Hydrobiologia

, Volume 632, Issue 1, pp 355–358 | Cite as

Grazing rates of Elysia tomentosa on native and introduced Caulerpa taxifolia

  • Dana D. Burfeind
  • Ian R. Tibbetts
  • James W. Udy
Short research note

Abstract

The marine alga Caulerpa taxifolia Vahl (C. Agardh), recognized globally as one of the most prolific non-native species introductions, has been introduced to several temperate locations from where it has since rapidly expanded. C. taxifolia is protected by a toxin (terpenoid) in its tissues that limits grazing by native herbivores. Sacoglossan molluscs of the genus Elysia are among the few organisms that graze C. taxifolia; however, little is known about their feeding ecology. In the current study, we quantified the grazing rates of Elysia tomentosa on native C. taxifolia (Moreton Bay, Queensland) and introduced C. taxifolia (Botany Bay and Lake Conjola, New South Wales). Grazing rates were similar at Moreton Bay sites and Botany Bay; however, they were significantly lower in Lake Conjola. At the maximum observed grazing rate, slugs ate their body weight in C. taxifolia (dry weight) every 18–24 h. Differences in grazing rates between locations may be explained by differences in C. taxifolia morphology rather than native or introduced origin.

Keywords

Elysia tomentosa Caulerpa taxifolia Introduced species Grazing 

Notes

Acknowledgements

We thank Kimberley Townsend and the staff of Moreton Bay Research Station for assistance with lab trials and Romain Mari for assistance with field collections. We acknowledge funding provided by the Moreton Bay Research Station Community Research Scholarship and the Tangalooma Research Foundation. In addition, we thank the two anonymous reviewers whose thoughtful comments greatly improved the earlier drafts of this manuscript.

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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • Dana D. Burfeind
    • 1
  • Ian R. Tibbetts
    • 2
  • James W. Udy
    • 1
    • 3
  1. 1.Water Studies, School of EngineeringUniversity of QueenslandBrisbaneAustralia
  2. 2.Centre for Marine StudiesUniversity of QueenslandBrisbaneAustralia
  3. 3.SEQWaterBrisbaneAustralia

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