Source: Phys Org
A study by researchers from the University of Montpellier, the University of Zurich, and other institutions has revealed a connection between relative endocranial volume (REV) and breed function, behavior, and morphology in domestic dogs. Despite having brains about 20% smaller than their wild ancestor, the gray wolf, dogs exhibit diverse cognitive abilities shaped by centuries of selective breeding for functional traits.
Analyzing data from 1,682 dogs across 172 breeds, the study found REV strongly correlates with body size, breed function, phylogenetic classification, and cranial shape. Toy breeds, bred for companionship, have the largest REVs relative to body size, while working breeds, selected for tasks like guarding and rescue, have smaller REVs. Surprisingly, cooperative behavior showed no significant link to REV, while traits like fear, aggression, and separation anxiety correlated positively. These findings, published in Biology Letters, highlight how artificial selection and domestication have shaped the brain morphology and behavior of dogs, challenging traditional assumptions about brain size and cognitive complexity.
Read the full story HERE: https://phys.org/news/2024-11-links-brain-volume-temperament-diverse.html#google_vignette