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Ontogenetic Development of Digestive Tract and Enzymes Activity in Hatchery-reared Pink Ear Emperor, Lethrinus lentjan Larvae

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Relation http://eprints.cmfri.org.in/16527/
https://www.trjfas.org/content.php?id=129
 
Title Ontogenetic Development of Digestive Tract and Enzymes
Activity in Hatchery-reared Pink Ear Emperor, Lethrinus lentjan Larvae
 
Creator Siju, R
Anil, M K
Sawant, Paramita Banerjee
Babitha Rani, A M
Ambarish, Gop P
Gomathi, P
Surya, S
 
Subject Fish biology
Aquaculture
Hatchery
Ornamental Fishes
 
Description Ontogenetic development of the digestive tract and associated organs of Lethrinus
lentjan larvae was were learned by observing changes in external morphology,
histology, and enzymatic changes from hatchling to 40-day post-hatching (dph).
Ontogenetic development of the L. lentjan digestive system can be divided into three
major stages; the first stage from hatching of larvae to complete absorption of yolksac, which ends on 2 dph, the second stage from 3 to 15 dph i.e., from exogenous
feeding to the formation of the gastric gland and third stage till completion of
metamorphosis (35 dph). Pyloric caeca were developed after 20 dph, which was
formed entirely by 27 dph. Enzymatic activities of amylase, lipase, trypsin and
chymotrypsin were detected before the onset of exogenous feeding and pepsin was
detected from 19 dph onwards in L. lentjan. So considering both histology of digestive
tract and enzyme development, weaning of L. lentjan larvae to artificial diet can be
practiced after 19-20 dph coinciding with the formation of pyloric caeca and
production of pepsin enzyme for better digestibility and consequently better growth
and survival. The present study can be expended as a reference guide to understand
the digestive tract development and successful hatchery rearing of other economically
important marine fishes
 
Date 2021
 
Type Article
PeerReviewed
 
Format text
 
Language en
 
Identifier http://eprints.cmfri.org.in/16527/1/Turkish%20Journal%20of%20Fisheries%20and%20Aquatic%20Sciences_2021_Anil%20M%20K.pdf
Siju, R and Anil, M K and Sawant, Paramita Banerjee and Babitha Rani, A M and Ambarish, Gop P and Gomathi, P and Surya, S (2021) Ontogenetic Development of Digestive Tract and Enzymes Activity in Hatchery-reared Pink Ear Emperor, Lethrinus lentjan Larvae. Turkish Journal of Fisheries and Aquatic Sciences, 23 (5). pp. 1-14. ISSN 2149 - 181X