caa a22 4500 605542112 CHVBK 20210128100920.0 cr unu---uuuuu 210128e20150501xx s 000 0 eng 10.1007/s10071-015-0833-9 doi (NATIONALLICENCE)springer-10.1007/s10071-015-0833-9 No evidence for memory interference across sessions in food hoarding marsh tits Poecile palustris under laboratory conditions [Elektronische Daten] [A. Urhan, Anders Brodin] Scatter hoarding birds are known for their accurate spatial memory. In a previous experiment, we tested the retrieval accuracy in marsh tits in a typical laboratory set-up for this species. We also tested the performance of humans in this experimental set-up. Somewhat unexpectedly, humans performed much better than marsh tits. In the first five attempts, humans relocated almost 90% of the caches they had hidden 5h earlier. Marsh tits only relocated 25% in the first five attempts and just above 40% in the first ten attempts. Typically, in this type of experiment, the birds will be caching and retrieving many times in the same sites in the same experimental room. This is very different from the conditions in nature where hoarding parids only cache once in a caching site. Hence, it is possible that memories from previous sessions will disturb the formation of new memories. If there is such proactive interference, the prediction is that success should decay over sessions. Here, we have designed an experiment to investigate whether there is such memory interference in this type of experiment. We allowed marsh tits and humans to cache and retrieve in three repeated sessions without prior experience of the arena. The performance did not change over sessions, and on average, marsh tits correctly visited around 25% of the caches in the first five attempts. The corresponding success in humans was constant across sessions, and it was around 90% on average. We conclude that the somewhat poor performance of the marsh tits did not depend on proactive memory interference. We also discuss other possible reasons for why marsh tits in general do not perform better in laboratory experiments. Springer-Verlag Berlin Heidelberg, 2015 Marsh tit nationallicence Scatter hoarding nationallicence Spatial memory nationallicence Memory interference nationallicence Proactive interference nationallicence Urhan A. Department of Biology, Lund University, Ecology Building, 223 62, Lund, Sweden aut Brodin Anders Department of Biology, Lund University, Ecology Building, 223 62, Lund, Sweden aut Animal Cognition Springer Berlin Heidelberg 18/3(2015-05-01), 649-656 1435-9448 18:3<649 2015 18 10071 https://doi.org/10.1007/s10071-015-0833-9 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10071-015-0833-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Urhan A. Department of Biology, Lund University, Ecology Building, 223 62, Lund, Sweden aut NATIONALLICENCE 700 1- Brodin Anders Department of Biology, Lund University, Ecology Building, 223 62, Lund, Sweden aut NATIONALLICENCE 773 0- Animal Cognition Springer Berlin Heidelberg 18/3(2015-05-01), 649-656 1435-9448 18:3<649 2015 18 10071