Growth of the Euphausiids Thysanoessa inermis , Thysanoessa raschii , and Meganyctiphanes norvegica in a Subarctic Fjord, North Norway

• Published in: Canadian Journal of Fisheries and Aquatic Sciences
• Main Author: Falk-Petersen, Stig
• Format: Article in Journal/Newspaper
• Language: English
• Published: Canadian Science Publishing 1985
• Subjects: Aquatic Science; Ecology, Evolution, Behavior and Systematics; Norway; Midwinter; Meganyctiphanes norvegica; North Norway; Subarctic; Thysanoessa raschii; Thysanoessa inermis
• Online Access: http://dx.doi.org/10.1139/f85-002; http://www.nrcresearchpress.com/doi/pdf/10.1139/f85-002

Growth was studied in terms of the mean carapace length, wet and dry weight, protein, and lipid. Monthly length–weight regressions are presented for a 12-mo period. The growth of Thysanoessa spp. is closely related to phytoplankton production, while Meganyctiphanes norvegica (a carnivore) increases its weight continuously until it reaches its final size. In I-group Thysanoessa the individual maintains its body weight until midwinter, and this is followed by a continuous decrease in the body constituents until the onset of the spring phytoplankton bloom. The growth patterns are correlated with the environmental factors.