Signal crayfish <i>(Pacifastacus leniusculus)</i> predation upon Atlantic salmon <i>(Salmo salar)</i> eggs

Findlay, J. D.; Riley, W. D.; Lucas, Martyn C.

doi:10.1002/aqc.2480

Cited by 17 publications

(14 citation statements)

References 30 publications

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“…For instance, in Japan the invasive P. leniusculus is competitively superior to the native Cambaroides japonicus (De Haan, 1841), which may partially explain the displacement of this species (Nakata & Goshima, 2003;Usio, Konishi, & Nakano, 2001). Previous studies have shown that P. leniusculus and P. clarkii prey on various native species; for example, P. leniusculus can consume Atlantic salmon eggs under laboratory conditions and P. clarkii was found preying on Rhinella ornate, a frog species in Brazil (Banci, Viera, Marinho, Calixto, & Marques, 2013;Findlay, Riley, & Lucas, 2015;Loureiro et al, 2015;Rosewarne et al, 2016). In addition, burrowing behaviours of P. clarkii and P. leniusculus can lead to river bank erosion which increases the water turbidity (Correia & Ferreira, 1995;Faller et al, 2016;Holdich, James, Jackson, & Peay, 2014;Loureiro et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Impacts of climate change on the global potential distribution of two notorious invasive crayfishes

et al. 2019

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1. Invasive alien species and climate change are two of the most serious global environmental threats. In particular, it is of great interest to understand how changing climates could impact the distribution of invaders that pose serious threats to ecosystems and human activities.2. In this study, we developed ensemble species distribution models for predicting the current and future global distribution of the signal crayfish Pacifastacus leniusculus and the red swamp crayfish Procambarus clarkii, two of the most highly problematic invaders of freshwater ecosystems worldwide. We collected occurrence records of the species, from native and alien established ranges worldwide.These records in combination with averaged observations of current climatic conditions were used to calibrate a set of 10 distinct correlative models for estimating the climatic niche of each species. We next projected the estimated niches into the geographical space for the current climate conditions and for the 2050s and 2070s under representative concentration pathway 2.6 and 8.5 scenarios.3. Our species distribution models had high predictive abilities and suggest that annual mean temperature is the main driver of the distribution of both species.Model predictions indicated that the two crayfish species have not fully occupied their suitable climates and will respond differently to future climate scenarios in different geographic regions. Suitable climate for P. leniusculus was predicted to shift poleward and to increase in extent in North America and Europe but decrease in Asia. Regions with suitable climate for P. clarkii are predicted to widen in Europe but contract in North America and Asia.4. This study highlights that invasive species with different thermal preference are likely to respond differently to future climate changes. Our results provide important information for policy makers to design and implement anticipated measures for the prevention and control of these two problematic species. K E Y W O R D Sclimate change, habitat suitability, Pacifastacus leniusculus, Procambarus clarkii, species distribution modelling

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Section: Introductionmentioning

confidence: 99%

Impacts of climate change on the global potential distribution of two notorious invasive crayfishes

et al. 2019

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“…To complicate this story, the diversity and abundance of predacious aquatic invasive species have increased globally, and each invasion has negative implications for fish eggs during incubation (Lederer et al, 2008;Morse, Baldridge, & Sargent, 2013). For example, Findlay, Riley, and Lucas (2015) reported that egg consumption by a single exotic crayfish species of Atlantic salmon (Salmo salar) eggs significantly increased mortality, especially when the predator population was composed of larger bodied individuals that could effectively excavate redds and extract eggs. Rusty crayfish Orconectes rusticus, native to the Ohio River basin (Momot, Gowing, & Jones, 1978), have now become a prolific invasive species in many tributaries and lakes across the Great Lakes basin (Olden, Mccarthy, Maxted, Fetzer, & Jake, 2006).…”

