Vascular corrosion casts of Syngnathus floridae and Syngnathus fuscus brood pouches were examined by scanning electron microscopy. Morphological and quantitative data on the vasculature of the paternal brood pouch during each stage of embryonic development were investigated to explore potential changes during brooding, to consider interspecific differences and to provide structural evidence for previously reported functional r...

Parental nutrient contribution of two closely related, sympatric pipefish species was investigated following exposure to mid‐range environmental concentrations of the polychlorinated biphenyl (PCB) mixture Aroclor 1254 (mean ± s . e . = 52·89 ± 2·12 μg l −1 ). This study tested the hypothesis that differential nutrient supplementation during development predicts interspecific sensitivity to environmental stressors. Specificall...