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External sex determination of lake trout (Salvelinus namaycush), white sucker (Catostomus commersoni) and lake whitefish (Coregonus clupeaformis) in the Experimental Lakes Area, northwestern Ontario Preview this item
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External sex determination of lake trout (Salvelinus namaycush), white sucker (Catostomus commersoni) and lake whitefish (Coregonus clupeaformis) in the Experimental Lakes Area, northwestern Ontario

Author: L C Mohr; Canada. Department of Fisheries and Oceans. Western Region.
Publisher: Winnipeg, Man. : Western Region, Dept. of Fisheries and Oceans, [1982]
Series: Canadian technical report of fisheries and aquatic sciences, no. 1114.
Edition/Format:   Print book : National government publication : EnglishView all editions and formats
Summary:
Characteristics of the anal and urogenital openings were used to successfully determine the sex of female and male lake trout (Salvelinus namaycush), white sucker (Catostomus commersoni) and lake whitefish (Coregonus clupeaformis) from June to October 1981, at the Experimental Lakes Area, northwestern Ontario. Fish were sexed using a) external morphological features, and b) extracting sexual products with a syringe.  Read more...
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Material Type: Government publication, National government publication
Document Type: Book
All Authors / Contributors: L C Mohr; Canada. Department of Fisheries and Oceans. Western Region.
OCLC Number: 35373986
Language Note: Abstract in French and English.
Notes: "November 1982."
"This is the 148th Technical Report from the Western Region, Winnipeg."
"Cat. no. FS 97-6/1114"--Page ii.
Description: iv, 14 pages : illustrations ; 28 cm.
Series Title: Canadian technical report of fisheries and aquatic sciences, no. 1114.
Responsibility: by L.C. Mohr.

Abstract:

Characteristics of the anal and urogenital openings were used to successfully determine the sex of female and male lake trout (Salvelinus namaycush), white sucker (Catostomus commersoni) and lake whitefish (Coregonus clupeaformis) from June to October 1981, at the Experimental Lakes Area, northwestern Ontario. Fish were sexed using a) external morphological features, and b) extracting sexual products with a syringe. Dissections were used to confirm external sex determination. The success rate for the procedure was 92% (lake trout), 81% (white sucker), and 92% (lake whitefish). The sexing syringe did not always produce reproductive materials but was used successfully to test elasticity of the urogenital opening and penetrability of the urogenital tract. Distention or retraction of the anal and/or urogenital pores, formation of a genital papilla, coloration and accessibility of the urogenital pore were the most successful characteristics used in externally sexing the fish.

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Primary Entity

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