Contrasting Population Demographics of Invasive Silver Carp between an Impounded and Free‐Flowing River

Stuck, Jason; Porreca, Anthony P.; Wahl, David H.; Colombo, Robert E.

doi:10.1080/02755947.2014.986343

Cited by 23 publications

(30 citation statements)

References 52 publications

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“…For example, during 2009, a strong year‐class of Silver Carp identified herein and during other studies within the Illinois River (Morgeson ; Stuck et al. ) coincided with high river discharges. However, large year‐classes of Silver Carp in the middle Illinois River were also reported in 2008 (Gibson‐Reinemer et al.…”

Section: Discussionsupporting

confidence: 71%

“…For example, Silver Carp populations from Illinois River (Stuck et al. ) and Wabash River (Morgeson ) sites produced stronger year‐classes during 2009, when high, sustained discharge events were present for greater than 3 months (USGS ). In other studies, similar patterns have been qualitatively discussed (Hayer et al.…”

Section: Discussionmentioning

confidence: 99%

“…At each site, Silver Carp were captured using daytime boat electroshocking (Smith‐Root [Des Moines and Missouri River sites only] or MBS‐1D Wisconsin‐style control box; DC, 4–13 A, 100–500 V, and 60 pulses/s, with two netters) using a “standardizing by power” approach (i.e., Miranda ) focused on side channel, channel border, and backwater habitats (e.g., Wanner and Klumb ; Stuck et al. ).…”

Section: Methodsmentioning

confidence: 99%

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Factors Regulating Year‐Class Strength of Silver Carp Throughout the Mississippi River Basin

et al. 2018

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Recruitment of many fish populations is inherently highly variable interannually. However, this variability can be synchronous at broad geographic scales due to fish dispersal and climatic conditions. Herein, we investigated recruitment synchrony of Silver Carp Hypophthalmichthys molitrix across the Mississippi River basin. Year‐class strength (YCS) and synchrony of nine populations (maximum linear distance = 806.4 km) were indexed using catch‐curve residuals correlated between sites and related to local and regional climatic conditions. Overall, Silver Carp YCS was not synchronous among populations, suggesting that local environmental factors are more important determinants of YCS than large‐scale environmental factors. Variation in Silver Carp YCS was influenced by river base flow and discharge variability at each site, indicating that extended periods of static local discharge benefit YCS. Furthermore, river discharge and air temperature were correlated and synchronized among sites, but only similarities in river discharge were correlated with Silver Carp population synchrony, indicating that similarities in discharge (i.e., major flood) among sites can positively synchronize Silver Carp YCS. The positive correlation between Silver Carp YCS and river discharge synchrony suggests that regional flood regimes are an important force determining the degree of population synchrony among Mississippi River Silver Carp populations.

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Section: Discussionsupporting

confidence: 71%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Factors Regulating Year‐Class Strength of Silver Carp Throughout the Mississippi River Basin

et al. 2018

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“…In the Illinois River, Silver Carp can reach 200 mm TL by age 1 (Stuck et al. ), and based on typical Largemouth Bass length frequencies in this system (Raibley et al. ), would be too large to be effectively consumed by these predators (i.e., prey > 50% predator TL: Einfalt et al.…”

Section: Discussionmentioning

confidence: 99%

Vulnerability of Juvenile Bighead and Silver Carps to Predation by Largemouth Bass

