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Morphological changes in the structure and function of the feeding appendages and foregut of the larvae and first juvenile of the freshwater prawn Macrobrachium acanthurus

Published online by Cambridge University Press:  09 January 2017

Cristina P. Rocha
Affiliation:
Graduate Program in Environmental Biology, Universidade Federal do Para/IECOS, Campus de Bragança Al. Leandro Ribeiro S/No Aldeia, Bragança, PA 68600-000, Brazil
Manoel Luciano A. Quadros
Affiliation:
Graduate Program in Environmental Biology, Universidade Federal do Para/IECOS, Campus de Bragança Al. Leandro Ribeiro S/No Aldeia, Bragança, PA 68600-000, Brazil
Murilo Maciel
Affiliation:
Aquaculture Laboratory, Universidade Federal do Para/IECOS, Campus de Bragança Al. Leandro Ribeiro S/No Aldeia, Bragança, PA 68600-000, Brazil
Cristiana R. Maciel*
Affiliation:
Aquaculture Laboratory, Universidade Federal do Para/IECOS, Campus de Bragança Al. Leandro Ribeiro S/No Aldeia, Bragança, PA 68600-000, Brazil
Fernando A. Abrunhosa
Affiliation:
Carcinology Laboratory, Universidade Federal do Para/IECOS, Campus de Bragança Al. Leandro Ribeiro S/No Aldeia, Bragança, PA 68600-000, Brazil
*
Correspondence should be addressed to: C.R. Maciel, Universidade Federal do Para/IECOS, Campus de Bragança Al. Leandro Ribeiro S/No Aldeia, Bragança, PA 68600-000, Brazil email: macielufpa@gmail.com

Abstract

The present study describes the morphological changes of the mouthparts and foregut of the freshwater prawn M. acanthurus that occur during the development of the larvae and first juvenile. The results indicate that the zoeae I have mouthparts with reduced setae and a structureless foregut that indicates obligatory lecithotrophic behaviour. There is an increase in the number of setae in these structures between the zoea II and the juvenile stage, indicating the adaptation of the organism for feeding. More complex structural alterations were observed in the first juvenile, which acquires benthonic habits, which ensure the capture and ingestion of a diversity of feeding resources found in the substrate.

Information

Type
Research Article
Copyright
Copyright © Marine Biological Association of the United Kingdom 2017 

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