00000000nam 2200000zi 4500
0019.950337
003CaOODSP
00520250528081541
006m     o  d f      
007cr mn|||||||||
008250423e198111##oncab   ob   f000 0 eng d
040 |aCaOODSP|beng|erda|cCaOODSP
0410 |aeng|beng|bfre
043 |an-cn-on
0861 |aFs97-4/1622E-PDF|zFs97-4/1622
1001 |aMinns, Charles Kenneth, |d1947- |eauthor.
24510|aAcid rain : |ba preliminary estimate of the risk to Ontario's inland fisheries / |cby C.K. Minns.
264 1|aBurlington, Ontario : |bGreat Lakes Biolimnology Laboratory, Department of Fisheries and Oceans, Canada Centre for Inland Waters, |cNovember 1981.
264 4|c©1981
300 |a1 online resource (vi, 36 pages) : |billustrations, map.
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aCanadian manuscript report of fisheries and aquatic sciences, |y0706-6473 ; |v1622
500 |aDigitized edition from print [produced by Department of Fisheries and Oceans].
504 |aIncludes bibliographical references (page 36).
5203 |a"The lake inventory database of the Ontario Ministry of Natural Resources, in conjunction with counts of numbers and areas of lakes by watershed and size, are used to estimate the quantity of Ontario's inland fishery resources which are at risk from acid precipitation. The inventory data include conductivity, pH, morphometry and fish community information. These data are taken to be representative of the total, after correction for the over representation of brook trout, Salvelinus fontinalis. Lakes are classified according to acid stress, sensitivity, and fish community. The results indicate that up to 350000 hectares of lakes (16000) are in areas where the precipitation pH is low and the lake waters poorly buffered. The lakes in this condition mostly contain salmonid dominated fish communities, lake trout, Salvelinus namaycush, and/or brook trout. If these lakes are acidified to the point where they are incapable of sustaining fish communities, Ontario stands to lose more than 30% of some key salmonid fisheries. Among the 16000 lakes, there are 4600 which must be considered as being already acidified. Many of these lakes are small and are in the Sudbury-La Cloche region, where previous studies have identified many larger lakes as having been acidified, predominately as a result of local smelter operations"--Abstract, page iii.
546 |aIncludes abstracts in English and French.
650 0|aFreshwater fishes|xEffect of acid precipitation on|zOntario.
650 0|aLake acidification|xEnvironmental aspects|zOntario.
650 6|aPoissons d'eau douce|xEffets des précipitations acides sur|zOntario.
650 6|aLacs|xAcidification|xAspect de l'environnement|zOntario.
7101 |aCanada. |bDepartment of Fisheries and Oceans, |eissuing body.
7102 |aGreat Lakes Biolimnology Laboratory, |eissuing body.
830#0|aCanadian manuscript report of fisheries and aquatic sciences ;|v1622.|w(CaOODSP)9.505211
85640|qPDF|s804 KB|uhttps://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-4/Fs97-4-1622-eng.pdf