Fig. 2

Distribution of energy density and reproductive energy by maturity stages for Argentinean shortfin squid. a, ovary energy density; b, energy density of oviduct eggs; c, energy density of nidamental glands; d, reproductive energy, estimated as the sum of the energy accumulated in ovary, nidamental glands and oviduct eggs. The boxplot horizontal line and grey solid point respectively denote the median and mean, while upper and lower hinges respectively represent the 25th and 75th percentiles. The maturity stages were followed the scale proposed by ICES [37] and Lin et al. [38]: III physiologically maturing, IV–V, physiologically mature, VI, functionally mature, and VII, spawning. The sample size by maturity stage was 12 at stage III, 15 at stage IV, 15 at stage V, 15 at stage VI, and 11 at stage VII