Evaluating the potential role of predation by native fish regulating the abundance of invasive spiny water flea

Martin, Benjamin E.; Mrnak, Joseph T.; Zanden, M. Jake Vander

doi:10.1080/02705060.2023.2187470

Cited by 3 publications

(2 citation statements)

References 56 publications

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“…The fish community composition and predator density greatly varied in our study lakes (and compared to other studies; e.g., Dembkowski et al, 2014;Larson et al, 2018;Wilcox & Meeker, 1992), with Trout Lake containing the greatest diversity and density of predators and Crystal Lake containing the least community diversity and no predators (Martin et al, 2023;Mrnak et al, 2023). Predation may dictate abundances of yellow perch within predator-dominated systems acting as another potential buffering mechanism.…”

Section: Population Characteristicsmentioning

confidence: 62%

Response of yellow perch to water level fluctuations in oligotrophic, north‐temperate inland lakes

Shay,

Sass,

Mrnak

2023

Aquaculture Fish & Fisheries

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Information on yellow perch Perca flavescens population dynamics and responses to various abiotic and biotic factors in oligotrophic, north‐temperate inland lakes is limited. Water level fluctuations are known to influence available habitat and biological communities within the littoral zones of lakes, yet research is lacking for yellow perch in Wisconsin. The goal of our study was to characterize yellow perch population‐level responses to natural water level fluctuations in four northern Wisconsin lakes using a 39‐year time series. On average, increasing water level periods correlated with lower mean fyke net and gill net relative abundances (catch‐per‐unit‐effort), though generally not statistically significant. Yellow perch mean relative weight varied among lakes and was significantly greater during increasing water level periods for all lakes except one. The lack of statistically significant findings potentially suggests a buffering mechanism of north‐temperate oligotrophic lakes due to their small surface area to volume ratios, relative lack of nutrients, and(or) littoral structural habitat compared to other systems (e.g., shallow eutrophic lakes). Our results suggest that natural water level fluctuations may not be an environmental concern for yellow perch populations in some north‐temperate oligotrophic inland lakes.

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Section: Population Characteristicsmentioning

confidence: 62%

Response of yellow perch to water level fluctuations in oligotrophic, north‐temperate inland lakes

Shay,

Sass,

Mrnak

2023

Aquaculture Fish & Fisheries

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“…Despite B. longimanus having many advantages over the other predatory cladocerans in terms of feeding efficiency and diet size range [17,47], it remains the least abundant large-bodied predator in Lake Champlain. The possible cause for this near absence may be due to predation from alewife [48] or native fish species, such as cisco [49]. B. longimanus were the preferred prey for adult alewife in Lake Michigan, and their consumption rate exceeds the B. longimanus production rate [50].…”

Section: Large Predatory Cladoceran Patternsmentioning

confidence: 99%

Invasion of Bythotrephes longimanus and Cercopagis pengoi in Lake Champlain: Impacts on the Native Zooplankton Community

Cutter,

Mihuc,

Myers

2023

Diversity

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The zooplankton community of Lake Champlain has been altered over the past decade due to the introduction of two predatory zooplankton species. Bythotrephes longimanus Leydig, 1860 was first detected in Lake Champlain in August 2014, and Cercopagis pengoi (Ostroumov, 1891) was detected in August 2018. Monitoring for both invasive species at 15 lake sites using whole water tow sampling has been ongoing since 2010 with no detection of either species until 2014. Utilizing data from the Lake Champlain long-term monitoring program, we assessed pre- and post-invasion population dynamics of both invasive species on the native zooplankton community. Our results showed shifts in community structure following invasion, including a reduction in Diacyclops thomasi (Forbes, 1882) populations by both invaders and a reduction in Daphnia retrocurva Forbes, 1882 following the introduction of B. longimanus. Other cyclopoids, bosminids, and rotifers were also reduced, corresponding to both introduced species. The native large-bodied plankton predator Leptodora kindtii (Focke, 1844) appears to be unable to coexist with either invasive predatory cladoceran, displaying seasonal partitioning between L. kindtii and the Cercopagidae. These findings suggest that the invasion of both large predators in Lake Champlain have impacted pelagic zooplankton community structure.

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Stable isotopes reveal trophic ontogeny in Cisco (Coregonus artedi)

Martin,

Mrnak

2024

Journal of Fish Biology

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Cisco (Coregonus artedi) are a widespread, cold‐water zooplanktivore native to North America. Although Cisco are generally referred to as an “obligate zooplanktivore,” there is some evidence that the species exhibits considerable variability in trophic niche. Here, we assessed how Cisco body size relates to trophic position, that is, trophic ontogeny. We analysed 13C and 15N isotopes from Cisco ranging from 127 to 271 mm in body length (n = 66) from Trout Lake, Vilas County, Wisconsin, USA. 15N isotopes showed smaller Cisco had a trophic position of ~3, which steadily increased to ~3.5 for larger Cisco. Further, 13C isotope signatures showed Cisco transitioned to be more pelagically reliant (lower 13C signatures). Using gillnet catch data, we found that larger Cisco were using deeper habitats than smaller Cisco. Our results support that Cisco have significant variability in trophic niche even though they are traditionally thought of as an obligate planktivore. Overall, we emphasize that researchers should be cautious when generalizing Cisco trophic function, particularly when considering the broader food web.

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Evaluating the potential role of predation by native fish regulating the abundance of invasive spiny water flea

Cited by 3 publications

References 56 publications

Response of yellow perch to water level fluctuations in oligotrophic, north‐temperate inland lakes

Response of yellow perch to water level fluctuations in oligotrophic, north‐temperate inland lakes

Invasion of Bythotrephes longimanus and Cercopagis pengoi in Lake Champlain: Impacts on the Native Zooplankton Community

Stable isotopes reveal trophic ontogeny in Cisco (Coregonus artedi)

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