austropotamobius italicus
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Author(s):  
Matilde Boschetti ◽  
Alessandro Culicchi ◽  
Monica Guerrini ◽  
Filippo Barbanera ◽  
Giulio Petroni

The white-clawed crayfish is a complex of species (Austropotamobius pallipes plus A. italicus, Crustacea) pivotal to riverine environments. Regrettably, it is endangered in many European countries due to a recent massive decline. We carried out a fine-scale survey on white-clawed crayfish distribution, morphology and genetics in an under-investigated region of central Italy (Lunigiana, Tuscany) to improve local knowledge and aid conservation management of the species. The torrential fauna of Lunigiana is scarcely known and habitat alterations due to the anthropic exploitation of the territory represent a potential threat to its persistence. We investigated crayfish occurrence in eight streams of the Magra River Basin. We performed nocturnal and diurnal transects, took morphometric measurements, collected samples for genetic analysis and checked for the occurrence of ectosymbionts. Crayfish were disclosed in two streams (Civasola, Verdesina). Morphometric and phylogenetic analysis (mtDNA COI gene Bayesian tree reconstruction) concurrently identified both populations as Austropotamobius italicus carinthiacus. In the Verdesina stream, crayfish were heavily infested by branchiobdellidans (Annelida). Verdesina crayfish were also significantly smaller than those found in the Civasola stream, where branchiobdellidans were absent. Hence, we hypothesized that such difference in size might be related to the high density of ectosymbionts. In the light of habitat features and of data herein provided, we propose that both Civasola and Verdesina streams should be considered as “natural ark sites” for A. italicus, with the Magra River Basin representing a regional stronghold for the conservation of the species.


2016 ◽  
Vol 16 (4) ◽  
pp. 715-717 ◽  
Author(s):  
Miguel Clavero ◽  
Alejandro Centeno-Cuadros

2015 ◽  
Vol 17 (1) ◽  
pp. 141-154 ◽  
Author(s):  
Guido Bernini ◽  
Adriana Bellati ◽  
Irene Pellegrino ◽  
Alessandro Negri ◽  
Daniela Ghia ◽  
...  

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Beatriz Matallanas ◽  
Carmen Callejas ◽  
M. Dolores Ochando

Spanish freshwater ecosystems are suffering great modification and some macroinvertebrates likeAustropotamobius italicus, the white-clawed crayfish, are threatened. This species was once widely distributed in Spain, but its populations have shown a very strong decline over the last thirty years, due to different factors. Three Spanish populations of this crayfish—from different scenarios—were analysed with nuclear (microsatellites) and mitochondrial markers (COIand16S rDNA). Data analyses reveal the existence of four haplotypes at mitochondrial level and polymorphism for four microsatellite loci. Despite this genetic variability, bottlenecks were detected in the two natural Spanish populations tested. In addition, the distribution of the mitochondrial haplotypes and SSR alleles show a similar geographic pattern and the genetic differentiation between these samples is mainly due to genetic drift. Given the current risk status of the species across its range, this diversity offers some hope for the species from a management point of view.


Behaviour ◽  
2009 ◽  
Vol 146 (1) ◽  
pp. 45-68 ◽  
Author(s):  
Pietro Angelo Nardi ◽  
Elisa Altobelli ◽  
Paolo Galeotti ◽  
Fabio Pupin ◽  
Roberto Sacchi ◽  
...  

Author(s):  
Silvia Bertocchi ◽  
Sara Brusconi ◽  
Francesca Gherardi ◽  
Frédéric Grandjean ◽  
Catherine Souty-Grosset

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