Visual thresholds for feeding and optimum light intensity for larval rearing of Asian seabass, Lates calcarifer (Bloch)

This study examined the retinomotor responses and prey ingestion rates of 10-, 15-, 20- and 30-day-old Asian seabass Lates calcarifer under different light intensities from 0 to 1000 lx to determine the visual thresholds. Subsequently, two age groups of seabass larvae were reared under light in...

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Main Authors:	Mukai, Yukinori, Lim, Leong Seng
Format:	Article
Language:	English English
Published:	Wiley-Blackwell 2014
Subjects:	SH Aquaculture. Fisheries. Angling
Online Access:	http://irep.iium.edu.my/27860/ http://irep.iium.edu.my/27860/ http://irep.iium.edu.my/27860/ http://irep.iium.edu.my/27860/1/aquaculture_research_2012.pdf http://irep.iium.edu.my/27860/4/27860_visual%20thresholds_scopus.pdf

id	iium-27860
recordtype	eprints
spelling	iium-278602017-09-19T01:22:09Z http://irep.iium.edu.my/27860/ Visual thresholds for feeding and optimum light intensity for larval rearing of Asian seabass, Lates calcarifer (Bloch) Mukai, Yukinori Lim, Leong Seng SH Aquaculture. Fisheries. Angling This study examined the retinomotor responses and prey ingestion rates of 10-, 15-, 20- and 30-day-old Asian seabass Lates calcarifer under different light intensities from 0 to 1000 lx to determine the visual thresholds. Subsequently, two age groups of seabass larvae were reared under light intensities of 10, 100 and 1000 lx to determine the optimum illumination in hatchery tanks. Retinomotor response was absent in 10-day-old larvae, but quite marked in 15- and 20-day-old seabass at 1 lx and higher. Ingestion of Artemia nauplii by 10-day-old larvae was almost zero at <1 lx, increased significantly at 1 lx, and was maximal at 10–100 lx. Artemia ingestion under dim light <1 lx improved with age, and older larvae took more prey in complete darkness due to the presence of rod cells (and also free neuromasts). Larvae from 13 to 26 days group had similar survival and growth at 10–1000 lx, however, from 5 to 10 days group showed similar survival rate with highest weight gain at 100 lx. Therefore, we recommend that hatchery rearing tanks be illuminated such that the larvae in the water are exposed to approximately100 lx. Wiley-Blackwell 2014 Article PeerReviewed application/pdf en http://irep.iium.edu.my/27860/1/aquaculture_research_2012.pdf application/pdf en http://irep.iium.edu.my/27860/4/27860_visual%20thresholds_scopus.pdf Mukai, Yukinori and Lim, Leong Seng (2014) Visual thresholds for feeding and optimum light intensity for larval rearing of Asian seabass, Lates calcarifer (Bloch). Aquaculture Research, 44. ISSN 1365-2109 http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2109.2012.03213.x/abstract doi:10.1111/j.1365-2109.2012.03213.x
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English English
topic	SH Aquaculture. Fisheries. Angling
spellingShingle	SH Aquaculture. Fisheries. Angling Mukai, Yukinori Lim, Leong Seng Visual thresholds for feeding and optimum light intensity for larval rearing of Asian seabass, Lates calcarifer (Bloch)
description	This study examined the retinomotor responses and prey ingestion rates of 10-, 15-, 20- and 30-day-old Asian seabass Lates calcarifer under different light intensities from 0 to 1000 lx to determine the visual thresholds. Subsequently, two age groups of seabass larvae were reared under light intensities of 10, 100 and 1000 lx to determine the optimum illumination in hatchery tanks. Retinomotor response was absent in 10-day-old larvae, but quite marked in 15- and 20-day-old seabass at 1 lx and higher. Ingestion of Artemia nauplii by 10-day-old larvae was almost zero at <1 lx, increased significantly at 1 lx, and was maximal at 10–100 lx. Artemia ingestion under dim light <1 lx improved with age, and older larvae took more prey in complete darkness due to the presence of rod cells (and also free neuromasts). Larvae from 13 to 26 days group had similar survival and growth at 10–1000 lx, however, from 5 to 10 days group showed similar survival rate with highest weight gain at 100 lx. Therefore, we recommend that hatchery rearing tanks be illuminated such that the larvae in the water are exposed to approximately100 lx.
format	Article
author	Mukai, Yukinori Lim, Leong Seng
author_facet	Mukai, Yukinori Lim, Leong Seng
author_sort	Mukai, Yukinori
title	Visual thresholds for feeding and optimum light intensity for larval rearing of Asian seabass, Lates calcarifer (Bloch)
title_short	Visual thresholds for feeding and optimum light intensity for larval rearing of Asian seabass, Lates calcarifer (Bloch)
title_full	Visual thresholds for feeding and optimum light intensity for larval rearing of Asian seabass, Lates calcarifer (Bloch)
title_fullStr	Visual thresholds for feeding and optimum light intensity for larval rearing of Asian seabass, Lates calcarifer (Bloch)
title_full_unstemmed	Visual thresholds for feeding and optimum light intensity for larval rearing of Asian seabass, Lates calcarifer (Bloch)
title_sort	visual thresholds for feeding and optimum light intensity for larval rearing of asian seabass, lates calcarifer (bloch)
publisher	Wiley-Blackwell
publishDate	2014
url	http://irep.iium.edu.my/27860/ http://irep.iium.edu.my/27860/ http://irep.iium.edu.my/27860/ http://irep.iium.edu.my/27860/1/aquaculture_research_2012.pdf http://irep.iium.edu.my/27860/4/27860_visual%20thresholds_scopus.pdf
first_indexed	2023-09-18T20:41:17Z
last_indexed	2023-09-18T20:41:17Z
_version_	1777409381830230016

Visual thresholds for feeding and optimum light intensity for larval rearing of Asian seabass, Lates calcarifer (Bloch)

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