ENVIRONMENTAL FACTORS AFFECTING DAILY FORAGHG ACTIVITY OF THE ANT <i>CATAGLYPHIS IBERICA (EM.) (HYM.: FORMICIDAE)</i>

Authors

  • X. Cerdá
  • J. Retana
Keywords: ant, <i>Cataglyphis iberica</i>, foraging activity, environmental factors, thermophic

Abstract

Daily foraging activity of the desert ant Cataglyphis iberica and its relationship with some environmental factors (ground temperature at different levels, air temperature, relative humidity, light intensity) were studied in Bellaterra (Barcelona, NE Spain) during the summer of 1983. This is a strictly diurnal and highly thermophilic species: ground surface temperature is the environmental factor that is best correlated with foraging activity (R = 0.727), and greatest activity takes place at midday, when the temperature is maximum. This species, which nests in and zones, begins foraging activity when the outside temperature rises above 30 ºC, while the upper thermal limit has not been found at the study site (where the highest temperature registered was 51 ºC). Light intensity also influences C. iberica foraging activity, and its effect seems to be greatest in the hottest days. Rain stops the exits of foragers completely. Two multiple regression equations (the first one with al1 summer data and the other only with data of the hottest days) have been obtained in order to describe foraging activity of the species as a function of environmental factors. Ground surface temperature and light intensity are included in both equations, but their relative irnportance is different in each one of them.

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Author Biographies

X. Cerdá

C.I.D. (C.S.I.C.)

J. Retana

CREAF Universidad Autónoma de Barcelona
How to Cite
Cerdá, X., & Retana, J. (1989). ENVIRONMENTAL FACTORS AFFECTING DAILY FORAGHG ACTIVITY OF THE ANT <i>CATAGLYPHIS IBERICA (EM.) (HYM.: FORMICIDAE)</i>. Anales de Biología, (15), 75–82. Retrieved from https://revistas.um.es/analesbio/article/view/34621
Issue
Section
Biología animal