Emergence of variation between groups through time in fish shoal collective motion

MacGregor, Hannah E. A.; Ioannou, Christos C.

doi:10.1101/2021.02.23.432454

Cited by 3 publications

(2 citation statements)

References 62 publications

(81 reference statements)

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“…3 (a). We studied the fish at a variety of ages from 40 dpf (days post fertilisation) to 120 dpf, to capture the effects of fish development [61] and repeated exposure to the experimental environment [62]. This way, we can probe the swimming behaviour at different developmental times of zebrafish.…”

Section: Resultsmentioning

confidence: 99%

Tuning Collective Behaviour in Zebrafish with Genetic Modification

Yang,

Kawafi,

Tong

et al. 2024

Preprint

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Zebrafish collective behaviour is widely used to assess their physical and mental state, serving as a valuable tool to assess the impact of ageing, disease genetics, and the effect of drugs. The essence of these macroscopic phenomena can be represented by active matter models, where the individuals are abstracted as interactive self-propelling agents. The behaviour of these agents depends on a set of parameters in a manner reminiscent of those between the constituents of physical systems. In a few cases, the system may be controlled at the level of the individual constituents such as the interactions between colloidal particles, or the enzymatic behaviour of de novo proteins. Usually, however, while the collective behaviour may be influenced by environmental factors, it typically cannot be changed at will. Here, we challenge this scenario in a biological context by genetically modifying zebrafish. We thus demonstrate the potential of genetic modification in the context of controlling the collective behaviour of biological active matter systems at the level of the constituents, rather than externally. In particular, we probe the effect of the lack of col11a2 gene in zebrafish, which causes the early onset of osteoarthritis. The resulting col11a2 -/- zebrafish exhibited compromised vertebral column properties, bent their body less while swimming, and took longer to change their orientations. Surprisingly, a group of 25 mutant fish exhibited more orderly collective motion than the wildtype. We show that the collective behaviour of wildtype and col11a2 zebrafish are captured with a simple active matter model, in which the mutant fish are modelled by self–propelling agents with a higher orientational noise on average. In this way, we demonstrate the possibility of tuning a biological system, changing the state space it occupies when interpreted with a simple active matter model.

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Section: Resultsmentioning

confidence: 99%

Tuning Collective Behaviour in Zebrafish with Genetic Modification

Yang,

Kawafi,

Tong

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…Yet, network metrics from pre-breeding seasons were on average equally repeatable to post-breeding networks. Recent studies on schools of fish also found a rapid divergence of group-level properties over just a few days under laboratory conditions [ 48 ]. Thus, our study adds to a growing body of evidence that differences are emergent to the groups, including groups from relatively anonymous societies (like schooling fish) and those that have strong and consistent social bonds (such as socially monogamous zebra finches).…”

Section: Discussionmentioning

confidence: 99%

Group-level differences in social network structure remain repeatable after accounting for environmental drivers

et al. 2023

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Individuals show consistent between-individual behavioural variation when they interact with conspecifics or heterospecifics. Such patterns might underlie emergent group-specific behavioural patterns and between-group behavioural differences. However, little is known about (i) how social and non-social drivers (external drivers) shape group-level social structures and (ii) whether animal groups show consistent between-group differences in social structure after accounting for external drivers. We used automated tracking to quantify daily social interactions and association networks in 12 colonies of zebra finches ( Taeniopygia guttata ). We quantified the effects of five external drivers (group size, group composition, ecological factors, physical environments and methodological differences) on daily interaction and association networks and tested whether colonies expressed consistent differences in day-to-day network structure after controlling for these drivers. Overall, we found that external drivers contribute significantly to network structure. However, even after accounting for the contribution of external drivers, there remained significant support for consistent between-group differences in both interaction (repeatability R : up to 0.493) and association (repeatability R : up to 0.736) network structures. Our study demonstrates how group-level differences in social behaviour can be partitioned into different drivers of variation, with consistent contributions from both social and non-social factors.

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Collective motion diminishes, but variation between groups emerges, through time in fish shoals

MacGregor

Ioannou

2021

R. Soc. open sci.

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Despite extensive interest in the dynamic interactions between individuals that drive collective motion in animal groups, the dynamics of collective motion over longer time frames are understudied. Using three-spined sticklebacks, Gasterosteus aculeatus, randomly assigned to 12 shoals of eight fish, we tested how six key traits of collective motion changed over shorter (within trials) and longer (between days) timescales under controlled laboratory conditions. Over both timescales, groups became less social with reduced cohesion, polarization, group speed and information transfer. There was consistent inter-group variation (i.e. collective personality variation) for all collective motion parameters, but groups also differed in how their collective motion changed over days in their cohesion, polarization, group speed and information transfer. This magnified differences between groups, suggesting that over time the ‘typical’ collective motion cannot be easily characterized. Future studies are needed to understand whether such between-group differences in changes over time are adaptive and represent improvements in group performance or are suboptimal but represent a compromise between individuals in their preferences for the characteristics of collective behaviour.

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Emergence of variation between groups through time in fish shoal collective motion

Cited by 3 publications

References 62 publications

Tuning Collective Behaviour in Zebrafish with Genetic Modification

Tuning Collective Behaviour in Zebrafish with Genetic Modification

Group-level differences in social network structure remain repeatable after accounting for environmental drivers

Collective motion diminishes, but variation between groups emerges, through time in fish shoals

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