Predation by <i>Pacifastacus leniusculus</i> on the intra‐gravel embryos and emerging fry of <i>Salmo salar</i>

Edmonds, Nathan; Riley, W. D.; Maxwell, David

doi:10.1111/j.1365-2400.2011.00797.x

Cited by 26 publications

(29 citation statements)

References 13 publications

(15 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Only fish eggs were available in this trial so we cannot assess the preference for fish eggs relative to other items, however our results do support previous suggestions that eggs are likely to be present in the diet of both E. sinensis (Culver, 2005, unpubl. data; Morritt et al ., ) and P. leniusculus (Edmonds et al ., ). These data suggest that invasion by P. leniusculus and E. sinensis may impact recruitment of these common fish species which spawn on vegetation in the mid to lower reaches of rivers, where both E. sinensis and P. leniusculus reach their highest densities in freshwaters (Rudnick et al ., ; Weinlaender & Fuereder, ).…”

Section: Discussionmentioning

confidence: 97%

Feeding behaviour, predatory functional responses and trophic interactions of the invasive Chinese mitten crab (Eriocheir sinensis) and signal crayfish (Pacifastacus leniusculus)

et al. 2016

View full text Add to dashboard Cite

SUMMARY1. Freshwaters are subject to particularly high rates of species introductions; hence, invaders increasingly co-occur and may interact to enhance impacts on ecosystem structure and function. As trophic interactions are a key mechanism by which invaders influence communities, we used a combination of approaches to investigate the feeding preferences and community impacts of two globally invasive large benthic decapods that co-occur in freshwaters: the signal crayfish (Pacifastacus leniusculus) and Chinese mitten crab (Eriocheir sinensis). 2. In laboratory preference tests, both consumed similar food items, including chironomids, isopods and the eggs of two coarse fish species. In a comparison of predatory functional responses with a native crayfish (Austropotamobius pallipes), juvenile E. sinensis had a greater predatory intensity than the native A. pallipes on the keystone shredder Gammarus pulex, and also displayed a greater preference than P. leniusculus for this prey item. 3. In outdoor mesocosms (n = 16) used to investigate community impacts, the abundance of amphipods, isopods, chironomids and gastropods declined in the presence of decapods, and a decapod >gastropod >periphyton trophic cascade was detected when both species were present. Eriocheir sinensis affected a wider range of animal taxa than P. leniusculus. 4. Stable-isotope and gut-content analysis of wild-caught adult specimens of both invaders revealed a wide and overlapping range of diet items including macrophytes, algae, terrestrial detritus, macroinvertebrates and fish. Both decapods were similarly enriched in 15 N and occupied the same trophic level as Ephemeroptera, Odonata and Notonecta. Eriocheir sinensis d 13 C values were closely aligned with macrophytes indicating a reliance on energy from this basal resource, supported by evidence of direct consumption from gut contents. Pacifastacus leniusculus d 13C values were intermediate between those of terrestrial leaf litter and macrophytes, suggesting reliance on both allochthonous and autochthonous energy pathways. 5. Our results suggest that E. sinensis is likely to exert a greater per capita impact on the macroinvertebrate communities in invaded systems than P. leniusculus, with potential indirect effects on productivity and energy flow through the community.

show abstract

Section: Discussionmentioning

confidence: 97%

Feeding behaviour, predatory functional responses and trophic interactions of the invasive Chinese mitten crab (Eriocheir sinensis) and signal crayfish (Pacifastacus leniusculus)

et al. 2016

View full text Add to dashboard Cite

show abstract

“…In the experimental arena (0·4 m −2 ) in the dark, however, P. leniusculus could easily find one C. albula egg (diameter 0·5–1·0 mm) among the sand grains, at least with no other organic material on the sand. Under experimental conditions, P. leniusculus was also capable of detecting intragravel S. salar eggs buried at ecologically relevant depths (Edmonds et al , ).…”

Section: Discussionmentioning

confidence: 99%

“…Crustaceans have particularly versatile senses to search for protein and energy‐rich food including dead and live fish eggs and larvae (Willman et al , ; Mellon & Humphrey, ). Under experimental conditions, crayfish (Ellrott et al , ; Fitzsimons et al , ; Edmonds et al , ) and other invertebrates (Taylor & Collie, ) have been shown to be efficient predators of eggs and larval fishes. Few studies have aimed to quantify the predation effect at the population level (DeBlois & Leggett, ; Peay et al , ).…”

Section: Introductionmentioning

confidence: 99%

Predation by signal crayfish Pacifastacus leniusculus on fish eggs and its consequences for coregonid recruitment

Ruokonen

Marjomäki

Martikainen

et al. 2015

Journal of Fish Biology

View full text Add to dashboard Cite

The character and magnitude of predation by the invasive, ectothermic Pacifastacus leniusculus, a crayfish widely introduced to Europe and Japan from North America, on the eggs of coregonid fishes, vendace Coregonus albula and whitefish Coregonus lavaretus were examined by experimentation, modelling and field data. The present results showed that P. leniusculus has the potential to be very efficient predator of fish eggs under winter conditions, but the predation by P. leniusculus did not significantly decrease production of coregonid larvae during the years with a high P. leniusculus population in the study lake. Hence, the mortality caused by the novel invertebrate predator appeared to compensate for other yet unexplored mortality factors instead of having an additive effect on the present salmonids.

show abstract

“…This makes it likely that signal crayfish continue to feed actively, presumably using olfactory cues that would persist well in cold water, at temperatures typical of those found in many salmon and trout spawning streams during the period when eggs are buried. Previous experiments involving signal crayfish and buried salmonid eggs have not demonstrated crayfish predation upon these eggs (Edmonds et al , ; Gladman et al , ). These experiments reached differing conclusions about the ability of signal crayfish to detect and dig for eggs, with Gladman et al () suggesting minimal digging activity in the presence of eggs while Edmonds et al () suggested substantial digging in such circumstances.…”

Section: Introductionmentioning

confidence: 92%

“…Previous experiments involving signal crayfish and buried salmonid eggs have not demonstrated crayfish predation upon these eggs (Edmonds et al , ; Gladman et al , ). These experiments reached differing conclusions about the ability of signal crayfish to detect and dig for eggs, with Gladman et al () suggesting minimal digging activity in the presence of eggs while Edmonds et al () suggested substantial digging in such circumstances. In addition, signal and probably other crayfish populations may be dominated numerically by younger, smaller crayfish (Guan and Wiles, ), and these individuals may have better access to buried eggs because they could potentially move through interstitial spaces rather than having to dig to gain access to eggs.…”

Section: Introductionmentioning

confidence: 99%

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

Findlay

Riley

Lucas

2014

Aquatic Conservation

View full text Add to dashboard Cite

Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details.

show abstract

Predation by Pacifastacus leniusculus on the intra‐gravel embryos and emerging fry of Salmo salar

Cited by 26 publications

References 13 publications

Feeding behaviour, predatory functional responses and trophic interactions of the invasive Chinese mitten crab (Eriocheir sinensis) and signal crayfish (Pacifastacus leniusculus)

Feeding behaviour, predatory functional responses and trophic interactions of the invasive Chinese mitten crab (Eriocheir sinensis) and signal crayfish (Pacifastacus leniusculus)

Predation by signal crayfish Pacifastacus leniusculus on fish eggs and its consequences for coregonid recruitment

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

Contact Info

Product

Resources

About