![Andreas MARTENS | Director | Prof. Dr | Pädagogische Hochschule Karlsruhe, Karlsruhe | Department of Biology | Research profile Andreas MARTENS | Director | Prof. Dr | Pädagogische Hochschule Karlsruhe, Karlsruhe | Department of Biology | Research profile](https://i1.rgstatic.net/ii/profile.image/322993903865856-1454019155583_Q512/Andreas-Martens.jpg)
Andreas MARTENS | Director | Prof. Dr | Pädagogische Hochschule Karlsruhe, Karlsruhe | Department of Biology | Research profile
![31 May 2021, Baden-Wuerttemberg, Rheinstetten: Biology professor Andreas Martens from the Karlsruhe University of Education (PH) is standing by a pond called "Milk Coffee" and holding a live calico crayfish. In the 31 May 2021, Baden-Wuerttemberg, Rheinstetten: Biology professor Andreas Martens from the Karlsruhe University of Education (PH) is standing by a pond called "Milk Coffee" and holding a live calico crayfish. In the](https://c8.alamy.com/comp/2G18PW3/31-may-2021-baden-wuerttemberg-rheinstetten-biology-professor-andreas-martens-from-the-karlsruhe-university-of-education-ph-is-standing-by-a-pond-called-milk-coffee-and-holding-a-live-calico-crayfish-in-the-meantime-the-crayfish-has-almost-been-driven-out-of-the-pond-the-introduced-calico-crayfish-have-become-a-threat-to-water-bodies-in-the-southwest-as-far-as-the-palatinate-and-hesse-however-it-is-possible-to-save-dying-ponds-and-pools-and-displace-the-crayfish-this-has-been-shown-by-a-karlsruhe-research-project-to-dpa-life-in-the-pond-again-measures-against-potash-crayfish-2G18PW3.jpg)
31 May 2021, Baden-Wuerttemberg, Rheinstetten: Biology professor Andreas Martens from the Karlsruhe University of Education (PH) is standing by a pond called "Milk Coffee" and holding a live calico crayfish. In the
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