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what is the importance of ichthyofauna​

Sagot :

Chryzsieidn

Answer:

Ichthyofauna of the Sheksna traditionally was of a mixture of rheophilous species (pike, perch, roach, ide, ruffe, bleak, etc.) and limnophilous species coming from Lake Beloye. The first marked decrease in the number of species and their composition was observed in 1896 after the dam that separated Lake Beloye from the upper Volga basin was built, leading to the disappearance of Russian sturgeon, beluga, sterled and sazan.

An important structural component of lateral lagoons is the presence of large stands of aquatic macrophytes. The dominance of small-sized species of the ichthyofauna associated with these plants, as well as juveniles of larger ones, has been well documented in Brazil (Agostinho et al., 2002; Casatti et al., 2003; Pelicice and Agostinho, 2006).

Explanation:

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