Morphogenesis of free neuromasts in the larvae of brown-marbled grouper Epinephelus fuscoguttatus

Lim, Leong Seng and Yukinori Mukai, (2016) Morphogenesis of free neuromasts in the larvae of brown-marbled grouper Epinephelus fuscoguttatus. Marine and Freshwater Behaviour and Physiology, 49 (3). pp. 159-171. ISSN 1023-6244 (Print), 1029-0362 (Online)


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Newly hatched larvae had one pair of free neuromasts behind the eyes. As the larvae grew, free neuromasts increased in number. The apical surface of sensory epithelium widened and subsequently elongated. The number of sensory hair cells increased and the directions of maximum sensitivity became both anteroposterior and dorsoventral on the trunk. Before notochord flexion, only the anteroposterior type was observed. After notochord flexion, two types of neuromasts were observed on the trunk. On the head, the orientation of free neuromasts formed a tangential line to concentric circles around the eyes and nostrils. Free neuromasts on the head could therefore receive stimuli from various angles from predators or zooplanktons. This suggests that these free neuromasts play a role in compensating for a dead angle of vision, and an important role in detecting zooplankton under scotopic vision. Canal organs were observed on the head and operculum in 40-d-old animals.

Item Type: Article
Uncontrolled Keywords: Free neuromasts, cupulae, neuromast morphology, maximum sensitivity, fish larvae, lateral line
Subjects: S Agriculture > SF Animal culture
Divisions: SCHOOL > Borneo Marine Research Institute
Depositing User: Unnamed user with email
Date Deposited: 03 Aug 2016 06:19
Last Modified: 16 Oct 2017 05:25

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