Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4397611 | Journal of Experimental Marine Biology and Ecology | 2007 | 8 Pages |
Food consumption (FC), specific growth rate (SGR), and gross growth efficiency (GGE) were measured for juvenile walleye pollock (initial size 112–153 mm fork length) fed euphausiids at temperatures (T) between 2 and 16 °C. FC increased up to 12 °C (7.3% of body weight) and was slightly lower at 16 °C. SGR also increased up to 12 °C (2% d− 1) but rapidly decreased at 16 °C. The optimum temperatures for FC and SGR were 12.3 °C and 11.5 °C, respectively. GGE was similar (27.3–29.9%) for temperatures in the range of 2–9 °C and decreased at higher temperatures. GGE in terms of energy (GGE = − 1.37T + 38.41) and the energy density of fish was higher at lower temperatures, suggesting that residence of juvenile pollock in cold water induces energy storage. In the Doto continental-shelf area, juvenile pollock were distributed over a wide range of temperatures (5.4–15.0 °C) during the summer. This suggests that factors other than water temperature may affect the summer distribution of juvenile pollock, although temperature would be the most important factor in a food-unlimited environment.