Not all the fish from the river came from here.
Sunshine tells an introduction story.
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Sunshine, Lepomis gibbosus, is originally from North America. The Interpretation Center of the River of Águeda describes it as an exotic species, of high body and flattened laterally, which lives in still waters but also in rivers. In breeding season, males may hinder access by juveniles of native species to the shore shelters. It was registered in Cavez in 2016–2017; this record does not measure its local impact.
The bluish bands from the head to the flanks and a dark spot on the tip of the pearl are part of the description. In juveniles, the pattern is simpler, on a greenish or olivaceous background. Age also changes appearance.
The menu includes insects, crustaceans, sea snails, and fish larvae. This diversity helps to realize that food is not limited to a single prey. The chart also distinguishes lentic environments, such as albufeiras, from exotic environments, such as rivers and streams: the species can use both. The geographical origin, presence in a survey and the effect on other species are different information.
The same river, different ways of living
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A fish menu also has insects →Return to the six species of the survey
Six species under the surface →How to assess the life of a river
The life of the river also tells a story →
Source and context
Águeda River Interpretation Center — Sun Loss
Accessed:
Editorial summary; the date of consultation is not the date of the facts.