Distribution of the gill parasite Discocotyle sagittata (Monogenea: Polyopisthocotylea) in parr of Atlantic salmon Salmo salar and sea trout S. trutta in Norwegian rivers

• Main Author: Tor Atle Mo
• Format: Article in Journal/Newspaper
• Language: English
• Published: Norwegian University of Science and Technology 2023
• Subjects: ectoparasite; occurrence; salmonids; Monogenea; distribution; Zoology; QL1-991; Norway; Atlantic salmon; Salmo salar
• Online Access: https://doaj.org/article/1cf3d4ea414a45a6aae8b98571aac13e

The monogenean gill parasite Discocotyle sagittata is reported from parr of Atlantic salmon Salmo salar and sea trout S. trutta in the anadromous part of 86 out of 223 Norwegian rivers. The prevalence in each river varied from 1.5% to 88.9%. This study has significantly increased our knowledge about the occurrence of this salmonid parasite in Norway. Most likely, D. sagittata has a much wider distribution all over the country and probably also occur in numerous inland lakes, rivers and streams.