Michael C. Geddes

Learn More
Several limnological studies of Australian salt lakes have been made. Most relate to Victorian waters (reviewed by Williams 1978), but Bayly (1970) and De Deckker & Geddes (1980) have studied a number of (mostly) ephemeral salt lakes near the coast of south-eastern South Australia. Many similarities occur between lakes in these two regions, the only major(More)
Acid salt lakes are found in several regions of Australia but are uncommonly abundant in the Yilgarn Block area of southwestern Australia. The chemical properties of the acid salt lakes are in general similar to those of shallow ephemeral alkaline salt lakes found in adjacent regions except for having a higher hydrogen ion concentration and an absence of(More)
Giant Australian cuttlefish form a mass spawning aggregation at a single site in northern Spencer Gulf (NSG) in South Australia every austral winter. Samples of cuttlefish were collected from this region over three consecutive years. Analysis of regular growth increments in the cuttlebones of these individuals, revealed a polymorphism in growth pattern for(More)
A wooden framed enclosure screened by plastic sheeting is described. This was sited along the bank to alleviate circulation problems and to allow for easy construction, surveillance and maintenance and sampling. An aeration system was incorporated. The suitability of the enclosure for use in field experiments on fish and zooplankton was tested by using 10(More)
Brine shrimps of the genus Artemia are a major faunal element of saline lakes throughout the world. Presently the taxonomy of the genus is under review and what was once considered a single species, Artemia salina, appears to be several sibling species. In some cases chromosome number differs between sibling species causing reproductive isolation(More)
  • 1