Defecation behaviour of the Lined Bristletooth Surgeonfish Ctenochaetus striatus (Acanthuridae)

Some terrestrial animal species like badgers, ants and geckos use specific places for defecationCommunicated by Geology Editor Dr Bernhard Riegl. R

R. Krone

2008

Scholarcy highlights

  • Some terrestrial animal species like badgers, ants and geckos use specific places for defecationCommunicated by Geology Editor Dr Bernhard Riegl.R
  • Each defecation comprise a percentage of the total home range and was not used for other purposes
  • Neighbours and individuals inhabiting almost the same range usually shared the same area for defecation, but the individual areas did not overlap
  • C. striatus individuals that were observed on the continuous reef flat nearby seemed to avoid the shallow backreef area, but defecated on the seaward edge at distinct spots
  • All observed individuals spent most time above rocky substrate, but defecated exclusively over sand, defecating significantly more often over sand than predicted by their preferred residence duration
  • In a larger home range fish use any sandy substrate away from the reef. Notwithstanding these differences, there is a similar pattern for all these species of defecating away from the foraging area, which may be a function of removing sediment to improve the growth of the grazer’s food sources (C. striatus diet includes inorganic matter;, and/or by defecating away from foraging areas the risk of re-infection with endoparasites may be reduced
  • Share of defecation spot of the whole home range

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