Movement Ecology and Behavior

Binder, Thomas R.; Marsden, J. Ellen; Kornis, Matthew S.; Goetz, Frederick W.; Hellström, Gustav; Bronte, Charles R.; Gunn, John M.; Krueger, Charles C.

doi:10.1007/978-3-030-62259-6_7

Cited by 12 publications

(14 citation statements)

References 194 publications

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“…Although 37% of fish tagged in the eastern basin were tagged in Ontario waters during the spring, only three eastern basin‐tagged fish (2%) spent the majority of their time during fall along the north shore of the eastern basin. The tendency of eastern basin‐tagged fish to occupy the eastern south nearshore region during fall suggests that many of these fish were likely stocked in this region, as Lake Trout are known to return to natal rearing or stocking locations (reviewed by Binder et al 2021; Marsden et al 2021), even over long distances (Binder et al 2017; Riley et al 2018). Although some studies have found that the timing of spawning migrations is variable among years (Binder et al 2016; Marsden et al 2016), Lake Trout in the current study exhibited relatively consistent interannual nearshore movements.…”

Section: Discussionmentioning

confidence: 99%

“…The Lake Trout is a coldwater species that is physiologically constrained to temperatures less than 15°C and dissolved oxygen concentrations greater than 4 mgL −1 (Evans et al 1991), with a preference for temperatures less than 10°C and dissolved oxygen greater than 6 mgL −1 (Dillon et al 2003). Where abundant suitable oxythermal habitat is available, prey availability influences Lake Trout movement patterns and habitat selection (Binder et al 2021). Lake Trout typically spawn in late fall, although some spring-spawning populations exist (Bronte 1993).…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, recent studies suggest that Lake Trout may exhibit fidelity to particular areas during nonspawning periods (Morbey et al 2006; Binder et al 2017; Riley et al 2018). Experimental learning and memory may play a key role in repeated migration patterns of individuals (Binder et al 2021). Long‐distance dispersal (>100 km) has been noted in some Great Lakes populations (Schmalz et al 2002; Kapuscinski et al 2005; Riley et al 2018; Ivanova et al 2021) but is seemingly rare, as most studies have found that most Lake Trout disperse less than 100 km from tagging sites (Schmalz et al 2002; Kapuscinski et al 2005; Bronte et al 2007; Riley et al 2018).…”

Section: Introductionmentioning

confidence: 99%

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Seasonal spatial ecology of Lake Trout in Lake Erie

Funnell,

Brenden,

Kraus

et al. 2023

Trans Am Fish Soc

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ObjectiveLake Trout Salvelinus namaycush are native coldwater apex predators that play an important role in maintaining ecosystem functionality and diversity in the Laurentian Great Lakes. Following population collapses, rehabilitation efforts were widely initiated in the Great Lakes to reestablish self‐sustaining Lake Trout populations. Lake Erie may pose a challenge to these rehabilitation efforts due to limited availability of appropriate oxythermal habitat. Our goal was to investigate seasonal habitat use of adult Lake Trout in Lake Erie to inform management and rehabilitation efforts.MethodsWe used acoustic telemetry in Lake Erie, which was equiped with a lake‐wide acoustic receiver grid, to quantify Lake Trout seasonal region occupancy, dispersal distances, bottom depth occupancy, space use extent, and space use overlap.ResultWe found that 32% of fish tagged in the eastern basin and all fish from the western basin dispersed more than 100 km from their tagging location, which represents a greater proportion of the population moving long distances than what has been previously documented in the Great Lakes. During stratification, Lake Trout were detected almost exclusively in the offshore eastern basin in areas where water depth exceeded 25 m. During nonstratified seasons, fish used other regions of the lake, occupying areas of highly variable depths. During fall, most fish tagged in the eastern basin occupied habitat along the southern shore of the eastern basin. Fish tagged in the western basin returned to this region in the fall of subsequent years despite occupying the offshore eastern basin during stratification and having depth occupancy, home range size, and overlap similar to that of eastern basin‐tagged fish. Fish size was positively correlated with receiver depth during winter and spring, and with home range overlap during spring and summer.ConclusionThe results of this study can begin to inform management decisions regarding stocking locations, harvest regulations, and habitat restoration to facilitate the continued rehabilitation of this important native species.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Seasonal spatial ecology of Lake Trout in Lake Erie

