1994), respectively .

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Section: Discussionsupporting

confidence: 71%

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confidence: 99%

Zoeal morphology of Pachygrapsus transversus (Gibbes) (Decapoda, Grapsidae) reared in the laboratory

Brossi-Garcia

Rodrigues

1997

Rev. Bras. Zool.

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“…Nos Brachyura o desenvolvimento larval pode passar totalmente dentro do ovo, eclodindo como primeiro estágio juvenil (espécies de água doce e um pequeno número de espécies marinhas) ou possuir de 1 a 13 estágios de zoés dependendo da espécie (Godbody 1960, Brossi-Garcia & Rodrigues 1993. Os estágios larvais podem ser reconhecidos através do número de cerdas nos exopoditos dos maxilípedes sendo que no primeiro estágio tem 4 cerdas, no segundo tem 6 cerdas, no terceiro tem 8 cerdas, a partir do quinto estágio o reconhecimento ocorre pela combinação do número de cerdas nos maxilípedes com o desenvolvimento dos pleópodos (Hyman 1925 Hepatus pudibundus (Herbst, 1785).…”

Section: Número De Estágios Larvaisunclassified

Chave ilustrada para identificação das zoés de Brachyura do estuário da Lagoa dos Patos (RS) e região costeira adjacente

Vieira

Calazans

2010

Biota Neotrop.

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Illustrated key for the identification of the Brachyura zoeal stages from the estuarine and nearby coastal region of the Patos Lagoon (RS). Biota Neotrop. 10(3): http://www. biotaneotropica.org.br/v10n3/en/abstract?identification-key+bn01710032010. Abstract:The goal of this study is to provide an illustrated identification key to distinguish zoeal phase of Brachyuran larvae that occur in the estuarine and nearby coastal region of the Patos Lagoon. The key includes species, collected monthly, using a conical net (165 cm long, 60 cm mouth and 330 µm mesh). Sampling was carried out on surface and deep waters. The identification was based on specimens reared under laboratory conditions as well as from previous published studies. This key was constructed upon external morphological characters, easy to observe under a stereomicroscope and moreover, the presentation of figures allows a non-specialist to make identifications more easily. Resumo: O objetivo do presente estudo é a elaboração de uma chave de identificação ilustrada das espécies de Brachyura que ocorrem no estuário da Lagoa dos Patos e sua região costeira adjacente. A chave abrange espécies as quais foram coletadas mensalmente, usando uma rede de plâncton (165 cm de comprimento, 60 cm de boca e 330 µm de malha). As amostragens foram realizadas na superfície e fundo. Os especimens foram identifcados mediante comparação com larvas cultivadas em laboratório e com descrições já existentes. A chave utiliza caracteres que não sofrem grandes transformações ao longo do desenvolvimento, e a utilização de figuras para ilustrar a chave permite a não especialistas facilmente identificar as espécies. Palavras-chave: Brachyura, Fase zoé, larva, chave de identificação. IntroduçãoO estudo da fase larval permite conhecer o ciclo de vida das espécies contribuindo para o conhecimento básico em biologia e ecologia servindo como ferramenta para avaliação do recrutamento, principalmente de espécies de interesse pesqueiro. Os estágios de zoés dos Brachyura ocorrem inteiramente na coluna d'água, livre das adaptações convergentes e divergentes sofridas pelos adultos devido aos diferentes habitats em que ocorrem e para a maioria das espécies esta fase é a principal fonte de dispersão geográfica. A constância dos caracteres nas larvas faz com que a morfologia larval represente um elemento taxonômico adicional para a identificação e classificação das espécies sendo que os primeiros trabalhos a utilizar as larvas dividiram os grupos baseados primeiramente na presença ou não de espinhos na carapaça, na morfologia do exopodito antenal e na armadura do telso (Hyman 1925, Lebour 1928, Aikawa 1929, 1933, 1937, Rice 1980, Martin 1984. A área estuarina da Lagoa dos Patos é de 971 km 2 conectandose ao Oceano Atlântico em sua porção Sul por um único canal de 20 km de extensão e com largura variável entre 0,5 a 3 km. Essa área juntamente com a região costeira adjacente destaca-se entre os ambientes costeiros do Sudoeste Atlântico por sua importância ecológica e sócio-econômica (Asmus & Tagliani ...

