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handle: 10261/47159
[ES] Se estudia la ontogenia del tracto digestivo durante el desarrollo larvario de parracho, Scophthalmus rhombus desde la eclosión hasta el día 38, utilizando técnicas histológicas e histoquímicas. Durante la fase de alimentación exógena (4 dde –días después de la eclosión-), tanto la boca como el ano están abiertos y el tracto digestivo está diferenciado en cavidad bucofaríngea, esófago, estómago incipiente e intestinos anterior, medio y posterior. Las glándulas gástricas se diferencian alrededor de los 23 dde e incrementan en número y desarrollo progresivamente. Las células mucosas digestivas son ricas en mucosustancias neutras y/o ácidas. Además, la absorción intestinal lipídica es evidente a los 7-8 dde y las vacuolas supranucleares (micropinocitosis proteica) del intestino posterior se detectaron a los 4 dde. El páncreas exocrino presenta gránulos de zimógeno acidófilos (precursores enzimáticos) a los 2-3 dde y al mismo tiempo se identifican los gránulos de glucógeno hepáticos y el páncreas endocrino.
[EN] The ontogeny of the digestive tract during the larval development of cophthalmus rhombus was studied using histological and histochemical techniques. At exogenous feeding (4 days after hatching –dah-), both the mouth and the anus are opened and the digestive tract was differentiated in bucopharyngeal cavity, oesophagus, incipient stomach, foregut, midgut and hindgut. The gastric glands differentiated around 23 dah. Digestive mucous cells were rich in neutral and/or acidic mucosubstances. Intestinal lipid absorption was evident from 7-8 dah and protein supranuclear vesicles (protein micropynocitosis) of the hindgut were detected at 4 dah. The exocrine pancreas shows, around 2-3 dah, acidophilic zymogen granules (enzymatic precursors) and at the same time the hepatic glycogen granules and endocrine pancreas were identified from 2 dah.
Este trabajo ha sido financiado por los proyectos DIVERAQUA y REDAQUAb del IFAPA (Interreg IIIA: SP5.E36 y SP5.E27/02) y parcialmente por el CSIC (AGL2005-02478 y AGL2006-13777-CO3-O2/ACU).
4 páginas, 2 figuras. XI Congreso Nacional de Acuicultura (Vigo, 24-28 septiembre 2007). Ed. Antonio Cerviño Eiroa, Alejandro Guerra Díaz y Carmen Pérez Acosta.
Peer reviewed
Scophthalmus rhombus L., Organogenesis of the digestive system, Organogénesis digestiva, Brill, Parracho
Scophthalmus rhombus L., Organogenesis of the digestive system, Organogénesis digestiva, Brill, Parracho
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