Are endotherms emancipated?: some considerations on the cost of reproduction
Trillmich, FritzIn: Oecologia, Jg. 69 H. 4, S. 631-6331986The behavioral ecology of maternal effort in fur seals and sea lions
Trillmich, FritzIn: Behaviour, Jg. 114 H. 1, S. 3-201990Conservation problems on Galápagos: the showcase of evolution in danger
Trillmich, FritzIn: Die Naturwissenschaften, Jg. 79 H. 1, S. 1-61992Effects of the 1982/83 El Nino on Galápagos fur seals and sea lions
Trillmich, FritzIn: Noticias de Galápagos, Jg. 42, S. 22-231985Energetic limits to brood care: influences on fertility, and longterm fitness consequences
Trillmich, FritzIn: Verhandlungen der Deutschen Zoologischen Gesellschaft, Jg. 84, S. 79-871991Feeding territories and breeding success of South Polar skuas
Trillmich, FritzIn: The Auk, Jg. 95 H. 1, S. 23-331978The influence of separation on the pair bond in budgerigars (Melopsittacus undulatus; Aves, Psittacidae
Trillmich, FritzIn: Zeitschrift für Tierpsychologie, Jg. 41, S. 396-4081976Learning experiments on individual recognition in budgerigars (Melopsittacus undulatus)
Trillmich, FritzIn: Zeitschrift für Tierpsychologie, Jg. 41, S. 372-3951976Maternal investment and sex-allocation in the Galapagos fur seal, Arctocephalus galapagoensis
Trillmich, FritzIn: Behavioral Ecology and Sociobiology, Jg. 19 H. 3, S. 157-1641986Mutual mother-pup recognition in Galápagos fur seals and sea lions: cues used and functional significance
Trillmich, FritzIn: Behaviour, Jg. 78 H. 1, S. 21-421981Paarzusammenhalt beim Mäusebussard (Buteo buteo L.) im Winter
Trillmich, FritzIn: Die Vogelwelt, Jg. 86, S. 60-611965Recognition of the individual nesting box in budgerigars
Trillmich, FritzIn: Zeitschrift für Tierpsychologie, Jg. 42, S. 1-111976Spatial proximity and mate-specific behaviour in a flock of budgerigars (Melopsittacus undulatus; Aves, Psittacidae)
Trillmich, FritzIn: Zeitschrift für Tierpsychologie, Jg. 41, S. 307-3311976Influence of rare ecological events on pinniped social structure and population dynamics
Trillmich, Fritz ; Boyd, Ian L. (Hrsg.)1993El Nino: effects of environmental stress on pinniped populations
Trillmich, Fritz ; Breckle, Siegmar-Walter (Hrsg.)In: Stress - auf allen Ebenen, Jg. 6, S. 103 ff.1992The effects of El Nino on Galápagos pinnipeds
Trillmich, Fritz ; Dellinger, T. ; Trillmich, Fritz (Hrsg.)1991Senescence and costs of reproduction in the life history of a small precocial species
Trillmich, Fritz ; Geißler, Edda ; Günther, AnjaIn: Ecology and Evolution, Jg. 9 H. 12, S. 7069-70792019Attendance behavior of Galápagos fur seals
Trillmich, Fritz ; Gentry, Roger L. (Hrsg.) ; Kooyman, Gerald L. (Hrsg.)1986