Циркадні ритми бичка Пінчука ponticola Cephalargoides (Pinchuk, 1976) в лабораторних умовах
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2021
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Одеський національний університет імені І. І. Мечникова
Анотація
Вивчено циркадні ритми бичка Пінчука Ponticola cephalargoides (Pinchuk,
1976) в умовах лабораторного утримання. Проведено спостереження в умовах
природного освітлення та постійної темряви. Зроблено припущення, що у бичка Пінчука присутні як циркадні ритми, так і екзогенні добові ритми.
Introduction. Circadian rhythms help the body to anticipate changes in environmental conditions and adapt to the daily fluctuations of external factors. The presence of such mechanisms, which provide early preparation of the organism, gives an advantage in the struggle for survival. The dynamics of light is one of the main factors, which determines the level of growth, development, nutrition, metabolism, affects hormonal activity. Aim. The aim of the study was to study the circadian rhythms of motor activity of Pinchuk’s goby Ponticola cephalargoides (Pinchuk, 1976) in the laboratory. Methods. To study the activity of the fish individuals of the Pinchuk’s goby caught in the Gulf of Odesa on a fishing rod were selected. The experiments were performed in an aquarium with two lighting options – under natural light and in the complete round-the-clock absence of lighting. Measurements of the fish activity were recorded at 1 hour intervals for 5 days. Results. The study revealed that the activity in constant darkness is generally lower than in the natural light. In both cases, the maximum value of the motor activity occurs in the first half of the day. Under the natural light, the activity of the Pinchuk’s goby reaches the maximum value from 06:00 to 07:00, in constant darkness the activity reaches the maximum from 07:00 to 08:00. The difference in the activity of the fish between the two lighting modes is most noticeable from 16:00 to 22:00. Conclusion. It is established that the activity of Pinchuk’s goby is cyclical both under the natural light conditions and in the absence of light. From 00:00 to 16:00 Pinchuk’s goby has an endogenous circadian rhythm, from 16:00 to 22:30 the rhythm is exogenous.
Introduction. Circadian rhythms help the body to anticipate changes in environmental conditions and adapt to the daily fluctuations of external factors. The presence of such mechanisms, which provide early preparation of the organism, gives an advantage in the struggle for survival. The dynamics of light is one of the main factors, which determines the level of growth, development, nutrition, metabolism, affects hormonal activity. Aim. The aim of the study was to study the circadian rhythms of motor activity of Pinchuk’s goby Ponticola cephalargoides (Pinchuk, 1976) in the laboratory. Methods. To study the activity of the fish individuals of the Pinchuk’s goby caught in the Gulf of Odesa on a fishing rod were selected. The experiments were performed in an aquarium with two lighting options – under natural light and in the complete round-the-clock absence of lighting. Measurements of the fish activity were recorded at 1 hour intervals for 5 days. Results. The study revealed that the activity in constant darkness is generally lower than in the natural light. In both cases, the maximum value of the motor activity occurs in the first half of the day. Under the natural light, the activity of the Pinchuk’s goby reaches the maximum value from 06:00 to 07:00, in constant darkness the activity reaches the maximum from 07:00 to 08:00. The difference in the activity of the fish between the two lighting modes is most noticeable from 16:00 to 22:00. Conclusion. It is established that the activity of Pinchuk’s goby is cyclical both under the natural light conditions and in the absence of light. From 00:00 to 16:00 Pinchuk’s goby has an endogenous circadian rhythm, from 16:00 to 22:30 the rhythm is exogenous.
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Ponticola cephalargoides, циркадні ритми, рухова активність, Ponticola cephalargoides, циркадні ритми, рухова активність, Ponticola cephalargoides, circadian rhythms, motor activity
Бібліографічний опис
Вісник Одеського національного університету = Odesa National University Herald