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040 |aCaOODSP|beng|erda|cCaOODSP
0410 |aeng|beng|bfre
043 |an-cn-mb
045 |ax5x7
0861 |aFs97-4/1555E-PDF|zFs97-4/1555|z97-4/1555
1001 |aBodaly, R. A. |q(Richard Andrew)|eauthor.
24510|aPost-impoundment changes in commercial fishing patterns and catch of lake whitefish (Coregonus clupeaformis) in Southern Indian Lake, Manitoba / |cby R.A. Bodaly, T.W.D. Johnson, and R.J.P. Fudge.
264 1|aWinnipeg, Manitoba : |bWestern Region, Department of Fisheries and Oceans, |cApril 1980.
264 4|c©1980
300 |a1 online resource (iv, 14 pages) : |billustrations, maps.
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aCanadian manuscript report of fisheries and aquatic sciences, |y0706-6473 ; |vno. 1555
500 |a"This is the 21st Manuscript Report from the Western Region, Winnipeg."
500 |aDigitized edition from print [produced by Department of Fisheries and Oceans].
504 |aIncludes bibliographical references (pages 5-6).
5203 |a"Prior to flooding, the commercial lake whitefish (Coregonus clupeaformis (Mitchill)) catch from Southern Indian Lake was composed almost totally of light colored, export or A grade fish. Since flooding in late 1976, dark colored lake whitefish have made up from 12 to 72% of the catch. Dark colored lake whitefish are graded as continental or B grade fish on the basis of darker external coloration and higher average Triaenophorus crassus cyst counts than light lake whitefish. These dark lake whitefish are entering the commercial catch because of a major shift in the geographical location of the majority of fishing effort in the Loon Narrows area of the lake. In 1972, almost all fishing effort was located south of Sand Point while in 1979 a majority of fishing effort was deployed north of Sand Point. In 1979, the proportion of dark fish in lake whitefish catches south of Sand Point was usually low whereas dark fish generally made up 100% of catches north of Sand Point. The shift in fishing effort has apparently been the result of decreased catches in traditional fishing areas. The average lake whitefish catch per unit of effort for fish landed at Loon Narrows decreased 30% from 1972 to 1979 while the average catch per unit effort for traditional (pre-flooding) fishing areas south of Sand Point decreased 40%. It is hypothesized that this decrease in catch per unit effort on traditional fishing grounds has been due to changes in the movement of fish brought about by decreased light penetration due to higher post-impoundment turbidity levels from extensive shore erosion"--Abstract, page iv.
546 |aIncludes abstracts in English and French.
650 0|aLake whitefish fisheries|zManitoba|zSouthern Indian Lake.
650 0|aLake whitefish|xQuality|zManitoba|zSouthern Indian Lake.
650 0|aLake whitefish|xEffect of turbidity on|zManitoba|zSouthern Indian Lake.
650 0|aFisheries|xCatch effort|zManitoba|zSouthern Indian Lake.
650 0|aFisheries|xFishing effort.
650 6|aGrand corégone|xPêche commerciale|zManitoba|zIndiens, Lac sud des.
650 6|aGrand corégone|xQualité|zManitoba|zIndiens, Lac sud des.
650 6|aGrand corégone|xEffets de la turbidité sur|zManitoba|zIndiens, Lac sud des.
650 6|aPêches|xMortalité par pêche|zManitoba|zIndiens, Lac sud des.
650 6|aPêches|xEffort de pêche.
7101 |aCanada. |bDepartment of Fisheries and Oceans, |eissuing body.
7101 |aCanada. |bDepartment of Fisheries and Oceans. |bWestern Region, |eissuing body.
830#0|aCanadian manuscript report of fisheries and aquatic sciences ;|vno. 1555.|w(CaOODSP)9.505211
85640|qPDF|s679 KB|uhttps://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-4/Fs97-4-1555-eng.pdf