PRELIMINARY INVESTIGATIONS INTO THE MORPHOLOGY OF THE CRESTED TERN Sterna bergii IN SOUTH-EAST TASMANIA
| Posted: |
15/08/2021 |
| Author(s): |
Eric J. Woehler, Margaret Wakefield, William C. Wakefield |
Hierarchical cluster analysis of morphological data (total head length, exposed culmen and tarsus)
from 56 Crested Terns Sterna bergii from south-east Tasmania enabled the identification of an individual's
sex. Both total head length and exposed culmen can be used to differentiate the sexes as there
is no overlap present. Tarsal lengths, due to a large degree of overlap, are of limited use. Comparison
with unpublished morphological data from Western Australia indicates that a geographic variation
exists between populations in Australia. Future studies should collect morphological data in order to
describe the extent of this variation.
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