Fish Identification Articles & Analysis
2 articles found
Why do we care about Microthrix filaments? Usually, Microthrix parvicella is associated with foaming problems in wastewater treatment. Sometimes we have observed high levels of what looks like M. parvicella in a sample of mixed liquor, and though the plant may be experiencing bulking, they do not have any foam. Even more confusing is when this occurs in summer, since M. parvicella is ...
The aim of the study was to investigate if scale morphology could be used to discriminate fish populations at a local scale. To this aim, 168 rostrum dace (Leuciscus leuciscus burdigalensis) were collected at 3 sites in the River Viaur (SW France), distributed along 82 Km of stream. Seventy-one measurements were taken from scales: 2 shape factors and 69 Fourier coefficients. A stepwise ...