The effect of meal size on the rate of gastric evacuation of burbot, Lota lota (L.)

• Published in: Ecology of Freshwater Fish
• Main Authors: Pääkkönen, J. ‐P. J., Myyrä, R., Marjomäki, T. J.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 1999
• Subjects: Ecology; Aquatic Science; Ecology, Evolution, Behavior and Systematics; Burbot; Lota lota; lota
• Online Access: http://dx.doi.org/10.1111/j.1600-0633.1999.tb00052.x; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1600-0633.1999.tb00052.x; https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1600-0633.1999.tb00052.x

Abstract– The effect of meal size on the gastric evacuation rate of burbot Lota lota (L.), was determined at a constant temperature of 1.5°C. Burbot were fed vendace Coregonus albula (L.), in varying amounts from 1.0% to 12.6% of burbot weight. Although gastric evacuation rate decreased exponentially with increasing meal size, the absolute amount of food evacuated per day (g. day −1 increased when meal size increased. The estimated maximum daily gastric evacuation rates were 0.8, 1.3 and 1.6 g/day with meal sizes 1%, 5% and 10% of burbot weight (200 g). No difference in gastric evacuation rate was observed between meals of the same size (8 g) but which consisted of either one or three vendace.