Presentation on theme: "1 How Well Does a Closed Season Protect Spawning Bass in Ontario? Mark Kubacki, Frank Phelan, Julie Claussen and David Philipp American Fisheries Society."— Presentation transcript:
1 How Well Does a Closed Season Protect Spawning Bass in Ontario? Mark Kubacki, Frank Phelan, Julie Claussen and David Philipp American Fisheries Society Symposium (2002) Chris Carman
2 Spawning Overview Largemouth and smallmouth bass Temperatures near 15° C. Males guard nests and fry Are extremely aggressive
3 Self-sustaining populations Closed fishing periods Catch and release regulations Length/harvest limit combinations
4 Ontario Regulations Closed season from Oct. 15/Nov. 30 – last Saturday in June Eliminate harvest of male bass Maximize reproductive success
5 Major Questions How well does the closed season coincide with the full reproductive period? What percent of angling effort targets nesting bass during the closed season?
6 Ontario Study Areas Lake Opinicon Charleston Lake Mississippi River (tributary of the Ottawa River) St. Lawrence River
7 Methods Monitored reproductive effort Twice on weekdays, once on weekends 1990 - 2001 Assessed angling effort Twice on weekdays, once on weekends 1990 - 1992
8 Major Findings Smallmouths guard broods longer than largemouths –SMB 18 ~ 31 days –LMB 12 ~ 23 days Fry develop and become independent quicker in waters that warm quickly
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