Spawning Habitat Unsuitability: An Impediment to Cisco Rehabilitation in Lake Michigan?
| Autor: | Edward S. Rutherford, Marc A. Blouin, Jeff R. Elliott, Bryan J. Sederberg, Charles P. Madenjian |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
education.field_of_study
Ecology biology Spawning habitat Reference site Population Management Monitoring Policy and Law Aquatic Science biology.organism_classification Predation Fishery Habitat destruction Environmental science Water quality Coregonus education Bay Ecology Evolution Behavior and Systematics |
| Zdroj: | North American Journal of Fisheries Management. 31:905-913 |
| ISSN: | 1548-8675 0275-5947 |
| DOI: | 10.1080/02755947.2011.632065 |
| Popis: | The cisco Coregonus artedi was one of the most important native prey fishes in Lake Michigan and in the other four Laurentian Great Lakes. Most of the cisco spawning in Lake Michigan was believed to have occurred in Green Bay. The cisco population in Lake Michigan collapsed during the 1950s, and the collapse was attributed in part to habitat degradation within Green Bay. Winter water quality surveys of lower Green Bay during the 1950s and 1960s indicated that the bottom dissolved oxygen (DO) concentration was less than 2 mg/L throughout much of the lower bay, and most cisco eggs would not successfully hatch at such low DO concentrations. To determine present-day spawning habitat suitability in lower Green Bay, we compared cisco egg survival in lower Green Bay with survival at a reference site (St. Marys River, Michigan–Ontario) during 2009. We also conducted winter water quality surveys in lower Green Bay and the St. Marys River during 2009 and 2010. Cisco egg survival in lower Green Bay averaged... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text