Development and functional morphology of the larval foregut of two brachyuran species from Northern Brazil

ABRUNHOSA, Fernando Araujo; SIMITH, Darlan de Jesus de Brito; MONTEIRO, Joely Raquel Costa; SOUZA JUNIOR, Antonio Nivaldo de; OLIVA, Pedro Andrés Chira

Artigo

Development and functional morphology of the larval foregut of two brachyuran species from Northern Brazil

Feeding is an important factor for the successful rearing of larvae of the crab species. Further information on the morphological features of the foregut may to reveal larval feeding behaviour and or/whether there is a lecithotrophy in some or even in all stages of the larval cycle. In the present s...

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Autor principal:	ABRUNHOSA, Fernando Araujo
Outros Autores:	SIMITH, Darlan de Jesus de Brito, MONTEIRO, Joely Raquel Costa, SOUZA JUNIOR, Antonio Nivaldo de, OLIVA, Pedro Andrés Chira
Grau:	Artigo
Idioma:	eng
Publicado em:	2012
Assuntos:	Sistema digestório Megalopas Panopeus occidentalis Estômago Uca vocator Zola Caranguejo Crustáceo
Acesso em linha:	http://repositorio.ufpa.br/jspui/handle/2011/3226

id	ir-2011-3226
recordtype	dspace
spelling	ir-2011-32262018-01-22T16:23:02Z Development and functional morphology of the larval foregut of two brachyuran species from Northern Brazil ABRUNHOSA, Fernando Araujo SIMITH, Darlan de Jesus de Brito MONTEIRO, Joely Raquel Costa SOUZA JUNIOR, Antonio Nivaldo de OLIVA, Pedro Andrés Chira Sistema digestório Megalopas Panopeus occidentalis Estômago Uca vocator Zola Caranguejo Crustáceo Feeding is an important factor for the successful rearing of larvae of the crab species. Further information on the morphological features of the foregut may to reveal larval feeding behaviour and or/whether there is a lecithotrophy in some or even in all stages of the larval cycle. In the present study, the structural development of the foregut and their digestive functions were examined in larvae of two brachyurans, Uca vocator and Panopeus occidentalis, reared in the laboratory. During larval development, the foreguts of the larvae in the first and last zoeal stages and in the megalopa stage were microscopically examined, described and illustrated. The zoeal foreguts of both species were well developed, showing specialization with a functional cardiopyloric valve and a filter press. The megalopa stage had a complex and specialized gastric mill similar to that found in adult crabs with the appearance of rigidly calcified structures. These results support the hypothesis that the feeding behaviour of each larval stage is directly related to the morphological structure of the foregut. Such facts strongly indicate that all larval stages of both . vocator and P occidentalis need an external food source before completing the larval development in a planktonic environment. A alimentação é um importante fator para o sucesso no cultivo larval de espécies de caranguejos. Informações sobre as características morfológicas do estômago podem contribuir para revelar o comportamento alimentar larval ou, se há lecitotrofia em algum, ou até mesmo, em todos os estágios do ciclo larval. No presente estudo, o desenvolvimento estrutural do estômago e as funções digestivas foram examinados em larvas de duas espécies de braquiúros, Uca vocator e Panopeus occidentalis, cultivados em laboratório. Durante o desenvolvimento larval, os estômagos das larvas no primeiro e último estágio de zoea e megalopa foram microscopicamente examinados, descritos e ilustrados. Em ambas espécies, o estômago dos estágios de zoea são desenvolvidos e especializados, apresentando uma válvula cardiopilórica e um filtro pilórico funcionais. Oestágio de megalopa possui um moinho gástrico complexo e especializado semelhante àquele encontrado em caranguejos adultos com o aparecimento de estruturas rígidas e calcificadas. Estes resultados apóiam a hipótese de que o comportamento alimentar de cada estágio larval está diretamente relacionado à estrutura morfológica do estômago. Tal fato, fortemente indica que todos os estágios larvais de ambos U. vocator e P. occidentalis necessitam de uma fonte externa de alimento para completar o desenvolvimento larval no ambiente planctônico. 2012-11-27T13:37:02Z 2012-11-27T13:37:02Z 2011-12 Artigo de Periódico ABRUNHOSA, Fernando A. et al. Development and functional morphology of the larval foregut of two brachyuran species from Northern Brazil. Anais da Academia Brasileira de Ciências, Rio de Janeiro, v. 83, n. 4, p. 1269-1278, dez. 2011. Disponível em: <http://www.scielo.br/pdf/aabc/v83n4/aop4511.pdf>. Acesso em: 23 nov. 2012. <http://dx.doi.org/10.1590/S0001-37652011005000045>. 0001-3765 http://repositorio.ufpa.br/jspui/handle/2011/3226 eng Acesso Aberto application/pdf
institution	Repositório Institucional - Universidade Federal do Pará
collection	RI-UFPA
language	eng
topic	Sistema digestório Megalopas Panopeus occidentalis Estômago Uca vocator Zola Caranguejo Crustáceo
spellingShingle	Sistema digestório Megalopas Panopeus occidentalis Estômago Uca vocator Zola Caranguejo Crustáceo ABRUNHOSA, Fernando Araujo Development and functional morphology of the larval foregut of two brachyuran species from Northern Brazil
topic_facet	Sistema digestório Megalopas Panopeus occidentalis Estômago Uca vocator Zola Caranguejo Crustáceo
description	Feeding is an important factor for the successful rearing of larvae of the crab species. Further information on the morphological features of the foregut may to reveal larval feeding behaviour and or/whether there is a lecithotrophy in some or even in all stages of the larval cycle. In the present study, the structural development of the foregut and their digestive functions were examined in larvae of two brachyurans, Uca vocator and Panopeus occidentalis, reared in the laboratory. During larval development, the foreguts of the larvae in the first and last zoeal stages and in the megalopa stage were microscopically examined, described and illustrated. The zoeal foreguts of both species were well developed, showing specialization with a functional cardiopyloric valve and a filter press. The megalopa stage had a complex and specialized gastric mill similar to that found in adult crabs with the appearance of rigidly calcified structures. These results support the hypothesis that the feeding behaviour of each larval stage is directly related to the morphological structure of the foregut. Such facts strongly indicate that all larval stages of both . vocator and P occidentalis need an external food source before completing the larval development in a planktonic environment.
format	Artigo
author	ABRUNHOSA, Fernando Araujo
author2	SIMITH, Darlan de Jesus de Brito MONTEIRO, Joely Raquel Costa SOUZA JUNIOR, Antonio Nivaldo de OLIVA, Pedro Andrés Chira
author2Str	SIMITH, Darlan de Jesus de Brito MONTEIRO, Joely Raquel Costa SOUZA JUNIOR, Antonio Nivaldo de OLIVA, Pedro Andrés Chira
title	Development and functional morphology of the larval foregut of two brachyuran species from Northern Brazil
title_short	Development and functional morphology of the larval foregut of two brachyuran species from Northern Brazil
title_full	Development and functional morphology of the larval foregut of two brachyuran species from Northern Brazil
title_fullStr	Development and functional morphology of the larval foregut of two brachyuran species from Northern Brazil
title_full_unstemmed	Development and functional morphology of the larval foregut of two brachyuran species from Northern Brazil
title_sort	development and functional morphology of the larval foregut of two brachyuran species from northern brazil
publishDate	2012
url	http://repositorio.ufpa.br/jspui/handle/2011/3226
_version_	1832603009510539264
score	11.755432

Development and functional morphology of the larval foregut of two brachyuran species from Northern Brazil

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