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 .
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.