I know my neighbour: individual recognition in Octopus vulgaris.

<h4>Background</h4>Little is known about individual recognition (IR) in octopuses, although they have been abundantly studied for their sophisticated behaviour and learning capacities. Indeed, the ability of octopuses to recognise conspecifics is suggested by a number of clues emerging f...

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Autores principales:	Elena Tricarico, Luciana Borrelli, Francesca Gherardi, Graziano Fiorito
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2011
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e6532f6929e7402eb77728c7f85916c5
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spelling	oai:doaj.org-article:e6532f6929e7402eb77728c7f85916c52021-11-18T06:55:48ZI know my neighbour: individual recognition in Octopus vulgaris.1932-620310.1371/journal.pone.0018710https://doaj.org/article/e6532f6929e7402eb77728c7f85916c52011-04-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21533257/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Background</h4>Little is known about individual recognition (IR) in octopuses, although they have been abundantly studied for their sophisticated behaviour and learning capacities. Indeed, the ability of octopuses to recognise conspecifics is suggested by a number of clues emerging from both laboratory studies (where they appear to form and maintain dominance hierarchies) and field observations (octopuses of neighbouring dens display little agonism between each other). To fill this gap in knowledge, we investigated the behaviour of 24 size-matched pairs of Octopus vulgaris in laboratory conditions.<h4>Methodology/principal findings</h4>The experimental design was composed of 3 phases: Phase 1 (acclimatization): 12 "sight-allowed" (and 12 "isolated") pairs were maintained for 3 days in contiguous tanks separated by a transparent (and opaque) partition to allow (and block) the vision of the conspecific; Phase 2 (cohabitation): members of each pair (both sight-allowed and isolated) were transferred into an experimental tank and were allowed to interact for 15 min every day for 3 consecutive days; Phase 3 (test): each pair (both sight-allowed and isolated) was subject to a switch of an octopus to form pairs composed of either familiar ("sham switches") or unfamiliar conspecifics ("real switches"). Longer latencies (i.e. the time elapsed from the first interaction) and fewer physical contacts in the familiar pairs as opposed to the unfamiliar pairs were used as proxies for recognition.<h4>Conclusions</h4>Octopuses appear able to recognise conspecifics and to remember the individual previously met for at least one day. To the best of our knowledge, this is the first experimental study showing the occurrence of a form of IR in cephalopods. Future studies should clarify whether this is a "true" IR.Elena TricaricoLuciana BorrelliFrancesca GherardiGraziano FioritoPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 6, Iss 4, p e18710 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Elena Tricarico Luciana Borrelli Francesca Gherardi Graziano Fiorito I know my neighbour: individual recognition in Octopus vulgaris.
description	<h4>Background</h4>Little is known about individual recognition (IR) in octopuses, although they have been abundantly studied for their sophisticated behaviour and learning capacities. Indeed, the ability of octopuses to recognise conspecifics is suggested by a number of clues emerging from both laboratory studies (where they appear to form and maintain dominance hierarchies) and field observations (octopuses of neighbouring dens display little agonism between each other). To fill this gap in knowledge, we investigated the behaviour of 24 size-matched pairs of Octopus vulgaris in laboratory conditions.<h4>Methodology/principal findings</h4>The experimental design was composed of 3 phases: Phase 1 (acclimatization): 12 "sight-allowed" (and 12 "isolated") pairs were maintained for 3 days in contiguous tanks separated by a transparent (and opaque) partition to allow (and block) the vision of the conspecific; Phase 2 (cohabitation): members of each pair (both sight-allowed and isolated) were transferred into an experimental tank and were allowed to interact for 15 min every day for 3 consecutive days; Phase 3 (test): each pair (both sight-allowed and isolated) was subject to a switch of an octopus to form pairs composed of either familiar ("sham switches") or unfamiliar conspecifics ("real switches"). Longer latencies (i.e. the time elapsed from the first interaction) and fewer physical contacts in the familiar pairs as opposed to the unfamiliar pairs were used as proxies for recognition.<h4>Conclusions</h4>Octopuses appear able to recognise conspecifics and to remember the individual previously met for at least one day. To the best of our knowledge, this is the first experimental study showing the occurrence of a form of IR in cephalopods. Future studies should clarify whether this is a "true" IR.
format	article
author	Elena Tricarico Luciana Borrelli Francesca Gherardi Graziano Fiorito
author_facet	Elena Tricarico Luciana Borrelli Francesca Gherardi Graziano Fiorito
author_sort	Elena Tricarico
title	I know my neighbour: individual recognition in Octopus vulgaris.
title_short	I know my neighbour: individual recognition in Octopus vulgaris.
title_full	I know my neighbour: individual recognition in Octopus vulgaris.
title_fullStr	I know my neighbour: individual recognition in Octopus vulgaris.
title_full_unstemmed	I know my neighbour: individual recognition in Octopus vulgaris.
title_sort	i know my neighbour: individual recognition in octopus vulgaris.
publisher	Public Library of Science (PLoS)
publishDate	2011
url	https://doaj.org/article/e6532f6929e7402eb77728c7f85916c5
work_keys_str_mv	AT elenatricarico iknowmyneighbourindividualrecognitioninoctopusvulgaris AT lucianaborrelli iknowmyneighbourindividualrecognitioninoctopusvulgaris AT francescagherardi iknowmyneighbourindividualrecognitioninoctopusvulgaris AT grazianofiorito iknowmyneighbourindividualrecognitioninoctopusvulgaris
_version_	1718424201518383104

I know my neighbour: individual recognition in Octopus vulgaris.

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