Mechanisms underlying shoal composition in the Trinidadian guppy, Poecilia reticulata
Free-ranging groups are frequently assorted by phenotypic characters. However, very little is known about the underlying processes that determine this structuring. In this study, we investigate the mechanisms underlying the phenotypic composition of shoals of guppies (Poecilia reticulata) in a high-...
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Format: | Article in Journal/Newspaper |
Language: | English |
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2003
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Online Access: | https://research-portal.st-andrews.ac.uk/en/researchoutput/mechanisms-underlying-shoal-composition-in-the-trinidadian-guppy-poecilia-reticulata(f2602bc1-b5b7-4d1f-9063-fbb55608ec81).html https://doi.org/10.1034/j.1600-0706.2003.12023.x http://www.scopus.com/inward/record.url?scp=0038623651&partnerID=8YFLogxK |
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ftunstandrewcris:oai:research-portal.st-andrews.ac.uk:publications/f2602bc1-b5b7-4d1f-9063-fbb55608ec81 2024-09-09T19:30:46+00:00 Mechanisms underlying shoal composition in the Trinidadian guppy, Poecilia reticulata Croft, DP Arrowsmith, BJ Bielby, J Skinner, K White, E Couzin, ID Magurran, Anne Elizabeth Ramnarine, I Krause, J 2003-03 https://research-portal.st-andrews.ac.uk/en/researchoutput/mechanisms-underlying-shoal-composition-in-the-trinidadian-guppy-poecilia-reticulata(f2602bc1-b5b7-4d1f-9063-fbb55608ec81).html https://doi.org/10.1034/j.1600-0706.2003.12023.x http://www.scopus.com/inward/record.url?scp=0038623651&partnerID=8YFLogxK eng eng https://research-portal.st-andrews.ac.uk/en/researchoutput/mechanisms-underlying-shoal-composition-in-the-trinidadian-guppy-poecilia-reticulata(f2602bc1-b5b7-4d1f-9063-fbb55608ec81).html info:eu-repo/semantics/restrictedAccess Croft , DP , Arrowsmith , BJ , Bielby , J , Skinner , K , White , E , Couzin , ID , Magurran , A E , Ramnarine , I & Krause , J 2003 , ' Mechanisms underlying shoal composition in the Trinidadian guppy, Poecilia reticulata ' , Oikos , vol. 100 , no. 3 , pp. 429-438 . https://doi.org/10.1034/j.1600-0706.2003.12023.x TROUT SALMO-TRUTTA PREDATION RISK BROWN TROUT FISH SHOALS ANTIPREDATOR BEHAVIOR SOCIAL-ORGANIZATION FORAGING MINNOWS ATLANTIC SALMON YELLOW PERCH SIZE article 2003 ftunstandrewcris https://doi.org/10.1034/j.1600-0706.2003.12023.x 2024-07-24T23:35:08Z Free-ranging groups are frequently assorted by phenotypic characters. However, very little is known about the underlying processes that determine this structuring. In this study, we investigate the mechanisms underlying the phenotypic composition of shoals of guppies (Poecilia reticulata) in a high-predation stream in Trinidad's Northern Mountain Range. We collected 57 entire wild shoals, which were strongly assorted by body length. Shoal encounters staged within all experimental arena showed shoal fission (but not fusion) events to be an important mechanism ill generating phenotypic assortment. In the wild, fission and fusion between guppy shoals occurred extremely frequently and thus are unlikely to constrain the opportunities for shoal assortment. However, fission and fusion processes occur under the restrictions imposed by the distribution of individuals within the environment. We observed size specific segregation within the habitat in three dimensions, providing a passive mechanism that contributes to the maintenance of the observed homogeneity of group composition. Furthermore sex differences were found in social behaviour. Individual male guppies switched between shoals more frequently than females and left a shoal more often than females. We argue that shoal composition is determined by habitat segregation on a medium spatial scale and by fission/fusion processes oil a small spatial scale (with sex-specific shoal dynamics adding a additional layer of complexity). Article in Journal/Newspaper Atlantic salmon University of St Andrews: Research Portal Minnows ENVELOPE(-65.359,-65.359,-66.027,-66.027) Oikos 100 3 429 438 |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
TROUT SALMO-TRUTTA PREDATION RISK BROWN TROUT FISH SHOALS ANTIPREDATOR BEHAVIOR SOCIAL-ORGANIZATION FORAGING MINNOWS ATLANTIC SALMON YELLOW PERCH SIZE |
spellingShingle |
