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HATCHING GLANDS IN THE TELEOSTS, BRACHYDANIO RERIO. DANIO MALABARICUS, MOENKHAUSIA OLIGOLEPIS AND BARBUS SCHUBERTI
Author(s) -
WILLEMSE M. TH. M.,
DENUCÉ J. M.
Publication year - 1973
Publication title -
development, growth and differentiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.864
H-Index - 66
eISSN - 1440-169X
pISSN - 0012-1592
DOI - 10.1111/j.1440-169x.1973.00169.x
Subject(s) - hatching , danio , biology , barbus , zoology , golgi apparatus , cyprinidae , anatomy , ultrastructure , embryo , microbiology and biotechnology , zebrafish , ecology , fishery , fish <actinopterygii> , biochemistry , endoplasmic reticulum , gene
Many teleost embryos produce an enzyme within specialized glands, which facilitate hatching. The enzyme attacks the chorion which becomes so weak that it may be ruptured easily by a blow of the tail. The embryos of Brachydanio rerio, Danio malabaricus, Moenkhausia oligolepis and Barbus schuberti show some morphological differences in the distribution of the hatching gland cells. More specificity can be found in the ultrastructure of hatching gland cells, which are loaded with enzyme granules prior to hatching. In all four species the nucleus is located near the basis of the cell. The hatching enzyme is contained within granules, which arise from the Golgi body.