We suggest this is unlikely because once the focal males had learned that there was a female waiting at the end of the maze (when all fish finished the maze without guidance from day 4 and onward), the latency time to leave the start compartment did not differ between the brain size selection lines.
One might therefore expect a close correlation between the period of adolescence, the brain size, and the complexity of the social system; and, insofar as the latter factor can be assessed, this appears to be the case.
Our data do not enable us to discriminate between the alternative explanations for the correlation between brain size and invasion success.
The relationship between the contrasts for the average number of days of estrous and relative brain size was also not significant (b = 0.234, r = 0.181, p = 0.583), nor was the relationship between relative brain size and the inter-birth interval (b = 0.271, r = 0.274, p = 0.227).
To investigate potential differences in the learning curve between selection lines, we analyzed the interaction between brain size selection line and day of experiment.
I asked the British anthropologist Robin Dunbar, who studies the relationship between brain size and social circles, about the overload.
Further research is needed to ascertain the neurophysiological mechanisms underlying the relationship between brain size and inter-individual variability in behavioural traits.
Over the last century several studies investigated the relationship between brain size and intelligence [ 2] in young adults.
Myth: The correlation between brain size and intelligence within either race, and the average difference in brain size and intelligence between blacks and whites, are well established in the scientific literature.
We used path analysis to decompose the correlation between brain size and migratory distance as a function of the most relevant extrinsic and intrinsic factors (see results).
