Esterase profile in the postembryonic development of Rhipicephalusmicroplus

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Postembryonic development of Macrobrachium petronioi (Caridea : Palaemonidae) in the laboratory

Macrobrachium petronioi, a native Brazilian fresh-water shrimp, was captured along the coast of Rio Branco, Cananeia, São Paulo State, Brazil. The eggs were green-black in early development and the average size was 1.21 mm by 0.98 mm. Macrobrachium petronioi has no free-swimming larval phase. However, newly hatched larvae possessed several zoea I characters. Therefore, they were clearly more developed than newly hatched larvae of other species of Macrobrachium with prolonged larval development. The average duration of larval development in M. petronioi was 5.5 days. During early development, the larvae subsisted on stored yolk. After the third molt, the postlarvae accepted food. The three zoeal stages prior to the postlarval stage were described and characterized, with detailed morphological analyses. This species has a partially abbreviated type of development. The larval development of M. petronioi is distinguished from that of M. potiuna.

On the Apterous Line of the Termite Velocitermes heteropterus (Isoptera: Termitidae): Developmental Pathways and Cellulose Digestion

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Bioecologia de Anastrepha fraterculus (Wiedemann, 1830) (Diptera: Tephritidae) em videira

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Preferência alimentar e desenvolvimento de Cerotoma arcuata (Olivier) (Coleoptera: Chrysomelidae) em soja

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

ONTOGENETIC DEVELOPMENT OF SENSORY STRUCTURES ON THE ANTENNULES AND ANTENNAE OF THE GIANT RIVER PRAWN MACROBRACHIUM ROSENBERGII (DE MAN)

In this study the occurrence of sensory structures on the antennules and antennae of the giant river prawn Macrobrachium rosenbergii (De Man) during postembryonic ontogenetic development were examined. Larvae and postlarvae were obtained from hatchery recirculating tanks, juveniles from indoor nursery tanks, and adults from earthen grow-out ponds. The animals were fixed with Karnovsky fixative and dissected. Antennules and antennae were removed, metal-coated, and photodocumented using a scanning electron microscope. The antennules have aesthetascs and simple plumose and pappose setae; the antennae have simple, plumose and pappose setae. These structures increase in density, covered surface, and distribution during ontogeny and should be related to chemoreception and mechanoreception. The antennular statocyst that appears during larval stage VII of the giant river prawn has an array of sensory structures that enable the perception of chemical and tactile stimuli beginning with its early life stages. The ontogenetic changes observed allow an inference that initial-stage larvae, advance-stage larvae, juveniles, and adults have different capacities to exploit the environment.