Daily ration estimates for yellowfin sole, Limanda aspera (Pallas), based on laboratory consumption and growth

• Published in: Journal of Fish Biology
• Main Authors: Smith, R. L., Paul, A. J., Paul, J. M.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 1991
• Subjects: Bering Sea; Gulf of Alaska; Alaska
• Online Access: http://dx.doi.org/10.1111/j.1095-8649.1991.tb03110.x; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1991.tb03110.x; https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1991.tb03110.x

Several estimates of minimal energy requirements for yellowfin sole were made. Energy expenditures of 1.6, 4.1 and 8.3 cal g −1 day −1 were obtained from starvation weight loss, standard metabolism and maintenance ration procedures, respectively, at 6° C. The temperature effect on energy requirement was reflected in the Q 10 values for starvation weight loss (2.0), standard metabolism (6.3) and maintenance ration (6.5). Both energy intake and weight of food were linearly related to, and good predictors of, laboratory growth. These relationships were used to estimate the food and energy intake necessary for yellowfin sole to achieve a year's growth in the natural environment. Based on a caloric value of 2.0 kcal g −1 of food (herring fillets), yellowfin would require 0.35 to 0.39% body weight day −1 at 3° C to achieve the mean growth rate exhibited in the Bering Sea. To achieve Gulf of Alaska growth rates at 5 to 6° C, yellowfin would require 0.63% body weight day −1 . Based on a caloric value of 0.57 kcal g −1 of food (chopped octopus), yellowfin would require 0.83% body weight per day to achieve the Gulf of Alaska growth rate (6° C). These requirements based on the calorific value of herring fillets, which are three to five times higher than previous estimates of daily ration in this species, are probably conservative estimates since many of their prey species have a lower energy content.