Journal of Plankton Research Vol.24 no.7 pp.729-734, 2002
© Oxford University Press 2002
SHORT COMMUNICATION |
Heterogeneous zooplankton distribution in a ship's ballast tanks
1 Department Of Zoology, University Of Tasmania, Hobart, Tasmania, Australia, And 2 Centre For Research On Introduced Marine Pests, C.S.I.R.O. Marine Research, Hobart, Tasmania Australia 7001
* Current Address: Marine Invasions Research Laboratory, Smithsonian Environmental Research Center, Box 28, Edgewater, Md 21037 Usa; E-Mail: murphy{at}serc.si.edu
We examined the vertical distribution of zooplankton in a ship's ballast water. Some crustacean taxa were more abundant at 0.5 m and 2 m than at 6 m depths. Non-random distributions affect population size estimations and are an important consideration for invasion risk assessment.