Figure 3.

Log₁₀ fat mass in relation to log₁₀ dry body mass for juveniles and adult males in four populations of the amphipod Gammarus minus. Least squares regression lines and equations are shown (numbers in parentheses are 95% confidence intervals for the intercepts and slopes; r = correlation coefficient; N = sample size; P = probability that the correlation is due to chance). Scaling relationships for two populations in springs without fish predators (Cottus cognatus) (A,B), for two populations with fish predators (C,D), for all four populations compared (E), and for the populations with versus without fish, each analyzed collectively (F).