Histological and Morphological Characterization of the Digestive Tract of Southern Hake (Merluccius australis)

Serrano, E; Leiva, C.; Lonza, C; Sanchez, JC; Wacyk J.; Zegers, T; Godoy M.

Keywords: histology, digestive tract, merluccius australis, southern hake, intestinal morphology

Abstract

The anatomy and histology features of alimentary tract of southern hake (Merluccius australis) have been studied in order to understand the digestive physiology and formulate suitable feeds. M. australis has a short oesophagus, large y-shaped stomach and short intestine, and histologically, the digestive tract is formed by four layers: mucosa, submucosa, muscularis and serosa. The oesophagus is a short tubular thick-walled organ with a great distension capacity and abundant mucus secreting goblet cells allowing the passage of large preys. The stomach is large and muscular with high capability for distension. Pyloric caeca were not present. The intestine is short and divided into a proximal middle and distal segment. In the anterior region of the intestine was observed abundant goblet cells, which decreased in the middle region and finally dispersed in the posterior region. Additionally, enterocytes showed an increase in the presence of supranuclear vacuoles at the posterior region of the intestine. The results of this anatomical and histological study indicate that M. australis has a digestive tract similar to other gadiform fishes, which is adapted to digest and absorb protein-rich preys, mainly fish and crustacean.

Más información

Título según WOS: Histological and Morphological Characterization of the Digestive Tract of Southern Hake (Merluccius australis)
Título de la Revista: International Journal of Morphology
Volumen: 32
Número: 3
Editorial: Sociedad Chilena de Anatomía
Fecha de publicación: 2014
Página de inicio: 1079
Página final: 1084
Idioma: Spanish
Notas: ISI