Mass aggregations of Bibio pomonae (Insecta: Diptera: Bibionidae), an indication of climate change?
Examination of stomach contents of the brown trout is a sensitive method to evaluate the animals occurring in a lake and its surroundings.Yearly test fishing from Lake Sandvatn at the Hardangervidda Mountain plateau in August has shown regular occurrence of Bibio pomonae in the brown trout stomachs every third year since 2001.The stomach fullness a