Feeding behavior under dark conditions in larvae of sutchi catfish Pangasianodon hypophthalmus

Sutchi catfish Pangasianodon hypophthalmus hatch with morphologically immature sensory organs; however, sensory organs develop rapidly with larval growth. Two-day-old larvae commenced ingesting Artemia nauplii. The larvae displayed many taste buds on the barbels, the head surface, and in the buccal...

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Main Author:	Mukai, Yukinori
Format:	Conference or Workshop Item
Language:	English
Published:	2012
Subjects:	SH Aquaculture. Fisheries. Angling
Online Access:	http://irep.iium.edu.my/27395/ http://irep.iium.edu.my/27395/1/11-1-2012_survival_rate.pptx

id	iium-27395
recordtype	eprints
spelling	iium-273952012-12-17T02:43:28Z http://irep.iium.edu.my/27395/ Feeding behavior under dark conditions in larvae of sutchi catfish Pangasianodon hypophthalmus Mukai, Yukinori SH Aquaculture. Fisheries. Angling Sutchi catfish Pangasianodon hypophthalmus hatch with morphologically immature sensory organs; however, sensory organs develop rapidly with larval growth. Two-day-old larvae commenced ingesting Artemia nauplii. The larvae displayed many taste buds on the barbels, the head surface, and in the buccal cavity. Other sense organs were also well developed at this stage. Feeding experiments revealed that 2-day-old larvae ingested Artemia under both light and dark conditions, moreover, the larvae could ingest frozen dead Artemia. The ingestion rates for 4- and 7-day-old larvae were significantly higher under dark conditions than under light conditions. The rates using frozen dead Artemia were mostly higher than the rates using live Artemia. Therefore, feeding behavior under dark conditions is most likely not mediated by visual or mechanical senses, but rather by chemosensory senses, such as taste buds. Larval fish are vulnerable to predators; thus, if they can search for and eat food at night, they can avoid diurnal predators. The behavior observed here appears to represent their survival strategy. Moreover, these results suggest a new possibility that sutchi catfish larvae can be reared under dark or dim light conditions in order to improve survival and growth rates as in the case of African catfish Clarias gariepinus. 2012 Conference or Workshop Item PeerReviewed application/pdf en http://irep.iium.edu.my/27395/1/11-1-2012_survival_rate.pptx Mukai, Yukinori (2012) Feeding behavior under dark conditions in larvae of sutchi catfish Pangasianodon hypophthalmus. In: IIUM Research, Invention and Innovation Exhibition 2012, 20-22 February 2012, CAC IIUM Gombak.
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	SH Aquaculture. Fisheries. Angling
spellingShingle	SH Aquaculture. Fisheries. Angling Mukai, Yukinori Feeding behavior under dark conditions in larvae of sutchi catfish Pangasianodon hypophthalmus
description	Sutchi catfish Pangasianodon hypophthalmus hatch with morphologically immature sensory organs; however, sensory organs develop rapidly with larval growth. Two-day-old larvae commenced ingesting Artemia nauplii. The larvae displayed many taste buds on the barbels, the head surface, and in the buccal cavity. Other sense organs were also well developed at this stage. Feeding experiments revealed that 2-day-old larvae ingested Artemia under both light and dark conditions, moreover, the larvae could ingest frozen dead Artemia. The ingestion rates for 4- and 7-day-old larvae were significantly higher under dark conditions than under light conditions. The rates using frozen dead Artemia were mostly higher than the rates using live Artemia. Therefore, feeding behavior under dark conditions is most likely not mediated by visual or mechanical senses, but rather by chemosensory senses, such as taste buds. Larval fish are vulnerable to predators; thus, if they can search for and eat food at night, they can avoid diurnal predators. The behavior observed here appears to represent their survival strategy. Moreover, these results suggest a new possibility that sutchi catfish larvae can be reared under dark or dim light conditions in order to improve survival and growth rates as in the case of African catfish Clarias gariepinus.
format	Conference or Workshop Item
author	Mukai, Yukinori
author_facet	Mukai, Yukinori
author_sort	Mukai, Yukinori
title	Feeding behavior under dark conditions in larvae of sutchi catfish Pangasianodon hypophthalmus
title_short	Feeding behavior under dark conditions in larvae of sutchi catfish Pangasianodon hypophthalmus
title_full	Feeding behavior under dark conditions in larvae of sutchi catfish Pangasianodon hypophthalmus
title_fullStr	Feeding behavior under dark conditions in larvae of sutchi catfish Pangasianodon hypophthalmus
title_full_unstemmed	Feeding behavior under dark conditions in larvae of sutchi catfish Pangasianodon hypophthalmus
title_sort	feeding behavior under dark conditions in larvae of sutchi catfish pangasianodon hypophthalmus
publishDate	2012
url	http://irep.iium.edu.my/27395/ http://irep.iium.edu.my/27395/1/11-1-2012_survival_rate.pptx
first_indexed	2023-09-18T20:40:42Z
last_indexed	2023-09-18T20:40:42Z
_version_	1777409345727758336

Feeding behavior under dark conditions in larvae of sutchi catfish Pangasianodon hypophthalmus

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