Crayfish Predation on Tadpoles : A Comparison Between a Native (Austropotamobius Pallipes) and an Alien Species (Procambarus Clarkii).

Gherardi, Francesca; Renai, B.; Corti, Claudia

doi:10.1051/kmae:2001011

Cited by 62 publications

(49 citation statements)

References 22 publications

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“…According to previous reports on European crayfish (e.g., [7,13,14,19,33,35,50]), there is no evidence of differences between indigenous and the invasive crayfish species O. limosus studied here in feeding ecology and diet. However, invasive crayfish are, thanks to their life strategies, able to switch food sources faster and are usually able to out-compete native crayfish for food sources.…”

Section: Discussionsupporting

confidence: 54%

The diet of the spiny-cheek crayfish Orconectes limosus in the Czech Republic

2013

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The composition of the diet of the invasive spiny-cheek crayfish Orconectes limosus was studied using qualitative and quantitative analyses of stomach contents. A total of 368 specimens collected in 2003–2005 and 2008 in Czech localities were examined, predominantly from the Labe (Elbe) and Vltava River basins. Food components were compared for three size classes of crayfish and both sexes. The following conclusions were reached: (1) the spiny-cheek crayfish is an omnivorous species consuming plants, animals and detritus; (2) quantitatively, the main food component of O. limosus is detritus, while the plant component was second; (3) O. limosus may swallow whole food particles up to 4 mm in size, and the bodies of small animals may sometimes be found undamaged in their stomachs.

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Section: Discussionsupporting

confidence: 54%

The diet of the spiny-cheek crayfish Orconectes limosus in the Czech Republic

2013

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“…In fact, the red swamp crayfish has been found to exhibit properties of an r-selected species, including early maturity at small body size, rapid growth rate (Paglianti and Gherardi, 2004), and relatively short life span (Lindqvist and Huner, 1999). Because of its aggressiveness and predatory ability, it poses threats to native fauna (Gherardi et al, 2001;Renai and Gherardi, 2004). As a successful colonizer, crayfish may reduce biomass and species richness of macroinvertebrates, macrophytes, and periphyton, including drastic habitat changes with consequent decline of vertebrate and invertebrate taxa.…”

Section: Introductionmentioning

confidence: 99%

Genetic diversity among red swamp crayfish (Procambarus clarkii) populations in the middle and lower reaches of the Yangtze River based on AFLP markers

Zhu¹,

Huang²,

Dai³

et al. 2013

Genet. Mol. Res.

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ABSTRACT. The red swamp crayfish has become one of the most important freshwater aquaculture species in China. At present, although it is widely distributed in the middle and lower reaches of the Yangze River basin, little is known about its population genetics and geographic distribution in China. We estimated the genetic diversity among 6 crayfish populations from 4 lakes (Hongze Lake, Poyang Lake, Dongting Lake, and Yue Lake) using AFLPs. A total of 129 loci were generated with 5 EcoRI-MseI primer combinations and scored as binary data in 139 individuals. These data were analyzed by cluster methods with the NTSYSpc software package. The 6 populations were separated into 3 major clusters by principal coordinate analysis and cluster analysis. Among the 6 populations, the highest gene diversity was found within the Nanjing population. Analysis of molecular variance demonstrated that most variation occurred within populations (91.20%). The estimated average G ST value across all loci was 0.4186, suggesting (very) low gene flow among the different localities. We conclude that there is high genetic differentiation among crayfish in the middle and lower reaches of the Yangze River. This information will help in the selection of highquality individuals for artificial reproduction.

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“…Finally, because of its aggressiveness and predatory ability, it poses threats to the native fauna (e.g. amphibians, Gherardi et al, 2001;Renai & Gherardi, 2004), including endangered indigenous crayfish, such as the white-clawed crayfish, Austropotamobius pallipes (Lereboullet, 1858).…”

Section: Introductionmentioning

confidence: 99%

Structure and dynamics of an invasive population of the red swamp crayfish (Procambarus clarkii) in a Mediterranean wetland

Scalici

Gherardi

2007

Hydrobiologia

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This study analyzes the population structure and dynamics of an invasive population of Procambarus clarkii (Girard, 1852) in a Mediterranean wetland using the Bhattacharya's and Von Bertallanfy's analytical methods. The main purpose was to collect biological data necessary for the management of this nuisance species. A maximum of five age classes were identified for both sexes, three of which being composed of a few or zero individuals. Age classes were classified into two subgroups--spring (SpL) and summer (SuL) lines--on the basis of the different hatching periods. Individuals of SpL showed a faster growth rate and reached a larger body size than those belonging to SuL, probably because they were able to grow for a longer time. No between-sex differences were found in growth patterns except for the asymptotic length (L ¥ ), which was reached faster by the females. Other population properties were analyzed, such as a high mortality rate, a maximum longevity of 4 years, and a low mean life-time (<12 months). Finally, a relatively small fraction of individuals seemed to survive after the first reproductive peak in spring. Consequently, the structure and dynamics of the study population seem to reveal its stability and spreading potential, as a confirmation of the invasiveness of P. clarkii in Mediterranean wetlands.

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Crayfish Predation on Tadpoles : A Comparison Between a Native (Austropotamobius Pallipes) and an Alien Species (Procambarus Clarkii).

Cited by 62 publications

References 22 publications

The diet of the spiny-cheek crayfish Orconectes limosus in the Czech Republic

The diet of the spiny-cheek crayfish Orconectes limosus in the Czech Republic

Genetic diversity among red swamp crayfish (Procambarus clarkii) populations in the middle and lower reaches of the Yangtze River based on AFLP markers

Structure and dynamics of an invasive population of the red swamp crayfish (Procambarus clarkii) in a Mediterranean wetland

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