Sanft

Parkos²,

Collins³

et al. 2018

Trans Am Fish Soc

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The establishment of Bighead Carp Hypophthalmichthys nobilis and Silver Carp H. molitrix throughout the Mississippi River basin potentially expands the prey base for native predators. A mechanistic understanding of interactions between nonnative prey and native predators is needed to assess the potential for predator regulation of Hypophthalmichthys carp populations and impacts on native predator assemblages. We conducted a series of experiments to quantify the selectivity and efficiency of Largemouth Bass Micropterus salmoides predation on juveniles of both of these Hypophthalmichthys species and behaviors that potentially influence this selectivity and efficiency. Selectivity was measured over 24 h in 2‐m‐diameter pools containing one of two prey assemblages consisting of three individuals from each of three species: (1) Bighead Carp with native littoral (Bluegill Lepomis macrochirus) and pelagic prey (Golden Shiner Notemigonus crysoleucas) or (2) Bighead Carp, Silver Carp, and a morphologically similar native prey (Gizzard Shad Dorosoma cepedianum). Foraging efficiency and predator–prey behaviors were quantified in 45‐min trials in which Largemouth Bass foraged on 10 individuals of a single prey species inside a 750‐L observation tank. All prey species were readily attacked and consumed by Largemouth Bass; Silver Carp were selected less often than Gizzard Shad, and Bighead Carp were selected at a higher rate than any of the other prey species. Of the species tested, Bighead Carp formed the tightest schools and were captured most efficiently by Largemouth Bass. Overall, Hypophthalmichthys carps were similar to native prey in their vulnerability to Largemouth Bass; therefore, factors affecting Hypophthalmichthys carp availability relative to native prey may shape postinvasion predator–prey interactions.

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“…Fish total length was also included in the full model as a fixed effect as bigheaded carp groups in different years and pools differed in initial length (evaluated using generalised linear model [Gaussian] with hybrid group as fixed effect and pool and year as random effects, F 4,556 = 213, p < 0.0001). Fish total length at the time a movement was made was estimated by combining the total length when the individual was tagged (Table S1) with estimated growth in the time since tagging using observed growth rates of silver carp from the Illinois River (Stuck, Porreca, Wahl, & Colombo, ). Bighead carp growth rates for the Illinois River and growth rates of different hybrid bigheaded carps were not available in the literature for the study period, which precluded using different growth rates for the different bigheaded carp groups.…”

Section: Methodsmentioning

confidence: 99%

Early generation hybrids may drive range expansion of two invasive fishes

Coulter

Brey

Lamer³

et al. 2019

Freshwater Biology

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Introgressive hybridisation between two invasive species has the potential to contribute to their invasion success and provide genetic resiliency to rapidly adapt to new environments. Additionally, differences in the behaviour of hybrids may lead to deleterious ecosystem effects that compound any negative impacts of the invading parental species. Invasive silver carp (Hypophthalmichthys molitrix) and bighead carp (Hypophthalmichthys nobilis) provide an opportunity to evaluate how hybridisation may influence the behaviour, dispersal, and spread of an invasive species introgressive complex. In order to investigate the role hybrids may have in the invasion ecology of bigheaded carps, we examined the distribution, movements, and environmental cues for movement of two invasive fishes and their hybrids in the Illinois River (U.S.A.). Early generation hybrids (e.g. F1,F2, and first‐generation backcross individuals) composed a greater proportion of the population at the invasion front where abundances of bigheaded carp were low. A greater proportion of early hybrids passed through dams upstream towards the invasion front than did other hybrids and parental species. The movements and environmental cues for movement of late‐generation backcrosses (more genetically similar to parental genotype) were not different from the parental species with which they shared the most alleles. Although the direction of the relationship between movement and environment was sometimes different for the parental species and associated advanced generation hybrids, these results indicate that management for parental species will also affect most hybrids. Although early generation hybrids are rare, our results indicate they may disperse towards low‐density population zones (i.e. invasion fronts) or are produced at greater frequency in low‐density areas. These rare hybrids have the potential to produce a variety of unique genetic combinations that could result in more rapid adaptation of a non‐native population to their invaded range potentially facilitating the establishment of invasive species.

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Contrasting Population Demographics of Invasive Silver Carp between an Impounded and Free‐Flowing River

Cited by 23 publications

References 52 publications

Factors Regulating Year‐Class Strength of Silver Carp Throughout the Mississippi River Basin

Factors Regulating Year‐Class Strength of Silver Carp Throughout the Mississippi River Basin

Vulnerability of Juvenile Bighead and Silver Carps to Predation by Largemouth Bass

Early generation hybrids may drive range expansion of two invasive fishes

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