scholarly journals Agonism and shelter competition between invasive and indigenous crayfish species

2004 ◽  
Vol 82 (12) ◽  
pp. 1923-1932 ◽  
Author(s):  
Francesca Gherardi ◽  
William H Daniels
Keyword(s):  
Procambarus Clarkii ◽  
Reproductive Potential ◽  
Limited Resource ◽  
Indigenous Species ◽  
Laboratory Studies ◽  
Freshwater Biodiversity ◽  
Future Studies ◽  
Invasive Crayfish ◽  
Procambarus Acutus ◽  
Crayfish Species

Several crayfish species behave as biological invaders. Their establishment in an area has frequently been accompanied by the reduction or elimination of indigenous species. A laboratory study was designed to investigate whether the invasive crayfish Procambarus clarkii (Girard, 1852) is dominant over the indigenous (to Delaware) crayfish Procambarus acutus acutus (Girard, 1852) in either the absence or the presence of a shelter as a limited resource. As expected, we found that P. clarkii is more aggressive than the similarly sized P. a. acutus, thus confirming previous studies that demonstrated an inherent dominance of the invasive over the indigenous crayfish. We then hypothesized that species showing a lower preference for an offered shelter (P. clarkii) should be less motivated to defend it. To the contrary, in a competitive context P. clarkii excluded P. a. acutus from the shelter but did not use the resource. Caution must be used in extrapolating these laboratory studies to the field, and future studies should analyze multiple factors, including the autoecology of the two species and their reproductive potential and recruitment patterns. However, our results might help in highlighting the risks for freshwater biodiversity created by the uncontrolled translocations of P. clarkii and other similar invasive species.

scholarly journals First Detection of the Crayfish Plague Pathogen Aphanomyces astaci in Costa Rica: European Mistakes Should Not Be Repeated

2021 ◽  
Vol 9 ◽  
Author(s):  
Laura Martín-Torrijos ◽  
Angel Jose Correa-Villalona ◽  
Juan Carlos Azofeifa-Solano ◽  
Fresia Villalobos-Rojas ◽  
Ingo S. Wehrtmann ◽  
...  
Keyword(s):  
Costa Rica ◽  
Procambarus Clarkii ◽  
Freshwater Ecosystems ◽  
Future Research ◽  
Warning Sign ◽  
Aphanomyces Astaci ◽  
Molecular Approaches ◽  
Research Activities ◽  
Invasive Crayfish ◽  
Crayfish Species

The crayfish plague pathogen Aphanomyces astaci is one of the main factors responsible for the decline in European and Asian native crayfish species. This pathogen was transported to these regions through its natural carriers, North American crayfish species, which were introduced during the last century. Since then, the carrier species and the pathogen have spread worldwide due to globalization and the highly invasive nature of these species. In Europe, five carrier species have been categorized as high-risk as they are responsible for the loss of provisioning services, which endangers freshwater ecosystems. The red swamp crayfish Procambarus clarkii, in particular, is currently one of the most concerning species as its spread threatens crayfish biodiversity and freshwater ecosystems worldwide. In this study, we describe the first detection of A. astaci in an introduced population of P. clarkii in Central America, specifically in Costa Rica. Using molecular approaches, we analyzed 48 crayfish samples collected from Reservoir Cachí and detected the presence of A. astaci in four of these samples. The introduction of P. clarkii and the incorrect management of the species (related to its fishery and the commercialization of live specimens) over the past decades in Europe are mistakes that should not be repeated elsewhere. The detection of the pathogen is a warning sign about the dangerous impact that the introduction of this invasive crayfish may have, not only as a carrier of an emerging disease but also as a direct risk to the invaded ecosystems. Our results may serve to (1) assess current and future consequences, and (2) direct future research activities, such as determining the potential impacts of A. astaci on native decapod species, or on other introduced crayfish species that are used for aquaculture purposes, such as Cherax quadricarinatus.

scholarly journals Behavioral Responses to 'Alarm Odors' In Potentially Invasive and Non-invasive Crayfish Species from Aquaculture Ponds

Behaviour ◽  
2004 ◽  
Vol 141 (6) ◽  
pp. 691-702 ◽  
Author(s):  
William Daniels ◽  
Francesca Gherardi ◽  
Patrizia Acquistapace
Keyword(s):  
The Other ◽  
Control Phase ◽  
Food Odor ◽  
Non Invasive ◽  
Aquaculture Ponds ◽  
Invasive Crayfish ◽  
Food Odors ◽  
Conspecific Odors ◽  
Procambarus Acutus ◽  
Crayfish Species

AbstractTwo North American crayfish species, the Eastern white river crayfish, Procambarus acutus acutus, and the red swamp crayfish, P. clarkii, were studied in the laboratory for their responses to food odors and to cues released by injured conspecifics and heterospecifics. The two species differ in that only P. clarkii is known to behave as an invasive species. All the test individuals were collected from aquaculture research ponds, in which they had had no prior contact with the other species and predation risks, excluding cannibalism, were reduced. The experimental design consisted in subjecting 20 crayfish per species to (1) a 3-min control phase after the injection of 20 ml of water and (2) a 3-min test phase after the injection of 20 ml of one of three test solutions (food odor, conspecific odor plus food odor, heterospecific odor plus food odor). We found that the two species differ on one hand for their background behavior and on the other for the intensity and quality of their responses to the three types of cues. Firstly, P. clarkii appeared more active than P. acutus acutus during the control phase and responded in a stronger fashion to the injection of the solutions. Secondly, we recorded an increased locomotion in P. acutus acutus with food and heterospecific cues (by moving crayfish maximize the chance of finding food), but not with conspecific odors (by not moving, crayfish reduce their exposure to visual predators). To the contrary, at the injection of the three test solutions P. clarkii displayed clear feeding-related activities (although less intense with conspecific odors) as opposed to the danger reactions shown in a previous study on individuals from a naturalized population of the same species. This result suggests that crayfish reared in an environment where predation risks are reduced (e. g. in aquaculture ponds) may respond differently to cues that in other, more risky habitats inform of a danger.

