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Nutritional transition period in early larvae Clarias gariepinus

The nutritional transition period of Clarias gariepinus were described based on the early development from hatching to 120 hours after hatching (hAH) reared at 27.5-28.6oC. Newly hatched larvae had a large greenish yolk sac volume (0.99+0.31 mm3) located below a straight undeveloped digestive tract,...

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Main Authors: Hou Chew, Ha, Siew Ing, Nguang
Format: Article
Language:English
Published: Malaysian Society of Analytical Sciences 2015
Subjects:
Q Science (General)
Online Access:http://eprints.unisza.edu.my/6738/1/FH02-FBIM-15-04070.jpg
http://eprints.unisza.edu.my/6738/
http://www.scopus.com/record/display.uri?eid=2-s2.0-84944744
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spelling my-unisza-ir.67382022-04-03T23:49:35Z http://eprints.unisza.edu.my/6738/ Nutritional transition period in early larvae Clarias gariepinus Hou Chew, Ha Siew Ing, Nguang Q Science (General) The nutritional transition period of Clarias gariepinus were described based on the early development from hatching to 120 hours after hatching (hAH) reared at 27.5-28.6oC. Newly hatched larvae had a large greenish yolk sac volume (0.99+0.31 mm3) located below a straight undeveloped digestive tract, mouth not opened, eyes unpigmented and the larvae lie on the bottom of rearing tank. During endogenous feeding period, the larval feeding system has developed rapidly with development oesophagus. Yolk sac were not completely depleted at the onset of exogenous feeding (36 hAH, 0.19±0.11 mm3), and a period of mixed nutrition was observed up to 68 hAH when yolk was completely exhausted. Yolk sac volume was significantly different by time at hatching, 6, 12 and 18 to 36 hAH (ANOVA, P<0.05). At 36 hAH, the larvae commenced feeding once morphologically developed with opened anus, functional jaw and intestine, and demonstrated horizontally swimming. The rudimentary chemoreceptors like olfactory organs and taste buds that were found on the barbels and oral cavity assisted in food detection and commenced feeding without vision. Due to the cannibalistic behaviour at early stage, feed are suggested to be provided during 36 hAH and avoided delay feeding in the larval rearing. Malaysian Society of Analytical Sciences 2015 Article PeerReviewed image en http://eprints.unisza.edu.my/6738/1/FH02-FBIM-15-04070.jpg Hou Chew, Ha and Siew Ing, Nguang (2015) Nutritional transition period in early larvae Clarias gariepinus. Malaysian Journal of Analytical Sciences, 19 (5). pp. 1120-1130. ISSN 13942506 http://www.scopus.com/record/display.uri?eid=2-s2.0-84944744
institution Universiti Sultan Zainal Abidin
building UNISZA Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Sultan Zainal Abidin
content_source UNISZA Institutional Repository
url_provider https://eprints.unisza.edu.my/
language English
topic Q Science (General)
spellingShingle Q Science (General)
Hou Chew, Ha
Siew Ing, Nguang
Nutritional transition period in early larvae Clarias gariepinus
description The nutritional transition period of Clarias gariepinus were described based on the early development from hatching to 120 hours after hatching (hAH) reared at 27.5-28.6oC. Newly hatched larvae had a large greenish yolk sac volume (0.99+0.31 mm3) located below a straight undeveloped digestive tract, mouth not opened, eyes unpigmented and the larvae lie on the bottom of rearing tank. During endogenous feeding period, the larval feeding system has developed rapidly with development oesophagus. Yolk sac were not completely depleted at the onset of exogenous feeding (36 hAH, 0.19±0.11 mm3), and a period of mixed nutrition was observed up to 68 hAH when yolk was completely exhausted. Yolk sac volume was significantly different by time at hatching, 6, 12 and 18 to 36 hAH (ANOVA, P<0.05). At 36 hAH, the larvae commenced feeding once morphologically developed with opened anus, functional jaw and intestine, and demonstrated horizontally swimming. The rudimentary chemoreceptors like olfactory organs and taste buds that were found on the barbels and oral cavity assisted in food detection and commenced feeding without vision. Due to the cannibalistic behaviour at early stage, feed are suggested to be provided during 36 hAH and avoided delay feeding in the larval rearing.
format Article
author Hou Chew, Ha
Siew Ing, Nguang
author_facet Hou Chew, Ha
Siew Ing, Nguang
author_sort Hou Chew, Ha
title Nutritional transition period in early larvae Clarias gariepinus
title_short Nutritional transition period in early larvae Clarias gariepinus
title_full Nutritional transition period in early larvae Clarias gariepinus
title_fullStr Nutritional transition period in early larvae Clarias gariepinus
title_full_unstemmed Nutritional transition period in early larvae Clarias gariepinus
title_sort nutritional transition period in early larvae clarias gariepinus
publisher Malaysian Society of Analytical Sciences
publishDate 2015
url http://eprints.unisza.edu.my/6738/1/FH02-FBIM-15-04070.jpg
http://eprints.unisza.edu.my/6738/
http://www.scopus.com/record/display.uri?eid=2-s2.0-84944744
_version_ 1729708885603778560
score 13.211869

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