Evidence of yellow perch, largemouth bass and pumpkinseed metapopulations in coastal embayments of Lake Ontario

Murphy, Shidan C.; Collins, Nicholas C.; Doka, Susan E.; Fryer, Brian J.

doi:10.1007/s10641-012-9978-4

Cited by 19 publications

(15 citation statements)

References 40 publications

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“…This finding supports the conclusions of Murphy et al (2012), who use otolith microchemistry to show that pumpkinseed, yellow perch (Perca flavescens) and largemouth bass (Micropterus salmoides) in embayments of the Toronto Harbour move from their natal habitats after their first winter. As further evidence of habitat connectivity, our data indicates that a number of age ≥ 1 fish achieved more than 45 mm in total length in their first year of life, much larger than any YOY pumpkinseed we captured, even in the Lower Exchange Embayment.…”

Section: Management Implicationssupporting

confidence: 87%

The effects of cool and variable temperatures on the hatch date, growth and overwinter mortality of a warmwater fish in small coastal embayments of Lake Ontario

Murphy

Collins

Doka

2012

Journal of Great Lakes Research

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Section: Management Implicationssupporting

confidence: 87%

The effects of cool and variable temperatures on the hatch date, growth and overwinter mortality of a warmwater fish in small coastal embayments of Lake Ontario

Murphy

Collins

Doka

2012

Journal of Great Lakes Research

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“…We are unsure why spatial tag recovery models have not been applied to freshwater systems; in our opinion, the estimates from these models are just as relevant and would be just as beneficial in formulating management decisions for freshwater systems as they are for marine systems. Spatial structuring of freshwater fish populations has been demonstrated in large lentic and lotic systems (Gresswell et al 1994;Peterson and Farrae 2011;Murphy et al 2012), and there is little doubt that spatial tag recovery models would be beneficial for clarifying how mortality components and movements differ between spatial regions for such systems. However, even in smaller water bodies, fish populations can have complex spatial structure due to a myriad of factors, such as differing migration patterns, predation vulnerabilities, and agonistic interactions with conspecifics (Werner and Hall 1988;Ruzycki and Wurtsbaugh 1999;Kerr et al 2010;Collins et al 2013).…”

Section: Discussionmentioning

confidence: 99%

Spatially Varying Population Demographics and Fishery Characteristics of Lake Erie Walleyes Inferred from a Long‐Term Tag Recovery Study

Vandergoot

Brenden

2014

Trans Am Fish Soc

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Although the Lake Erie population of Walleyes Sander vitreus exhibits complex spatial structuring, the extent to which population demographics also vary spatially is unknown. Using a spatial tag recovery model, we estimated region-and age-specific mortalities and regional movement probabilities by using recoveries from a jaw tagging study initiated in 1990. The best-performing model based on a comparison of quasi-likelihood Akaike's information criterion values had age-group-specific movement probabilities, age-and region-specific natural mortalities, and age-group-and region-specific annual fishing mortalities. Commercial fishing mortality varied considerably during the study, while recreational fishing mortality was more static. Natural mortality of age-5 and older Walleyes was lower than that of younger fish in all regions, with values ranging from 0.30 to 0.40 for age-4 and younger fish and from 0.13 to 0.27 for age-5 and older fish. In Lake Erie's western basin, natural mortality of age-4 fish was lower than that of age-3 fish. Sensitivity analyses indicated that some natural mortality estimates were sensitive to (1) prior probability distributions assigned to mortality components and (2) assumed movement probabilities in regions where no tagging was conducted. The decline in natural mortality with age in Lake Erie's western basin matches what has been found for other populations, suggesting that such patterns are perhaps common in exploited Walleye populations. Movement probabilities in the western basin were greater than those in the combined central and eastern basins. The mortality rates and movement probabilities estimated in this study should assist in the parameterization and scaling of a spatially explicit Lake Erie Walleye assessment model, the development of which has been recommended for the lake's quota management system. Our study is one of the first to apply a spatial tag recovery model to a freshwater fish population for estimating mortality components. We encourage wider use of this method to improve the understanding of how mortality components and movements vary regionally within freshwater systems.

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“…Given its proximate location to the largest urban centre in Canada, Toronto Harbour has a history of development and anthropogenic disturbance such that the system now contains a combination of some remnant natural features (portions of the Toronto Islands), created or remediated habitats (Tommy Thompson Park; TTP), hardened shorelines and structures (e.g., slips along the northern and eastern shorelines), as well as large open areas and dredged shipping channels (Figure 1). Despite a legacy of disturbance, the harbour is still inhabited by a diverse array of warm and coolwater fish species (Dietrich et al, 2008;Murphy, Collins, Doka, & Fryer, 2012). As part of an ongoing study of fish movements within the harbour directed at informing habitat creation and remediation, a large-scale acoustic telemetry array has been deployed in the harbour since 2010 ( Figure 1).…”

Section: Study Areamentioning

confidence: 99%

Tracking bowfin with acoustic telemetry: Insight into the ecology of a living fossil

Midwood

Gutowsky

Hlevca

et al. 2017

Ecology of Freshwater Fish

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Little is known about the spatial ecology and behaviour of bowfin (Amia calva), despite the fact that it is an important freshwater carnivore, the last living member of the Amiiformes and effectively a living fossil. In the summer of 2013, acoustic telemetry transmitters were surgically implanted in ten bowfin captured in Toronto Harbour on Lake Ontario. Using a stationary acoustic telemetry array that covered most of the 18-km 2 harbour, the residency and movement patterns of bowfin were tracked from their release until November 2014. Detected bowfin ranged in size from 562 to 725 mm total length and included six males and three females (one female was not detected). Bowfin showed high site fidelity with most fish detections concentrated in embayments and within the Toronto Islands, areas characterised by relatively high stable water temperatures and submerged vegetative cover. Statistical modelling revealed that bowfin residency was significantly affected by season, body size, sitespecific estimates of vegetative cover and an interaction between body size and season. Bowfin residency increased with vegetative cover and was highest for large fish during the winter and fall months. Despite the overall high site fidelity exhibited by individuals, several bowfin were mobile over the spring and summer months and moved 5.2-12.9 km among telemetry receivers in the inner and outer harbours. The results of this study provide insight into the seasonal habitat preference, home range size and activity level of this unique fish. K E Y W O R D SAmia calva, embayment, nearshore, residency, Toronto, wetland

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Evidence of yellow perch, largemouth bass and pumpkinseed metapopulations in coastal embayments of Lake Ontario

Cited by 19 publications

References 40 publications

The effects of cool and variable temperatures on the hatch date, growth and overwinter mortality of a warmwater fish in small coastal embayments of Lake Ontario

The effects of cool and variable temperatures on the hatch date, growth and overwinter mortality of a warmwater fish in small coastal embayments of Lake Ontario

Spatially Varying Population Demographics and Fishery Characteristics of Lake Erie Walleyes Inferred from a Long‐Term Tag Recovery Study

Tracking bowfin with acoustic telemetry: Insight into the ecology of a living fossil

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