Ontogenetic changes in food intake and digestion rate of the herbivorous marine iguana (Amblyrhynchus cristatus, Bell)
In: Oecologia, Jg. 94 H. 3, S. 373-3791993
Paarzusammenhalt beim Mäusebussard (Buteo buteo L.) im Winter
In: Die Vogelwelt, Jg. 86, S. 60-611965Recognition of the individual nesting box in budgerigars
In: Zeitschrift für Tierpsychologie, Jg. 42, S. 1-111976Spatial proximity and mate-specific behaviour in a flock of budgerigars (Melopsittacus undulatus; Aves, Psittacidae)
In: Zeitschrift für Tierpsychologie, Jg. 41, S. 307-3311976Temperature regulation and microhabitat choice by free-ranging Galapagos fur seal pups (Arctocephalus galapagoensis)
In: Oecologia, Jg. 69 H. 1, S. 53-591986Time budget in Galápagos fur seal pups: the influence of the mother's presence and absence on pup activity and play
In: Behaviour, Jg. 92, S. 302-3211985