ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
Collection
Publisher
Years
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Insectes sociaux 18 (1971), S. 215-226 
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Summary 1. During late spring and most of the summer season the ant,Messor aegyptiacus was active during two foraging periods one in the morning and the second in the evening. During late summer and beginning of the fall it was active only in the morning. 2. The morning foraging activity began before sun-rise about 6.00 a.m. and stopped at about 10.00 a.m. and it was confined to harvesting. The evening activity started at about 6.00 p.m. and came to an end nearly at sun-set. Cleaning the nest of wastes usually occurred in this period. 3. During the morning foraging period there were two peaks of activity one took place in May and the second in August and the level of foraging activity was most high in August. A true evening foraging activity occurred during May and June and there was only one peak of field activity in June. 4. Seeds and fragments of plant leaves and stems formed the main food supply of this ant. 5. The temperature, relative humidity and light intensity showed a remarkable effect on the morning start and evening stop of foraging. Both the wind velocity and cloud cover, within the ranges obtained, did not influence the rate of field activity.
    Notes: Résumé 1. Durant la fin du printemps et la plus grande partie de l'été la fourmiMessor aegyptiacus Emery est active pendant deux périodes de récolte, l'une pendant le matin et l'autre pendant le soir. Durant la fin de l'été et le début de l'automne, elle est active uniquement pendant le matin. 2. L'activité de récolte matinale commence avant le lever du soleil vers 6 h et finit vers 10 h du matin; elle est entièrement consacrée à la récolte. Tandis qu'elle nettoie le nid pendant la récolte du soir qui commence vers 6 h après-midi et se termine au coucher du soleil. 3. Durant l'activité matinale il y avait deux maximums, l'un en mai et l'autre en août, celui-ci étant plus élevé. Pendant la récolte du soir, ayant lieu en mai et juin, il n'y avait qu'un seul maximum. 4. Les grains et les restes des feuilles et de trones des plantes constituent l'aliment principal de cette fourmi. 5. La température, l'humidité relative et l'intensité de la lumière ont un effet remarquable sur le commencement et la fin de la récolte. La vitesse du vent et les nuages n'ont eu aucune influence sensible sur cette activité durant nos observations.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Insectes sociaux 10 (1963), S. 83-89 
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Deux expériences ont été faites pour déterminer l'influence du rythme lunaire sur l'activité de butinage deCamponotus maculatus ægyptiacus Emery dans la région du Caire. Dans la première expérience, le nombre des fournis entrant et sortant a été observé la nuit pendant 6 périodes de 30 minutes, à des intervalles d'une semaine, de mai à octobre 1961. Dans les six mois lunaires étudiés, des nombres maximums de fourmis butineuses furent observés pendant 3 mois, à l'époque de la nouvelle lune, pendant 2 mois dans la période du dernier quartier, et pendant 1 mois à l'époque de la pleine lune. Dans la seconde expérience, le nombre de fourmis butineuses a été observé pendant 11 périodes de 15 minutes chaque nuit, à des intervalles d'un jour en juin et juillet 1962. Sur les 31 nuits de l'expérience, 18 ont révélé un degré supérieur d'activité en l'absence de clair de lune, et 9 nuits ont révélé un degré supérieur d'activité en présence de clair de lune. Il y avait 2 nuits presque de pleine lune et 2 presque sans lune. La différence entre le nombre moyen de fourmis butineuses dans la phase de la pleine lune et la phase sans lune (exp. I) et la différence entre le nombre moyen d'ouvrières butineuses au clair de lune et en l'absence de clair de lune (exp. 2) étaient statistiquement insignifiantes. Ceci montre que le rythme lunaire n'a pas eu plus d'influence sur l'activité de butinage deCamponotus maculatus ægyptiacus Emery.
    Notes: Summary Two experiments were carried out to investigate the influence of lunar rhythm on the foraging activity ofCamponotus maculatus ægyptiacus Emery in the district of Cairo. In the first experiment the number of the outgoing and incoming ants were recorded during 6-thirty minute periods per night at weekly intervals from May to October 1961. Of the six lunar months analysed maximum numbers of foragers were recorded in 3 months in the new moon period, in 2 months in the last quarter period and in one month in the full moon period. In the second experiment the number of foraging ants were counted during 11-fifteen minute periods per night at daily intervals in June and July 1962. Of the 31 nights of investigation 18 nights showed a higher level of activity in the absence of moonlight and 9 nights showed a higher activity in the presence of moonlight. Two nights were almost of full moon and two were almost of no moon. Both the difference between the mean number of foragers of the full moon phase and that of the no moon phase (Exp. 1) and the difference between the mean numbers of workers foraging in moonlight and those foraging in absence of moonlight (Exp. 2) were statistically non-significant. This indicates that the lunar rhythm has any or very slight effect on the foraging activity ofCamponotus maculatus ægyptiacus Emery.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 1432-234X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary It is to be concluded that the nocturnal ant C. maculatus aegyptiacus Emery starts foraging with the sun-set and its field activities are stopped with the sun-rise. The level of foraging activity showed two peaks at 1–3 hours after evening start and before morning stop. The differences in temperature and relative humidity at evening initiation and morning cessation of foraging activities suggest that both temperature and relative humidity have a marked effect on the evening start and morning stop of field activities. Although the atmospheric pressure, wind velocity and dew may have affected the rate of trail activity they appeared to have, within the ranges obtained, a very slight influence upon the evening start or morning stop of foraging activity. Cloud cover is not involved in the evening initiation or morning cessation of trail activity since it happened that the sky was almost always very clear at both evenings and mornings of all the nights of investigation from May to October but, the probability that the rate of nocturnal foraging activity of C. maculatus aegyptiacus might be affected by the cloud cover through the reduction of the moonlight exists. It is hoped to examine this in more detail at a later date.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...