Signal crayfish as a threat for European ectosymbionts: overlooked biodiversity losses

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12520%2F23%3A43906217" target="_blank" >RIV/60076658:12520/23:43906217 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1007/s00027-022-00932-w" target="_blank" >https://doi.org/10.1007/s00027-022-00932-w</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00027-022-00932-w" target="_blank" >10.1007/s00027-022-00932-w</a>

Result language

angličtina

Original language name

Signal crayfish as a threat for European ectosymbionts: overlooked biodiversity losses

Original language description

The decline of native crayfish biodiversity caused by introductions of invasive crayfish has been well documented; however, the fate of their associated biota remains overlooked. Native European branchiobdellids (Annelida: Clitellata)-crayfish ectosymbionts-were monitored in Czech Republic in three localities with past or present sympatric occurrence of the native noble crayfish Astacus astacus (AA) and invasive signal crayfish Pacifastacus leniusculus (PL). No branchiobdellids were detected in two localities with abundant populations of PL but with absences of AA, although they were recently recorded there. Two species of branchiobdellids (Branchiobdella parasita and B. pentadonta) were detected on both crayfish species in the locality where AA still coexists with PL. However, PL harboured a significantly lower abundance of both branchiobdellids than AA (80.7% and 90.8% decrease, respectively) and a significantly lower number of their attached cocoons (95.7% and 95.0% decrease, respectively). Nevertheless, the abundance of branchiobdellids was positively correlated with the carapace length in both crayfish species. Other potential predictors related to crayfish biological parameters (e.g. sex or missing appendages) were not significantly related to the abundances of both branchiobdellids and their cocoons. We also performed laboratory experiments with both branchiobdellids distributed on size-matched individuals of AA and PL to verify the results of field observations. The probability for branchiobdellid survival was significantly higher on AA in both branchiodellids for all the time of the experiments. The absence or decreased abundances of the native branchiobdellids in the invasive crayfish suggest their limited capability to deal with the replacement of host species.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10618 - Ecology

Project

<a href="/en/project/LM2018099" target="_blank" >LM2018099: South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Aquatic Sciences

ISSN

1015-1621

e-ISSN

1420-9055

Volume of the periodical

85

Issue of the periodical within the volume

1

Country of publishing house

CH - SWITZERLAND

Number of pages

13

Pages from-to

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UT code for WoS article

000910838700001

EID of the result in the Scopus database

2-s2.0-85145675229