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Journal für Ornithologie

, Volume 116, Issue 2, pp 207–212 | Cite as

Gonadenentwicklung beim Wellensittich,Melopsittacus undulatus unter verschiedenen Lichtbedingungen

  • Gunvor Pohl-Apel
  • Roland Sossinka
Article

Zusammenfassung

Bei domestizierten Wellensittichen wurde die Keimdrüsenreifung an jungen Männchen unter Langtag- und Kurztagbedingungen (LD 16:8 bzw. 8:16) verfolgt.

Im Alter von 3 1/2 bis 4 Monaten treten die ersten reifen Spermien auf. In der Kurztag-Gruppe scheint die Tendenz einer schwachen Entwicklungsverzögerung erkennbar.

Mit zunehmendem Alter vergrößert sich die anfangs geringe individuelle Variabilität erheblich.

Eine grundsätzliche fotoperiodische Steuerung bei der Gonadenentwicklung der Männchen kann nicht gefunden werden.

Die Ergebnisse werden diskutiert und mit Befunden bei anderen Arten verglichen.

Gonadal development in the budgerigar, under various light regimes

Summary

In domesticated strains of budgerigars the testicular maturation has been investigated under conditions of long and short daily photoperiods.

At the age of 3 1/2 to 4 months, first mature sperms appear. In the short-day-group, the trend of a weak retardation seems to be visible.

The small individual variability in the young rapidly increases in the older birds.

No general capacity for a photoperiodic response could be proved in the males.

The results are discussed and compared with corresponding data of other species.

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Copyright information

© Verlag der Deutschen Ornithologen-Gesellschaft 1975

Authors and Affiliations

  • Gunvor Pohl-Apel
    • 1
  • Roland Sossinka
    • 1
  1. 1.Lehrstuhl VerhaltensphysiologieUniversität Bielefeld48 Bielefeld 1

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