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Ocean Science Radio

Ocean Science Radio

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Ocean Science Radio is a joint project between Andrew Kornblatt, founder and host of the Online Ocean Symposium, and Naomi Frances Farabaugh of FIU. Previous co-host was Samantha Wishnak, Digital Media Coordinator at Ocean Exploration Trust. The program will focus on and highlight the latest and greatest ocean science stories that the world has to offer.All rights reserved Ciencia Ciencias Biológicas Historia Natural Naturaleza y Ecología
Episodios
  • Ocean Lovin - Free Baby-Making - Walking Sharks Break the Rules of Reproduction

    Ocean Lovin - Free Baby-Making - Walking Sharks Break the Rules of Reproduction
    Mar 1 2026
    Episode Description Making babies is expensive. For pretty much every species on the planet, reproduction is supposed to be the ultimate metabolic investment—a massive energy drain that can make organisms vulnerable to stress, predators, and environmental change. Except there's a small shark walking around the Great Barrier Reef that apparently didn't get the memo. In this episode of our Ocean Lovin' series, we explore groundbreaking research from James Cook University that's forcing scientists to completely rethink what they know about the costs of reproduction. Epaulette sharks—those amazing little "walking sharks" that can literally stroll across reef flats on their fins—can produce complex egg cases with developing embryos inside without any measurable increase in energy use. Zero. Zilch. Nada. It's like building a house without buying any extra lumber. Join hosts Andrew Kornblatt and Dr. Frances Farabaugh, along with returning guest co-host Dr. Skylar Bayer, as we dive into this surprising discovery with Professor Jodie Rummer from James Cook University. We'll explore how her team measured something no one had measured before—the metabolic cost of egg-laying in sharks—and what they found challenges fundamental assumptions about reproduction in the ocean. We'll learn about the "pay as you go" hypothesis, discover why a tiny organ might be working overtime without changing the whole shark's energy budget, and explore what this means for sharks facing climate change. From the controlled environment of the lab to wild populations scattered across the Great Barrier Reef, this research reveals that evolution has equipped some species with surprising tools for survival that we're only beginning to understand. Content Advisory: This Ocean Lovin' episode deals with mature subjects related to marine reproduction. Please listen to the full episode before sharing with younger audiences. Featured Guest Professor Jodie Rummer Professor of Marine Biology, James Cook University, AustraliaConservation physiologist specializing in sharks and coral reef fishesLeads shark physiology research team at JCU's Marine and Aquaculture Research FacilityMaintains a breeding colony of epaulette sharks for multi-generational researchExpert in how marine organisms cope with climate change stressors (temperature, ocean acidification, low oxygen) Key Topics Covered The Discovery First direct measurement of metabolic costs of egg-laying in sharksCompletely flat metabolic rate across reproductive cycle—no energy spike37 trials, nearly 200 eggs, almost 100 reproductive cycles The Science How scientists measure metabolic rate through oxygen uptakeThe "pay as you go" hypothesis: income breeding vs. stored energyThe nidamental gland paradox: tiny organ, massive outputBlood chemistry and hormone stability during reproduction Epaulette Shark Biology One of nine "walking shark" species with modified pectoral finsCan survive zero oxygen conditions for several hoursEndemic to Great Barrier Reef, living in extreme reef flat environmentsProduce two eggs every ~19 days during breeding seasonFour-month embryonic development period Climate Change Implications Challenging the assumption that "reproduction will be the first thing to go" under stressPotential resilience in warming oceans—but limits unknownEffects of elevated temperatures on embryo development and hatchling sizeImportance of protecting critical habitats where adaptations can function Future Research Directions Testing upper limits of reproductive efficiency under warmingLocal adaptation across Great Barrier Reef populationsImmune function in mothers and hatchlings under stressApplications to other shark species and conservation strategies Featured Research Primary Study: Wheeler, C.R., Awruch, C.A., Mandelman, J.W., & Rummer, J.L. (2025). "Assessing the metabolic and physiological costs of oviparity in the epaulette shark (Hemiscyllium ocellatum)." Biology Open, 14(11). DOI: 10.1242/bio.062076 Lead Author: Dr. Carolyn Wheeler (recent JCU PhD graduate) Resources & Links Research Institution: James Cook University Marine and Aquaculture Research Facility, Townsville, AustraliaJCU Marine Biology Conservation Organizations: Great Barrier Reef Marine Park AuthorityIUCN Shark Specialist Group Press Coverage: JCU News ReleaseScienceDaily Article Episode Credits Hosts: Andrew Kornblatt - Climate and Ocean Communications Specialist, ProducerDr. Frances Farabaugh - Shark Ecologist, Aquanaut Guest Co-Host: Dr. Skylar Bayer - Marine Ecologist (Shellfish Population Dynamics, Fertilization Ecology, Science Communication) Featured Guest: Professor Jodie Rummer - James Cook University
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    28 m
  • Tending the Tides - Oregon's Mariculture Revolution

    Tending the Tides - Oregon's Mariculture Revolution
    Feb 3 2026
    90% of seafood consumed on the Oregon coast is imported, while most Oregon-caught seafood gets exported. This week, we explore how that's changing. We talk with Suzie O'Neill, Kaitlyn Rich, and Jon Bonkoski from Ecotrust, who just launched "Tending the Tides," a podcast about mariculture on the Oregon coast. Learn how oyster farmers became climate sentinels in 2007 when ocean acidification killed their larvae. Discover urchin divers using rock climbing techniques underwater in 50 pounds of lead, and how their catch feeds innovative closed-loop aquaculture systems growing seaweed and sea cucumbers. From selective breeding programs creating climate-resilient oysters to kelp forests buffering acidification, this episode reveals how Oregon is building regenerative ocean farming that honors Indigenous stewardship, avoids parachute science, and redefines what sustainable food systems look like. Featuring the Oregon Coastal Mariculture Collaborative's community-led approach to expanding "unfed aquaculture"—oysters and seaweed that grow without any inputs beyond what the ocean provides.
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    28 m
  • What We Don't Know About Deep-Sea Mining

    What We Don't Know About Deep-Sea Mining
    Dec 30 2025
    What happens when an entire industry rushes forward before science can catch up? In this episode of Ocean Science Radio, we sit down with Dr. Andrew Thaler, deep-sea ecologist and CEO of Blackbeard Biologic, to explore his groundbreaking report for the Convention on Migratory Species that reveals exactly how much we don't know about deep-sea mining's impacts on whales, dolphins, sharks, turtles, and other highly migratory species. While most deep-sea mining research has focused on the immediate destruction of seafloor ecosystems, Andrew's report exposes a more troubling reality: we have massive knowledge gaps about how mining operations—with their noise, sediment plumes, and habitat disruption—might affect species that travel thousands of miles across interconnected ocean basins. From sea turtles navigating by magnetic fields to whales relying on acoustic communication, these far-reaching impacts remain largely unstudied even as the industry accelerates toward commercial production. The conversation takes a timely turn as we discuss the Bureau of Ocean Energy Management's controversial Request for Information for mining in U.S. waters off the Commonwealth of the Northern Mariana Islands. Andrew breaks down why this represents a significant shift from international deep-sea mining debates, and what it means that communities near the Mariana Trench—with only a 30-day comment period and no guaranteed revenue sharing—are being asked to accept an industry that science hasn't fully evaluated. As the Trump administration pushes to fast-track deep-sea mining for critical minerals while international bodies like the CMS urge precaution, this episode asks the essential question: what's at stake when we mine what we haven't studied? Join us for a conversation that bridges cutting-edge marine science, environmental justice, and the real-world policy decisions happening right now in the deep ocean.
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    28 m
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