F. 1.—Numbers of (a) breeding Ambŋstoma maculatum adults (R2 ¼ IG 0.46, P ¼ 0.03), (b) split by sex (females, R2 ¼ 0.02, P ¼ 0.67; males, R2 ¼ 0.68, P ¼ 0.003), and (c) counts of breeding females plotted alongside egg mass counts and numbers of emerging juveniles from 2005 to 2014 in Taylor–Ochs Pond, Ohio. Numbers near the bottom of (b) reflect sex ratios (male:female), and numbers near the bottom of (c) reflect recruitment rates (emerging juveniles per breeding female) for each year. Significant negative linear relationships of overall breeding adults (a) and breeding males (b) over time are represented by the equations y ¼ 46.1x þ 93246.0 and y ¼ 41.6x þ 84148.9, respectively.