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The dulog system originates from a system developed as a German university research project which has been well tested in various studies with bats. Publications from these studies are listed below. As the spin-off and rebranding to dulog happened only recently, publications from 2020 and earlier don’t name the system dulog yet but use the same technology in earlier iterations.

Additional studies with the dulog system already have been conducted, but are not published yet. We will update this page, as soon as the publications become available.


Ripperger SP, Stockmaier B, Carter G. Tracking sickness effects on social encounters via continuous proximity-sensing in wild vampire bats. Behavioral Ecology

Ripperger SP, Carter GC, Page RA, Duda N, Koelpin A, Weigel R, Hartmann M, Nowak T, Thielecke J, Schadhauser M, Robert J, Herbst S, Meyer-Wegener K, Wägemann P, Schröder-Preikschat W, Cassens B, Kapitza R, Dressler F & Mayer F. Thinking small: next-generation sensor networks close the size gap in vertebrate biologging. PLoS Biology

Duda N, Ripperger SP, Mayer F, Weigel R, Koelpin A. Low Weight Non-Invasive Heart Beat Detector for Small Airborne Vertebrates. IEEE Sensors Letters


Ripperger SP, Carter GC, Duda N, Koelpin A, Cassens B, Kapitza R, Josic D, Berrío-Martínez J, Page RA, & Mayer F. Vampire Bats that Cooperate in the Lab Maintain Their Social Networks in the Wild. Current Biology 29:P4139-4144.E4,
Featured as a ‘Science Magazine Story’ and as a ‘Nature Research Highlight’

Ripperger S, Günther L, Wieser H, Duda N, Hierold M, Cassens B, Kapitza R, Koelpin A & Mayer F. Proximity sensors on common noctule bats reveal evidence that mothers guide juveniles to roosts but not food. Biology Letters 15:20180884.
Featured as a ‘Nature Research Highlight’


Ripperger S, Josic D, Hierold M, Koelpin A, Weigel R, Hartmann M, Page R, and Mayer F. Automated proximity sensing in small vertebrates: design of miniaturized sensor nodes and first field tests in bats. Ecology and Evolution 6:2179-2189.