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Definition of Term

diurnal migration
(english) The daily vertical movement of marine organisms usually between deeper water by day and the midwater or surface by night. (See also: diurnal, migration)
migration diurne
(french) Le mouvement vertical journalier des organismes marins habituellement entre eau plus profonde pendant la journée et la zone pélagique ou la surface d'eau pendant la nuit. (See also: diurnal, migration)
migração diurna
(portuguese) Movimento vertical diário de organismos marinhos usualmente entre águas profundas durante o dia e a meia água ou superfície á noite. (See also: diurnal, migration)

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