Social fish have larger brains and greater relative telencephalon sizes: support for the social brain hypothesis from wild, intraspecific comparisons
Sign Up to like & getrecommendations! Published in 2025 at "Proceedings of the Royal Society B: Biological Sciences"
DOI: 10.1098/rspb.2025.1169
Abstract: The social brain hypothesis (SBH) posits that complex social environments drive the evolution of larger brains and enlargement of specific brain regions. Among species comparisons often report contrasting relationships between social complexity and brain size,… read more here.
Keywords: larger brains; brain hypothesis; brain; brain size ... See more keywords
Transplant experiments demonstrate that larger brains are favoured in high-competition environments in Trinidadian killifish.
Sign Up to like & getrecommendations! Published in 2022 at "Ecology letters"
DOI: 10.1111/ele.14133
Abstract: The extent to which the evolution of a larger brain is adaptive remains controversial. Trinidadian killifish (Anablepsoides hartii) are found in sites that differ in predation intensity; fish that experience decreased predation and increased intraspecific… read more here.
Keywords: larger brains; brain; competition; competition environments ... See more keywords
The costs and benefits of larger brains in fishes
Sign Up to like & getrecommendations! Published in 2022 at "Journal of Evolutionary Biology"
DOI: 10.1111/jeb.14026
Abstract: The astonishing diversity of brain sizes observed across the animal kingdom is typically explained in the context of trade‐offs: the benefits of a larger brain, such as enhanced cognitive ability, are balanced against potential costs,… read more here.
Keywords: larger brains; benefits larger; brain; brains fishes ... See more keywords