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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10618 - Ecology

Projekt

<a href="/cs/project/LM2018099" target="_blank" >LM2018099: Jihočeské výzkumné centrum akvakultury a biodiverzity hydrocenóz</a><br>

Návaznosti

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

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Aquatic Sciences

ISSN

1015-1621

e-ISSN

1420-9055

Svazek periodika

85

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

13

Strana od-do

—

Kód UT WoS článku

000910838700001

EID výsledku v databázi Scopus

2-s2.0-85145675229