The Experts below are selected from a list of 1944 Experts worldwide ranked by ideXlab platform
Jake Vander M Zanden - One of the best experts on this subject based on the ideXlab platform.
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food web consequences of long term invasive crayfish control
Canadian Journal of Fisheries and Aquatic Sciences, 2013Co-Authors: Gretchen J A Hansen, Jake Vander M Zanden, Catherine L Hein, Brian M Roth, Jereme W Gaeta, Alexander W Latzka, Stephen R CarpenterAbstract:Controlling invasive species can restore ecosystems while also quantifying species interaction strengths. We experimentally removed invasive rusty crayfish (Orconectes rusticus) from a Wisconsin la...
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interactions among invaders community and ecosystem effects of multiple invasive species in an experimental aquatic system
Oecologia, 2009Co-Authors: Pieter T J Johnson, Julian D. Olden, Christopher T Solomon, Jake Vander M ZandenAbstract:With ecosystems increasingly supporting multiple invasive species, interactions among invaders could magnify or ameliorate the undesired consequences for native communities and ecosystems. We evaluated the individual and combined effects of rusty crayfish (Orconectes rusticus) and Chinese mystery snails [Bellamya (=Cipangopaludina) chinensis] on native snail communities (Physa, Helisoma and Lymnaea sp.) and ecosystem attributes (algal chlorophyll a and nutrient concentrations). Both invaders are widespread in the USA and commonly co-occur within northern temperate lakes, underscoring the importance of understanding their singular and joint effects. An outdoor mesocosm experiment revealed that while the two invaders had only weakly negative effects upon one another, both negatively affected the abundance and biomass of native snails, and their combined presence drove one native species to extinction and reduced a second by >95%. Owing to its larger size and thicker shell, adult Bellamya were protected from crayfish attack relative to native species (especially Physa and Lymnaea), suggesting the co-occurrence of these invaders in nature could have elevated consequences for native communities. The per capita impacts of Orconectes (a snail predator) on native snails were substantially greater than those of Bellamya (a snail competitor). Crayfish predation also had a cascading effect by reducing native snail biomass, leading to increased periphyton growth. Bellamya, in contrast, reduced periphyton biomass, likely causing a reduction in growth by native lymnaeid snails. Bellamya also increased water column N:P ratio, possibly because of a low P excretion rate relative to native snail species. Together, these findings highlight the importance of understanding interactions among invasive species, which can have significant community- and ecosystem-level effects.
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fish predation and trapping for rusty crayfish Orconectes rusticus control a whole lake experiment
Canadian Journal of Fisheries and Aquatic Sciences, 2006Co-Authors: Catherine L Hein, Brian M Roth, Anthony R Ives, Jake Vander M ZandenAbstract:Improved methods are needed for the prevention and control of invasive species. We investigated the potential to control a rusty crayfish (Orconectes rusticus) population in an isolated lake in nor...
David M Lodge - One of the best experts on this subject based on the ideXlab platform.
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a long term rusty crayfish Orconectes rusticus invasion dispersal patterns and community change in a north temperate lake
Canadian Journal of Fisheries and Aquatic Sciences, 2004Co-Authors: Karen A Wilson, David M Lodge, John J Magnuson, Anna M Hill, Timothy K Kratz, William Perry, Theodore V WillisAbstract:Rusty crayfish (Orconectes rusticus) were first observed in Trout Lake, Wisconsin, in 1979 and took 19 years to completely disperse around the littoral zone, advancing at an average rate of 0.68 km...
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hybrid zone dynamics and species replacement between Orconectes crayfishes in a northern wisconsin lake
Evolution, 2001Co-Authors: William Perry, David M Lodge, Jeffrey L Feder, Greg DwyerAbstract:Abstract Hybrid zones that result in the genetic assimilation (replacement) of one species by another are underrepresented in the animal literature, most likely due to their transient nature. One such zone involves the rusty crayfish, Orconectes rusticus, and its congener O. propinquus. Orconectes rusticus was recently introduced into northern Wisconsin and Michigan lakes and streams, where it is hybridizing with and displacing resident O. propinquus. Here we report on a study investigating the dynamics of a hybrid zone between the two crayfish in Trout Lake, Wisconsin, where both the time (circa 1979) and location of the initial introduction are known. Our prediction was that hybridization should hasten the demise of O. propinquus because we expected that male O. rusticus (which are larger than congeners) would outcompete male O. propinquus for mates of both species. If hybrid progeny are unfit, then the result would be decreased reproductive output of O. propinquus females. However, we found a pattern o...
William Perry - One of the best experts on this subject based on the ideXlab platform.
