de Souza, A.S., da Costa R.M. and Abrunhosa F.A. 2013. The complete larval development of Panopeus lacustris Desbonne 1867 (Brachyura: Panopeidae), from the Amazon region, reared in the laboratory. -Acta Zoologica (Stockholm) 94: 308-323.Larvae of the mud crab Panopeus lacustris were reared in laboratory from ovigerous females collected in the estuarine area of the Caeté River in the Amazonian region. The complete development of this species consisted of four zoeal and one megalopal stages, which were described and illustrated in detail. The results are compared with those of other previous studies on larval development of the species belonging to the genus Panopeus and then briefly discussed. Acta Zoologica (Stockholm) 94: 308-323 (July 2013) de Souza et al. • The complete larval development of Panopeus The complete larval development of Panopeus • de Souza et al. Acta Zoologica (Stockholm) 94: 308-323 (July 2013) Ó 2012 The Authors Acta Zoologica (Stockholm) 94: 308-323 (July 2013) de Souza et al. • The complete larval development of Panopeus
Larvae of many marine decapod crustaceans are released in unpredictable habitats with strong salinity Xuctuations during the breeding season. In an experimental laboratory study, we investigated the inXuence of seven diVerent salinities (0, 5, 10, 15, 20, 25 and 30) on the survival and development time of Wddler crab zoea larvae, Uca vocator, from northern Brazilian mangroves. The species reproduces during the rainy season when estuarine salinity strongly Xuctuates and often reaches values below 10 and even 5. Salinity signiWcantly aVected the survival rate and development period from hatching to megalopa, while the number of zoeal stages remained constant. In salinities 0 and 5, no larvae reached the second zoeal stage, but they managed to survive for up to 3 (average of 2.3 days) and 7 days (average of 5.1 days), respectively. From salinity 10 onwards, the larvae developed to the megalopal stage.However, the survival rate was signiWcantly lower (5-15%) and development took more time (average of 13.5 days) in salinity 10 than in the remaining salinities (15-30). In the latter, survival ranged from 80-95% and development took 10-11 days. Given the 100% larval mortality in extremely low salinities and their increased survival in intermediate and higher salinities, we conclude that U. vocator has a larval 'export' strategy with its larvae developing in oVshore waters where salinity conditions are more stable and higher than in mangrove estuaries. Thus, by means of ontogenetic migration, osmotic stress and resulting mortality in estuarine waters can be avoided.
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.