Influence of water level drawdown on the fish populations of Cross Lake, Manitoba /
Regulated discharges into Cross Lake, Manitoba, resulted in average summer water volumes in 1980 and 1981 that were 49% lower than preregulated volumes. Water level drawdown in the summer reduces the amount of available habitat. Consequently, the standing crops of lake whitefish (Coregonus clupeafor...
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| Main Author: | |
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| Additional Author(s): | Patalas, J. W. |
| Report Numbers: | SUS 274 |
| Subjects: | |
| Online Access: | Link to Full Text Link to Full Text |
| Library Holdings: | Print Versions |
| LEADER | 02952cam a2200409Ia 4500 | ||
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| 001 | 2014891 | ||
| 003 | SIRSI | ||
| 005 | 20150121205442.0 | ||
| 007 | ta | ||
| 008 | 140123s1984 xxcab rb 000 0 eng d | ||
| 040 | |a RLA |c RLA |d OCLCF |d RLA | ||
| 035 | |a (OCoLC)868892166 | ||
| 043 | |a n-cn-mb | ||
| 050 | 4 | |a TK1425.S8 |b S9 no. 274 | |
| 088 | |a SUS 274 | ||
| 100 | 1 | |a Gaboury, M. N. | |
| 245 | 1 | 0 | |a Influence of water level drawdown on the fish populations of Cross Lake, Manitoba / |c M.N. Gaboury and J.W. Patalas. |
| 260 | |c 1984. | ||
| 300 | |a p. 118-125 : |b ill., 1 map ; |c 28 cm. | ||
| 510 | 3 | |a Assigned number SUS 274 in the Susitna Aquatic Impact Assessment Project bibliography. | |
| 520 | 3 | |a Regulated discharges into Cross Lake, Manitoba, resulted in average summer water volumes in 1980 and 1981 that were 49% lower than preregulated volumes. Water level drawdown in the summer reduces the amount of available habitat. Consequently, the standing crops of lake whitefish (Coregonus clupeaformis), walleye (Stizostedion vitreum vitreum), northern pike (Esox lucius), and cisco (Coregonus artedii) are lower now than in preregulation and early postregulation years. Unusually early and rapid drawdown in March 1981 resulted in a severe winterkill, causing a substantial decrease in catches per unit of effort (CPUE) for most species from 1980 to 1981. The most affected species were whitefish and cisco, which showed a 50% reduction in CPUE from 1980 to 1981. The amount of fall to late spring drawdown and the year-class strengths of coregonid fishes were inversely related. A marked overwinter drawdown reduces whitefish and cisco hatching success apparently by dewatering their spawning areas and desiccating the eggs. Low water levels in spring prevented pike and walleye access to spawning areas. | |
| 504 | |a Includes bibliographical references (p. 124-125). | ||
| 533 | |a Photocopy. |b [Alaska : |c Susitna Hydroelectric Project, |d between 1984 and 1986]. |e 28 cm. | ||
| 539 | |a q |b 1984 |c 1986 |d aku |e n |g r | ||
| 650 | 0 | |a Fishes |x Effect of water levels on |z Manitoba |z Cross Lake. | |
| 650 | 0 | |a Fishes |z Manitoba |z Cross Lake |x Reproduction. | |
| 650 | 0 | |a Fisheries |x Catch effort |z Manitoba |z Cross Lake. | |
| 650 | 7 | |a Fisheries |x Catch effort. |2 fast |0 (OCoLC)fst00926059 | |
| 650 | 7 | |a Fishes |x Effect of water levels on. |2 fast |0 (OCoLC)fst00926456 | |
| 650 | 7 | |a Fishes |x Reproduction. |2 fast |0 (OCoLC)fst00926594 | |
| 651 | 7 | |a Manitoba |z Cross Lake. |2 fast |0 (OCoLC)fst01203148 | |
| 700 | 1 | |a Patalas, J. W. | |
| 787 | 0 | 8 | |i Originally published in: |a Canadian journal of fisheries and aquatic sciences |d 1984 |g Vol. 41, p. 118-125 |x 0706-652X |
| 856 | 4 | 8 | |3 Link to introductory pages (copyrighted item). |z ARLIS Document Server |u https://www.arlis.org/docs/vol1/Susitna/SUS/2/SUS274_excerpt.pdf |
| 856 | 4 | 8 | |u https://www.arlis.org/docs/vol2/hydropower/SUS274.htm |z Form to request item for ARLIS patrons only (copyrighted item) |
| 596 | |a 9 | ||
| 098 | |a SUS 00274 | ||