DEVELOPMENTS OF DIGESTIVE TRACT IN LARVAE OF CLIMBING PERCH, Anabas testudineus (Bloch)
Abstract: Climbing perch,
Anabas testudineus (Bloch) is a potential species for aquaculture in
Kalimantan, Indonesia and belongs to Anabantidae family. The development of its
digestive tract was evaluated on larvae reared under culture conditions of
28oC-30oC, from hatching to 30 days after hatching using histological and
morphological methods. The larvae were kept in six 100-L tanks. They were fed
with rotifers and microalgae from day 2nd after hatching to day 10th; Artemia
nauplii from day 7th to day 15th; Artemia meta-nauplii from day 15th to day
20th; and Tubifex worm from day 20th onwards. The development of digestive
tract in climbing perch followed the general pattern described for other
species. Shortly after hatching, its digestive system was found to be consisted
of an undifferentiated straight tube laying dorsally to the yolk sac. At first
feeding (day 2nd), both mouth and anus had opened and the yolk sac was
partially absorbed. On day 3, the digestive tract was fully differentiated into
buccopharynx, esophagus, intestine and rectum. The two pyloric caeca appeared
on day 25th after hatching, indicating the transition from larval to juvenile
stage and acquisition of an adult type of digestion.
Keywords: digestive tract;
larvae; development; climbing perch
Author: Yulintine, Enang
Harris, Dedi Jusadi, Ridwan Affandi, Alimuddin
Journal Code: pperikanangg100021
