| Abstract: | Periodid midwinter, early spring, and summer mortalities of alewives (Alosa pseudoharengus) have been common in the Great Lakes since the first appearance of the silvery marine invader in Lake Ontario in the mid-1870‘s. In 1967 a nationally publicized dieoff of tremendous magnitude (estimated at several hundred million pounds of fish) in Lake Michigan resulted in losses to industry,municipalities, and recreational interests in excess of $100 million. The cause of these mortalities is still unclear. The apparent inability of this primarily marine species to adjust completely to the Great Lakes has several suspected causes, among which failure to adjust to temperature extremes and fluctuations in the Great Lakes now appears to be of primary importance. Other possible causes are exhaustion of the food supply, failure to osmoregulate (maintain a suitable chemical balance) adequately in fresh water, failure to extract sufficient iodine from the iodine-poor Great Lakes, and a combination of these several possibilities. |
| Genre: | Article |
| ProdID: | 1000120 |
| Citation Author: | Colby, Peter J. |
| Citation Contributing Office: | Great Lakes Science Center |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | |
| Citation Editor: | |
| Citation End Page: | 27 |
| Citation Issue: | 2 |
| Citation Keywords: | |
| Citation Language: | English |
| Citation Larger Work Title: | Limnos |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | 9 |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | p. 18-27 |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | |
| Citation Series: | |
| Citation Series Code: | |
| Citation Series Number: | |
| Citation Search Results Text: | Alewife dieoffs: Why do they occur?; 1971; Article; Journal; Limnos; Colby, Peter J. |
| Citation Start Page: | 18 |
| Citation Volume: | 4 |
| Citation Year: | 1971 |
| Type: | citation/reference |
| Text: | Alewife dieoffs: Why do they occur?; 1971; Article; Journal; Limnos; Colby, Peter J. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Fri, 1 Jan 1971 00:00 -0600 |
| Publisher: | |
