The impact of signal crayfish (<i>Pacifastacus leniusculus</i>) on the recruitment of salmonid fish in a headwater stream in Yorkshire, England

Peay, S.; Guthrie, Nadine A.; Spees, Jack; Nilsson, Erika; Bradley, Paul M.

doi:10.1051/kmae/2010003

Cited by 44 publications

(56 citation statements)

References 26 publications

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“…Further longer-term studies of the population level consequences of crayfish invasion are required. Several studies have found lower populations in the presence of signal crayfish (Guan and Wiles 1997;Peay et al 2009), whereas others have not (Stenroth and Nyström 2003;Degerman et al 2007); comprehensive studies of fish populations pre-to post-invasion and assessed relative to the 'natural state' (i.e. with the presence of native crayfish) are required to address this question.…”

Section: Discussionmentioning

confidence: 99%

Invasive crayfish impacts on native fish diet and growth vary with fish life stage

et al. 2016

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Assessing the impacts of invasive organisms is a major challenge in ecology. Some widespread invasive species such as crayfish are potential competitors and reciprocal predators of ecologically and recreationally important native fish species. Here, we examine the effects of signal crayfish (Pacifastacus leniusculus) on the growth, diet, and trophic position of the chub (Squalius cephalus) in four rivers in Britain. Growth rates of 0? chub were typically lower in sympatric populations with signal crayfish compared with allopatric populations, and this effect could be traced through to 2? chub in one river. However, growth rates of older chub (5? to 6?) were typically higher in the presence of crayfish. Sympatry with crayfish resulted in lower chub length-at-age and mass-at-age in half of the rivers sampled, with no change detected in the other rivers. Stable isotope analyses (d 13 C and d 15 N) revealed that both chub and crayfish were omnivorous, feeding at multiple trophic levels and occupying similar trophic positions. We found some evidence that chub trophic position was greater at invaded sites on one river, with no difference detected on a second river. Mixing models suggested crayfish were important food items for both small and large chub at invaded sites. This study provides evidence that invasive species can have both positive and negative effects on different life stages of a native species, with the net impact likely to depend on responses at the population level.

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Section: Discussionmentioning

confidence: 99%

Invasive crayfish impacts on native fish diet and growth vary with fish life stage

et al. 2016

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“…Field surveys in rivers revealed negative relationships between the abundance of crayfish and the abundance of benthic fishes (Guan and Wiles 1997;Bubb et al 2009;Peay et al 2009). From a long term survey, Wilson et al (2004) found that the invasion of rusty crayfish (Orconectes rusticus Girard) also decreased the density of non-predatory fish in a northern lake.…”

Section: Introductionmentioning

confidence: 99%

Do introduced crayfish affect benthic fish in stony littoral habitats of large boreal lakes?

Ruokonen

Kiljunen

Pursiainen³

et al. 2011

Biol Invasions

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Invasive crayfish are spreading rapidly across Europe, where they are replacing the native crayfish species and impacting negatively on some other biota. Freshwater crayfish and many benthic fishes share similar habitat and food requirements and hence potentially compete for resources. In this study, we investigated impacts of the introduced signal crayfish (Pacifastacus leniusculus) on fish in stony littoral habitats of two large boreal lakes. We compared the littoral fish community composition and the densities of two common benthic fish species between sites with and without crayfish. To evaluate whether signal crayfish share the same food resources as benthic littoral fish or change their feeding habits, we used mixing models and trophic niche estimates based on analyses of stable isotopes of carbon and nitrogen. Both the community composition of littoral fish and the densities of benthic fish species were similar at sites with and without signal crayfish. Even though stable isotope signatures indicated strong dietary overlap between crayfish and benthic fish, the use of food sources and trophic niche widths of fish were not noticeably different between crayfish sites and non-crayfish sites. Our results suggest that, at current densities, the non-native signal crayfish does not have significant impacts on benthic fish in the stony littoral habitats of large boreal lakes.

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“…White-clawed crayfish have been known to alter the Irish lake habitat by macrophyte reduction (Matthews and Reynolds, 1992;Matthews et al, 1993) and to modify the macroinvertebrate food web (Matthews et al, 1993). There is some reciprocal predation on juvenile stages; trout eat small crayfish, while white-clawed crayfish may eat salmonid eggs and alevins (Peay et al, 2009) and other small fish, including adult stickleback (Reynolds and O'Keeffe, 2005).…”

Section: Interactions Between Indigenous Crayfish Species (Ics) and Fishmentioning

confidence: 99%

“…The range of environmental impacts of signal crayfish has been reviewed by Everard et al (2009). While impacts on fish have not been seen in Sweden (Söderbäck, 1994), signals have been shown to be deleterious to salmonids in UK (Peay et al, 2009). In Britain, since their introduction in the late 1970s, signal crayfish have become increasingly widespread in rivers, causing negative impacts on communities of aquatic plants, invertebrates and benthic fish.…”

Section: > Signal Crayfish Pacifastacus Leniusculusmentioning

confidence: 99%

“…Juvenile Atlantic salmon out of shelter during the day in winter are believed to be very vulnerable to predators, therefore competition from crayfish for winter shelters may be detrimental to Atlantic salmon populations. In a limestone headwater stream in Yorkshire, England, where signal crayfish are progressively replacing white-clawed crayfish, sites with white-clawed crayfish at normal densities (CPUE of 1-2 crayfish per trap night) had abundant juvenile trout, up to 100 per square m (Peay et al, 2009). However, surveys showed a significant negative relationship between resident trout and signal crayfish.…”

Section: > Signal Crayfish Pacifastacus Leniusculusmentioning

confidence: 99%

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A review of ecological interactions between crayfish and fish, indigenous and introduced

Reynolds

2011

Knowl. Managt. Aquatic Ecosyst.

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The impact of signal crayfish (Pacifastacus leniusculus) on the recruitment of salmonid fish in a headwater stream in Yorkshire, England

Abstract: Key-

Cited by 44 publications

References 26 publications

Invasive crayfish impacts on native fish diet and growth vary with fish life stage

Invasive crayfish impacts on native fish diet and growth vary with fish life stage

Do introduced crayfish affect benthic fish in stony littoral habitats of large boreal lakes?

A review of ecological interactions between crayfish and fish, indigenous and introduced

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