Size-specific vertical distribution of Baltic cod (Gadus morhua L.) eggs in the Bornholm Basin in 1993 and 1994

• Published in: ICES Journal of Marine Science
• Main Authors: Wlodarczyk, Ewa, Horbowa, Katarzyna
• Format: Text
• Language: English
• Published: Oxford University Press 1997
• Subjects: Articles; Gadus morhua
• Online Access: http://icesjms.oxfordjournals.org/cgi/content/short/54/2/206; https://doi.org/10.1006/jmsc.1996.0186

The vertical distribution of Baltic cod eggs in relation to seawater density in the Bornholm Basin is described. Mean egg diameters, measured on preserved material, were found to be inversely proportional to ambient water density. The mean depths of the centre of egg mass, z, were 66 m and 59 m in 1993 and 1994, respectively, the shallower location in 1994 being related to the larger modal egg diameter in that year. The analysis of egg abundance in two developmental groups showed that older eggs were consistently more abundant in the 10-m depth layer immediately below the layer of z occurrence.