Fig. 1. Map of South Florida and the Florida Keys depicting field locations in
Florida Bay (FB-1) and Biscayne Bay (BB-1) where artificial habitats or
shelters were deployed. The FB-1 site was used to document toadfish spawning
activity and sample water for in situ nitrogen excretion within
shelters. BB-1 was used to sample early life history stages of toadfish for
OUC enzyme analysis and to harvest whole nests (shelter + adult + offspring)
for experimental studies.