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DNA-based monitoring of the alien invasive North American crayfish Procambarus

Tijdschriftbijdrage - Tijdschriftartikel

In 2013 the red swamp crayfish (Procambarus clarkii) was introduced in Lake Yahuarcocha, a tropical, high altitude lake located in the Andes of northern Ecuador. Abundance of this alien invasive species has increased to such extent that it is disturbing the autochthonous aquatic ecosystem. Little is known about its distribution throughout Ecuador. Monitoring is therefore important to assess the current distribution and to control future spread. A molecular method based on environmental DNA (eDNA) was developed and used to assess the distribution of the red swamp crayfish at 21 sites in Lake Yahuarcocha, and three sites each at Lake Mojanda and San Pablo in the Ecuadorian highlands. The molecular crayfish identifications of the water samples were compared to catch-based distribution patterns obtained from traditional trapping. Results showed an eDNA detection accuracy of 86% from water samples, without any false positives. The results indicate that this budget-friendly method is easy to use and can provide important information on the occurrence of alien species in the tropics.
Tijdschrift: Limnologica
ISSN: 0075-9511
Volume: 70
Pagina's: 20 - 25
Jaar van publicatie:2018
BOF-keylabel:ja
IOF-keylabel:ja
BOF-publication weight:1
CSS-citation score:1
Auteurs:International
Authors from:Government, Higher Education