Habitat selection by adult walleye during spawning season in irrigation reservoirs: a patch occupancy modeling approach

Martin, Dustin R.; Powell, Larkin A.; Pope, Kevin L.

doi:10.1007/s10641-011-9952-6

Cited by 9 publications

(3 citation statements)

References 20 publications

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“…This loosely served as a proxy for photoperiod and prevailing climate patterns and has been previously related to Walleye spawning behavior (Schneider et al 2010). Mean daily reservoir elevation was recorded each day during the broodstock collection as meters above mean sea level (U.S. Geological Survey gauge 06914995) and served as a measurement of spawning habitat availability (inundated riprap reinforced dam face; Martin et al 2012). Water temperature (°C) has been associated with Walleye spawning behavior and was measured at the site daily 0.5 m beneath the surface at sunrise (Hokanson 1977).…”

Section: Model Parametersmentioning

confidence: 99%

Influence of Environmental Variables on Catch of Walleye Broodfish for Propagation Efforts

2023

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Walleye Stizostedion vitreum support recreational fisheries throughout their range but increasingly require annual stockings to maintain populations. In many areas of their distribution, Walleye broodfish are collected annually and manually spawned onsite before fertilized eggs are transported to fish culture facilities for rearing. As such, efficiency of these programs is reliant on effective capture of broodfish. Generalized additive models were used to explain the influence of eight environmental factors on catch per effort (CPE) of ripe female Walleye and male Walleye during brood collection events from Hillsdale Reservoir, Kansas, using data from 2009 to 2021 (excluding 2020). The ripe female model explained 63% of the deviance in CPE and identified the day of year, water temperature, moon illumination, previous autumn CPE of preferred‐length fish (CPEp), and previous autumn proportional size distribution of preferred‐length fish (PSDp) as influential variables. The male model explained 64% of the deviance in CPE and identified the day of year, change in barometric pressure from the previous day, water temperature, and previous autumn proportional size distribution of quality‐length fish PSDq as influential variables. These findings provide useful information regarding collection of Walleye broodfish and can be leveraged to increase efficiency of future operations range‐wide.

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Section: Model Parametersmentioning

confidence: 99%

Influence of Environmental Variables on Catch of Walleye Broodfish for Propagation Efforts

2023

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“…We set two to three 100 m by 1.8 m monofi lament gillnets with 7.6 cm bar mesh at approximately sunset in ~2 m of water in close proximity to the dam at each reservoir, the primary spawning site (Martin et al 2011), and retrieved nets aft er approximately a one-hour deployment. We measured water temperature at a depth of 1 m at the start of every net deployment.…”

Section: Study Site and Data Collectionmentioning

confidence: 99%

Masked Expression of Life-History Traits in a Highly Variable Environment

DeBoer¹,

Fontaine²,

Chizinski³

et al. 2015

gpr

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Differing life-history strategies may act as a constraint on reproductive expression that ultimately limits the ability of individual species to respond to changes in the magnitude or frequency of environmental variation, and potentially underlies the variation often inherent in phenotypic and evolved responses to anthropogenic change. Alternatively, if there are environmental cues that predict reproductive potential, differential expression of life-history strategies may represent differences in the adaptive capacity to optimize current reproductive value given variation in environmental conditions. We compared several aspects of walleye Sander vitreus spawning ecology at two reservoirs that differ in environmental variability (i.e., annual water-level fluctuation) to identify the capacity of phenotypic expression and the corresponding association with age. Despite significant differences in female body and liver masses between reservoirs that differ in environmental variability, we found no difference in reproductive investment measured by egg size and fecundity. Walleye in a highly variable environment appear to exhibit reproductive traits more typical of a short-lived life-history strategy, which may be resultant from the interaction of environmental and anthropogenic pressures. This finding emphasizes the need to identify the degree to which life-history expression represents physiological constraints versus ecological optimization, particularly as anthropogenic change continues to alter environmental conditions.

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“…We also quantified egg deposition, egg viability, and larval out-migration between the sites, with the natural site considered indicative of baseline or reference conditions. We hypothesized that the created riffle (i.e., enhancement site) would be used for spawning (Kelder and Farrell 2009;Martin et al 2012) and that eggs would successfully incubate and hatch leading to larval out-migration (Crane and Farrell 2013). Results from the enhancement project in Kent's Creek will provide a basis for recommendations of future habitat improvement projects and guide rehabilitation and restoration initiatives of degraded spawning habitats for Walleyes.…”

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confidence: 99%

Increased Walleye Egg‐to‐Larvae Survival following Spawning Habitat Enhancement in a Tributary of Eastern Lake Ontario

Leblanc

Brown

Farrell

2017

N American J Fish Manag

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To mitigate the effects of sedimentation from surrounding land use, a Newbury weir was installed in Kent's Creek (a tributary of eastern Lake Ontario) by the U.S. Fish and Wildlife Service Partners for Fish and Wildlife Program to enhance spawning habitat for Walleye Sander vitreus. By adding angular crushed limestone, the Newbury weir was designed as an engineered spawning riffle that creates a scouring effect to maintain clean spawning substrate for Walleyes. To evaluate the success of the Newbury weir, we compared rates of egg deposition, egg viability, and larval out‐migration between the created spawning riffle and a natural spawning bed for two seasons subsequent to its construction. Spawning Walleyes were found to immediately spawn on the created riffle following construction and demonstrated similar patterns of egg deposition and larval out‐migration at both sites each year. When data were pooled between years, significantly higher densities of out‐migrating larvae were observed at the Newbury weir despite the finding that significantly more eggs were spawned at the natural site. Considering that egg viability was similar between sites, we deduce that the created riffle had a higher egg‐to‐larvae survival rate. Our results suggest that the Newbury weir successfully created functional spawning habitat promoting out‐migrating larval Walleyes. We anticipate that the created riffle will maintain valuable spawning substrate for Walleyes, but sediments deposited from upstream eroding banks and agricultural land use practices could affect its long‐term viability. We recommend that future spawning habitat enhancement projects adopt similar approaches within appropriate fluvial geomorphic settings and additionally consider watershed‐scale improvements to enhance Walleye spawning tributaries. Received March 17, 2017; accepted May 26, 2017 Published online August 9, 2017

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Habitat selection by adult walleye during spawning season in irrigation reservoirs: a patch occupancy modeling approach

Cited by 9 publications

References 20 publications

Influence of Environmental Variables on Catch of Walleye Broodfish for Propagation Efforts

Influence of Environmental Variables on Catch of Walleye Broodfish for Propagation Efforts

Masked Expression of Life-History Traits in a Highly Variable Environment

Increased Walleye Egg‐to‐Larvae Survival following Spawning Habitat Enhancement in a Tributary of Eastern Lake Ontario

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