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“…According to the life cycle of the genus Pachygrapsus, females with eggs are present from April to November; the number of eggs varies between 8,000 and 10,000 (Crichton, 1960;Williams, 1984). The number of zoeal stages is variable: in P. crassipes J. W. Randall, 1840 and P. marmoratus (Fabricius, 1787) five stages have been observed, whereas P. gracilis has 13 zoeal stages (Brossi-García & Domingues, 1993). The megalopa of P. gracilis has recently been described (Cházaro-Olvera et al, 2006).…”

Section: Introductionmentioning

confidence: 96%

Transport of Pachygrapsus Gracilis (De Saussure, 1858) Megalopae From a Lagoon System Inlet in the Southwestern Gulf of Mexico

Cházaro–Olvera

Arellano-Rodarte

Rocha–Ramírez

2007

Crustac

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Megalopae of the wharf crab, Pachygrapsus gracilis were collected in the two inlets of the Alvarado Lagoon System, i.e., Alvarado Lagoon Inlet (ALI) and Camaronera Lagoon Inlet (CLI). The sampling period included January to October 2005. Collections were taken over a 13 h period with a conical plankton net of 243 µm mesh that filtered during 15 min. every hour. Simultaneously, we recorded water temperature, salinity, current velocity, and flow direction. Megalopa density was standardized as number/1000 m 3 and data were log 10 normalized. Multiple correlations of density vs. water temperature, salinity, and current velocity were tested. The density between the two sampling inlets was compared with analysis of variance (ANOVA). A total of 15,454 megalopae was collected in the two inlets, 1,413 from ALI and 14,044 from CLI. The highest density was in July with 2,788 megalopae/1000 m 3 . The average temperature in ALI was 27.49 ± 3.36 • C, in CLI 27.49 ± 3.84 • C; salinity in ALI was 7.06 ± 4.49 psu, in CLI 14.86 ± 8.96 psu; and current velocity in ALI was 1.22 ± 0.64 m s −1 , in CLI 0.72 ± 0.44 m s −1 . During this study, the existence of recruitment peaks between 19:00 h and 03:00 h was determined. Significant multiple correlations were found (P < 0.05) between the densities of the megalopae and environmental factors. The ANOVA showed significant differences between the densities at the two inlets in September, October, and January, whereas March, June, and July did not show significant differences. This indicates that recruitment is related to a continuous global process, i.e., seasonal and temporal reproductive pulses, as well as to the shape of the inlet. RESUMENSe colectaron megalopas del cangrejo de muelle, Pachygrapsus gracilis en dos bocas de comunicación Crustaceana 80 (8): 955-968 Also available online: www.brill.nl/cr 956 SERGIO CHÁZARO-OLVERA ET AL.la Laguna de Camaronera (CLI). El muestreo se realizó de enero a octubre de 2005. Las colectas se tomaron durante 13 horas, con una red cónica del plancton con malla de 243 micras, el filtrado se realizó durante 15 min. cada hora. Simultáneamente, registramos la temperatura del agua, la salinidad, la dirección y velocidad de la corriente. La densidad de megalopas fue estandardizada a número/1000 m 3 y los datos fueron normalizados con logaritmo (log 10 ). Se aplicó un análisis de correlación múltiple entre la densidad y la temperatura de agua, salinidad y velocidad de la corriente. La densidad entre las dos bocas fue comparada con análisis de varianza (ANOVA). Se colectaron en total 15.454 megalopas en las dos bocas de comunicación, 1.413 en ALI y 14.044 en CLI. La mayor densidad fue en julio con 2.788 megalopas/1000 m 3 . La temperatura media en el ALI fue de 27,49 ± 3,36 • C, en CLI 27,49 ± 3,84 • C; salinidad en ALI fue 7,06 ± 4,49 psu, en CLI 14,86 ± 8,96 psu, y la velocidad de corriente en ALI fue de 1,22 ± 0,64 ms −1 , en CLI 0,72 ± 0,44 ms −1 . En este estudio, se registraron picos de densidad entre las 19:00 y 03:00 hrs. Los índices de correlación múl...

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Zoeal morphology ofPachygrapsus gracilis(Saussure, 1858) (Decapoda, Grapsidae) reared in the laboratory

Cited by 18 publications

References 4 publications

Zoeal morphology of Pachygrapsus transversus (Gibbes) (Decapoda, Grapsidae) reared in the laboratory

Zoeal morphology of Pachygrapsus transversus (Gibbes) (Decapoda, Grapsidae) reared in the laboratory

Chave ilustrada para identificação das zoés de Brachyura do estuário da Lagoa dos Patos (RS) e região costeira adjacente

Transport of Pachygrapsus Gracilis (De Saussure, 1858) Megalopae From a Lagoon System Inlet in the Southwestern Gulf of Mexico

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