Crayfish in central and southern Ukraine with special focus on populations of indigenous crayfish Astacus pachypus (Rathke, 1837) and their conservation needs

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12520%2F18%3A43896906" target="_blank" >RIV/60076658:12520/18:43896906 - isvavai.cz</a>

Result on the web

<a href="http://onlinelibrary.wiley.com/doi/10.1002/aqc.2798/full" target="_blank" >http://onlinelibrary.wiley.com/doi/10.1002/aqc.2798/full</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/aqc.2798" target="_blank" >10.1002/aqc.2798</a>

Result language

angličtina

Original language name

Crayfish in central and southern Ukraine with special focus on populations of indigenous crayfish Astacus pachypus (Rathke, 1837) and their conservation needs

Original language description

The thick-clawed crayfish (Astacus pachypus Rathke, 1837) is the least studied indigenous crayfish species in Europe. Information about its distribution and biology is out of date by more than 15years. This study identified 94 localities with potential occurrence of thick-clawed crayfish in eight southern and central regions of Ukraine, using questionnaire and literature analysis. Based on the information obtained, a field survey was conducted to examine and confirm the current distribution and abundance of crayfish species and evaluate basic water quality and habitat characteristics in each locality. Details of density, sex ratio in the catches, health and moulting condition, threat level and water quality were identified for each population of A. pachypus. Only four populations of this species were found, in lower parts of the Dnieper River, co-occurring with Astacus leptodactylus Eschscholtz, in Kakhovka reservoir near Vesele village, two sites on the Dnieper River near Nova Kakhovka town and near Prydniprovske village, and one locality on the Dnieper&apos;s tributary - the Ingulec River near Sadove village. Populations of thick-clawed crayfish at three sites had low crayfish densities of 0.3-0.4 crayfish m(-2) or catch efficiency 0.2 crayfish per trap night. Only one locality on the Dnieper River, close to Nova Khakovka, had a stronger population with higher density (1.7 crayfish m(-2)). Healthy thick-clawed crayfish inhabit larger water bodies with stable environments and good water quality. Female catch per unit effort was lower, and they had a higher percentage of chelae injuries compared with males. All of the identified thick-clawed crayfish populations are exploited by uncontrolled fishing for consumption and there is an urgent need for conservation of both the crayfish and their habitat.

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

10613 - Zoology

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2018

Confidentiality

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

Name of the periodical

Aquatic Conservation: Marine and Freshwater Ecosystems

ISSN

1052-7613

e-ISSN

—

Volume of the periodical

28

Issue of the periodical within the volume

1

Country of publishing house

US - UNITED STATES

Number of pages

11

Pages from-to

6-16

UT code for WoS article

000425121900002

EID of the result in the Scopus database

2-s2.0-85023614215