Entomological ReviewEntomological ReviewЭнтомологическое обозрение0367-14453034-6177The Russian Academy of Sciences69383710.31857/S0367144525030015ArticlesСтатьиResearch ArticleCircadian rhythms of some behaviors of the cockroach Periplaneta americana L. (Blattodea, Blattidae) during ocelli shieldingСуточные ритмы некоторых форм поведения таракана Periplaneta americana L. (Blattodea, Blattidae) при экранировании оцеллейNovikovaE. S.НовиковаЕ. С.os_sacrum@list.ruPuytoA. A.ПуйтоА. А.puyto.a@mail.ruZhukovskayaM. I.ЖуковскаяМ. И.mzhukovskaya@rambler.ruInstitute of Evolutionary Physiology and Biochemistry of the Russian Academy of SciencesИнститут эволюционной физиологии и биохимии РАН150920251043NO (2025)9511119102025Copyright ©; 2025, Russian Academy of SciencesCopyright ©; 2025, Российская академия наук2025Russian Academy of SciencesРоссийская академия наукhttps://journals.eco-vector.com/0367-1445/article/view/693837

In cockroaches the main role in the adjustment of circadian rhythms is attributed to the compound eyes; at the same time, morphological data indicate a possible role of ocelli in the modulation of the biological clock. Data obtained in this study reveal the effect of shielding the ocelli with black dye on the speed of the rhythm shift and its amplitude. In addition, it is shown that sexual behavior, locomotor activity, shelter occupation, and sleep-like behavior expressed as freezings, have a pronounced rhythm with a single peak, and resting periods have two pronounced minima at the beginning and at the end of the dark phase. Light intensity during the day phase affects the amplitude of behavioral rhythms in a manner similar to ocelli shielding.

Известно, что у тараканов основную роль в подстройке суточных ритмов играют сложные глаза, однако морфологические данные указывают на возможную роль оцеллей в модуляции работы биологических часов. Данные настоящего исследования свидетельствуют о влиянии экранирования оцеллей черной краской на скорость подстройки суточного ритма к режиму освещения и на его выраженность у американского таракана Periplaneta americana. Кроме того, показано, что половое поведение, локомоторная активность, заходы в убежище и сноподобное поведение, выражающееся в замираниях, имеют выраженный ритм с одним пиком, а периоды покоя – два выраженных минимума в начале и конце темновой фазы. Интенсивность света в дневной фазе влияет на мощность ритмов поведения сходно с экранированием оцеллей.

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