Intestinal morphology and histology of the striped catfish Pseudoplatystoma fasciatum (Linnaeus, 1766) fed dry diets |
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| Authors: | APO RODRIGUES P PAULETTI L KINDLEIN JEP CYRINO EF DELGADO & R MACHADO-NETO |
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| Institution: | Departamento de Zootecnia, Laboratório de Anatomia e Fisiologia Animal, Escola Superior de Agricultura 'Luiz de Queiroz', Universidade de São Paulo, Piracicaba, São Paulo, SP, Brazil;;Inspeção e Tecnologia de Carnes e Produtos Derivados, Universidade Federal do Rio Grande do Sul, Faculdade de Veterinária, Porto Alegre, Rio Grande do Sul, RS;;Departamento de Zootecnia, Setor de Piscicultura, Escola Superior de Agricultura 'Luiz de Queiroz', Universidade de São Paulo, Piracicaba, São Paulo, SP, Brazil |
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| Abstract: | This study unveils histological features of the intestinal tract of juvenile striped catfish Pseudoplatystoma fasciatum (Linnaeus, 1776) in three size classes (weight, standard length): I – 36.84 ± 10.19 g, 14.52 ± 1.54 cm; II – 59.03 ± 11.47 g, 17.17 ± 1.06 cm; III – 89.72 ± 18.70 g, 20.79 ± 1.55 cm, respectively. Histological organization of the juvenile speckled catfish intestine bears features common to the carnivorous fish, but the organ presents some convolutions that indicate a certain degree of dietary flexibility, a surprising trend, common only to omnivorous Siluriforms. The architecture of the mucosa of the speckled catfish intestine indicates that the species concentrates digestion and absorption of nutrients in the medium intestine, a common feature among carnivorous Teleosts. |
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| Keywords: | gut mucosa intestinal morphology Pseudoplatystoma fasciatum striped catfish |
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