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Pattern formation of the ‘Tilapia mark’ in the tilapia fish, Oreochromis mossambicus (1994)

Lim, K. E. K. ; Lam, N. H. ; Phang, V. P. E. ; [et al.]

Oxford, UK : Blackwell Publishing Ltd

Journal of fish biology 45 (1994), S. 0

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ISSN: 1095-8649

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Biology

Notes: The dorsal fin of the larval and juvenile Oreochromis mossambicus exhibits a unique black spot known as the ‘Tilapia mark’. We traced its development and found that it occupied a specific position in the dorsal fin bounded by rays 15 and 20. Ablation experiments carried out on the larval dorsal fin showed that this spot region constituted a developmental positional field. This positional field in the fin could regenerate and re-establish the spot pattern despite repeated perturbation. The re-establishment of spot was not simply due to fin injury since ablation of the non-spotted region of the dorsal and the tail fin did not result in aggregation of melanophores. We propose that that‘Tilapia mark’ is a result of positional information in operation.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1095-8649.1994.tb01309.x

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