| Abstract: | Residues of DDT, PCBs, and dieldrin in Lake Michigan bloaters (Coregonus hoyi) decreased between 1969 and 1986. All values for contaminant residues were measured and reported as I?/g of whole fish, wet weight; the error limits represented the 95% confidence interval half widths. Total DDT content declined 87%, from 9.9 in 1970, when its use was banned, to 1.3 in 1974, and then averaged 0.88 in 1978-1986 with a low of 0.67 in 1986. Between 1976-1986, p,p‘DDD averaged 0.08 and p,p‘DDT avveraged 0.1; p,p‘DDE reached a low of 0.48 in 1980, then averaged 0.53 in 1980-1986. Dieldrin averaged 0.25 until 1974, when it was banned, peaked at 0.55 in 1978, and decreased to 0.20 by 1986. PCBs, first analyzed in 1972, declined 64% (from 5.7 to 2.2) between 1972 and 1980 and were at 1.64 in 1986. The great decline in PCBs occurred following the 1976 ban. A 49% decrease in the lipid content of bloaters from 1980 to 1986 suggested a dietary change possibly due to changing food source makeup. |
| Genre: | Article |
| ProdID: | 1000584 |
| Citation Author: | Hesselberg, Robert J.; Hickey, James P.; Nortrup, David A.; Willford, Wayne A. |
| Citation Contributing Office: | Great Lakes Science Center |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | |
| Citation Editor: | |
| Citation End Page: | 129 |
| Citation Issue: | 1 |
| Citation Keywords: | |
| Citation Language: | English |
| Citation Larger Work Title: | Journal of Great Lakes Research |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | 8 |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | p. 121-129 |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | |
| Citation Series: | |
| Citation Series Code: | |
| Citation Series Number: | |
| Citation Search Results Text: | Contaminant residues in the bloater (Coregonus hoyi) of Lake Michigan, 1969-1986; 1990; Article; Journal; Journal of Great Lakes Research; Hesselberg, Robert J.; Hickey, James P.; Nortrup, David A.; Willford, Wayne A. |
| Citation Start Page: | 121 |
| Citation Volume: | 16 |
| Citation Year: | 1990 |
| Type: | citation/reference |
| Text: | Contaminant residues in the bloater (Coregonus hoyi) of Lake Michigan, 1969-1986; 1990; Article; Journal; Journal of Great Lakes Research; Hesselberg, Robert J.; Hickey, James P.; Nortrup, David A.; Willford, Wayne A. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Mon, 1 Jan 1990 00:00 -0600 |
| Publisher: | |
