Erilised püügiviisid
Electro-fishing equipment is used for collecting different fish species and recording their relative
abundances, and making cursory determinations of their health based on external observations.
Collecting and recording fish data reveals what species are surviving and inhabiting a particular stream
system and to what extent the aquatic ecosystem is maintaining that population. Depending on the type
of stream visited and the field chemistry and habitat measurements taken, biologists have certain
expectations of what type of species they should expect to find. When this ends up not being the case,
as where warm water pollutant tolerant species are found in what would be considered cold water
species habitat, then the biologists look closer into possible causes for the ecological imbalance. When
combined with water chemistry, habitat, and stream invertebrate information, a clear picture of the
ecological system is brought in to focus fr...
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