Seasonal thermal ecology of adult walleye (Sander vitreus) in Lake Huron and Lake Erie

Peat, Tyler B.; Hayden, Todd A.; Gutowsky, Lee F.G.; Vandergoot, Christopher S.; Fielder, David G.; Madenjian, Charles P.; Murchie, Karen J.; Dettmers, John M.; Krueger, Charles C.; Cooke, Steven J.

doi:10.1016/j.jtherbio.2015.08.009

Cited by 33 publications

(20 citation statements)

References 55 publications

(66 reference statements)

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“…Our results were comparable to a study conducted in Warner Lake, Canada, that may be similar thermally to Lake Erie, which reported that sutures remained in largemouth bass up to 733 days post-surgery [9]. Based upon walleye tagged and released at the same time as the fish used in the present study, but outfitted with temperature loggers, our fish most likely experienced seasonal temperatures ranging on average from 2 to 21 °C, with three seasons at temperatures <12 °C [29]. We suspect that low temperatures were a likely variable in protracted suture retention for this study.…”

Section: Discussionsupporting

confidence: 87%

Estimating incision healing rate for surgically implanted acoustic transmitters from recaptured fish

et al. 2017

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Background: Intracoelomic implantation of electronic tags has become a common method in fishery research, but rarely are fish examined by scientists after release to understand the extent that surgical incisions have healed. Walleye (Sander vitreus) are a valuable, highly exploited fishery resource in the Laurentian Great Lakes. Here, fishery capture of walleye with internal acoustic transmitters combined with a high reward program provided multiple opportunities to examine photographs and quantify the status of surgical incisions. Walleye (n = 926) from reef and river spawning populations in Lake Erie and Lake Huron were implanted with acoustic transmitters during spring spawning events from 2011 to 2016. Incisions were closed with polydioxanone monofilament using two to three interrupted sutures. Out of 276 recaptured fish, 60 incision sites were clearly visible in photographs, and these were scored by two independent readers for incision closure, inflammation, and the presence of sutures.Results: While incision sites were completely closed by 61 days post-release (95% CI 44-94), sutures remained for up to 866 days. Sutures were expelled serially during a protracted period, and the probability of observing at least one suture in a recaptured fish declined below 50% after 673 days (95% CI 442-1016). Inflammation at the incision increased during the first 71 days and then declined monotonically, remaining detectable at low levels. Conclusion:Our results emphasized that sutures remained in free-ranging fish past the time when they were beneficial for incision healing. Most dissolvable sutures have been designed for use in endotherms where the body temperature and internal milieu differ dramatically from the conditions experienced by fishes in temperate climates. Identification of new suture materials for fish that facilitate healing while absorbing or dissolving in a reasonable period (e.g., a few weeks to three months) in colder temperatures (e.g., <12 °C) would be beneficial to mitigate potential adverse impacts from inflammation at the incision.

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Section: Discussionsupporting

confidence: 87%

Estimating incision healing rate for surgically implanted acoustic transmitters from recaptured fish

et al. 2017

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“…This separation was chosen based on the approximate timing of the migration in mid-June of some walleye out of Saginaw Bay (Peat et al, 2015). This separation was chosen based on the approximate timing of the migration in mid-June of some walleye out of Saginaw Bay (Peat et al, 2015).…”

Section: Methodsmentioning

confidence: 99%

“…Diets were further separated into two time periods, an early period of April-mid-June, and a late period of mid-June-November. This separation was chosen based on the approximate timing of the migration in mid-June of some walleye out of Saginaw Bay (Peat et al, 2015). Diet was summarised as the percent of total measured prey weight and as frequency of occurrence for walleye in each region and time period.…”

Section: Methodsmentioning

confidence: 99%

“…Presently, about 40% of the Saginaw Bay spawning stock migrates into the main basin after spawning season with most returning in late fall (Hayden et al, 2014). While residing in either Saginaw Bay or Lake Huron, walleye are presumably exposed to differing prey assemblages Roseman, Chriscinske, Castle, & Bowser, 2015) and thermal environments (Peat et al, 2015). Prey types can vary in energy content, which in turn can influence the condition, growth and consumption requirements of their predators (Madenjian et al, 2000;Pothoven & Madenjian, 2008;Pothoven et al, 2006 coupled a stock assessment model with a bioenergetics model to estimate that annual consumption of prey fish by walleye residing in Lake Huron's main basin increased about threefold during [2003][2004][2005][2006][2007][2008].…”

