PERNECKER, Bálint, Attila CZIROK, Péter MAUCHART, Pál BODA, Arnold MÓRA and Zoltán Szabolcs CSABAI. No experimental evidence for vector-free, long-range, upstream dispersal of adult Asian clams [Corbicula fluminea (Müller, 1774)]. Biological Invasions. Springer, 2021, vol. 23, No 5, p. 1393-1404. ISSN 1387-3547. doi:10.1007/s10530-020-02446-8.
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Basic information
Original name No experimental evidence for vector-free, long-range, upstream dispersal of adult Asian clams [Corbicula fluminea (Müller, 1774)]
Authors PERNECKER, Bálint (348 Hungary, guarantor), Attila CZIROK (348 Hungary), Péter MAUCHART (348 Hungary), Pál BODA (348 Hungary), Arnold MÓRA (348 Hungary) and Zoltán Szabolcs CSABAI (348 Hungary, belonging to the institution).
Edition Biological Invasions, Springer, 2021, 1387-3547.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10618 Ecology
Country of publisher Netherlands
Confidentiality degree is not subject to a state or trade secret
Impact factor Impact factor: 3.605
RIV identification code RIV/00216224:14310/21:00120945
Organization unit Faculty of Science
UT WoS 000606206700001
Keywords in English Invasive species; Pedal movemen; Artificial stream system; Laboratory experiment; Field observation
Tags rivok
Tags International impact, Reviewed
Changed by Changed by: Mgr. Marie Šípková, DiS., učo 437722. Changed: 27/4/2021 15:16.
The Asian clam (Corbicula fluminea) is one of the rapidly spreading, very successful aquatic invasive species, which has become established widely in many parts of the world. Its spread is assumed to be by both passive and active dispersal. However, the importance of active pedal movement in dispersal is hardly known. Since there was no direct evidence of this phenomenon, field observations were combined with laboratory experiments to find out if the clams move upstream actively, and how this is affected by the quality of the substrate, the density of the clams, and the water velocity. Field observations were conducted at a small watercourse with no waterborne transport. Experiments were done in an indoor artificial stream system, where the distances moved by adult clams were measured via digital image analysis. Substrate grain size, starting density of clams, and water velocity significantly affected clam movement. Fine grain sediment and slow flow velocity both facilitated spread, while there was no clear pattern of density-dependent dispersal. Also, we found no clear preference for either upstream or downstream movement. The maximum distance moved in the lab experiments predicts no more than 0.15 km/y active pedal movement in an upstream direction, while our field observations detected a much faster (0.5–11 km/y) upstream movement, which might be explained by passive dispersal, such as via human transport and ecto- or endozoochory. Overall, it seems that active movement of the species cannot read to long-distance migration.
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