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laboratory competition hierarchies between potentially invasive rusty crayfish Orconectes rusticus and native crayfishes of conservation concern
American Midland Naturalist, 2013Co-Authors: Karen Szela, William PerryAbstract:Abstract Introduced crayfishes represent a serious threat to the endangered aquatic fauna of North America and Europe. We used small-scale competition assay experiments to examine competitive hierarchies in the laboratory between male and female Orconectes rusticus and Orconectes illinoiensis, Orconectes indianensis, and Orconectes placidus from southern Illinois. These species are considered threatened in Illinois and there is a potential for O. rusticus to become established in drainages inhabited by these species. Using sex and size-matched laboratory competition trials for a limited food resource, we found that both male and female O. rusticus were competitively dominant to O. placidus, O. illinoiensis and O. indianensis (P 0.05). Female O. placidus were, however, competitively dominant to O. illinoiensis which was dominant to O. indianensis (P < 0.05). These simple laboratory competition experimen...
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a long term rusty crayfish Orconectes rusticus invasion dispersal patterns and community change in a north temperate lake
Canadian Journal of Fisheries and Aquatic Sciences, 2004Co-Authors: Karen A Wilson, David M Lodge, John J Magnuson, Anna M Hill, Timothy K Kratz, William Perry, Theodore V WillisAbstract:Rusty crayfish (Orconectes rusticus) were first observed in Trout Lake, Wisconsin, in 1979 and took 19 years to completely disperse around the littoral zone, advancing at an average rate of 0.68 km...
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hybrid zone dynamics and species replacement between Orconectes crayfishes in a northern wisconsin lake
Evolution, 2001Co-Authors: William Perry, David M Lodge, Jeffrey L Feder, Greg DwyerAbstract:Abstract Hybrid zones that result in the genetic assimilation (replacement) of one species by another are underrepresented in the animal literature, most likely due to their transient nature. One such zone involves the rusty crayfish, Orconectes rusticus, and its congener O. propinquus. Orconectes rusticus was recently introduced into northern Wisconsin and Michigan lakes and streams, where it is hybridizing with and displacing resident O. propinquus. Here we report on a study investigating the dynamics of a hybrid zone between the two crayfish in Trout Lake, Wisconsin, where both the time (circa 1979) and location of the initial introduction are known. Our prediction was that hybridization should hasten the demise of O. propinquus because we expected that male O. rusticus (which are larger than congeners) would outcompete male O. propinquus for mates of both species. If hybrid progeny are unfit, then the result would be decreased reproductive output of O. propinquus females. However, we found a pattern o...
Catherine L Hein - One of the best experts on this subject based on the ideXlab platform.
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food web consequences of long term invasive crayfish control
Canadian Journal of Fisheries and Aquatic Sciences, 2013Co-Authors: Gretchen J A Hansen, Jake Vander M Zanden, Catherine L Hein, Brian M Roth, Jereme W Gaeta, Alexander W Latzka, Stephen R CarpenterAbstract:Controlling invasive species can restore ecosystems while also quantifying species interaction strengths. We experimentally removed invasive rusty crayfish (Orconectes rusticus) from a Wisconsin la...
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fish predation and trapping for rusty crayfish Orconectes rusticus control a whole lake experiment
Canadian Journal of Fisheries and Aquatic Sciences, 2006Co-Authors: Catherine L Hein, Brian M Roth, Anthony R Ives, Jake Vander M ZandenAbstract:Improved methods are needed for the prevention and control of invasive species. We investigated the potential to control a rusty crayfish (Orconectes rusticus) population in an isolated lake in nor...
Adam Petrusek - One of the best experts on this subject based on the ideXlab platform.
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Czech Republic)
2015Co-Authors: Luboš Beran, Adam PetrusekAbstract:The American spiny-cheek crayfish Orconectes limosus (Rafinesque, 1817) was found in the Lipno Reser-voir in July 2006. This is the most southerly situated record of the species in the Czech Republic, and also the site with the highest altitude in the country (726 m a.s.l.). The nearest known site with the presence of this crayfish is approximately 100 km downstream the Vltava River; it is therefore likely that this species was actively introduced by humans. As various Czech populations of this invasive species, including those from the Vltava River, have been proven to carry the crayfish plague pathogen, the presence of O. limosus in the Bohemian Forest potentially poses a serious threat to the native crayfish, and its future spread should be monitored. Key words: Orconectes limosus, Lipno Reservoir, invasive species, crayfish plague, Czech Republi
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Spiny-cheek crayfish Orconectes limosus carry a novel genotype of the crayfish plague pathogen Aphanomyces astaci
Journal of invertebrate pathology, 2011Co-Authors: E. Kozubíková, Sirpa Heinikainen, Satu Viljamaa-dirks, Adam PetrusekAbstract:The oomycete Aphanomyces astaci causes mass mortalities of European crayfish. Different species of North American crayfish, original hosts of this parasite, seem to carry different strains of A. astaci. So far, four distinct genotype groups have been recognised using Random Amplification of Polymorphic DNA (RAPD-PCR). We succeeded in isolating A. astaci from the spiny-cheek crayfish Orconectes limosus, a widespread invader in Europe, and confirmed that this species carries a novel A. astaci genotype. Improving knowledge on the diversity of this parasite may facilitate identification of genotypes in mass mortalities of European crayfish, thus tracing the sources of infection.
