A model of co-occurrence: segregation and aggregation patterns in the mycoflora of the crayfish Procambarus clarkii in Lake Trasimeno (central Italy)

Abstract

Although attention on crayfish diseases has recently proliferated, the focus is mainly on a single host-parasite relationship rather than analyzing the entire mycoflora, probably due to the fact that (1)

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“…Growth model obtained by electronic length frequency analysis (ELEFAN), distinguished by sex, the histograms represent the distribution of the lengths of the crayfish samples; the curve represent the VBGF model for each size class. seasonal trend in the capture rates, as already observed in other studies (Anastácio et al, 2009;Chucholl, 2011;Dörr et al, 2012;Fidalgo et al, 2001;Gherardi et al, 2000;Scalici et al, 2010). In Preola Lake, the IDW-GIS analysis evidenced heterogeneous catch rates between areas near and far from the shore and between sexes and sampling sessions (Fig.…”

Eroded swimmeret syndrome in female crayfish Pacifastacus leniusculus associated with Aphanomyces astaci and Fusarium spp. infections

“…and Fusarium sp. The latter was isolated from the melanised remains of the swimmerets and, based also on other studies (Alderman & Polglase 1985, Chinain & Vey 1988, Vey 1988, Edgerton et al 2002, Quaglio et al 2006, Makkonen et al 2010, Dörr et al 2012, would be the main candidate for consideration as the ESS disease agent.…”

The freshwater grass shrimpPalaemonetes antennariusin the diet of fish in Lake Bracciano (Central Italy)

“…This 'centrality' makes P. antennarius a more imperiled taxon if we also consider the introduction and spreading of both alien invertebrates and fish species as potential competitors and/or predators This may be the case for very stressed areas such as in central Italy where diverse invasive crayfish (Chiesa et al, 2006;Nonnis et al, 2009;Scalici et al, 2010Scalici et al, , 2009bScalici et al, , 2009cDörr and Scalici, 2013;Bissattini et al, accepted) and their unsafe parasites (Dörr et al, 2011(Dörr et al, , 2012a(Dörr et al, , 2012bChiesa et al, 2015) were recorded and described. Scientists are often expected to indicate the most important species which disturbance may originate the main detrimental effect on both occurrence and abundance of other taxa in a community (Jones et al, 1994).…”