Biology and Exploitation of Paddlefish in the Missouri River below Gavins Point Dam

Rosen, Rudolph A.; Hales, Donald C.; Unkenholz, Dennis G.

doi:10.1577/1548-8659(1982)111<216:baeopi>2.0.co;2

Cited by 48 publications

(38 citation statements)

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“…Additionally, sexual dimorphism has been documented in Paddlefish populations (Rosen et al. ; Scarnecchia et al. ) and must be considered when interpreting these results.…”

Section: Discussionmentioning

confidence: 99%

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Quantitative Evaluation of Paddlefish Sport Fisheries in Missouri's Large Reservoirs: Implications for the Management of Trophy Sport Fisheries

Hupfeld

Phelps

Tripp

et al. 2018

N American J Fish Manag

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Lake of the Ozarks, Harry S. Truman Reservoir, and Table Rock Lake in Missouri contain important recreational fisheries for trophy Paddlefish Polyodon spathula. These three reservoirs were created by damming major rivers. Because of river modifications, Paddlefish natural reproduction is thought to be limited; subsequently, populations have been maintained through supplementation and harvest regulations. However, these fisheries have not been thoroughly assessed, and the applicability of management actions (e.g., supplementation and minimum length limits) has not been fully evaluated. Population simulations indicated that changes in the amount of trophy‐sized Paddlefish and broodstock remaining were similar among the three reservoirs, with larger minimum length limits resulting in a greater proportion of mature and trophy‐sized individuals. However, the number of Paddlefish that could be harvested at Harry S. Truman Reservoir and Lake of the Ozarks was much greater than at Table Rock Lake. These disparities are likely attributable to the amount of supplementation occurring at each reservoir. Based on unmarked fish from each reservoir, the percentage of sampled fish that were considered wild suggested that natural reproduction is occurring in Lake of the Ozarks (51.5%), Harry S. Truman Reservoir (83.9%), and Table Rock Lake (13.7%). Considering the Missouri Department of Conservation's desired management goals for maintaining trophy fisheries, a minimum length limit of at least 864 mm is suggested. If supplementation, natural reproduction, and harvest regulations are inadequate, reductions in Paddlefish abundance, size structure, harvest, and popularity could occur. One motivator for anglers to participate in trophy fisheries is the opportunity to catch a rare, unique, and large fish. Declines in a trophy fishery could cause economic losses to local areas and state agencies; thus, having an adaptive management plan in place to manage trophy fisheries is imperative.

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“…Additionally, sexual dimorphism has been documented in Paddlefish populations (Rosen et al. ; Scarnecchia et al. ) and must be considered when interpreting these results.…”

Section: Discussionmentioning

confidence: 99%

“…Additionally, Rosen et al. () determined that females were longer and heavier than males of similar ages, but the length–weight relationship did not differ. Instantaneous mortality was estimated as the slope of the descending limb of the catch curve.…”

Section: Methodsmentioning

confidence: 99%

Quantitative Evaluation of Paddlefish Sport Fisheries in Missouri's Large Reservoirs: Implications for the Management of Trophy Sport Fisheries

Hupfeld

Phelps

Tripp

et al. 2018

N American J Fish Manag

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show abstract

“…of reduced current velocity below sandbars, likely allowing them to maintain their position in a lower velocity environment while feeding on drift (Rosen et al 1982).…”

Section: Fish Communitymentioning

confidence: 99%

Developing a shared understanding of the Upper Mississippi River: the foundation of an ecological resilience assessment

Bouska¹,

Houser²,

Jager³

et al. 2018

E&S

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. 2018. Developing a shared understanding of the Upper Mississippi River: the foundation of an ecological resilience assessment. Ecology and Society 23 (2) ABSTRACT. The Upper Mississippi River System (UMRS) is a large and complex floodplain river ecosystem that spans the jurisdictions of multiple state and federal agencies. In support of ongoing ecosystem restoration and management by this broad partnership, we are undertaking a resilience assessment of the UMRS. We describe the UMRS in the context of an ecological resilience assessment. Our description articulates the temporal and spatial extent of our assessment of the UMRS, the relevant historical context, the valued services provided by the system, and the fundamental controlling variables that determine its structure and function. An important objective of developing the system description was to determine the simplest, adequate conceptual understanding of the UMRS. We conceptualize a simplified UMRS as three interconnected subsystems: lotic channels, lentic off-channel areas, and floodplains. By identifying controlling variables within each subsystem, we have developed a shared understanding of the basic structure and function of the UMRS, which will serve as the basis for ongoing quantitative evaluations of factors that likely contribute to the resilience of the UMRS. As we undertake the subsequent elements of a resilience assessment, we anticipate our improved understanding of interactions, feedbacks, and critical thresholds will assist natural resource managers to better recognize the system's ability to adapt to existing and new stresses.

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“…Present results raise the possibility that these large metal gates produce electrical signatures that inhibit paddlefish migrations through the locks and dams. Field research has shown that paddlefish tend to congregate below these structures (Rosen et al, 1982;Southall & Hubert, 1984;Russell, 1986;Graham, 1988;Moen et al, 1992). Southall &    Hubert (1984) also found that paddlefish are unwilling to pass upstream until the water control structures have been opened completely, and the gates have been raised out of the water.…”

Section: Do Avoidance Responses Influence Migratory Behaviour?mentioning

confidence: 99%

Electrosensory avoidance of metal obstacles by the paddlefish

Gurgens

Russell

Wlikens

2000

Journal of Fish Biology

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Paddlefish Polyodon spathula detected and avoided obstacles with an exposed metallic surface but not plastic objects. An aluminium obstacle was avoided from significantly greater minimum approach distances than were any of the other obstacles. No significant difference was detected between the plastic and plastic-covered aluminium obstacles, while control values were significantly less than for all obstacle types. Avoidance distances measured at different water conductivities were not significantly different. Fish collided frequently with the plastic and plastic-covered aluminium obstacles, and with the control site, suggesting that these obstacles were not detected by the electrosensory apparatus. The aluminium obstacle was avoided successfully in all test runs. The unambiguous avoidance behaviour elicited by the aluminium obstacle suggests that large metallic structures, such as locks and dams, have the potential to interfere with paddlefish migrations. 2000 The Fisheries Society of the British Isles

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Biology and Exploitation of Paddlefish in the Missouri River below Gavins Point Dam

Cited by 48 publications

References 0 publications

Quantitative Evaluation of Paddlefish Sport Fisheries in Missouri's Large Reservoirs: Implications for the Management of Trophy Sport Fisheries

Quantitative Evaluation of Paddlefish Sport Fisheries in Missouri's Large Reservoirs: Implications for the Management of Trophy Sport Fisheries

Developing a shared understanding of the Upper Mississippi River: the foundation of an ecological resilience assessment

Electrosensory avoidance of metal obstacles by the paddlefish

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