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040 |aCaOODSP|beng|erda|cCaOODSP
0410 |aeng|beng|bfre
043 |an-cn-bc
045 |ax4x8
0861 |aFs97-6/1638E-PDF|zFs97-6/1638E
1001 |aKadowaki, R., |eauthor.
24510|aStock assessment of early run Skeena River coho salmon and recommendations for management / |cby R.K. Kadowaki.
264 1|aNanaimo, British Columbia : |bDepartment of Fisheries and Oceans, Biological Sciences Branch, Pacific Biological Station, |cJuly 1988.
264 4|c©1988
300 |a1 online resource (iv, 29 pages) : |billustrations, maps.
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aCanadian technical report of fisheries and aquatic sciences, |x0706-6457 ; |vno. 1638
500 |aDigitized edition from print [produced by Department of Fisheries and Oceans].
504 |aIncludes bibliographical references (pages 10-11).
5203 |a"Concerns have previously been expressed for the stock status of early run Skeena River coho salmon because of declining escapement levels. Available data on spawning escapements and subsequent recruitment were analyzed using a Ricker model under various assumptions about fishery interception rates to derive maximum sustainable yield (MSY) escapement levels. A key feature of this analysis was the use of a test fishing index, collected in a consistent manner since 1956, to derive the escapement to the river-mouth, rather than the usual visual observations made on the spawning grounds. The major weakness of the analysis was the number of assumptions that had to be made about the catch distribution of the stock. An escapement level of 33,000 spawners is recommended to achieve MSY. Recent estimates of spawning escapement levels (1985 to 1987) are only 61 percent of the MSY level. Previous stock concerns appear to be valid and extremely serious. Recommendations for future research and stock monitoring are also made"--Abstract, page iii.
546 |aIncludes abstracts in English and French.
650 0|aCoho salmon|zBritish Columbia|zSkeena River.
650 0|aFish stock assessment|zBritish Columbia|zSkeena River.
650 0|aEscapement (Fisheries)|zBritish Columbia|zSkeena River.
650 6|aSaumon coho|zColombie-Britannique|zSkeena, Fleuve.
650 6|aRessources halieutiques|xÉvaluation|zColombie-Britannique|zSkeena, Fleuve.
650 6|aÉchappée (Pêches)|zColombie-Britannique|zSkeena, Fleuve.
7101 |aCanada. |bDepartment of Fisheries and Oceans, |eissuing body.
7102 |aPacific Biological Station (1972- ), |eissuing body.
830#0|aCanadian technical report of fisheries and aquatic sciences ;|vno. 1638.|w(CaOODSP)9.504449
85640|qPDF|s422 KB|uhttps://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-6/Fs97-6-1638-eng.pdf