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Visual adaptation and microhabitat choice in Lake Victoria cichlid fish

When different genotypes choose different habitats to better match their phenotypes, genetic differentiation within a population may be promoted. Mating within those habitats may subsequently contribute to reproductive isolation. In cichlid fish, visual adaptation to alternative visual environments...

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Autores principales: Mameri, Daniel, van Kammen, Corina, Groothuis, Ton G. G., Seehausen, Ole, Maan, Martine E.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6458373/
https://www.ncbi.nlm.nih.gov/pubmed/31032041
http://dx.doi.org/10.1098/rsos.181876
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author Mameri, Daniel
van Kammen, Corina
Groothuis, Ton G. G.
Seehausen, Ole
Maan, Martine E.
author_facet Mameri, Daniel
van Kammen, Corina
Groothuis, Ton G. G.
Seehausen, Ole
Maan, Martine E.
author_sort Mameri, Daniel
collection PubMed
description When different genotypes choose different habitats to better match their phenotypes, genetic differentiation within a population may be promoted. Mating within those habitats may subsequently contribute to reproductive isolation. In cichlid fish, visual adaptation to alternative visual environments is hypothesized to contribute to speciation. Here, we investigated whether variation in visual sensitivity causes different visual habitat preferences, using two closely related cichlid species that occur at different but overlapping water depths in Lake Victoria and that differ in visual perception (Pundamilia spp.). In addition to species differences, we explored potential effects of visual plasticity, by rearing fish in two different light conditions: broad-spectrum (mimicking shallow water) and red-shifted (mimicking deeper waters). Contrary to expectations, fish did not prefer the light environment that mimicked their typical natural habitat. Instead, we found an overall preference for the broad-spectrum environment. We also found a transient influence of the rearing condition, indicating that the assessment of microhabitat preference requires repeated testing to control for familiarity effects. Together, our results show that cichlid fish exert visual habitat preference but do not support straightforward visual habitat matching.
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spelling pubmed-64583732019-04-26 Visual adaptation and microhabitat choice in Lake Victoria cichlid fish Mameri, Daniel van Kammen, Corina Groothuis, Ton G. G. Seehausen, Ole Maan, Martine E. R Soc Open Sci Biology (Whole Organism) When different genotypes choose different habitats to better match their phenotypes, genetic differentiation within a population may be promoted. Mating within those habitats may subsequently contribute to reproductive isolation. In cichlid fish, visual adaptation to alternative visual environments is hypothesized to contribute to speciation. Here, we investigated whether variation in visual sensitivity causes different visual habitat preferences, using two closely related cichlid species that occur at different but overlapping water depths in Lake Victoria and that differ in visual perception (Pundamilia spp.). In addition to species differences, we explored potential effects of visual plasticity, by rearing fish in two different light conditions: broad-spectrum (mimicking shallow water) and red-shifted (mimicking deeper waters). Contrary to expectations, fish did not prefer the light environment that mimicked their typical natural habitat. Instead, we found an overall preference for the broad-spectrum environment. We also found a transient influence of the rearing condition, indicating that the assessment of microhabitat preference requires repeated testing to control for familiarity effects. Together, our results show that cichlid fish exert visual habitat preference but do not support straightforward visual habitat matching. The Royal Society 2019-03-27 /pmc/articles/PMC6458373/ /pubmed/31032041 http://dx.doi.org/10.1098/rsos.181876 Text en © 2019 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
spellingShingle Biology (Whole Organism)
Mameri, Daniel
van Kammen, Corina
Groothuis, Ton G. G.
Seehausen, Ole
Maan, Martine E.
Visual adaptation and microhabitat choice in Lake Victoria cichlid fish
title Visual adaptation and microhabitat choice in Lake Victoria cichlid fish
title_full Visual adaptation and microhabitat choice in Lake Victoria cichlid fish
title_fullStr Visual adaptation and microhabitat choice in Lake Victoria cichlid fish
title_full_unstemmed Visual adaptation and microhabitat choice in Lake Victoria cichlid fish
title_short Visual adaptation and microhabitat choice in Lake Victoria cichlid fish
title_sort visual adaptation and microhabitat choice in lake victoria cichlid fish
topic Biology (Whole Organism)
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6458373/
https://www.ncbi.nlm.nih.gov/pubmed/31032041
http://dx.doi.org/10.1098/rsos.181876
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