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Ostracism of an albino individual by a group of pigmented catfish.

Slavík O, Horký P, Maciak M - PLoS ONE (2015)

Bottom Line: Albino animals are rare in the wild; this trait is associated with easy detection by predators, non-native or damaged environments, and exclusively aphotic environments in total darkness.Albinism-related ostracism results in a solitary existence, usually followed by enhanced predation risk.The motivation for an individual's exclusion from a group appears to be the avoidance of the predation risk that increases not only for an odd individual but also for conspecifics within a group.

View Article: PubMed Central - PubMed

Affiliation: Department of Zoology and Fisheries, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamýcká 129, Prague, Czech Republic.

ABSTRACT
Physiological and behavioural constraints hinder albino individuals. Albino animals are rare in the wild; this trait is associated with easy detection by predators, non-native or damaged environments, and exclusively aphotic environments in total darkness. The social aspect of albinism is reported only for human beings, and the effect is distinguishable in time and space when social benefits, are used to a limited the extent. Thus far, the social consequences of albinism for animals remain unknown. We used socially established groups of the pigmented catfish, (Silurus glanis), to observe space and temporal distance detachment of albino specimens in laboratory conditions. The albino fish were separated at larger distances from the group than pigmented individuals with the same social status determined by familiarity, and this asymmetry also varied in time. Albinism-related ostracism results in a solitary existence, usually followed by enhanced predation risk. The motivation for an individual's exclusion from a group appears to be the avoidance of the predation risk that increases not only for an odd individual but also for conspecifics within a group. Our findings indicate a role for albinism in behavioural processes related to sociality in a group of conspecifics.

No MeSH data available.


Related in: MedlinePlus

The distance between experimental individual and the fish group showed as predicted average distance between unfamiliar catfish and members of a familiar group across two treatments (n = 2880).Red line = an albino unfamiliar conspecific; Black line = a pigmented unfamiliar conspecific. Standard errors for the start, mid and end of the experiment is provided.
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pone.0128279.g002: The distance between experimental individual and the fish group showed as predicted average distance between unfamiliar catfish and members of a familiar group across two treatments (n = 2880).Red line = an albino unfamiliar conspecific; Black line = a pigmented unfamiliar conspecific. Standard errors for the start, mid and end of the experiment is provided.

Mentions: An albino individual was found to be more distanced from the group of pigmented fish, and this relationship evolved over time (Table 1; Fig 2). The probability that an albino fish would be isolated in a separate sector of the artificial stream was two times higher than that for a pigmented individual (χ2 = 70.1293, P<0.001; Fig 3A). Furthermore, the group of familiar catfish was more cohesive in the presence of an albino (χ2 = 7.5031, P<0.01; Fig 3B), suggesting cohesion as a possible strategy to avoid the albino fish.


Ostracism of an albino individual by a group of pigmented catfish.

Slavík O, Horký P, Maciak M - PLoS ONE (2015)

The distance between experimental individual and the fish group showed as predicted average distance between unfamiliar catfish and members of a familiar group across two treatments (n = 2880).Red line = an albino unfamiliar conspecific; Black line = a pigmented unfamiliar conspecific. Standard errors for the start, mid and end of the experiment is provided.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4446300&req=5

pone.0128279.g002: The distance between experimental individual and the fish group showed as predicted average distance between unfamiliar catfish and members of a familiar group across two treatments (n = 2880).Red line = an albino unfamiliar conspecific; Black line = a pigmented unfamiliar conspecific. Standard errors for the start, mid and end of the experiment is provided.
Mentions: An albino individual was found to be more distanced from the group of pigmented fish, and this relationship evolved over time (Table 1; Fig 2). The probability that an albino fish would be isolated in a separate sector of the artificial stream was two times higher than that for a pigmented individual (χ2 = 70.1293, P<0.001; Fig 3A). Furthermore, the group of familiar catfish was more cohesive in the presence of an albino (χ2 = 7.5031, P<0.01; Fig 3B), suggesting cohesion as a possible strategy to avoid the albino fish.

Bottom Line: Albino animals are rare in the wild; this trait is associated with easy detection by predators, non-native or damaged environments, and exclusively aphotic environments in total darkness.Albinism-related ostracism results in a solitary existence, usually followed by enhanced predation risk.The motivation for an individual's exclusion from a group appears to be the avoidance of the predation risk that increases not only for an odd individual but also for conspecifics within a group.

View Article: PubMed Central - PubMed

Affiliation: Department of Zoology and Fisheries, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamýcká 129, Prague, Czech Republic.

ABSTRACT
Physiological and behavioural constraints hinder albino individuals. Albino animals are rare in the wild; this trait is associated with easy detection by predators, non-native or damaged environments, and exclusively aphotic environments in total darkness. The social aspect of albinism is reported only for human beings, and the effect is distinguishable in time and space when social benefits, are used to a limited the extent. Thus far, the social consequences of albinism for animals remain unknown. We used socially established groups of the pigmented catfish, (Silurus glanis), to observe space and temporal distance detachment of albino specimens in laboratory conditions. The albino fish were separated at larger distances from the group than pigmented individuals with the same social status determined by familiarity, and this asymmetry also varied in time. Albinism-related ostracism results in a solitary existence, usually followed by enhanced predation risk. The motivation for an individual's exclusion from a group appears to be the avoidance of the predation risk that increases not only for an odd individual but also for conspecifics within a group. Our findings indicate a role for albinism in behavioural processes related to sociality in a group of conspecifics.

No MeSH data available.


Related in: MedlinePlus