SciELO - Scientific Electronic Library Online

vol.28 número3Artificial nests as an alternative to studies of arboreal small mammal populations: a five-year study in the Atlantic Forest, BrazilA new species of Seira (Collembola: Entomobryidae: Seirini) from the Northeastern Brazilian coastal region índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados




Links relacionados


Zoologia (Curitiba)

versão impressa ISSN 1984-4670


QUEIROZ, Luciano D.; ABRUNHOSA, Fernando A.  e  MACIEL, Cristiana R.. Ontogenesis and functional morphology of the digestive system of the freshwater prawn, Macrobrachium amazonicum (Decapoda: Palaemonidae). Zoologia (Curitiba, Impr.) [online]. 2011, vol.28, n.3, pp.395-402. ISSN 1984-4670.

The appropriate feeding regime for larvae and post-larvae of crustacean decapods is essential for successful larval culture. Reports on the development and morphology of the mouthparts and foregut of these crustaceans have aided in the selection of appropriate larval foodstuffs and consequently increased larval survival and growth rate during development. In the present study, the functional morphology of foregut and mouthparts was investigated in larvae and post-larvae of the freshwater prawn M. amazonicum (Heller, 1862). From observations gathered on both the outer and inner feeding apparati the first stage larvae have obligatory lecithotrophy and feeding behaviour is initiated after molting to the second stage. The foregut of the larvae undergoes diverse morphological changes during larval development and the larval foregut of this species is primarily a mixing organ due to the absence of gastric mills and similar structures. After metamorphosis into post-larvae, drastic morphological changes occur in the foregut and mouthparts to adapt the animals to feed on the greater diversity of foods that are available in their new benthic habitat.

Palavras-chave : Foregut; larval development; mouthparts; neotropical species.

        · texto em Inglês     · Inglês ( pdf epdf )


Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons