ORCID Profile
0000-0001-8985-3920
Current Organisation
IMT School for Advanced Studies Lucca
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Publisher: Proceedings of the National Academy of Sciences
Date: 07-11-2011
Abstract: Collective motion, where large numbers of in iduals move synchronously together, is achieved when in iduals adopt interaction rules that determine how they respond to their neighbors’ movements and positions. These rules determine how group-living animals move, make decisions, and transmit information between in iduals. Nonetheless, few studies have explicitly determined these interaction rules in moving groups, and very little is known about the interaction rules of fish. Here, we identify three key rules for the social interactions of mosquitofish ( Gambusia holbrooki ): ( i ) Attraction forces are important in maintaining group cohesion, while we find only weak evidence that fish align with their neighbor’s orientation ( ii ) repulsion is mediated principally by changes in speed ( iii ) although the positions and directions of all shoal members are highly correlated, in iduals only respond to their single nearest neighbor. The last two of these rules are different from the classical models of collective animal motion, raising new questions about how fish and other animals self-organize on the move.
Publisher: Elsevier BV
Date: 02-2018
DOI: 10.1016/J.BEPROC.2017.12.006
Abstract: Collective movement is achieved when in iduals adopt local rules to interact with their neighbours. How the brain processes information about neighbours' positions and movements may affect how in iduals interact in groups. As brain size can determine such information processing it should impact collective animal movement. Here we investigate whether brain size affects the structure and organisation of newly forming fish shoals by quantifying the collective movement of guppies (Poecilia reticulata) from large- and small-brained selection lines, with known differences in learning and memory. We used automated tracking software to determine shoaling behaviour of single-sex groups of eight or two fish and found no evidence that brain size affected the speed, group size, or spatial and directional organisation of fish shoals. Our results suggest that brain size does not play an important role in how fish interact with each other in these types of moving groups of unfamiliar in iduals. Based on these results, we propose that shoal dynamics are likely to be governed by relatively basic cognitive processes that do not differ in these brain size selected lines of guppies.
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Andrea Perna.