Abstract
Hatching is a process in which the developing fish embryo emerges from its envelope. In the words of ‘Yamagami (1988)’ it changes from an ‘intracapsular’ to a ‘free-living’ life. In different species hatching takes place at different developmental times of the embryo (Fig. 1/1). ‘Yamagami’ distinguished between mechanical and enzymatic hatching. Enzymatic shedding of the envelope is brought about mainly by the secretion of a proteolytic enzyme by unicellular hatching glands (UHG), which are of ecto-and/or endodermal origin. The hatching enzyme dissolves the inner layers of the envelope; this is followed by the lashing movements of the embryo, which result in breaking of the envelope.
‘There is no final experiment. Nature like a mirage, constantly challenges our perception. Science, at best, is really an art of partial truths.’
Rajendra Raghow
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© 2004 Springer Science+Business Media Dordrecht
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Kunz, Y.W. (2004). Hatching. In: Developmental Biology of Teleost Fishes. Fish & Fisheries Series, vol 28. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-2997-4_16
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DOI: https://doi.org/10.1007/978-1-4020-2997-4_16
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