Oxythermal habitat as a primary driver of ecological niche and genetic diversity in cisco (<i>Coregonus artedi</i>)

Grow, Ryan C.; Zimmer, Kyle D.; Cruise, Jennifer L.; Emms, Simon K.; Miller, Loren M.; Herwig, Brian R.; Staples, David F.; Tipp, Angela R.; Gerdes, Greta M; Jacobson, Peter C.

doi:10.1139/cjfas-2021-0059

Cited by 7 publications

(3 citation statements)

References 64 publications

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“…and Beamish 1993) and can be an important determinant in their carbon isotopic signatures (Grow et al 2022). As reductions in zooplankton biomass (Yan et al 2002;Barbiero and Tuchman 2004;Kerfoot et al 2016) and production (Strecker and Arnott 2008) are commonly reported responses to Bythotrephes invasion, a shift in resource use for these typically pelagic feeding shes to alternative energy sources is not entirely unexpected.…”

Section: Discussionmentioning

confidence: 99%

Spiny water flea invasion alters fish mercury bioaccumulation rates

Rennie,

James,

Arnott

et al. 2024

Biol Invasions

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Bythotrephes cederströemi have invaded numerous inland lakes in North America, many of which are strati ed and support offshore shes like the Cisco (Coregonus artedi). While evaluations based on changes in zooplankton community composition following Bythotrephes invasion predict an increase in Cisco mercury concentrations, this phenomenon was not detected from a survey evaluating temporal changes in Cisco Hg across a broad range of lakes varying in the presence or absence of Bythotrephes. Here, we compare temporal changes in Cisco biomagni cation factor slopes (i.e., slopes of relationships between Cisco Hg and δ 15 N isotopes) from lakes experiencing Bythotrephes invasion over the study period to those already invaded (as a reference) over similar time periods. Our results show that biomagni cation slopes after Bythotrephes invasion either changed direction entirely (from positive to negative relationships) or decreased in elevation relative to those prior to invasion. No such pattern was observed in previously invaded reference lakes. Reductions in Cisco biomagni cation slopes and/or intercepts following Bythotrephes invasion suggest that conversion e ciency (and therefore growth) of Cisco increased after invasion (i.e., less Hg accumulates in sh at an equivalent trophic position after vs. before invasion). Back-calculated Cisco growth rates and size-at-age were greater in the presence of Bythotrephes than without, further supporting the hypothesis that changes in Hg biomagni cation are likely due to increased conversion e ciency. These ndings highlight the potential importance of foraging energetics over and above shifts in trophic position in modifying sh contaminant concentrations.

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Section: Discussionmentioning

confidence: 99%

Spiny water flea invasion alters fish mercury bioaccumulation rates

Rennie,

James,

Arnott

et al. 2024

Biol Invasions

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“…Optimal and usable DO thresholds for lake whitefish have not been as well defined as for other closely related coldwater species, such as lake trout. A generalized threshold of 3 mg L −1 has been suggested for coldwater fishes by Jacobson et al ( 2010 ) and has subsequently been used in several oxythermal habitat assessments for coregonids (e.g., Magee et al 2019 ; Grow et al 2022 ). Here, we used the slightly higher threshold of 4 mg L −1 for optimal oxygen habitat, which corresponds to the lower bound of optimal oxygen habitat for adult lake trout in nearby lakes at IISD-ELA (Plumb and Blanchfield 2009 ).…”

Section: Methodsmentioning

confidence: 99%

Behavioural responses of a cold-water benthivore to loss of oxythermal habitat

et al. 2022

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Climate-driven declines in oxythermal habitat in freshwater lakes can impose prolonged constraints on cold-water fishes sensitive to hypoxia. How fish cope with severe habitat limitations is not well understood, yet has implications for their persistence. Here, we use acoustic-positioning telemetry to assess seasonal habitat occupancy and activity patterns of lake whitefish (Coregonus clupeaformis), a cold-water benthivore, in a small boreal lake that regularly faces severe oxythermal constraints during summer stratification. During this stratified period, they rarely (< 15% of detections) occupied depths with water temperatures > 10 °C (interquartile range = 5.3–7.9 °C), which resulted in extensive use (> 90% of detections) of water with < 4 mg L−1 dissolved oxygen (DO; interquartile range = 0.3–5.3 mg L−1). Lake whitefish were least active in winter and spring, but much more active in summer, when only a small portion of the lake (1–10%) contained optimal oxythermal habitat (< 10 °C and > 4 mg L−1 DO), showing frequent vertical forays into low DO environments concurrent with extensive lateral movement (7649 m d−1). High rates of lateral movement (8392 m d−1) persisted in the complete absence of optimal oxythermal habitat, but without high rates of vertical forays. We found evidence that lake whitefish are more tolerant of hypoxia (< 2 mg L−1) than previously understood, with some individuals routinely occupying hypoxic habitat in winter (up to 93% of detections) despite the availability of higher DO habitat. The changes in movement patterns across the gradient of habitat availability indicate that the behavioural responses of lake whitefish to unfavourable conditions may lead to changes in foraging efficiency and exposure to physiological stress, with detrimental effects on their persistence.

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“…Temperature is considered one of the most important factors for habitat selection in fish, as body temperature in most fish is governed by the surrounding water temperature. Water temperature also affects oxygen levels (Grow et al 2022), which is another key determinant for fish metabolism. Fish are sensitive to temperature differences and can detect variations in temperature smaller than 0.1° C (Hoar and Randall 1979).…”

Section: Introductionmentioning

confidence: 99%

Seasonal variation in thermal habitat volume for cold-water fish populations : implications for hydroacoustic survey design and stock assessment

Axenrot¹,

Degerman²,

Asp³

2023

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For accurate stock assessment, survey design must consider fish behavior and ecology. Yearlings and older individuals of the commercially exploited cold-water species vendace (Coregonus albula) are found below the metalimnion through periods of thermal stratification. These stratification periods generally last for 3-4 months, from the middle of summer to early autumn. In lakes with heterogeneous distribution of depths, the habitat volume for vendace vary drastically within and across years, which affects the distribution and population densities. Variable thermal habitat volumes, with food and oxygen depletion in the hypolimnion through the period of stratification, may act as a population size-regulating factor. Using hydroacoustics in combination with trawl data and temperature profiles, we examined the distribution of vendace through annual periods of thermal stratification. We found that yearling and older vendace these periods were confined to cold-water habitat volumes representing less than 10 % of the total water volume of Lake Mälaren, the third largest lake in Sweden. By introducing stratification to the design of hydroacoustic surveys supported by midwater trawling, seasonal aggregations of fish in temporally restricted thermal habitat volumes can be used to lower survey effort and improve the precision in estimates of population size. Temporally restricted habitat volumes may induce risks for the populations to over-fishing and sensitivity to environmental changes that potentially may call for directed management.

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Oxythermal habitat as a primary driver of ecological niche and genetic diversity in cisco (Coregonus artedi)

Cited by 7 publications

References 64 publications

Spiny water flea invasion alters fish mercury bioaccumulation rates

Spiny water flea invasion alters fish mercury bioaccumulation rates

Behavioural responses of a cold-water benthivore to loss of oxythermal habitat

Seasonal variation in thermal habitat volume for cold-water fish populations : implications for hydroacoustic survey design and stock assessment

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