TROUT SALMO-TRUTTA PREDATION RISK BROWN TROUT FISH SHOALS ANTIPREDATOR BEHAVIOR SOCIAL-ORGANIZATION FORAGING MINNOWS ATLANTIC SALMON YELLOW PERCH SIZE Croft, DP Arrowsmith, BJ Bielby, J Skinner, K White, E Couzin, ID Magurran, Anne Elizabeth Ramnarine, I Krause, J Mechanisms underlying shoal composition in the Trinidadian guppy, Poecilia reticulata |
topic_facet |
TROUT SALMO-TRUTTA PREDATION RISK BROWN TROUT FISH SHOALS ANTIPREDATOR BEHAVIOR SOCIAL-ORGANIZATION FORAGING MINNOWS ATLANTIC SALMON YELLOW PERCH SIZE |
description |
Free-ranging groups are frequently assorted by phenotypic characters. However, very little is known about the underlying processes that determine this structuring. In this study, we investigate the mechanisms underlying the phenotypic composition of shoals of guppies (Poecilia reticulata) in a high-predation stream in Trinidad's Northern Mountain Range. We collected 57 entire wild shoals, which were strongly assorted by body length. Shoal encounters staged within all experimental arena showed shoal fission (but not fusion) events to be an important mechanism ill generating phenotypic assortment. In the wild, fission and fusion between guppy shoals occurred extremely frequently and thus are unlikely to constrain the opportunities for shoal assortment. However, fission and fusion processes occur under the restrictions imposed by the distribution of individuals within the environment. We observed size specific segregation within the habitat in three dimensions, providing a passive mechanism that contributes to the maintenance of the observed homogeneity of group composition. Furthermore sex differences were found in social behaviour. Individual male guppies switched between shoals more frequently than females and left a shoal more often than females. We argue that shoal composition is determined by habitat segregation on a medium spatial scale and by fission/fusion processes oil a small spatial scale (with sex-specific shoal dynamics adding a additional layer of complexity). |
format |
Article in Journal/Newspaper |
author |
Croft, DP Arrowsmith, BJ Bielby, J Skinner, K White, E Couzin, ID Magurran, Anne Elizabeth Ramnarine, I Krause, J |
author_facet |
Croft, DP Arrowsmith, BJ Bielby, J Skinner, K White, E Couzin, ID Magurran, Anne Elizabeth Ramnarine, I Krause, J |
author_sort |
Croft, DP |
title |
Mechanisms underlying shoal composition in the Trinidadian guppy, Poecilia reticulata |
title_short |
Mechanisms underlying shoal composition in the Trinidadian guppy, Poecilia reticulata |
title_full |
Mechanisms underlying shoal composition in the Trinidadian guppy, Poecilia reticulata |
title_fullStr |
Mechanisms underlying shoal composition in the Trinidadian guppy, Poecilia reticulata |
title_full_unstemmed |
Mechanisms underlying shoal composition in the Trinidadian guppy, Poecilia reticulata |
title_sort |
mechanisms underlying shoal composition in the trinidadian guppy, poecilia reticulata |
publishDate |
2003 |
url |
https://research-portal.st-andrews.ac.uk/en/researchoutput/mechanisms-underlying-shoal-composition-in-the-trinidadian-guppy-poecilia-reticulata(f2602bc1-b5b7-4d1f-9063-fbb55608ec81).html https://doi.org/10.1034/j.1600-0706.2003.12023.x http://www.scopus.com/inward/record.url?scp=0038623651&partnerID=8YFLogxK |
long_lat |
ENVELOPE(-65.359,-65.359,-66.027,-66.027) |
geographic |
Minnows |
geographic_facet |
Minnows |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
Croft , DP , Arrowsmith , BJ , Bielby , J , Skinner , K , White , E , Couzin , ID , Magurran , A E , Ramnarine , I & Krause , J 2003 , ' Mechanisms underlying shoal composition in the Trinidadian guppy, Poecilia reticulata ' , Oikos , vol. 100 , no. 3 , pp. 429-438 . https://doi.org/10.1034/j.1600-0706.2003.12023.x |
op_relation |
https://research-portal.st-andrews.ac.uk/en/researchoutput/mechanisms-underlying-shoal-composition-in-the-trinidadian-guppy-poecilia-reticulata(f2602bc1-b5b7-4d1f-9063-fbb55608ec81).html |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1034/j.1600-0706.2003.12023.x |
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Oikos |
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100 |
container_issue |
3 |
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429 |
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438 |
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