| temporal and spatial variation in the amount of cadmium in the phantom midge larvae (chaoborus spp.). | several factors, including body size, age, and temporal and spatial variation, which may influence the amount of cadmium (cd) in the phantom midge larvae, chaoborus spp., were examined in eight lakes, four from south-central ontario (dorset region) and four from northwestern ontario (experimental lakes area). all three species of chaoborus (c. punctipennis, c. trivittatus, c. flavicans) found in chub lake (south-central ontario), were analyzed seasonally. one species, c. punctipennis, was collec ... | 1992 | 1456783 |