Desenvolvimento pós-embrionário de Clibanarius antillensis Stimpson, 1859 (Crustacea, Diogenidae), em laboratório

Abstract

Este trabalho foi realizado com a finalidade de descrever a anatomia externa das larvas de Clibanarius antillensis STIMPSON, 1859 criadas em laboratório. Os estádio de zoea e megalopa foram descritos. Fêmeas ovígeras foram coletadas em praias de S. Sebastião, São Paulo, Brasil. Os animais foram mantidos até a eclosão no laboratório em água do mar filtrada (salinidade 35 °/oo). As larvas foram criadas individualmente e alimentadas com nauplius de Artemia salina e a água foi mudada diariamente. Quatro ou cinco estádios de zoea e megalopa foram obtidos e o período de desenvolvimento foi completado em 39 dias (valor médio) à 18,8°C e 29 dias à 22°C. Comparações anatômicas foram feitas com larvas de outras espécies brasileiras particularmente com as do mesmo gênero. Observou- se estreita correlação entre C.antillensis e C. vittatus (Bosc, 1802).

Egg Production Strategies of the Tropical Hermit Crab Paguristes Tortugae from Brazil

“…Thus, the relatively low fecundity of P. tortugae is compensated for by the larger egg size, which were also larger in larger ovigerous females, that present a greater efficiency in directing energy at egg development after reduction in their somatic growth. According to Brossi-Garcia (1979), eggs with higher yolk quantity favor a rapid metamorphosis, as shown by the 14-day postembryonic development of P. tortugae under laboratory conditions (Hebling and Negreiros-Fransozo, 1983). …”

Fecundity of Three Sympatric Populations of Hermit Crabs (Decapoda, Anomura, Diogenidae)

“…The offspring of C. antillensi s have proportionally more yolk (larger values for the ratio egg diameter/crab shield length) than the offspring of the other two species and thus may be less exposed to harsh biotic (predators) and abiotic conditions for the plankton, given its longer incubation period. In fact, larval development of C. antillensis is shorter (29 days until metamorphosis to megalopa (Brossi-Garcia & Hebling, 1983) than that of C. sclopetariu s (52.5 days, Brossi-Garcia, 1987) and C. vittatus (27.5 to 37.2 days, Lang & Young, 1977). Size-speci c fecundity also varied between two closely located C. antillensis populations .…”

Intraspecific variation in megalopae of Clibanarius antillensis (Anomura, Diogenidae) among western Atlantic populations

“…Identification of the larvae followed current literature (Lang and Young, 1977;Brossi-Garcia, 1987;Sidiqui et al, 1991;Bartilotti et al, 2008;Cházaro-Olvera et al, 2013). After closer inspection, identification of the megalopae of C. antillensis followed two publications (Brossi-Garcia and Hebling, 1983;Siddiqui et al, 1991). We obtained morphometric and meristic features of 96 specimens.…”

“…Chelae equal, with segments smooth; coxa with 3 simple setae; basis with 6 simple setae; ischium with 5 simple setae; merus, longest segment, with 8 simple setae; carpus with 6 Table 2. Comparison of relevant megalopae features of Clibanarius antillensis, collected from a Mexican population to those obtained in laboratory conditions from Brazilian (Bra) (Brossi-Garcia and Hebling, 1983) and Panamanian (Pan) populations (Siddiqui et al, 1991). The same features are compared to C. sclopetarius and C. vittatus collected in the same area ( 1 , Brossi-Garcia, 1987; 2 , Lang and Young, 1977; * obtained from the figure).…”

“…However, morphometry of the larval stages varies within the genus and species can be identified based on specific larval characters (Siddiqui et al, 1991;1993;Bartilotti et al, 2008). Although morphology of larval characters are believed to be species-specific, some morphological variations have been found among larval developmental stages described under laboratory conditions of C. antillensis from Brazil (Brossi-Garcia and Hebling, 1983) and Panama (Siddiqui et al, 1991); these morphological variations are believed to be the result of geographic differences and/or differing laboratory conditions (Siddiqui et al, 1991;Bartilotti et al, 2008).…”