Poster Presentation 2024 Australian Marine Sciences Association Annual Meeting combined with NZMSS

Oyster beds for sleepy fish? – nocturnal versus diurnal fish community use of a remnant oyster reef (#607)

Stephanie F Bagala 1 , Melanie Bishop 1 , Jane Williamson 1
  1. Macquarie University, North Ryde, NSW, Australia

In response to growing recognition of the extent of oyster reef loss, and the UN Decade on Ecological Restoration, oyster reef restoration is scaling up in Australia. The business case for, and goals of oyster reef restoration projects are often framed around the habitat and ecosystem service provisioning of remnant oyster reefs. This includes habitat and food provisioning to fish communities that contribute to valuable recreational and commercial fisheries. Our knowledge, to date, of fish communities using oyster reefs has come from surveys completed on remnant reefs during daytime high tides. To provide a complete picture of the fish communities that use oyster reefs, information is needed on fish utilisation of reefs at night, and across the tidal cycle.  To compare fish communities utilising oyster reefs between day and night, we established illuminated, unbaited remote underwater video stations (RUVS) on oyster reefs and surrounding soft-bottomed habitat at Towra Point, NSW, Australia. In this talk we share the results of this study. This information will be useful in informing the goals of future oyster reef restoration projects in Australia.