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Gizzard shad Dorosoma cepedianum often comprise a majority of the prey biomass in reservoir syste... more Gizzard shad Dorosoma cepedianum often comprise a majority of the prey biomass in reservoir systems. However, they rapidly grow to a size surpassing the preferred prey sizes of most piscivores. Therefore, even reservoirs with high gizzard shad abundance may be prey limited if age-0 abundance is low. Previous studies have not considered the effect of the prey supply of age-0 gizzard shad on the abundance, growth, or condition of the entire piscivore community in reservoirs. We used bioenergetics modeling and Monte Carlo simulations to quantify the abundance of age-0 gizzard shad necessary to sustain seven piscivore species at low, medium, and high (based on published values for each species) growth rates, population sizes, mortality rates, and proportions of gizzard shad in piscivore diets. Annual necessary gizzard shad abundance (accounting for non-predation mortality and reproductive surplus required for prey sustainability and scaled to August 15th) ranged from < 10·ha-1·pisciv...
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Fisheries Management and Ecology, 2014
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North American Journal of Fisheries Management, 2016
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North American Journal of Fisheries Management, 2015
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Gill nets are inherently size-specific due to the physics of how they capture fish. Size selectiv... more Gill nets are inherently size-specific due to the physics of how they capture fish. Size selectivity can affect several fisheries metrics, including length frequencies and size indices. To examine contact selectivity of the AFS standard gill net, we sampled white crappie, white bass, hybrid striped bass, saugeye, and channel catfish in five Oklahoma reservoirs and used the SELECT method to model five log-linear selectivity curves (normal, normal location, log normal, gamma, and bimodal). For all species, the bimodal model best fit the data and was used to adjust length frequencies and PSDs. The adjustments were typically minor for moderate-sized fish and strongest for small fish (i.e., compensated for low retention of small fish). Some species also required adjustments to compensate for low retention of large fish. Unadjusted and adjusted length frequencies were not significantly different for any species; however, adjusted PSD and PSD-P values differed from unadjusted values by >...
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Managers frequently invest considerable resources to establish native aquatic vegetation in aging... more Managers frequently invest considerable resources to establish native aquatic vegetation in aging reservoirs, typically with the goal of increasing recruitment of sport fishes (particularly largemouth bass). Submersed macrophytes provide structural complexity that produces a refuge and reduces predation mortality for some prey (i.e., bluegill). However, little is known about whether vegetation increases juvenile largemouth bass survival. Therefore, the objective of this study was to examine the effect of aquatic vegetation on survival of juvenile largemouth bass when exposed to predation. Aquatic vegetation was planted on one-half of a study tank at natural stem densities. A second tank, void of any structure, was used as a control. Videotaped behavioral trials were conducted with one adult largemouth bass and ten juvenile largemouth bass in the same tank. We quantified the time predators spent searching, orienting, and pursuing prey as well as the strike-to-capture ratio and the ti...
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… , and management of …, 2011
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Transactions of the American Fisheries Society, Sep 1, 2004
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Http Dx Doi Org 10 1577 T07 038 1, Jan 9, 2011
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[Visit Client Website ...
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North American Journal of Fisheries Management, Jan 9, 2011
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Http Dx Doi Org 10 1577 T08 159 1, Jan 9, 2011
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Http Dx Doi Org 10 1577 T04 073 1, Jan 9, 2011
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Hydrobiologia, 1997
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North American Journal of Fisheries Management, Jan 8, 2011
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Transactions of the American Fisheries Society, 2003
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Transactions of the American Fisheries Society, Sep 1, 2009
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Http Dx Doi Org 10 1577 T07 272 1, Jan 9, 2011
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Gizzard shad Dorosoma cepedianum often comprise a majority of the prey biomass in reservoir syste... more Gizzard shad Dorosoma cepedianum often comprise a majority of the prey biomass in reservoir systems. However, they rapidly grow to a size surpassing the preferred prey sizes of most piscivores. Therefore, even reservoirs with high gizzard shad abundance may be prey limited if age-0 abundance is low. Previous studies have not considered the effect of the prey supply of age-0 gizzard shad on the abundance, growth, or condition of the entire piscivore community in reservoirs. We used bioenergetics modeling and Monte Carlo simulations to quantify the abundance of age-0 gizzard shad necessary to sustain seven piscivore species at low, medium, and high (based on published values for each species) growth rates, population sizes, mortality rates, and proportions of gizzard shad in piscivore diets. Annual necessary gizzard shad abundance (accounting for non-predation mortality and reproductive surplus required for prey sustainability and scaled to August 15th) ranged from < 10·ha-1·pisciv...
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Fisheries Management and Ecology, 2014
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North American Journal of Fisheries Management, 2016
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North American Journal of Fisheries Management, 2015
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Gill nets are inherently size-specific due to the physics of how they capture fish. Size selectiv... more Gill nets are inherently size-specific due to the physics of how they capture fish. Size selectivity can affect several fisheries metrics, including length frequencies and size indices. To examine contact selectivity of the AFS standard gill net, we sampled white crappie, white bass, hybrid striped bass, saugeye, and channel catfish in five Oklahoma reservoirs and used the SELECT method to model five log-linear selectivity curves (normal, normal location, log normal, gamma, and bimodal). For all species, the bimodal model best fit the data and was used to adjust length frequencies and PSDs. The adjustments were typically minor for moderate-sized fish and strongest for small fish (i.e., compensated for low retention of small fish). Some species also required adjustments to compensate for low retention of large fish. Unadjusted and adjusted length frequencies were not significantly different for any species; however, adjusted PSD and PSD-P values differed from unadjusted values by >...
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Managers frequently invest considerable resources to establish native aquatic vegetation in aging... more Managers frequently invest considerable resources to establish native aquatic vegetation in aging reservoirs, typically with the goal of increasing recruitment of sport fishes (particularly largemouth bass). Submersed macrophytes provide structural complexity that produces a refuge and reduces predation mortality for some prey (i.e., bluegill). However, little is known about whether vegetation increases juvenile largemouth bass survival. Therefore, the objective of this study was to examine the effect of aquatic vegetation on survival of juvenile largemouth bass when exposed to predation. Aquatic vegetation was planted on one-half of a study tank at natural stem densities. A second tank, void of any structure, was used as a control. Videotaped behavioral trials were conducted with one adult largemouth bass and ten juvenile largemouth bass in the same tank. We quantified the time predators spent searching, orienting, and pursuing prey as well as the strike-to-capture ratio and the ti...
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… , and management of …, 2011
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Transactions of the American Fisheries Society, Sep 1, 2004
Bookmarks Related papers MentionsView impact
Http Dx Doi Org 10 1577 T07 038 1, Jan 9, 2011
Bookmarks Related papers MentionsView impact
[Visit Client Website ...
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North American Journal of Fisheries Management, Jan 9, 2011
Bookmarks Related papers MentionsView impact
Http Dx Doi Org 10 1577 T08 159 1, Jan 9, 2011
Bookmarks Related papers MentionsView impact
Http Dx Doi Org 10 1577 T04 073 1, Jan 9, 2011
Bookmarks Related papers MentionsView impact
Hydrobiologia, 1997
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North American Journal of Fisheries Management, Jan 8, 2011
Bookmarks Related papers MentionsView impact
Transactions of the American Fisheries Society, 2003
Bookmarks Related papers MentionsView impact
Transactions of the American Fisheries Society, Sep 1, 2009
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Http Dx Doi Org 10 1577 T07 272 1, Jan 9, 2011
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