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confidence: 99%

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Feeding ecology of the walleye (Percidae,Sander vitreus), a resurgent piscivore in Lake Huron (Laurentian Great Lakes) after shifts in the prey community

Pothoven

Madenjian

Höök

2016

Ecology of Freshwater Fish

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Recovering populations of piscivores can challenge understanding of ecosystem function due to impacts on prey and to potentially altered food webs supporting their production. Stocks of walleye (Percidae, Sander vitreus), an apex predator in the Laurentian Great Lakes, crashed in the mid-1900s. Management efforts led to recovery by 2009, but recovery coincided with environmental and fish community changes that also had implications for the feeding ecology of walleye. To evaluate potential changes in feeding ecology for this apex predator, we assessed diets in the main basin of Lake Huron and in Saginaw Bay, a large embayment of Lake Huron, during 2009-2011. Walleye switched their diets differently in the main basin and Saginaw Bay, with non-native round goby (Gobiidae, Neogobius melanostomus) and rainbow smelt (Osmeridae, Osmerus mordax) more prevalent in diets in the main basin, and invertebrates, yellow perch (Percidae, Perca flavescens) and gizzard shad (Clupeidae, Dorosoma cepedianum) more prevalent in diets in the bay. Feeding strategy plots indicated that there was a high degree of individual specialisation by walleye in the bay and the main basin. Bioenergetic simulations indicated that walleye in Saginaw Bay need to consume 10%-18% more food than a walleye that spends part or all of the year in the main basin, respectively, in order to achieve the same growth rate. The differences in diets between the bay and main basin highlight the flexibility of this apex predator in the face of environmental changes, but changes in diet can alter energy pathways supporting piscivore production. K E Y W O R D Salewife, diet overlap, feeding strategy, Saginaw Bay, Sander vitreus

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“…Although admittedly an imperfect control, we assume that short-term behavioural effects of tagging have been ameliorated in fish tagged 10+ months earlier. This study represents one of the few behavioural assessments of wild fish in this context (but see Peat et al 2015) and explores the short-term consequences of electronic tag implantation. Such information is essential for evaluating whether data require censoring after release to ensure that inferences regarding behaviour of individual fish are representative of untagged conspecifics.…”

Section: Introductionmentioning

confidence: 99%

Do intracoelomic telemetry transmitters alter the post‐release behaviour of migratory fish?

Wilson

Hayden

Vandergoot

et al. 2016

Ecology of Freshwater Fish

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Electronic tags have become a common tool in fish research, enhancing our understanding of how fish interact with their environment and move among different habitats, for estimating mortality and recording internal physiological states. An often‐untested assumption of electronic tagging studies is that tagged fish are representative of untagged conspecifics and thus show ‘normal’ behaviour (e.g. movement rates, swimming activity, feeding). Here, we use a unique data set for potamadromous walleye (Sander vitreus) in Lake Huron and Lake Erie tributaries to assess whether the lack of appropriate controls in electronic tagging could seriously affect behavioural data. We used fish tagged in previous years and compared their migratory behaviour during the spawning season to fish tagged in a current year at the same location. The objective of the study was to determine whether intracoelomic acoustic tag implantation altered downstream movement of walleye after spawning. Fish tagged in a given season travelled slower downstream from two river spawning sites than fish tagged in previous years. Fish tagged one or two years earlier showed no differences between each other in downstream travel time, in contrast to fish tagged in a given year. Our results support notions that standard collection and intracoelomic tagging procedures can alter short‐term behaviour (i.e. days, weeks, months), and as such, researchers should use caution when interpreting data collected over such time periods. Further, whenever possible, researchers should also explicitly evaluate post‐tagging effects on behaviour as part of their experimental objectives.

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Seasonal thermal ecology of adult walleye (Sander vitreus) in Lake Huron and Lake Erie

Cited by 33 publications

References 55 publications

Estimating incision healing rate for surgically implanted acoustic transmitters from recaptured fish

Estimating incision healing rate for surgically implanted acoustic transmitters from recaptured fish

Feeding ecology of the walleye (Percidae,Sander vitreus), a resurgent piscivore in Lake Huron (Laurentian Great Lakes) after shifts in the prey community

Do intracoelomic telemetry transmitters alter the post‐release behaviour of migratory fish?

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