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In fish, though, data on cognitive flexibility are scarce, especially in the wild. We studied a lekking species of cichlid fish in Lake Tanganyika, <jats:italic>Aulonocranus dewindti<\/jats:italic>. Males create sand bowers as spawning sites and maintain them by removing any objects falling into it. In the first part of our experiment, we investigated the existence of spontaneous decision rules for the maintenance of the bowers. We showed that if a snail shell and a stone are placed in their bower, fish prefer to remove the shell first. In the second phase of our experiment, we took advantage of this spontaneous decision rule to investigate whether this rule was flexible. We tested five individuals in a choice against preference task, in which the fish had to modify their preference rule and remove the stone first to be allowed to then remove the shell and have a clean bower. While there was no overall trend towards flexibility in this task, there was variation at an individual level. Some individuals increased their preference for removing the shell first, deciding quickly and with little exploration of the objects. Others were more successful at choosing against preference and showed behaviours suggesting self-regulatory inhibition abilities. Bower-building cichlids could therefore be a promising model to study cognitive flexibility, and other aspects of animal cognition in the wild.<\/jats:p>","DOI":"10.1007\/s10071-023-01830-w","type":"journal-article","created":{"date-parts":[[2023,10,18]],"date-time":"2023-10-18T06:02:27Z","timestamp":1697608947000},"page":"1959-1971","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Cognitive flexibility in a Tanganyikan bower-building cichlid, Aulonocranus dewindti"],"prefix":"10.1007","volume":"26","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0879-1700","authenticated-orcid":false,"given":"Ma\u00eblan","family":"Tomasek","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Midori","family":"Stark","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1766-9598","authenticated-orcid":false,"given":"Val\u00e9rie","family":"Dufour","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6131-9734","authenticated-orcid":false,"given":"Alex","family":"Jordan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2023,10,18]]},"reference":[{"issue":"5","key":"1830_CR1","doi-asserted-by":"publisher","first-page":"424","DOI":"10.1111\/eth.13275","volume":"128","author":"M Aellen","year":"2022","unstructured":"Aellen M, Burkart JM, Bshary R (2022) No evidence for general intelligence in a fish. 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