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SARDI Seminar Series

SARDI science seminars are usually held every second Thursday at 1pm in the lecture theatre, SARDI Aquatic Sciences, 2 Hamra Ave, West Beach, SA.

The seminars are presented by SARDI Aquatic Sciences staff as well as guest speakers from aquatic research partners.

The seminars are focused on broadly communicating our research findings, identifying new opportunities, and developing synergies with other researchers so that we can collectively face the modern challengers in the most successful and strategic manner possible.

Next seminar - 1pm, 29 August 2013

Sclerochronological analyses: Understanding the environmental histories of fish and change in the aquatic environment, will be presented by Christopher Izzo, Southern Seas Ecology Laboratories, School of Earch and Environmental Sciences, the University of Adelaide, on Thursday 29th August at 1pm.

Lunch to follow.

Abstract:
Tree-ring analysis (dendrochronology) has been widely used to reconstruct various aspects of population age structure, community disturbance, and climate. In the aquatic environment, the calcified structures of organisms (e.g. otoliths, vertebrae, bivalve shells, coral skeletons, and teeth) form analogous growth increment patterns to tree-rings. These increments form as a result of seasonal variations in growth rates and have long been utilised as a means of determining the population age structure of marine organisms. The widths of growth increments have been shown to correlate to indices of environmental (atmospheric and hydrological) variability, including temperature. Consequently, these structures provide a means for developing sclerochronologies for aquatic organisms, such as bivalves (shells), teleost fishes (otoliths) and corals (skeletons).

In this presentation, I will discuss some of the sclerochronological research being undertaken at the Southern Seas Ecology Laboratories at the University of Adelaide. Employing a range of methodologies, researchers at the SSEL are using sclerochronological data sets to examine the effects of environmental change on the biology of aquatic organisms, the reconstruction of past climates, as well as estimating historical assemblages of aquatic biota. Finally, areas of future research will be highlighted.