Oamenii de ştiinţă de la Universitatea Chicago din SUA au demonstrat după ce au întreprins un studiu că delfinii sunt capabili să îşi reamintească de confraţii lor chiar şi după o desparţire de 20 de ani, acest lucru făcându-i animalele cu cea mai lunga memorie sociala inregistrata vreodata.
Studiul a fost realizat cu ajutorul a 43 de delfini din şase parcuri acvatice şi s-a bazat pe recunoaşterea pe termen lung de către delfini a “semnăturii” lor personale, o fluierătură caracteristică. În timpul studiului delfinii au ascultat astfel de fluierături ale semenilor, reacţionând mai puternic atunci când ascultau fluierături care le erau familiare.
Oamenii de ştiinţă cred că delfinii prezintă un nivel de recunoaştere “comparabil cu memoria socială a oamenilor”.
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