Figure 1.

Temperature significantly influences the humoral melanization of Sephadex beads (logistic regression analysis: n = 136; χ² = 17.468, p = 0.004). Data show mean (±s.e.m.) proportion of unmelanized (dashed line), partially (broken line) and fully melanized beads (solid line) recovered at different temperatures 24 h post-injection. Even though more partially melanized beads were recovered at warmer temperatures, the probability of recovering fully melanized beads was highest at 18°C, suggesting that the rate of melanization is higher at cooler temperatures.