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On each group it soon becomes evident a hierarchy, achieved and maintained through clashes and duels between fish, but merely between opponents of the same gender.
After an initial belligerence, following the pecking order establishment, females rarely wrestle again. Also confrontations between males will become slowly reduced after succeeding the set of clear dominance. Only than, the belligerency among males is gradually reduced to a few persecutions from the “ alpha “ male, and his next partners, to subjugated individuals, more close to the “ omega” male. From time to time there are still some occasional disputes going on.
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Davvero interessante il fatto della gerarchia... non pensavo che nei Poecilidi potesse esserci un comportamento sociale di questo tipo...