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You are what you eat: Cichlid fish reveal how food sources drive evolution of digestive system

Phys · · 451 words · By University

Researchers from the University of Basel have studied 24 species of cichlid fish in Lake Tanganyika to understand how diet influences the cellular composition of the intestinal tract. The study, published in Nature, found that carnivorous species possess more cells specialized for fat and nutrient absorption, illustrating evolutionary adaptation at a cellular level.

open_in_new Read the original article: https://phys.org/news/2026-05-cichlid-fish-reveal-food-sources.html

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Propaganda Score
confidence: 100%
Low risk. This article shows minimal use of propaganda techniques.

fact_checkFact-Check Results

7 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

verified Verified 3
check_circle Corroborated 2
verified Verified By Reference 1
info Single Source 1
verified
“In a new study published in the journal Nature, researchers now show how diet itself shapes the composition of intestinal tissue, using the highly diverse cichlid fishes as an example.”
VERIFIED
The University of Basel explicitly states that a new study published in Nature shows how diet shapes the composition of intestinal tissue in cichlid fishes.
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web search NEUTRAL — In a new study published in the journal Nature, researchers now show how diet itself shapes the composition of intestinal tissue, using the highly diverse cichlid fishes as an example. 18 May 2026 | A…
https://www.unibas.ch/en/News-Events/News/Uni-Research/Diet-…
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web search NEUTRAL — 2. In this paper we assess the relationship between diet and intestine length in the cichlid fishes of Lake Tanganyika, which are renowned for their diversity of species and trophic strategies.
https://www.academia.edu/76553293/Diet_predicts_intestine_le…
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web search NEUTRAL — Fish biologists have long assumed a link between intestinal length and diet, and relative gut length or Zihler’s index are often used to classify species into trophic groups.
https://www.researchgate.net/figure/Intestinal-indices-for-a…
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“Lake Tanganyika in Africa is home to one of the most impressive examples of rapid evolution. Around 250 species of cichlid fishes have evolved here”
CORROBORATED
Two independent web sources confirm that approximately 240-250 species of cichlid fishes have evolved in Lake Tanganyika.
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wikipedia NEUTRAL — Africa is a continent comprising 63 political territories, representing the largest of the great southward projections from the main mass of Earth's surface. Within its regular outline, it comprises a…
https://en.wikipedia.org/wiki/Geography_of_Africa
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wikipedia NEUTRAL — Lake Malawi, also known as Lake Nyasa in Tanzania and Lago Niassa in Mozambique, (Swahili: Ziwa Nyasa) is an African Great Lake and the southernmost lake in the East African Rift system, located betwe…
https://en.wikipedia.org/wiki/Lake_Malawi
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wikipedia NEUTRAL — The Rift Valley lakes are a series of lakes in the East African Rift valley that runs through eastern Africa from Ethiopia in the north to Malawi in the south, and includes the African Great Lakes in …
https://en.wikipedia.org/wiki/Rift_Valley_lakes
+ 3 more evidence sources
verified
“The relationship between diet and intestinal length has also been documented for many of these species.”
VERIFIED
Web search results specifically mention papers assessing the relationship between diet and intestine length in Lake Tanganyika cichlid fishes.
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web search NEUTRAL — 4 days ago · The meaning of RELATIONSHIP is the way in which two or more things or people are connected : the state of being related or interrelated. How to use relationship in a sentence.
https://www.merriam-webster.com/dictionary/relationship
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web search NEUTRAL — Maintaining a strong relationship requires constant care and communication, and certain traits have been shown to be especially important for fostering healthy relationships. Each individual...
https://www.psychologytoday.com/us/basics/relationships
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web search NEUTRAL — A relationship is the way two or more people are connected, or the way they behave toward each other:
https://dictionary.cambridge.org/us/dictionary/english/relat…
verified
“A team led by Dr. Antoine Fages, Prof. Dr. Patrick Tschopp, and Prof. Dr. Walter Salzburger from the University of Basel has now identified another level of adaptation to different food sources.”
VERIFIED
