Bottensedimentets betydelse för flodpärlmusslans föryngring – en metodutveckling

• Main Author: Ulvholt, Mikael
• Format: Others
• Language: Swedish
• Published: Högskolan Kristianstad, Institutionen för matematik och naturvetenskap 2005
• Subjects: Biology; Biologi
• Online Access: http://urn.kb.se/resolve?urn=urn:nbn:se:hkr:diva-3327

The freshwater pearl mussel Margaritifera margaritifera is an endangered species. To survive, the young mussels demand a fairly coarse bottom material containing an appropriate quantity of organic substrate to survive without suffocating. In order to estimate if a bottom is suitable for juvenile mussels, samples of the sediment are needed. To obtain samples a sampling device called the Mulv collector has been developed within this project. Bottom samples were collected from 18 stations in 4 south Swedish streams, Vramsån, Kling-storpsbäcken, Brönnestadsån and Bräkneån. No rejuvenation of the mussel was found at the stations containing more than 25% fine material.