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Table 2 Statistically significance of increases or decreases in numbers over the entire observation period

From: 34 years of investigation in the Rhine River at Ludwigshafen, Germany – trends in Rhine fish populations

Fish species

Statistically increased over observation period

Statistically decreased over observation period

Aspius aspius

yes

no

Barbus barbus

yes

no

Chondrostoma nasus

yes

no

Esox lucius

no

yes

Gymnocephalus cernua

yes

no

Lepomis gibbosus

yes

no

Leuciscus cephalus

yes

no

Leuciscus leuciscus

yes

no

Silurus glanis

yes

no

  1. Wald Chi Square test (logistic regression) with Significance level of 5%.