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dc.creatorWahl, David H.
dc.creatorStein, Roy A.
dc.identifier.citationWahl, David H.; Stein, Roy A. "Comparative Vulnerability of Three Esocids to Largemouth Bass (Micropterus salmoides) predation," Canadian Journal of Fisheries and Aquatic Sciences, v. 46, no. 12, 1989, pp. 2095-2103.en_US
dc.identifier.issn0706-652X (print)
dc.description.abstractWe compared vulnerability among tiger muskellunge (Esox masquinongy x E. lucius) (TM), northern pike (E. lucius) (NP), and muskellunge (E. masquinongy) (M) to predation by largemouth bass (Micropterus salmoides). Equal numbers (about 25/ha) and sizes (either 145, 180, or 205 mm) of each esocid taxa were stocked into three reservoirs (40-89 ha) during 3 yr (five stockings total). Tiger muskellunge were significantly more susceptible to predation (x = 30%, range 1-53% mortality) than muskellunge (x = 12%, range 2-26%); northern pike were intermediate in susceptibility (x = 19%, range 2-35%). Esocid size influenced predation rates for all taxa; losses to predation by largemouth bass decreased from an average of 31% at 145 mm to 2% at 205 mm. Pond experiments (N = 7) provided results similar to reservoirs: TM > NP > M. In laboratory pools with simulated vegetation (N = 106 experiments), susceptibility to predation among esocids did not differ. Dispersal rates by esocids were similar in reservoirs and all taxa preferred vegetated habitats. However, differential habitat selection may partially explain why tiger muskellunge are more vulnerable to largemouth bass predation, as they spent more time in open than vegetated habitats in both pond and pool experiments than either of the parent species. For all taxa, stocking lengths ≥205 mm in fall will increase survival by reducing predatory losses.en_US
dc.description.sponsorshipFunding for this project was provided by the Federal Aid in Fish Restoration Act under Project F-57-R.en_US
dc.subjectesocid survivalen_US
dc.subjectlargemouth bass predation susceptibilityen_US
dc.subjectcomparison of pond and reservoir experimentsen_US
dc.titleComparative Vulnerability of Three Esocids to Largemouth Bass (Micropterus salmoides) predationen_US

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