Prevalence of the crayfish plague, Aphanomyces astaci Schikora, in alien crayfish species in Japan

2020 ◽  
Vol 25 (1) ◽  
pp. 31-37
Author(s):  
Kensuke Kamimura ◽  
Tadashi Kawai
Keyword(s):  
Water Temperature ◽  
Procambarus Clarkii ◽  
Severe Disease ◽  
Pacifastacus Leniusculus ◽  
Infection Prevalence ◽  
Infection Status ◽  
Aphanomyces Astaci ◽  
Invasive Crayfish ◽  
The Relationship ◽  
Crayfish Species

Abstract Crayfish plague is a severe disease of crayfish that is caused by the oomycete Aphanomyces astaci. Two crayfish hosts of this parasite, Procambarus clarkii and Pacifastacus leniusculus, were imported from North America into Japan and were found to be infected with this parasite. Since the endemic Japanese crayfish, Cambaroides japonicus, has a low resistance to the crayfish plague, infection with this parasite will likely lead to crayfish death. Specimens of both invasive crayfish species were collected across Japan and their infection status was examined using a PCR technique. Aphanomyces astaci was detected in all localities and the average infection prevalence was 67%. Additionally, when the signs of melanization were compared with the results from PCR analyses, it suggested that the DNA detection procedure is more reliable than observation of tissue melanization. Moreover, the relationship between prevalence and water temperature in the field was analyzed, indicated that water temperature influenced the prevalence of A. astaci infection.

scholarly journals High prevalence of multiple paternity in the invasive crayfish species, Procambarus clarkii

2010 ◽  
pp. 107-115 ◽  
Author(s):  
Gen Hua Yue ◽  
Jia Le Li ◽  
Chun Ming Wang ◽  
Jun Hong Xia ◽  
Gen Lin Wang ◽  
...  
Keyword(s):  
Procambarus Clarkii ◽  
Multiple Paternity ◽  
High Prevalence ◽  
Invasive Crayfish ◽  
Crayfish Species

scholarly journals Phenology of overland dispersal in the invasive crayfish Faxonius immunis (Hagen) at the Upper Rhine River area

2018 ◽  
pp. 30 ◽  
Author(s):  
Alexander Herrmann ◽  
Adam Schnabler ◽  
Andreas Martens
Keyword(s):  
Invasive Alien Species ◽  
Procambarus Clarkii ◽  
Regional Scale ◽  
River System ◽  
Rhine River ◽  
Aquatic Biodiversity ◽  
Invasive Crayfish ◽  
Citizen Science Project ◽  
Upper Rhine ◽  
Crayfish Species

The non-indigenous crayfish Faxonius immunis (Hagen) is the dominant crayfish species at the Upper Rhine River system since his detection in 1993. As an invasive alien species, it is one of the biggest threats to aquatic biodiversity in the area. By dispersing over land, the species has a high potential to colonize small ponds created for threatened amphibians and dragonflies. Shortly after invasion, the fast growing population of F. immunis is changing the habitat drastically. In June 2016, our team started a local information campaign including citizen science project where the local people south of Karlsruhe, Baden-Wuerttemberg, Germany, could contact us when they spot a crayfish migrating over land to assess the activity of overland dispersal on a regional scale. Until January 2018, we got a total of 98 responses. Thirty-nine include suitable information including 33 records of overland dispersal of F. immunis. The species was recorded on land throughout the year, except February and July. Additionally, single observations of overland dispersal of other invasive crayfish species, naming Procambarus clarkii (Girard), Pacifastacus leniusculus (Dana), Procambarus virginalis (Lyko) and Faxonius limosus (Rafinesque), were recorded.

scholarly journals Three crayfish species of different origin in a medium-sized river system: a new state of affairs

2021 ◽  
pp. 26
Author(s):  
Grzegorz Radtke ◽  
Rafał Bernaś ◽  
Piotr Dębowski ◽  
Dariusz Ulikowski ◽  
Andrzej Kapusta
Keyword(s):  
Fish Fauna ◽  
River System ◽  
Indigenous Species ◽  
Baltic Basin ◽  
Small Stream ◽  
Signal Crayfish ◽  
System A ◽  
Invasive Crayfish ◽  
Noble Crayfish ◽  
Crayfish Species

In view of contemporary changes in aquatic environments, determining the distribution of both native and emerging invasive crayfish species is increasingly important. In central Europe, the three invasive crayfish species of the signal crayfish Pacifastacus leniusculus (Dana, 1852), the spiny-cheek crayfish Faxonius limosus (Rafinesque, 1817) and the red swamp crayfish Procambarus clarki (Girard, 1852) are of North American origin. The spiny-cheek crayfish was first brought to the southern Baltic basin at the end of nineteenth century, and its expansion ensued rapidly. At the same time, the indigenous species of the noble crayfish Astacus astacus (Linnaeus, 1758) began to disappear. The spread of the signal crayfish started in the second half of twentieth century; however, it has progressed strongly in recent years. Latest studies of fish fauna in the Drwęca River system, a tributary of the lower Vistula River, have simultaneously revealed new information on the occurrence of crayfish. The most widespread was spiny-cheek crayfish found at ten sites throughout the river basin. The second alien species, the signal crayfish, was noted in four locations in the upper part of the river system, but no mixed populations were noted. A particularly valuable result of the study was the discovery of an unknown site of noble crayfish in a small stream.

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