Funnell,

Brenden,

Kraus

et al. 2023

Trans Am Fish Soc

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“…Increased lipid in deep‐water lake charr ecotypes may make it easier for siscowet to regulate buoyancy without extensive gas exchange while undergoing large, and rapid changes of depth that are not frequently exhibited by lean lake charr (Eshenroder & Burnham‐Curtis, 1999; Henderson & Anderson, 2002). These vertical movements are probably involved in foraging and are extreme requiring fish to move hundreds of meters to the surface and then back again frequently within periods of 15–30 min (Binder et al, 2021; Jasonowicz et al, 2022; Stockwell et al, 2010). Repeatedly inflating and deflating a swim bladder during vertical movements would be metabolically taxing, and swim bladders may go unused when siscowet are in their primary habitat on the lake bottom (Goetz personal observation; McCune & Carlson, 2004).…”

Section: Discussionmentioning

confidence: 99%

Further evidence from common garden rearing experiments of heritable traits separating lean and siscowet lake charr (Salvelinus namaycush) ecotypes

et al. 2022

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Genetic evidence of selection for complex and polygenically regulated phenotypes can easily become masked by neutral population genetic structure and phenotypic plasticity. Without direct evidence of genotype-phenotype associations it can be difficult to conclude to what degree a phenotype is heritable or a product of environment. Common garden laboratory studies control for environmental stochasticity and help to determine the mechanism that regulate traits. Here we assess lipid content, growth, weight, and length variation in full and hybrid F 1 crosses of deep and shallow water sympatric lake charr ecotypes reared for nine years in a common garden experiment. Redundancy analysis (RDA) and quantitative-trait-loci (QTL) genomic scans are used to identify associations between genotypes at 19,714 single nucleotide polymorphisms (SNPs) aligned to the lake charr genome and individual phenotypes to determine the role that genetic inheritance plays in ecotype phenotypic diversity. Lipid content, growth, length, and weight differed significantly among lake charr crosses throughout the experiment suggesting that pedigree plays a large roll in lake charr development. Polygenic scores of 15 SNPs putatively associated with lipid content and/or condition factor indicated that ecotype distinguishing traits are polygenically regulated and additive. A QTL identified on chromosome 38 contained >200 genes, some of which were associated with lipid metabolism and growth, demonstrating the complex nature of ecotype diversity. The results of our common garden study further indicate that lake charr ecotypes observed in nature are predetermined at birth and that ecotypes differ fundamentally in lipid metabolism and growth.

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“…Tagging efforts were focused on mature male Lake Trout because they are known to stay at spawning sites longer than females, thereby allowing for a more accurate and precise description of spawning sites (Martin and Olver 1980; Binder et al. 2021).…”

Section: Methodsmentioning

confidence: 99%

Combination of Acoustic Telemetry and Side‐Scan Sonar Advances Suppression Efforts for Invasive Lake Trout in a Submontane Lake

Siemiantkowski

Guy

Koel

et al. 2022

N American J Fish Manag

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Expansion of an invasive Lake Trout Salvelinus namaycush population in Swan Lake, Montana, threatens a core area population of Bull Trout S. confluentus. Given the recent development of novel suppression methods, such as use of carcass analog pellets to cause high mortality of embryos, there was a need to quantify spawning season aggregation sites, site use, and spawning habitat for Lake Trout in Swan Lake. Acoustic tags were implanted in 85 Lake Trout during the summer in 2018 and 2019. Nightly tracking efforts during autumn in both years resulted in 1,744 relocations for 49 individual Lake Trout. Kernel density analysis was used to evaluate Lake Trout aggregation sites, identifying 10 distinct sites. All spawning sites were located in the littoral zone along areas of steep bathymetric relief, and these sites composed 48% of total relocations during both spawning seasons. In 2019, side‐scan sonar imaging was used to classify and quantify the total area of spawning substrate, which constituted 12.8% of the total surface area estimated for spawning sites 1, 6, and 9 and 11.4% of the total surface area for aggregation sites 2–5, 7, 8, and 10. Simultaneous treatment of all spawning sites would require 205,709 ± 86 kg of carcass analog pellet material, resulting in 370.4 ± 0.2 kg of phosphorus inputs and 7,487.9 ± 3.1 kg of nitrogen inputs to Swan Lake. Thus, pellet treatment would increase the Carlson's trophic state index (TSI) values from 20.8 to 27.7 for total phosphorus and from 22.1 to 26.2 for total nitrogen. Based on a TSI threshold of less than 40 for an oligotrophic lake, the use of carcass analog pellets could be feasible for supplementing the gill‐netting suppression of Lake Trout in Swan Lake.

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Movement Ecology and Behavior

Cited by 12 publications

References 194 publications

Seasonal spatial ecology of Lake Trout in Lake Erie

Seasonal spatial ecology of Lake Trout in Lake Erie

Further evidence from common garden rearing experiments of heritable traits separating lean and siscowet lake charr (Salvelinus namaycush) ecotypes

Combination of Acoustic Telemetry and Side‐Scan Sonar Advances Suppression Efforts for Invasive Lake Trout in a Submontane Lake

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