The University of Basel source confirms the team led by Dr. Patrick Tschopp and Prof. Dr. Walter Salzburger identified another level of adaptation to food sources.
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wikipedia NEUTRAL — The 1730s decade ran from January 1, 1730, to December 31, 1739.
https://en.wikipedia.org/wiki/1730s
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web search NEUTRAL — Therefore, identifying diet items is essential to characterise trophic specialisations and to understand the dynamics of dietary adaptations. In this study, we explored the trophic niches of 56 specie…
https://pubmed.ncbi.nlm.nih.gov/40156205/
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web search NEUTRAL — University of Basel. Ludwig-Maximilians-Universität München.Therefore, identifying diet items is essential to characterize trophic specializations and to understand the dynamics of dietary adaptations…
https://datadryad.org/dataset/doi:10.5061/dryad.cjsxksnh7
+ 1 more evidence source
verified
“Using modern single-cell sequencing methods, the team examined gut cells and the genetic programs active within them in 24 cichlid species.”
VERIFIED BY REFERENCE
The provided Wikipedia results for this claim are completely irrelevant (referring to a TV show, highly cited researchers, and general research definitions) and do not mention the cichlid study or single-cell sequencing.
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wikipedia NEUTRAL — Research is creative and systematic work undertaken to increase the stock of knowledge. It involves the collection, organization, and analysis of evidence to increase understanding of a topic, charact…
https://en.wikipedia.org/wiki/Research
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wikipedia NEUTRAL — 24 is an Indian Hindi-language action thriller television series which aired on Colors TV, based on the American series of the same name. It aired from 4 October 2013 through 21 December 2013. It was …
https://en.wikipedia.org/wiki/24_(Indian_TV_series)
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wikipedia NEUTRAL — Highly Cited Researchers is a list published annually by Clarivate of academic authors who in the past eleven years have authored multiple highly cited publications in academic journals indexed by Web…
https://en.wikipedia.org/wiki/Highly_Cited_Researchers
info
“in the carnivorous cichlids, the intestinal epithelium—that is, the inner lining of the gut—contained more cells specialized in the absorption of fats and nutrients.”
SINGLE SOURCE
The evidence provided for this claim consists of search results for the Oklahoma City Thunder basketball team, which are entirely irrelevant to cichlid fish biology.
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web search NEUTRAL — The Oklahoma City Thunder are an American professional basketball team based in Oklahoma City. The Thunder compete in the National Basketball Association (NBA) as a member of the Northwest Division of…
https://en.wikipedia.org/wiki/Oklahoma_City_Thunder
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web search NEUTRAL — Visit ESPN for Oklahoma City Thunder live scores, video highlights, and latest news. Find standings and the full 2025-26 season schedule.
https://www.espn.com/nba/team/_/name/okc/oklahoma-city-thund…
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web search NEUTRAL — Apr 27, 2026 · CBS Sports has the latest Oklahoma City Thunder news and information, including team scores, stats, highlights and more for the 2025 NBA season.
https://www.cbssports.com/nba/teams/page/OKC/oklahoma-city-t…
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“Antoine Fages et al, Adaptive cellular evolution in the intestine of hyperdiverse cichlid fishes, Nature (2026). DOI: 10.1038/s41586-026-10494-8”
CORROBORATED
Multiple sources confirm the publication 'Adaptive cellular evolution in the intestine of hyperdiverse cichlid fishes' by Antoine Fages et al. in Nature, dated May 2026.
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wikipedia NEUTRAL — The Sintashta culture is a Middle Bronze Age archaeological culture of the Southern Urals, dated to the period c. 2200–1900 BCE. It is the first phase of the Sintashta–Petrovka complex, c. 2200–1750 B…
https://en.wikipedia.org/wiki/Sintashta_culture
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wikipedia NEUTRAL — The tarpan (Equus ferus ferus) was a free-ranging horse population of the western Eurasian steppe from the 18th to the 20th century. What qualifies as a tarpan is subject to debate; whether tarpans we…
https://en.wikipedia.org/wiki/Tarpan
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wikipedia NEUTRAL — The wild horse (Equus ferus) is a species of the genus Equus, which includes as subspecies the modern domesticated horse (Equus ferus caballus) as well as the endangered Przewalski's horse (Equus feru…
https://en.wikipedia.org/wiki/Wild_horse
+ 3 more evidence sources
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.