5 resultados para Motor cortex

em Aquatic Commons


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(PDF contains 7 pages.)

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The river perch (Perca fluviatilis L.) is most active in the daytime hours, and displays seasonal changes of diel rhythm with a break of the rhythm in spring and autumn. In the present work data were obtained on the motor activity of 3 perch measuring l8-20 cm, caught by net in the littoral of a reservoir and spawned under laboratory conditions. The degree of intensity of movement of perch was judged by special experiments. The results are summarised in this short paper.

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A man on a white motor boat called "Constance" in North West England, UK. This photo is part of a Photo Album that includes pictures from 1935 to 1954.