Morphological differentiation in the widespread fish Galaxias maculatus: do darker environments imply bigger eyes?
The visual capacity of aquatic organisms is, in general, related to light penetration in the water. Therefore, aquatic environments that differ in color can potentially contribute to species polymorphism, especially in fish. In this study, we explore the relationship between light quality and intens...
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ftconicet:oai:ri.conicet.gov.ar:11336/141343 2023-10-09T21:47:20+02:00 Morphological differentiation in the widespread fish Galaxias maculatus: do darker environments imply bigger eyes? Rojo, Javier Hernán Rodriguez, Patricia Laura Boy, Claudia Clementina application/pdf http://hdl.handle.net/11336/141343 eng eng Springer info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/10.1007/s10750-020-04278-y info:eu-repo/semantics/altIdentifier/doi/10.1007/s10750-020-04278-y http://hdl.handle.net/11336/141343 Rojo, Javier Hernán; Rodriguez, Patricia Laura; Boy, Claudia Clementina; Morphological differentiation in the widespread fish Galaxias maculatus: do darker environments imply bigger eyes?; Springer; Hydrobiologia; 847; 13; 5-2020; 2863-2872 0018-8158 CONICET Digital CONICET info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ EYE SIZE GALAXIIDAE LIGHT ATTENUATION MOUTH LENGTH TIERRA DEL FUEGO https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1007/s10750-020-04278-y 2023-09-24T20:21:35Z The visual capacity of aquatic organisms is, in general, related to light penetration in the water. Therefore, aquatic environments that differ in color can potentially contribute to species polymorphism, especially in fish. In this study, we explore the relationship between light quality and intensity in water bodies and the eye and mouth size in Galaxias maculatus, one of the most widespread fish. Fish morphology was studied photographically, and the vertical attenuation coefficient of light (Kd) was measured in five aquatic systems: two humic lakes, two estuaries, and one river. Water color was also estimated as absorbance at 440 nm. In those environments with less light penetration and darker water color, we observed bigger eyes and, additionally, larger mouths. The darkness of water bodies was mainly related to water color associated with humic substances. As G. maculatus is known to be a visual predator, our results suggest that bigger eyes increase visual capacity in darker environments, which would result in improved feeding rates, also supported by larger mouth length. Fil: Rojo, Javier Hernán. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina Fil: Rodriguez, Patricia Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina. Universidad Nacional de Tierra del Fuego, Antártida e Islas del Atlántico Sur. Instituto de Ciencias Polares, Ambientales y Recursos Naturales; Argentina Fil: Boy, Claudia Clementina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina Article in Journal/Newspaper Antártida Tierra del Fuego CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Austral Argentina Rodriguez ENVELOPE(-56.720,-56.720,-63.529,-63.529) Hernán ENVELOPE(-62.867,-62.867,-64.900,-64.900) Hydrobiologia 847 13 2863 2872 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
EYE SIZE GALAXIIDAE LIGHT ATTENUATION MOUTH LENGTH TIERRA DEL FUEGO https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
spellingShingle |
EYE SIZE GALAXIIDAE LIGHT ATTENUATION MOUTH LENGTH TIERRA DEL FUEGO https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 Rojo, Javier Hernán Rodriguez, Patricia Laura Boy, Claudia Clementina Morphological differentiation in the widespread fish Galaxias maculatus: do darker environments imply bigger eyes? |
topic_facet |
EYE SIZE GALAXIIDAE LIGHT ATTENUATION MOUTH LENGTH TIERRA DEL FUEGO https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
description |
The visual capacity of aquatic organisms is, in general, related to light penetration in the water. Therefore, aquatic environments that differ in color can potentially contribute to species polymorphism, especially in fish. In this study, we explore the relationship between light quality and intensity in water bodies and the eye and mouth size in Galaxias maculatus, one of the most widespread fish. Fish morphology was studied photographically, and the vertical attenuation coefficient of light (Kd) was measured in five aquatic systems: two humic lakes, two estuaries, and one river. Water color was also estimated as absorbance at 440 nm. In those environments with less light penetration and darker water color, we observed bigger eyes and, additionally, larger mouths. The darkness of water bodies was mainly related to water color associated with humic substances. As G. maculatus is known to be a visual predator, our results suggest that bigger eyes increase visual capacity in darker environments, which would result in improved feeding rates, also supported by larger mouth length. Fil: Rojo, Javier Hernán. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina Fil: Rodriguez, Patricia Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina. Universidad Nacional de Tierra del Fuego, Antártida e Islas del Atlántico Sur. Instituto de Ciencias Polares, Ambientales y Recursos Naturales; Argentina Fil: Boy, Claudia Clementina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina |
format |
Article in Journal/Newspaper |
author |
Rojo, Javier Hernán Rodriguez, Patricia Laura Boy, Claudia Clementina |
author_facet |
Rojo, Javier Hernán Rodriguez, Patricia Laura Boy, Claudia Clementina |
author_sort |
Rojo, Javier Hernán |
title |
Morphological differentiation in the widespread fish Galaxias maculatus: do darker environments imply bigger eyes? |
title_short |
Morphological differentiation in the widespread fish Galaxias maculatus: do darker environments imply bigger eyes? |
title_full |
Morphological differentiation in the widespread fish Galaxias maculatus: do darker environments imply bigger eyes? |
title_fullStr |
Morphological differentiation in the widespread fish Galaxias maculatus: do darker environments imply bigger eyes? |
title_full_unstemmed |
Morphological differentiation in the widespread fish Galaxias maculatus: do darker environments imply bigger eyes? |
title_sort |
morphological differentiation in the widespread fish galaxias maculatus: do darker environments imply bigger eyes? |
publisher |
Springer |
url |
http://hdl.handle.net/11336/141343 |
long_lat |
ENVELOPE(-56.720,-56.720,-63.529,-63.529) ENVELOPE(-62.867,-62.867,-64.900,-64.900) |
geographic |
Austral Argentina Rodriguez Hernán |
geographic_facet |
Austral Argentina Rodriguez Hernán |
genre |
Antártida Tierra del Fuego |
genre_facet |
Antártida Tierra del Fuego |
op_relation |
info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/10.1007/s10750-020-04278-y info:eu-repo/semantics/altIdentifier/doi/10.1007/s10750-020-04278-y http://hdl.handle.net/11336/141343 Rojo, Javier Hernán; Rodriguez, Patricia Laura; Boy, Claudia Clementina; Morphological differentiation in the widespread fish Galaxias maculatus: do darker environments imply bigger eyes?; Springer; Hydrobiologia; 847; 13; 5-2020; 2863-2872 0018-8158 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1007/s10750-020-04278-y |
container_title |
Hydrobiologia |
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847 |
container_issue |
13 |
container_start_page |
2863 |
op_container_end_page |
2872 |
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1779310411410046976 |