Fish embryo culture: observations on axial cord differentiation in presomitic isolates of the zebrafish Brachydanio rerio (Hamilton-Buchanan)

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Abstract
Eighteen pre- and post-rhombencephalic axial isolates from zebrafish, Brachydanio rerio, presomitic embryos divested of epidermis and yolk were maintained in a nutrient medium for 14 days at 24 ± 2 °C. The paper focuses on the differentiation of the notochord and metamerism of axial somites in culture. The technique is proposed as a possible means for studying parameters pertaining to meristic variation in developing fish embryos.