Differential predation alters pigmentation in threespine stickleback (Gasterosteus aculeatus)

Gygax, Michelle; Rentsch, Ana K.; Rudman, Seth M.; Rennison, Diana J. (2018). Differential predation alters pigmentation in threespine stickleback (Gasterosteus aculeatus). Journal of Evolutionary Biology, 31(10), pp. 1589-1598. Wiley 10.1111/jeb.13354

[img] Text
Gygax et al 2018 JEB.pdf - Published Version
Restricted to registered users only
Available under License Publisher holds Copyright.

Download (380kB) | Request a copy

Animal pigmentation plays a key role in many biological interactions, including courtship and predator avoidance. Sympatric benthic and limnetic ecotypes of threespine stickleback (Gasterosteus aculeatus) exhibit divergent pigment patterns. To test whether differential predation by cutthroat trout contributes to the differences in pigmentation seen between the ecotypes, we used a within‐generation selection experiment on F2 benthic–limnetic hybrids. After 10 months of differential selection, we compared the pigmentation of fish under trout predation to control fish not exposed to trout predation. We found that stickleback exhibited more lateral barring in ponds with trout predation. Ponds with trout were also less turbid, and a greater degree of barring was negatively correlated with the magnitude of turbidity across pond replicates. A more benthic diet, a proxy for habitat use, was also correlated with greater lateral barring and green dorsal pigmentation. These patterns suggest that differential exposure to cutthroat trout predation may explain the divergence in body pigmentation between benthic and limnetic ecotypes.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE) > Evolutionary Ecology
08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE)

UniBE Contributor:

Gygax, Michelle; Rentsch, Ana Katinka and Rennison, Diana Jessie

Subjects:

500 Science > 570 Life sciences; biology

ISSN:

1010-061X

Publisher:

Wiley

Language:

English

Submitter:

Catherine Peichel

Date Deposited:

04 May 2020 12:02

Last Modified:

04 May 2020 12:02

Publisher DOI:

10.1111/jeb.13354

BORIS DOI:

10.7892/boris.143430

URI:

https://boris.unibe.ch/id/eprint/143430

Actions (login required)

Edit item Edit item
Provide Feedback