Poor Quality of Spawning Habitat: A Serious Impediment to Cisco Rehabilitation in the Great Lakes

FWS Agreement Number

30181-8-G016

Study Objectives

1. Measure water quality conditions in lower Green Bay and at the St. Marys River site during winter months.
2. Determine the duration and geographic extent of hypoxic conditions in lower Green Bay and at the St. Marys River site.
3. Compare overwinter survival of cisco eggs in replicated chambers in lower Green Bay with those at the St. Marys River site and under controlled laboratory conditions.
4. Determine whether sediment ATP concentration is an accurate predictor of winter DO conditions.
5. Map water quality and suitability of historic and current cisco spawning habitats in Green Bay and at the St. Marys River site.