Diurnal Rhythm of Schooling Behavior of Fishстатья
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Дата последнего поиска статьи во внешних источниках: 15 февраля 2024 г.
Аннотация:The diurnal rhythm of schooling behavior of fish closely correlates with changes in illumination and with the ability of individuals to use their vision for coordinated swimming. There is a threshold level of illumination, below which school contacts weaken (swimming velocity decreases, the distance between the nearest partners sharply increases, a uniform orientation is completely lost, swimming becomes multidirectional), fish disperse, a school disintegrates. The threshold level of illumination differs in fish of different species and different ages and shifts depending on changes in other external conditions. The breakup of a school occurs when the illumination is sufficient for the visual perception of partners in the school, but insufficient for fast and well-coordinated school reactions. The formation of a school in the morning hours requires higher illumination than for the evening breakup of the school. At night, schooling fish keep apart, reduce motor activity, can be motionless and lie on the ground.