An ability to estimate quantities, such as the number of conspecifics or the size of a predator,
has been reported in vertebrates. Fish, in particular zebrafish, may be instrumental in …

Humans and other animals share a number sense', an intuitive understanding of countable
quantities. Having evolved independent from one another for hundreds of millions of years …

The core knowledge hypothesis postulates that infants automatically analyze their
environment along abstract dimensions, including numbers. According to this view …

Numerical cognition is ubiquitous in the animal kingdom. Domestic chicks are a widely used
developmental model for studying numerical cognition. Soon after hatching, chicks can …

Debates have arisen as to whether non-human animals actually can learn abstract non-
symbolic numerousness or whether they always rely on some continuous physical aspect of …

The ability to represent, discriminate, and perform arithmetic operations on discrete
quantities (numerosities) has been documented in a variety of species of different taxonomic …

Many species from diverse and often distantly related animal groups (eg monkeys, crows,
fish and bees) have a sense of number. This means that they can assess the number of …

The neural correlates of most cognitive functions in fish are unknown. This project aimed to
identify brain regions involved in visual learning in the cichlid fish Pseudotropheus zebra …

Animals' negotiations with the environment frequently involve quantitative assessments.
However, it is largely unknown how different nervous systems can deal with information …

Several studies have suggested that vertebrate and invertebrate species may possess a
number sense, ie an ability to process in a non-symbolic and non-verbal way the …