Convergence in feeding posture occurs through different genetic loci in independently evolved cave populations of Astyanax mexicanus

Johanna E. Kowalko, Nicolas Rohner, Tess A. Linden, Santiago B. Rompani, Wesley C. Warren, Richard Borowsky, Clifford J. Tabin, William R. Jeffery, Masato Yoshizawa

Research output: Contribution to journalArticle

Abstract

When an organism colonizes a new environment, it needs to adapt both morphologically and behaviorally to survive and thrive. Although recent progress has been made in understanding the genetic architecture underlying morphological evolution, behavioral evolution is poorly understood. Here, we use the Mexican cavefish, Astyanax mexicanus, to study the genetic basis for convergent evolution of feeding posture. When river-dwelling surface fish became entrapped in the caves, they were confronted with dramatic changes in the availability and type of food source and in their ability to perceive it. In this setting, multiple independent populations of cavefish exhibit an altered feeding posture compared with their ancestral surface forms. We determined that this behavioral change in feeding posture is not due to changes in cranial facial morphology, body depth, or to take advantage of the expansion in the number of taste buds. Quantitative genetic analysis demonstrates that two different cave populations have evolved similar feeding postures through a small number of genetic changes, some of which appear to be distinct. This work indicates that independently evolved populations of cavefish can evolve the same behavioral traits to adapt to similar environmental challenges by modifying different sets of genes.

Original languageEnglish (US)
Pages (from-to)16933-16938
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume110
Issue number42
DOIs
StatePublished - Oct 15 2013

Fingerprint

Genetic Loci
Posture
Population
Taste Buds
Rivers
Fishes
Food
Genes

ASJC Scopus subject areas

  • General

Cite this

Convergence in feeding posture occurs through different genetic loci in independently evolved cave populations of Astyanax mexicanus. / Kowalko, Johanna E.; Rohner, Nicolas; Linden, Tess A.; Rompani, Santiago B.; Warren, Wesley C.; Borowsky, Richard; Tabin, Clifford J.; Jeffery, William R.; Yoshizawa, Masato.

In: Proceedings of the National Academy of Sciences of the United States of America, Vol. 110, No. 42, 15.10.2013, p. 16933-16938.

Research output: Contribution to journalArticle

Kowalko, Johanna E. ; Rohner, Nicolas ; Linden, Tess A. ; Rompani, Santiago B. ; Warren, Wesley C. ; Borowsky, Richard ; Tabin, Clifford J. ; Jeffery, William R. ; Yoshizawa, Masato. / Convergence in feeding posture occurs through different genetic loci in independently evolved cave populations of Astyanax mexicanus. In: Proceedings of the National Academy of Sciences of the United States of America. 2013 ; Vol. 110, No. 42. pp. 16933-16938.
@article{75bf97555e9048aba085dd7733fca554,
title = "Convergence in feeding posture occurs through different genetic loci in independently evolved cave populations of Astyanax mexicanus",
abstract = "When an organism colonizes a new environment, it needs to adapt both morphologically and behaviorally to survive and thrive. Although recent progress has been made in understanding the genetic architecture underlying morphological evolution, behavioral evolution is poorly understood. Here, we use the Mexican cavefish, Astyanax mexicanus, to study the genetic basis for convergent evolution of feeding posture. When river-dwelling surface fish became entrapped in the caves, they were confronted with dramatic changes in the availability and type of food source and in their ability to perceive it. In this setting, multiple independent populations of cavefish exhibit an altered feeding posture compared with their ancestral surface forms. We determined that this behavioral change in feeding posture is not due to changes in cranial facial morphology, body depth, or to take advantage of the expansion in the number of taste buds. Quantitative genetic analysis demonstrates that two different cave populations have evolved similar feeding postures through a small number of genetic changes, some of which appear to be distinct. This work indicates that independently evolved populations of cavefish can evolve the same behavioral traits to adapt to similar environmental challenges by modifying different sets of genes.",
author = "Kowalko, {Johanna E.} and Nicolas Rohner and Linden, {Tess A.} and Rompani, {Santiago B.} and Warren, {Wesley C.} and Richard Borowsky and Tabin, {Clifford J.} and Jeffery, {William R.} and Masato Yoshizawa",
year = "2013",
month = "10",
day = "15",
doi = "10.1073/pnas.1317192110",
language = "English (US)",
volume = "110",
pages = "16933--16938",
journal = "Proceedings of the National Academy of Sciences of the United States of America",
issn = "0027-8424",
number = "42",

}

TY - JOUR

T1 - Convergence in feeding posture occurs through different genetic loci in independently evolved cave populations of Astyanax mexicanus

AU - Kowalko, Johanna E.

AU - Rohner, Nicolas

AU - Linden, Tess A.

AU - Rompani, Santiago B.

AU - Warren, Wesley C.

AU - Borowsky, Richard

AU - Tabin, Clifford J.

AU - Jeffery, William R.

AU - Yoshizawa, Masato

PY - 2013/10/15

Y1 - 2013/10/15

N2 - When an organism colonizes a new environment, it needs to adapt both morphologically and behaviorally to survive and thrive. Although recent progress has been made in understanding the genetic architecture underlying morphological evolution, behavioral evolution is poorly understood. Here, we use the Mexican cavefish, Astyanax mexicanus, to study the genetic basis for convergent evolution of feeding posture. When river-dwelling surface fish became entrapped in the caves, they were confronted with dramatic changes in the availability and type of food source and in their ability to perceive it. In this setting, multiple independent populations of cavefish exhibit an altered feeding posture compared with their ancestral surface forms. We determined that this behavioral change in feeding posture is not due to changes in cranial facial morphology, body depth, or to take advantage of the expansion in the number of taste buds. Quantitative genetic analysis demonstrates that two different cave populations have evolved similar feeding postures through a small number of genetic changes, some of which appear to be distinct. This work indicates that independently evolved populations of cavefish can evolve the same behavioral traits to adapt to similar environmental challenges by modifying different sets of genes.

AB - When an organism colonizes a new environment, it needs to adapt both morphologically and behaviorally to survive and thrive. Although recent progress has been made in understanding the genetic architecture underlying morphological evolution, behavioral evolution is poorly understood. Here, we use the Mexican cavefish, Astyanax mexicanus, to study the genetic basis for convergent evolution of feeding posture. When river-dwelling surface fish became entrapped in the caves, they were confronted with dramatic changes in the availability and type of food source and in their ability to perceive it. In this setting, multiple independent populations of cavefish exhibit an altered feeding posture compared with their ancestral surface forms. We determined that this behavioral change in feeding posture is not due to changes in cranial facial morphology, body depth, or to take advantage of the expansion in the number of taste buds. Quantitative genetic analysis demonstrates that two different cave populations have evolved similar feeding postures through a small number of genetic changes, some of which appear to be distinct. This work indicates that independently evolved populations of cavefish can evolve the same behavioral traits to adapt to similar environmental challenges by modifying different sets of genes.

UR - http://www.scopus.com/inward/record.url?scp=84885791466&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84885791466&partnerID=8YFLogxK

U2 - 10.1073/pnas.1317192110

DO - 10.1073/pnas.1317192110

M3 - Article

VL - 110

SP - 16933

EP - 16938

JO - Proceedings of the National Academy of Sciences of the United States of America

JF - Proceedings of the National Academy of Sciences of the United States of America

SN - 0027-8424

IS - 42

ER -