Gut Histology of Malaysian River Catfish, Mystus nemurus (C&V) Larvae
Ghada Ahmed El Hag1, Mohd Salleh Kamarudin2, Che Roos Saad2 and Siti Khalijah Daud3
1Department of Fisheries Science, Faculty of Agricultura Technology and Fisheries Science, University of Alneelain, Khartoum, Sudan.P.O.Box:12702.
2Faculty of Agriculture, Department of Aquaculture, University Putra Malaysia,
3Faculty of Sciences Universitiy Putra Malaysia, 43400 UPM, Serdang, Selangor D. E., Malaysia
Abstract: For the successful weaning of M. nemurus larvae, the development of gut histology was observed. The eggs hatched two days after firtelization (2 daf) and most of the larvae hatched within 2-4 daf. The commencement of external feeding start on the 4 days post-hatch (dph). Fish larvae are charactrized by digestive system and diets that differ from adults. Larvae undergo a pattern of trophic ontogeny, changing with inceasung size, and these changes result in differences in digestive requierments. The histological development of the gut of M. nemurus larvae were investigated from hatching untile 21dph using a compound microscopy. During the yolk sac period, the gut is a simple, straight, undifferntiated tube thrghout its length.by 4-5 dph the gut differentiated to the oesophgus, stomach, and intestine. At first feeding, the larval gut is functional, but is structurally and functionally less complex than that of adults.By the 13 dph the larvae attained four tissue layers arrangement.
[Ghada Ahmed El Hag, Mohd Salleh Kamarudin, Che Roos Saad and Siti Khalijah Daud. Gut Histology of Malaysian. Life Sci J 2012;9(1):342-347]. (ISSN: 1097-8135). http://www.lifesciencesite.com. 49
Key words: Malaysian river catfish; larvae; gut histology; Mystus nemerus.