Desenvolvimento pós-embrionário de Pagurus brevidactylus (Stimpson, 1858) (Decapoda, Paguridae), em laboratório

ABSTRACT. LARVAL DEVELOPMENT OF UCA (M/NUCA) BURGERS/ HOLTHUIS (CRUS-TACEA, DECAPODA, OCYPODIDAE), IN THE LABORATORY. Uea (Minuea) burgersi Hollhuis, 1967 was sludied in lhe laboralory under lhe morphological and syslematical sland poinls. One experimenl was carried OUI involving 100 larvae, derived from one ovigerous female collecled in lhe norlh coasl oI' lhe Slale oI' São Paulo, Brazil. The experimenl were carried oul in a c1imalically conlrolled room aI 25± I°C and sleady sallness of34960. The larvae were mainlened individually and food consisled ofrolifers (Braehiolllls plieatil/is) in lhe firsl slage and Artemia sp. in lhe lasl slages. Uea (Minuea) burgersi have five or six zoeal slages and a megalopa one. Ali larval slages were drawn and described in delail. Tables where lhe morphological characlerislic of each slage oflhe sludied specie was described are also included. They were compared wilh the olher species found in lhe bibliography passible oI' being analyzed. The comparalive sludies oI' lhe larval fOlms of each species of Uea showed lhal lhey presenled a greal similarity oI' characlerislics whose specific idenlificalions were only possible wilh lhe aid oI' several slruclures analyzed logelher. In lhe olher hand, lhe differences among lhe genera ofOcypodinae occurring in Brazil are more conclusive, and can be oblained by lhe analyses oI' a few characlerislics. KEY WORDS. Cruslacea, Decapoda, Ocypodidae, Uea, larval developmenl Recentemente, CRANE (1975) realizou uma revisão completa de todas as espécies do gênero Uca, com considerações sistemáticas, evolutivas e comportamentais. No Brasil, o gênero Uca envolve dez espécies, distribuídas em quatro

Section: Methodsunclassified

Desenvolvimento larval de Uca (Minuca) Burgersi Holthuis (Crustacea, Decapoda, Ocypodidae), em laboratório

Rieger

1998

“…Although the post-embryonic development is known for some Brazilian species: Clibanarius antillensis Stimpson, 1859(BROSSI-GARCIA & HEBLING 1983, SIDDIQUI et al 1991, Clibanarius vittatus (Bosc, 1802) (LANG & YOUNG 1977), Clibanarius scloeptarius (Herbst, 1796) (BROSSI-GARCIA 1987), Paguristes tortugae Schmitt, 1933(HEBLING & NEGREIROS-FRANSOZO 1983, Pagurus criniticornis (Dana, 1852) (HEBLING & BROSSI-GARCIA 1981), and Pagurus bravidactylus (Stimpson, 1858) (NEGREIROS-FRANSOZO & HEBLING 1987), studies on the embryonic development are inexistent. The first descriptions of embryonic development of hermit crabs were made in very early studies (RATHKE 1840, MAYER 1877, FAXON 1882, JACKSON 1913, KRAINSKA 1934, 1936, 1938, SCHEIDEGGER 1976, see a more review for crustaceans in ANDERSON 1982).…”

Section: Ura) A) A) A) A) a Descrição Do Desenvolvimento Embrionmentioning

confidence: 99%

Embryonic development and duration of incubation period of tropical intertidal hermit crabs (Decapoda, Anomura)

Turra

Leite

2007

ABSTRACT. The description of the embryonic development of the hermit crabs Clibanarius antillensis Stimpson, 1859, C. sclopetarius (Herbst, 1796), C. vittatus (Bosc, 1802, and Pagurus criniticornis (Dana, 1852) and preliminary observations on the development of Pagurus brevidactylus (Stimpson, 1858) and Paguristes tortugae Schmitt, 1933 were done. The analysis of the external morphology of the embryos of the studied species allowed the identification of seven stages: Stage 1, Zygote and cleavage; Stage 2, Homogeneous mass (advanced cleavage and gastrulation); Stage 3, Initiation of the germinal disc (yolk-free area); Stage 4, Percentage of yolk-free area from 5% to 50-70%; Stage 5, Eye pigmentation (comma-shape) and heart beating; Stage 6, Percentage of yolk-free area from 70-80% to 95%) and eye development to a darkened irregularly-rounded shape; Stage 7, Zoea visible and hatching. Despite all stages were recorded in all species, interespecific differences were recorded in relation to zygote size and embryo color; cleavage, absolute and relative developmental time, and moment eye pigmentation appeared. Such morphological differences may be associated to variations in the yolk amount and composition and reveal different reproductive strategies at least between P. criniticornis and all studied species of Clibanarius.

“…Conforme já foi evidenciado por Negreiros-Fransozo (1984), dos 130 gêneros que constituem a família Xanthidae, apenas 14 são conhecidos com respeito às suas formas larvais, evidenciando uma considerável variação morfológica e indicando a possibilidade de constituirem grupos distintos.…”

Section: Discussão E Conclusõesunclassified

“…Mais recentemente, Negreiros-Fransozo (1984), estudou outras duas espécies: Panopeus americanus Saussure e Eurypanopeus abbreviatus (Stimpson).…”

Section: Introductionunclassified

Desenvolvimento larval de Eriphia gonagra (Fabricius, 1781) (Decapoda, Xanthidae), em laboratório

Fransozo

1987

The post-embryonic development of lhe crab from lhe north coast of São Paulo State, Eriphia gonagra (Fabricius) was studied in laboratory. The experiments were performed in a c/imatically controlled room at 24±1 oe at a salinity of 36%0 and the animais were fed with newly hatched Artemia salina nauplii.The larval development of E. gonagra comprises 4 stages of zoea and one megalopa. Ali larval stages are iIIustrated and described in detail.The main morphological charaçters that allow the identijication of the zoeae and megalopae of E. gonagra are analyzed with respect to other Brasilian species of lhe family Xanthidae.