Fishing out collective memory of migratory schools

G. De Luca, Patrizio Mariani, Brian MacKenzie, M. Marsili

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Animals form groups for many reasons but there are costs and
benefit associated with group formation. One of the benefits is collective
memory. In groups on the move, social interactions play a crucial
role in the cohesion and the ability to make consensus decisions.
When migrating from spawning to feeding areas fish schools need to
retain a collective memory of the destination site over thousand of
kilometers and changes in group formation or individual preference
can produce sudden changes in migration pathways. We propose a
modelling framework, based on stochastic adaptive networks, that
can reproduce this collective behaviour. We assume that three factors
control group formation and school migration behaviour: the intensity
of social interaction, the relative number of informed individuals
and the preference that each individual has for the particular migration
area. We treat these factors independently and relate the individuals’
preferences to the experience and memory for certain migration
sites. We demonstrate that removal of knowledgable individuals
or alteration of individual preference can produce rapid changes in
group formation and collective behavior. For example, intensive fishing
targeting the migratory species and also their preferred prey can
reduce both terms to a point at which migration to the destination
sites is suddenly stopped. The conceptual approaches represented by
our modelling framework may therefore be able to explain large-scale
changes in fish migration and spatial distribution
Original languageEnglish
JournalJournal of the Royal Society. Interface
Volume11
Issue number95
ISSN1742-5689
DOIs
Publication statusPublished - 2014

Cite this

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title = "Fishing out collective memory of migratory schools",
abstract = "Animals form groups for many reasons but there are costs andbenefit associated with group formation. One of the benefits is collectivememory. In groups on the move, social interactions play a crucialrole in the cohesion and the ability to make consensus decisions.When migrating from spawning to feeding areas fish schools need toretain a collective memory of the destination site over thousand ofkilometers and changes in group formation or individual preferencecan produce sudden changes in migration pathways. We propose amodelling framework, based on stochastic adaptive networks, thatcan reproduce this collective behaviour. We assume that three factorscontrol group formation and school migration behaviour: the intensityof social interaction, the relative number of informed individualsand the preference that each individual has for the particular migrationarea. We treat these factors independently and relate the individuals’preferences to the experience and memory for certain migrationsites. We demonstrate that removal of knowledgable individualsor alteration of individual preference can produce rapid changes ingroup formation and collective behavior. For example, intensive fishingtargeting the migratory species and also their preferred prey canreduce both terms to a point at which migration to the destinationsites is suddenly stopped. The conceptual approaches represented byour modelling framework may therefore be able to explain large-scalechanges in fish migration and spatial distribution",
author = "{De Luca}, G. and Patrizio Mariani and Brian MacKenzie and M. Marsili",
year = "2014",
doi = "10.1098/rsif.2014.0043",
language = "English",
volume = "11",
journal = "Journal of the Royal Society. Interface",
issn = "1742-5689",
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}

Fishing out collective memory of migratory schools. / De Luca, G.; Mariani, Patrizio; MacKenzie, Brian; Marsili, M.

In: Journal of the Royal Society. Interface, Vol. 11, No. 95, 2014.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Fishing out collective memory of migratory schools

AU - De Luca, G.

AU - Mariani, Patrizio

AU - MacKenzie, Brian

AU - Marsili, M.

PY - 2014

Y1 - 2014

N2 - Animals form groups for many reasons but there are costs andbenefit associated with group formation. One of the benefits is collectivememory. In groups on the move, social interactions play a crucialrole in the cohesion and the ability to make consensus decisions.When migrating from spawning to feeding areas fish schools need toretain a collective memory of the destination site over thousand ofkilometers and changes in group formation or individual preferencecan produce sudden changes in migration pathways. We propose amodelling framework, based on stochastic adaptive networks, thatcan reproduce this collective behaviour. We assume that three factorscontrol group formation and school migration behaviour: the intensityof social interaction, the relative number of informed individualsand the preference that each individual has for the particular migrationarea. We treat these factors independently and relate the individuals’preferences to the experience and memory for certain migrationsites. We demonstrate that removal of knowledgable individualsor alteration of individual preference can produce rapid changes ingroup formation and collective behavior. For example, intensive fishingtargeting the migratory species and also their preferred prey canreduce both terms to a point at which migration to the destinationsites is suddenly stopped. The conceptual approaches represented byour modelling framework may therefore be able to explain large-scalechanges in fish migration and spatial distribution

AB - Animals form groups for many reasons but there are costs andbenefit associated with group formation. One of the benefits is collectivememory. In groups on the move, social interactions play a crucialrole in the cohesion and the ability to make consensus decisions.When migrating from spawning to feeding areas fish schools need toretain a collective memory of the destination site over thousand ofkilometers and changes in group formation or individual preferencecan produce sudden changes in migration pathways. We propose amodelling framework, based on stochastic adaptive networks, thatcan reproduce this collective behaviour. We assume that three factorscontrol group formation and school migration behaviour: the intensityof social interaction, the relative number of informed individualsand the preference that each individual has for the particular migrationarea. We treat these factors independently and relate the individuals’preferences to the experience and memory for certain migrationsites. We demonstrate that removal of knowledgable individualsor alteration of individual preference can produce rapid changes ingroup formation and collective behavior. For example, intensive fishingtargeting the migratory species and also their preferred prey canreduce both terms to a point at which migration to the destinationsites is suddenly stopped. The conceptual approaches represented byour modelling framework may therefore be able to explain large-scalechanges in fish migration and spatial distribution

U2 - 10.1098/rsif.2014.0043

DO - 10.1098/rsif.2014.0043

M3 - Journal article

VL - 11

JO - Journal of the Royal Society. Interface

JF - Journal of the Royal Society. Interface

SN - 1742-5689

IS - 95

ER -