A Morphohistological and Histochemical study of hatchery-reared European hake, Merluccius merluccius (Linnaeus, 1758), during the lecito-exotrophic larval phase
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AuthorsOrtiz-Delgado, J.B.; Iglesias-Estévez, J. (José); Sánchez-Conde, F.J. (Francisco Javier); Cal, R. (Rosa); Lago-Rouco, M.J. (María Jesús); Otero-Pinzas, J.J. (Juan José); Sarasquete, C. (Carmen)
The larval development of reared European hake, Merluccius merluccius (Linnaeus, 1758), during the lecithotrophic phase, from hatching until 5 days post-hatching (dph), and throughout the endo-exotrophic feeding phase (6-10 dph) was studied by histology and histochemistry. Many crucial morphological, cellular and tissular changes were observed during both feeding phases, mostly those related to digestive and visual ontogenetic events, such as differentiation of buccopharyngeal cavity and eye development (at hatching); pigmentation and differentiation of cone-photoreceptors (4 dph); opening of the mouth and anus, appearance of intestinal valves (5-6 dph); presence of buccopharyngo-esophageal (5-6 dph) and intestinal (9 dph) mucous cells; folding of intestinal mucosa (6 dph); development of regional specific digestive musculature (6 dph); typical structure and functionality of the liver (sinusoids, biliary and pancreatic ducts, glycogen, protein and lipid reserves) (4-6 dph); and charact ...
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