Douglas F. Markle and Kenneth G. Waiwood
Huntsman Marine Laboratory
St. Andrews, New Brunswick, Canada EOG 2XO
Source - Journal of Northwest Atlantic Fishery Science, Volume 6(1): 87-93
ISSN-0250-7408
Markle, D.F. and Waiwood, K.G. 1985. Fertilization Failure in Gadids: Aspects of its Measurement. J. Northw. Atl. Fish. Sci. 6(1): 87-93. https://doi.org/10.2960/J.v6.a8
Abstract
Recent studies implicate the old idea of fertilization failure as a potential cause of early "mortality" in some fishes. Laboratory studies with cod (Gadus morhua) and pollock (Pollachius virens) indicate that detection of unfertilized eggs in plankton samples may be difficult but that this can be enhanced by an acidic fixative and gentle capture methods. Morphogenesis of unfertilized eggs does not seem to be strongly canalized: eggs may or may not become activated, form a "blastodisc" or form cytoplasmic "atolls" or"islets". However, the latter seems to be a distinctive feature of unfertilized eggs. Analysis of 9.894 field-caught eggs that were fixed in Stockard's solution showed that 40% were mechanically damaged (perivitelline membrane destroyed) and at least 37% of the remaining precleavage eggs were unfertilized.
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Language - English
Publisher - Northwest Atlantic Fisheries Organization (NAFO), Dartmouth, N.S., Canada
Publication Date - June 1985
Publication Type - Journal Article
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