A seasnake's colour affects its susceptibility to algal fouling

R. Shine*, F. Brischoux, A. J. Pile

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

Evolutionary transitions from terrestrial to aquatic life modify selective forces on an animal's coloration. For example, light penetrates differently through water than air, and a new suite of predators and visual backgrounds changes the targets of selection. We suggest that an aquatic animal's coloration may also affect its susceptibility to algal fouling. In a colour-polymorphic field population of seasnakes (Emydocephalus annulatus) in New Caledonia, black individuals supported higher algal cover than did banded conspecifics. In experimental tests, black snake models (plastic tubes) accumulated more algae than did banded models. Algal cover substantially reduced snake activity (in the field) and swimming speeds (in the laboratory). Effects of algal cover on a snake's hydrodynamic efficiency and/or its rate of cutaneous gas exchange thus may impose selection on the colours of aquatic organisms.

Original languageEnglish
Pages (from-to)2459-2464
Number of pages6
JournalProceedings of the Royal Society B: Biological Sciences
Volume277
Issue number1693
DOIs
Publication statusPublished - 14 Apr 2010
Externally publishedYes

Keywords

  • algal settlement
  • aquatic
  • biofouling
  • constraints
  • marine
  • snake

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