Development of free neuromasts with special reference to sensory polarity in larvae of the willow shiner, Gnathopogon elongatus caerulescens (teleostei, cyprinidae)

To find how larval fish sense mechanical stimuli via their free neuromasts, we examined morphological changes in free neuromasts in the larval willow shiner, Gnathopogon elongatus caerulescens. Free neuromasts were found on the body surface of newly hatched larvae and their number increased on both...

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Main Authors:	Mukai, Yukinori, Kobayashi, Hiroshi
Format:	Article
Language:	English
Published:	Zoological Society of Japan 1995
Subjects:	SH Aquaculture. Fisheries. Angling
Online Access:	http://irep.iium.edu.my/11300/ http://irep.iium.edu.my/11300/ http://irep.iium.edu.my/11300/ http://irep.iium.edu.my/11300/1/mukai1995zoological_science.pdf

id	iium-11300
recordtype	eprints
spelling	iium-113002012-05-11T07:50:48Z http://irep.iium.edu.my/11300/ Development of free neuromasts with special reference to sensory polarity in larvae of the willow shiner, Gnathopogon elongatus caerulescens (teleostei, cyprinidae) Mukai, Yukinori Kobayashi, Hiroshi SH Aquaculture. Fisheries. Angling To find how larval fish sense mechanical stimuli via their free neuromasts, we examined morphological changes in free neuromasts in the larval willow shiner, Gnathopogon elongatus caerulescens. Free neuromasts were found on the body surface of newly hatched larvae and their number increased on both the head and trunk with larval growth. The apical surface of free neuromasts changed in outline from a circle to a lozenge shape as the number of sensory cells increased in the prelarval stage, and then the cupulae of the free neuromasts changed from a stick-like to a blade-like shape. Seven-day-old larvae were at the postlarval stage and had many free neuromasts that were nearly mature. All free neuromasts contained sensory cells of opposing polarity. The orientation of the 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 of the free neuromasts, and was in the same axis as the direction in which the blade-like cupulae bent. The change to a blade-like shape would cause a stimulus parallel to the minor axis to be perceived as being stronger than the same stimulus from other directions. The polarity of trunk neuromasts was usually oriented along the antero-posterior axis of the fish body, but a few had dorso-ventral orientation. On the head, free neuromasts were oriented on lines tangential to concentric circles around the eye. Zoological Society of Japan 1995 Article PeerReviewed application/pdf en http://irep.iium.edu.my/11300/1/mukai1995zoological_science.pdf Mukai, Yukinori and Kobayashi, Hiroshi (1995) Development of free neuromasts with special reference to sensory polarity in larvae of the willow shiner, Gnathopogon elongatus caerulescens (teleostei, cyprinidae). Zoological Science, 12 (1). pp. 125-131. ISSN 0289-0003 (P) http://www.bioone.org/doi/abs/10.2108/zsj.12.125 10.2108/zsj.12.125
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 Kobayashi, Hiroshi Development of free neuromasts with special reference to sensory polarity in larvae of the willow shiner, Gnathopogon elongatus caerulescens (teleostei, cyprinidae)
description	To find how larval fish sense mechanical stimuli via their free neuromasts, we examined morphological changes in free neuromasts in the larval willow shiner, Gnathopogon elongatus caerulescens. Free neuromasts were found on the body surface of newly hatched larvae and their number increased on both the head and trunk with larval growth. The apical surface of free neuromasts changed in outline from a circle to a lozenge shape as the number of sensory cells increased in the prelarval stage, and then the cupulae of the free neuromasts changed from a stick-like to a blade-like shape. Seven-day-old larvae were at the postlarval stage and had many free neuromasts that were nearly mature. All free neuromasts contained sensory cells of opposing polarity. The orientation of the 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 of the free neuromasts, and was in the same axis as the direction in which the blade-like cupulae bent. The change to a blade-like shape would cause a stimulus parallel to the minor axis to be perceived as being stronger than the same stimulus from other directions. The polarity of trunk neuromasts was usually oriented along the antero-posterior axis of the fish body, but a few had dorso-ventral orientation. On the head, free neuromasts were oriented on lines tangential to concentric circles around the eye.
format	Article
author	Mukai, Yukinori Kobayashi, Hiroshi
author_facet	Mukai, Yukinori Kobayashi, Hiroshi
author_sort	Mukai, Yukinori
title	Development of free neuromasts with special reference to sensory polarity in larvae of the willow shiner, Gnathopogon elongatus caerulescens (teleostei, cyprinidae)
title_short	Development of free neuromasts with special reference to sensory polarity in larvae of the willow shiner, Gnathopogon elongatus caerulescens (teleostei, cyprinidae)
title_full	Development of free neuromasts with special reference to sensory polarity in larvae of the willow shiner, Gnathopogon elongatus caerulescens (teleostei, cyprinidae)
title_fullStr	Development of free neuromasts with special reference to sensory polarity in larvae of the willow shiner, Gnathopogon elongatus caerulescens (teleostei, cyprinidae)
title_full_unstemmed	Development of free neuromasts with special reference to sensory polarity in larvae of the willow shiner, Gnathopogon elongatus caerulescens (teleostei, cyprinidae)
title_sort	development of free neuromasts with special reference to sensory polarity in larvae of the willow shiner, gnathopogon elongatus caerulescens (teleostei, cyprinidae)
publisher	Zoological Society of Japan
publishDate	1995
url	http://irep.iium.edu.my/11300/ http://irep.iium.edu.my/11300/ http://irep.iium.edu.my/11300/ http://irep.iium.edu.my/11300/1/mukai1995zoological_science.pdf
first_indexed	2023-09-18T20:20:38Z
last_indexed	2023-09-18T20:20:38Z
_version_	1777408082749423616

Development of free neuromasts with special reference to sensory polarity in larvae of the willow shiner, Gnathopogon elongatus caerulescens (teleostei, cyprinidae)

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