Ontogeny of the digestive tract in stinging catfish, Heteropneustes fossilis (Bloch) larvae

Fish Physiology and Biochemistry
Aditya KumarEnric Gisbert

Abstract

Heteropneustes fossilis (Bloch) is an important candidate species for diversification of freshwater aquaculture in India. However, high mortality rate during larval rearing is the most serious bottleneck in commercial production of this species. A proper understanding of the ontogenic development of digestive system provides the basis to understand the nutritional physiology of larvae and develop appropriate feeding strategies. In the present study, the ontogenical development of the digestive tract in H. fossilis larvae was studied from hatching until 30 day post-hatching (dph) at 29 °C. At hatching (2.8 ± 0.2 mm standard length, SL), the digestive tract was undifferentiated and attached dorsally to the yolk sac. At 1 dph (2.9 ± 0.2 mm SL), the mouth opened and oral valves were visible. At 2 dph (3.0 ± 0.3 mm SL), goblet cells were observed in the buccoparyngaeal cavity. At this age, exogenous feeding started and the intestine was differentiated into the anterior and posterior regions, and the rudimentary liver and pancreas were also seen. Small supranuclear vacuoles were observed in the enterocytes of the posterior intestine at 2 dph. Zymogen granules were observed in acinar cells of pancreas by 3 dph, and islets of Langerhan...Continue Reading

References

Dec 12, 2001·Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP·J L Zambonino Infante, C L Cahu
Mar 13, 2008·Anatomia, histologia, embryologia·Z KozarićM Bozić
May 16, 2012·Fish Physiology and Biochemistry·P K PradhanE Gisbert
Jul 22, 2014·Animal : an International Journal of Animal Bioscience·E GisbertM J Darias
Feb 11, 2015·Fish Physiology and Biochemistry·Andressa TelesVinicius Ronzani Cerqueira

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Citations

Apr 10, 2020·Journal of Morphology·Stefania CohenAlcira O Díaz

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Methods Mentioned

BETA
sperm collection

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