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Abstract

The breeding distribution of the Black Swan in
Tasmania is given and the breeding history of the
species over three years in the principal breeding
area at Moulting Lagoon is described. The incubation
period was found to be 39+ 2 days and
cygnets fly 60 days after the appearance of juvenile
plumage. Floods are the main source of egg
mortality and other factors are relatively unimportant.
Direct observation and statistical
calculations were used to estimate the annual
cygnet production. The statistical methods gave
widely divergent estimates. Shooting over the
breeding ground has an adverse effect upon breeding,
upsetting pair formation. Restriction of this
shooting has re1sulted in a greater cygnet production.
Flooding and autodestruction of habitat
are important factors in breeding success and
recommendations for the management of the
species are given.

Item Type:	Article
Authors/Creators:	Guiler, ER
Keywords:	Royal Society of Tasmania, RST, Van Diemens Land, natural history, science, ecology, taxonomy, botany, zoology, geology, geography, papers & proceedings, Australia, UTAS Library
Journal or Publication Title:	Papers and Proceedings of the Royal Society of Tasmania
ISSN:	0080-4703
Collections:	Royal Society Collection > Papers & Proceedings of the Royal Society of Tasmania
Additional Information:	Copyright Royal Society of Tasmania
Item Statistics:	View statistics for this item

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