Structure and development of free neuromasts in barramundi, Lates calcarifer (block)

Yukinori, Mukai and Liy, Lang Chai and Sitti Raehanah Muhd. Shaleh and Shigeharu, Senoo (2007) Structure and development of free neuromasts in barramundi, Lates calcarifer (block). Zoological Science, 24 (8). pp. 829-835. ISSN 0289-0003


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This study was conducted to clarify the development of free neuromasts with growth of the barramundi, Lates calcarifer. A pair of free neuromasts was observed behind the unpigmented eyes in newly hatched eleutheroembryos with a mean total length of 1.93 mm, and two-hour-old eleutheroembryos could respond to an approaching pipette. At 2 days after hatching, the egg yolk sac was mostly consumed, the eyes were pigmented, and the larvae commenced feeding on rotifers. Free neuromasts increased in number with growth and commenced developing into canal neuromasts in barramundi 15 days old with a mean total length of 8.07 mm. The average length of the major axis of the trunk free neuromasts attained approximately 12.9-15.5 μm, and the number of sensory cells was 15.4-17.5 at 15-20 days old. Developed cupulae of free neuromasts were observed in 1-day-old eleutheroembryos. The direction of maximum sensitivity of free neuromasts, determined 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. The polarity of trunk neuromasts was usually oriented along the antero-posterior axis of the fish body, but a few had a dorso-ventral direction. On the head, free neuromasts were oriented on lines tangential to concentric circles around the eye. © 2007 Zoological Society of Japan.

Item Type: Article
Keyword: Asian seabass, Barramundi, Eleutheroembryos, Free neuromasts, Larvae, Lateral line, Lates calcarifer
Subjects: Q Science > QL Zoology > QL1-991 Zoology > QL605-739.8 Chordates. Vertebrates > QL614-639.8 Fishes
Department: INSTITUTE > Borneo Marine Research Institute
Depositing User: ADMIN ADMIN
Date Deposited: 04 May 2011 14:39
Last Modified: 16 Oct 2017 13:08

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