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The Time‐Course of Hatching Enzyme Secretion in the Sea Urchin Strongylocentrotus purpuratus
Author(s) -
YAGER THOMAS D.,
BARRETT DENNIS
Publication year - 1987
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.1987.00643.x
Subject(s) - strongylocentrotus purpuratus , sea urchin , fishery , hatching , biology , oceanography , ecology , geology
By two independent methods, we have determined approximately the time‐course of hatching enzyme secretion in the sea urchin Strongylocentrotus purpuratus . A quick‐kill method indicates that a significant fraction of the enzyme is secreted between 90% and 97% of the fertilization‐hatching interval. A direct assay method indicates that the remainder of the enzyme is secreted on either side of the 90–97%“window”. The entire period of secretion spans from 75% to 100% or more of the fertilization‐hatching interval. For embryos raised at 15°C this translates to an interval of 4.8 or more hr.