Development of free neuromasts in larvae of mouse grouper, Cromileptes altivelis

This study was conducted to clarify the development of free neuromasts in larvae of mouse grouper Cromileptes altivelis. A pair of free neuromasts was observed behind the eyes in newly hatched larvae. The number of free neuromasts increased with larval growth. Three-day-old larvae started ingestin...

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Main Authors: Daning Tuzan, Audrey, Mukai, Yukinori, Senoo, Shigeharu
Format: Proceeding Paper
Language:English
Published: INOC-UMS 2006
Subjects:
Online Access:http://irep.iium.edu.my/11259/1/mukai_iccosma_p162.pdf
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author Daning Tuzan, Audrey
Mukai, Yukinori
Senoo, Shigeharu
author_facet Daning Tuzan, Audrey
Mukai, Yukinori
Senoo, Shigeharu
author_sort Daning Tuzan, Audrey
collection IIUM
description This study was conducted to clarify the development of free neuromasts in larvae of mouse grouper Cromileptes altivelis. A pair of free neuromasts was observed behind the eyes in newly hatched larvae. The number of free neuromasts increased with larval growth. Three-day-old larvae started ingesting rotifers and had 6 pairs of free neuromasts on the head and 4 free neuromasts on the unilateral side of the trunk. Free neuromasts were distributed around the eyes on the head, and on the middle of the trunk. The apical surface of the free neuromasts changed in outline from a circular shape to a lozenge shape, suggesting that the shape of the cupula changes from a stick-like shape to a vane-like shape. The number of sensory cells of the free neuromasts increased with larval growth. The orientation of physiological maximum sensitivity of free neuromasts, decided from the polarity of the sensory cells, coincided with the minor axis of the lozenge-shaped outline of the apical surface. The polarity of the trunk neuromasts was usually oriented along the antero-posterior axis of the fish body, but a few had dorso-ventral orientation. On the head, the free neuromasts were oriented on lines tangential to concentric circles around the eye, hence the free neuromasts on the head could detect stimuli from various angles. It was considered that free neuromasts of mouse grouper play an important role in avoiding predators, especially until the eyes begin to function.
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spelling oai:generic.eprints.org:112592013-07-08T01:57:53Z http://irep.iium.edu.my/11259/ Development of free neuromasts in larvae of mouse grouper, Cromileptes altivelis Daning Tuzan, Audrey Mukai, Yukinori Senoo, Shigeharu QL Zoology QP Physiology This study was conducted to clarify the development of free neuromasts in larvae of mouse grouper Cromileptes altivelis. A pair of free neuromasts was observed behind the eyes in newly hatched larvae. The number of free neuromasts increased with larval growth. Three-day-old larvae started ingesting rotifers and had 6 pairs of free neuromasts on the head and 4 free neuromasts on the unilateral side of the trunk. Free neuromasts were distributed around the eyes on the head, and on the middle of the trunk. The apical surface of the free neuromasts changed in outline from a circular shape to a lozenge shape, suggesting that the shape of the cupula changes from a stick-like shape to a vane-like shape. The number of sensory cells of the free neuromasts increased with larval growth. The orientation of physiological maximum sensitivity of free neuromasts, decided from the polarity of the sensory cells, coincided with the minor axis of the lozenge-shaped outline of the apical surface. The polarity of the trunk neuromasts was usually oriented along the antero-posterior axis of the fish body, but a few had dorso-ventral orientation. On the head, the free neuromasts were oriented on lines tangential to concentric circles around the eye, hence the free neuromasts on the head could detect stimuli from various angles. It was considered that free neuromasts of mouse grouper play an important role in avoiding predators, especially until the eyes begin to function. INOC-UMS 2006 Proceeding Paper PeerReviewed application/pdf en http://irep.iium.edu.my/11259/1/mukai_iccosma_p162.pdf Daning Tuzan, Audrey and Mukai, Yukinori and Senoo, Shigeharu (2006) Development of free neuromasts in larvae of mouse grouper, Cromileptes altivelis. In: International Conference on "Coastal Oceanography and Sustainable Marina Aquaculture, Confluence & Synergy", 2nd-4th May 2006, Kota Kinabalu, Sabah.
spellingShingle QL Zoology
QP Physiology
Daning Tuzan, Audrey
Mukai, Yukinori
Senoo, Shigeharu
Development of free neuromasts in larvae of mouse grouper, Cromileptes altivelis
title Development of free neuromasts in larvae of mouse grouper, Cromileptes altivelis
title_full Development of free neuromasts in larvae of mouse grouper, Cromileptes altivelis
title_fullStr Development of free neuromasts in larvae of mouse grouper, Cromileptes altivelis
title_full_unstemmed Development of free neuromasts in larvae of mouse grouper, Cromileptes altivelis
title_short Development of free neuromasts in larvae of mouse grouper, Cromileptes altivelis
title_sort development of free neuromasts in larvae of mouse grouper cromileptes altivelis
topic QL Zoology
QP Physiology
url http://irep.iium.edu.my/11259/1/mukai_iccosma_p162.pdf
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AT mukaiyukinori developmentoffreeneuromastsinlarvaeofmousegroupercromileptesaltivelis
AT senooshigeharu developmentoffreeneuromastsinlarvaeofmousegroupercromileptesaltivelis