Diet Patterns and Niche Overlap of Muskellunge and Co‐Occurring Piscivores in Minnesota Lakes

Glade, Kamden C.; Herwig, Brian R.; Ahrenstorff, Tyler D.; Reed, Jeffrey R.; Hafs, Andrew W.

doi:10.1002/nafm.10880

Cited by 5 publications

(4 citation statements)

References 141 publications

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“…Finally, during the 10-min mirror phase of the behavioral assay, the behavioral software was again used to quantify all of the behaviors described above in addition to the total number of mirror "displays" performed by each fish. In this study, a display was deemed to have occurred when a fish approached within one body length of the mirror and displayed its fins while exposing its full side to the mirror (Swain and Holtby 1989;Gonçalves-de-Freitas and Mariguela 2006;Way et al 2015).…”

Section: Methodsmentioning

confidence: 99%

“…The Muskellunge Esox masquinongy is an apex predator in the systems it occupies, with adult fish filling an important niche by consuming large prey items and facilitating top-down control of ecosystems (Glade 2021). Muskellunge are also popular with anglers (Fayram 2003) and are long-lived fish, with some individuals attaining ages upwards of 30 years (Casselman and Crossman 1986).…”

mentioning

confidence: 99%

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Capture Is Predicted by Behavior and Size, Not Metabolism, in Muskellunge

Bieber

Louison

Suski

2023

N American J Fish Manag

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Fish that strike angling lures often have a set of characteristics that predispose them to capture. Vulnerable fish may then be removed from a population, either through harvest or incidental mortality, and in turn leave individuals in a population that are less vulnerable to angling. Over time, the removal of vulnerable individuals can erode capture rates, possibly resulting in evolutionary changes if traits that result in capture correlate with characteristics such as fecundity or growth. We sought to define the mechanisms driving individual angling vulnerability in Muskellunge Esox masquinongy, with the intent of informing management activities to conserve populations. The behavior of individually identified Muskellunge (n = 68; mean TL = 310.2 mm; range = 229–350 mm) was assessed using standard open‐field tests; the fish were then stocked into earthen‐bottom ponds to assess angling vulnerability. After angling, all captured fish and a subset of uncaptured fish were assessed for metabolic parameters. Results indicated that larger Muskellunge displaying low levels of exploration and aggression were preferentially captured. Behaviors such as boldness and activity did not influence capture, and metabolic parameters did not differ between captured and uncaptured fish.

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Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

Capture Is Predicted by Behavior and Size, Not Metabolism, in Muskellunge

Bieber

Louison

Suski

2023

N American J Fish Manag

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“…Multiple gears were used due to differences in physical habitat that led to limited success with gill nets in the wetland and electrofishing in the lake. Differences in gear selectivity are not expected to substantially impact diet sampling (Glade et al 2023;Pothoven et al 2017;Quist et al 2002;Selch et al 2019). Collected Walleye were euthanized via carbon dioxide-induced hypoxia and measured for total length (mm) and weight (g).…”

Section: Walleye Dietsmentioning

confidence: 99%

Importance of a Lake-Wetland Complex for a Resilient Walleye Fishery

Cutler,

Chipps,

Blackwell

et al. 2024

Wetlands

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Wetlands serve as unique habitats that can support high biodiversity. Large-scale loss of wetland habitats can threaten important linkages between lake and wetland habitats that could affect diversity and growth of aquatic organisms. In this study, we compare prey diversity and abundance as well as Walleye (Sander vitreus) diets and condition in a large glacial lake (Lake Kampeska, South Dakota) with a connected wetland to better understand seasonal changes in the benefits provided by each habitat. We examined seasonal differences (spring, summer, and fall) through two years (summer 2021 through fall 2022) between the habitats using prey fish catch per unit effort, richness, Shannon diversity, and Bray–Curtis dissimilarity as well as Walleye relative weight, percent of empty stomachs, diet weight, stomach fullness, diet energy, and diet taxa importance. The prey fish community was more diverse and abundant in the wetland, and Walleye consumed more prey (by weight) in the wetland during all seasons except spring. Wetland reconnection can be a tool for managers to improve water quality while providing seasonal habitat needs for fish. Additionally, the diversity of prey resources provided by wetlands, many of which are unique, support resilience in the face of ecological change. Protection of wetlands may be critical for maintaining healthy and resilient fisheries into the future.

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“…One of the most iconic and popular freshwater fish in North America is the muskellunge ( Esox masquinongy ; Fayram, 2003; Glade, 2021). This top predator occupies lakes and streams in North America and is a target for anglers year‐round (Fayram, 2003).…”

Section: Introductionmentioning

confidence: 99%

Food availability influences angling vulnerability in muskellunge

Bieber,

MacDougall‐Shackleton,

Suski

2023

Fisheries Management Eco

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Reduced food availability increases the capture of several fish species, although the mechanisms responsible for how food resources result in increased capture are undefined. Our objective was to quantify the mechanism by which food availability might influence the angling vulnerability of muskellunge (Esox masquinongy). We assessed capture rates in the field under different food levels, quantified the behaviors of muskellunge that were either fed or food deprived, and determined if appetite‐related hormones leptin and ghrelin affected fish behavior. Catch rates of fasted muskellunge were more than twice as high as those of fed muskellunge. However, food deprivation and hormonal treatments did not influence laboratory behavior, which suggested that catch rates of food‐deprived muskellunge increased because fish were more receptive to lures. Furthermore, an ecosystem approach should be used to consider forage as a component of management goals.

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Diet Patterns and Niche Overlap of Muskellunge and Co‐Occurring Piscivores in Minnesota Lakes

Cited by 5 publications

References 141 publications

Capture Is Predicted by Behavior and Size, Not Metabolism, in Muskellunge

Capture Is Predicted by Behavior and Size, Not Metabolism, in Muskellunge

Importance of a Lake-Wetland Complex for a Resilient Walleye Fishery

Food availability influences angling vulnerability in muskellunge

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