Section: Introductionmentioning

confidence: 99%

Effects of crayfish density, body size and substrate on consumption of lake sturgeon (Acipenser fulvescens Rafinesque, 1817) eggs by invasive rusty crayfish [(Orconectes rusticus (Girard, 1852)]

et al. 2018

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Summary The density and size of benthic predators such as crayfish and the physical characteristics of aquatic habitats including benthic substrate size have been hypothesized to significantly affect levels of lake sturgeon (Acipenser fulvescens) egg consumption. The invasive rusty crayfish (Orconectes rusticus) was used to quantify consumption and apportion variation in egg loss in an experimental setting. Experiments consisted of large flow‐through rectangular tanks (0.8 m wide, 2.96 m2 total bottom surface area) receiving river water to mimic natural diel temperature regimes. Four crayfish densities were tested (5, 10, 15, 30 individuals or 1.7, 3.4, 5.1, 10.1 individuals/m2) that span the range of densities observed in natural settings. Crayfish were allowed to freely move among three substrates commonly found at spawning locations where lake sturgeon eggs are deposited (cobble, gravel and sand). After an acclimation period (15 min), 200 lake sturgeon eggs were randomly scattered over each substrate category (600 eggs per tank). Mean (± SE) egg consumption over 48 hr was 80 ± 3% (range 19–100% across 16 replicate trials). Egg consumption increased significantly as a function of increasing crayfish density. The effect of substrate size, however, depended significantly on crayfish density (substrate size × predator density interaction). Egg consumption significantly increased as substrate size decreased (e.g. from gravel to sand), at both high and low crayfish densities. Egg consumption also increased with increasing mean crayfish body size. Our results revealed that levels of lake sturgeon egg consumption by rusty crayfish are high in some settings. Further work is needed to determine if egg consumption in natural river settings is similarly high and whether egg consumption by crayfish and other egg predators could negatively affect population levels of recruitment.

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“…Similar to roach (egg diameter = 1.0–1.6 mm; Pinder , ) and common bream (egg diameter = 2.0 mm; Pinder, ), barbel eggs and emerging larvae are much smaller (1.9 mm mean diameter and ≈12.5 mm total length (TL), respectively) than those of Atlantic salmon (5.5 mm mean diameter and ≈25 mm TL, respectively; Findlay, Riley, & Lucas, ). The depth of egg burial by barbel, which was replicated in this investigation, appears to be sufficient to prevent pre‐emergent predation by signal crayfish.…”

Section: Resultsmentioning

confidence: 99%

“…However, the removal of barriers to spawning migration can increase potential spawning area (Lucas & Baras, ). When used in conjunction with habitat improvements to increase egg/embryo burial depth and intra‐gravel survival, barrier removal could prove to be a more effective conservation measure than conventional invasive crayfish control/removal methods, which are often ineffective at reducing numbers (Findlay et al, ).…”

Section: Resultsmentioning

confidence: 99%

Predation by invasive signal crayfish on early life stages of European barbel may be limited

Copp

Godard

Vilizzi

et al. 2017

Aquatic Conservation

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1.To determine whether or not signal crayfish Pacifastacus leniusculus and native white-clawed crayfish Austropotamobius pallipes prey on European barbel Barbus barbus eggs, interstitial free-embryos and emergent larvae, experiments were undertaken in salmonid (substratum) incubators (six treatments, four controls) fitted with video recorders. 2.No corpses or remains of emergent barbel larvae or eggs, or parts thereof, were observed in any of the incubators containing buried eggs, and no emergent larvae showed any sign of attack. However, video evidence of a signal crayfish catching and consuming a barbel larva was obtained.3. There were no statistically significant differences between white-clawed and signal crayfish either in carapace length or weight at the beginning and end of the experiments. The conservation implications of these results are discussed.

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Signal crayfish (Pacifastacus leniusculus) predation upon Atlantic salmon (Salmo salar) eggs

Cited by 17 publications

References 30 publications

Impacts of climate change on the global potential distribution of two notorious invasive crayfishes

Impacts of climate change on the global potential distribution of two notorious invasive crayfishes

Effects of crayfish density, body size and substrate on consumption of lake sturgeon (Acipenser fulvescens Rafinesque, 1817) eggs by invasive rusty crayfish [(Orconectes rusticus (Girard, 1852)]

Predation by invasive signal crayfish on early life stages of European barbel may be limited

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