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OzCast

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by OzFish Unlimited

5.0(13 reviews)

16 episodes

Updated Weekly

Accepts GuestsHas SponsorsLocation 🇦🇺

Podcast Overview

OzCast is the official podcast platform of conservation charity, OzFish Unlimited. OzCast features leading scientists, fish ecologists, and industry experts revealing findings, explaining research, and communicating important issues affecting the health of Australian waterways and their surrounding environments. By drawing on their years of experience both in the field and the lab, OzCast provides a look below the surface into the historical, cultural and scientific world that surrounds our rivers, creeks, oceans and lakes.

Language

🇺🇲

Publishing Since

3/17/2023

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Recent Episodes

December 16, 2025

Saving the Greynurse Shark

<span style= "font-size: 12.0pt; line-height: 115%; font-family: 'Times New Roman',serif; mso-fareast-font-family: Aptos; mso-fareast-theme-font: minor-latin; mso-bidi-theme-font: minor-bidi; mso-ansi-language: EN-AU; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"> In this episode of OzCast, marine scientist Dr David Harasti explains why the Greynurse Shark is one of Australia's most vulnerable ocean species, and how simple changes in the way we fish can have a serious impact on their survival. He also explains the role these sharks play in the ocean's ecosystem and how fishers, scientists and conservation groups can work together to protect these important predators. <span style= "font-size: 12.0pt; line-height: 115%; font-family: 'Times New Roman',serif; mso-fareast-font-family: Aptos; mso-fareast-theme-font: minor-latin; mso-bidi-theme-font: minor-bidi; mso-ansi-language: EN-AU; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;"> https://ozfish.org.au/ozcast/episode-15/

May 22, 2024

A World Within: Unveiling the Secrets of Saltmarsh

<div class="OutlineElement Ltr SCXW61401135 BCX0"> In this episode of OzCast, Troy Gaston dives beneath the surface of the often-overshadowed marine habitat of Saltmarsh. Being the unassuming heros of our coast, Troy explains that saltmarshes are in fact ecological powerhouses playing a pivotal role in coastal ecosystems. After spending over 25 years looking into their role, Troy uncovers his most pivotal research and findings in respect of saltmarshes impact on the food chain, their role in the reproduction of marine species and protecting coastal erosion. </div> <div class="OutlineElement Ltr SCXW61401135 BCX0"> <span class="NormalTextRun SCXW61401135 BCX0" data-ccp-charstyle="normaltextrun" data-ccp-charstyle-defn= "{"ObjectId":"c0ba444d-1bf4-49fa-8fd7-a35c7e01418f|24","ClassId":1073872969,"Properties":[469775450,"normaltextrun",201340122,"1",134233614,"true",469778129,"normaltextrun",335572020,"1",469778324,"Default Paragraph Font"]}"> Saltmarshes, the unassuming heroes of our coasts, are more than just wetlands. They are biodiversity hotspots and crucial buffers against coastal erosion. Troy's work uncovers their role in carbon sequestration and as a nursery for myriad marine life, highlighting their global environmental impact.<span class= "NormalTextRun SCXW61401135 BCX0" data-ccp-charstyle="eop" data-ccp-charstyle-defn= "{"ObjectId":"c0ba444d-1bf4-49fa-8fd7-a35c7e01418f|25","ClassId":1073872969,"Properties":[469775450,"eop",201340122,"1",134233614,"true",469778129,"eop",335572020,"1",469778324,"Default Paragraph Font"]}">  </div>

April 3, 2024

Now You See Me: Why Small-Bodied Fish Are Vital To The Murray-Darling Basin

Join us on this episode of OzCast as we look beneath the surface at the often-overlooked realm of small-bodied threatened fish species in Australian waterways with Dr. Nick Whiterod, a seasoned marine ecologist with over twenty years of dedicated research and conservation efforts. Dr. Nick Whiterod holds a PhD from Charles Sturt University, assessing the bioenergetic implications of large impoundments on Murray cod. His career has been marked by a profound commitment to the conservation of Australia’s freshwater ecosystems, particularly focusing on small-bodied fish and crayfish species. His work extends beyond mere research; he has played a pivotal role in the national conservation listing of more than 50 freshwater species. <div class="small-12 large-6 cell"> Dr. Whiterod’s expertise is not limited to conservation alone; he is widely recognised for his skill in species reintroduction and managing complex ecosystems. His approaches and methods in reintroducing species to their native habitats have contributed significantly to the recovery of threatened species like the Southern Purple Spotted Gudgeon, Southern Pygmy Perch, Yarra Pygmy Perch, and Murray Hardyhead. During the podcast, Nick explains the role these species have as vital indicators of ecosystem health and the concerning implications of their decline. The conversation extends to how the restoration of these fish populations can benefit the basin’s overall health, and what their presence, or absence, reveals about water quality and environmental management. A focus of the discussion is the rediscovery of certain fish species in the Murray-Darling Basin, particularly the Southern Purple Spotted Gudgeon. Dr. Whiterod shares how these species, once common, have become rare in certain areas, with occasional surprising reappearances. The impact of habitat changes due to events like the Millennium drought and human efforts in conservation, including captive breeding and reintroduction, are examined. He also touches on the intriguing presence of northern fish species, like Barramundi, in southern waterways, raising questions about their survival and adaptation in unfamiliar habitats. In looking to the future, the podcast delves into the threats posed by introduced species on native fish populations, focusing on the predatory habits of Redfin Perch and Trout. Dr. Whiterod discusses the threat to native species such as the Purple Spotted Gudgeon and Pygmy Perch, their dwindling numbers, and the factors contributing to their decline, which includes habitat destruction and disease. </div> <div class="small-12 large-6 cell"> Throughout the episode, Nick provides an insight into the work he has completed in this area, speaking on the importance of maintaining ‘insurance populations’ to safeguard against potential losses down the track. Emphasising the importance of local conservation efforts, Dr. Whiterod underscores the role of individuals and community groups in protecting vulnerable populations, encouraging listeners to support threatened species in their local waterways. An underlying theme in the interview is the bridging of the gap between scientific research and community involvement. Dr. Whiterod stresses the importance of translating scientific knowledge into actionable strategies that individuals and communities can undertake. He emphasises that conservation is not just the responsibility of scientists and policymakers but is a collective effort that requires widespread community engagement. Dr. Whiterod expresses cautious optimism about the future of Australia’s aquatic ecosystems. He acknowledges the challenges posed by climate change and habitat loss, but remains hopeful due to increasing awareness and ongoing conservation efforts. His message underscores the importance of continued research, public education, and dedicated conservation actions to protect these vital ecosystems. </div>

16 total episodes available

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What is OzCast?: OzCast is the official podcast platform of conservation charity, OzFish Unlimited. OzCast features leading scientists, fish ecologists, and industry experts revealing findings, explaining research, and communicating important issues affecting the health of Australian waterways and their surrounding environments. By drawing on their years of experience both in the field and the lab, OzCast provides a look below the surface into the historical, cultural and scientific world that surrounds our rivers, creeks, oceans and lakes.
How often does this podcast release new episodes?: This podcast updates weekly.
Where can I listen to this podcast?: This podcast is available on 9 platforms including Apple Podcasts, Spotify, and more. You can also use the RSS feed directly.
Does this podcast accept guests?: Yes, this podcast regularly features guests.

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