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In 1974 21 specimens and in 1978 another 73 specimens of the Gobi agama (Agama stoliczkana altaica) have been removed from a population, inhabiting the Daschvanžel granitian rock outcrop in the region of the Bulgan river (most remote southwestern district of the Mongolian People's Republic) in order to establish a new population of this species under somewhat different climatical conditions to the north of the Mongolian Altai mountains near the Chovd city in the plains of the great Westmongolian lakes on a granitian massiv of the Ulan‐ul mountains. The ecological (including climatical) conditions of the dispenser and the new population as well as the method of collecting and transporting the lizards are described. All animals of the second portion (73 specimens) have been measured and weigthed (8 of them are retained for museal collection). Using this data the population structure (sex ratio, groups of different age) has been estimated (Abb. 1). In the future the new population will be controled by the Mongolian zoologists.

In 1974 ZI specimens and in 1978 another 73 specimens of the Gobi agama (Aganza stoliqkaiza altaica) have been removed from a population, inhabiting the DaschvanBel granitian rock outcrop in the region of the Bulgan river (most remote southwestern district of the Mongotian People's Republic) in order to establish a new population of this species under somewhat different climatical conditions to the north of the Mongolian Altai mountains near the Chovd city in the plains of the great Westmongolian lakes on a granitian massiv of the Ulan-ul mountains. The ecological (including climatical) conditions of thedispenserand the newpopulation aswell as themethod of collecting and transporting the lizards are described. All animals of the second portion (73 specimens) have been measured and weigthed (8 of them are retained for museal collection). Using this data the population structure (sex ratio, groups of different age) has been estimated (Abb. I). In the future the new population will be controled by the Mongolian zoologists. EinleitungUmsiedlungen und experimentelle Neugrundungen von Reptilienpopulationen gehoren i m Unterschied zu den zahlreichen Akklimatisations-und Reakklimatisationsaktionen mit Saugetieren noch zu den Seltenheiten der zoologischen Praxis. Die Konzentration der erreichbaren insularen Restbestande von Croco&Zz/s rhombifer und C. accttlAs in einem farmartig gefuhrten Reservat in den Zapata-Sumpfen auf Cuba, die den endemischen C. rhonzbqer vor dem Artentod bewahrten, ist eines der wenigen bislang bekannten Beispiele fur solche Unternehmungen. Auch die Versuche, die stark dezimierten marinen Schildkroten (vor allem Lepidocbebs kernpi) entlang der mexikanischen und US-amerikanischen Golfkuste durch Einsammeln der verstreuten Gelege sowie kunstliche Zeitigung und Aufzucht der Jungtiere bis zu einem bestimmten Alter mit dem Ziel, an geeigneten Orten neue und ge-