by Meghan Holst and Amani Webber-Schultz
Meghan and Amani are 2 shark researchers exploring sharks and their relatives! Get ready to jump in every-other-week to the world of sharks where Meghan and Amani break down the science with some of the legends in the field.
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Publishing Since
5/4/2021
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March 18, 2024
<p>Did you know that shark body form can change as they grow? Why does that happen? Why does it matter? Find out this week on our episode investigating these questions of bull sharks with Joel Gayford! </p> <p><strong>Title:</strong> <a href="https://onlinelibrary.wiley.com/doi/full/10.1002/jmor.21673" target="_blank" rel="noopener noreferer"><em>Ontogenetic Shifts in body form in the bull shark Carcharhinus leucas</em></a> </p> <p><strong>Summary:</strong> It is believed that body growth is strongly correlated to trophic and spatial ecology through ontogeny, or as a shark ages. Gayford et al. used bull sharks as their study species to better understand morphological growth at many different locations along a shark's body. They found shifts in functional demands across the body through ontogeny, seemingly driven by selective pressures relating to trophic and spatial ecology. They also found significant differences in scaling trends between life stages and sexes. They ultimately discuss the implications of their results for existing ecomorphological hypotheses and provide a robust study to add to much needed research in this area. You can follow Joel Gayford @sharkmeasurements on instagram</p> <p><br></p> <p><a href="https://www.patreon.com/thesharkpediapodcast">Join our Patreon</a></p> <p><a href="https://www.instagram.com/sharkpediapod/">Follow us on Instagram @Sharkpediapod</a></p> <p><a href="https://docs.google.com/forms/d/e/1FAIpQLSduXVjArd6FvJRWf6KpyB73Wgugan-41gjyz3g17zSf5_pPug/viewform?usp=sf_link">Submit an article for us to review on the podcast!</a></p> <p><br> </p>
March 4, 2024
<p>Juvenile shark presence in an area does NOT mean that that area is a shark pupping or nursery ground. So how do we know what actually makes a shark nursery ground? What even IS a nursery ground? Is it different than a pupping ground? Why does any of this matter? Find out this week with our special guest, Dr. Michelle Heupel! </p> <p><br></p> <p>Dr. Heupel joins us to talk about her article, "<a href="https://www.int-res.com/articles/meps2007/337/m337p287.pdf" target="_blank" rel="noopener noreferer">Shark nursery areas: concepts, definition, characterization and assumptions</a>" (Heupel et al. 2007). </p> <p><br></p> <p><strong>Article Summary</strong>: </p> <p>Shark nursery habitats are critical areas that sharks rely on for their early life stages. However, the criteria defining shark nursery grounds has been inconsistent through history. These inconsistencies can make management strategies more difficult, as some definitions could imply that all coastal areas are nursery habitats, and other definitions are insufficient. In this study, Heupel et al. propose a new definition for shark nursery habitats that will more accurately pinpoint Essential Fish Habitat. That definition is: (1) sharks are more commonly encountered in the area than other areas; (2) sharks have a tendency to remain or return for extended periods; and (3) the area or habitat is repeatedly used across years. These criteria make the definition of shark nursery areas more compatible with those for other aquatic species. The improved definition of this concept will provide more valuable information for fisheries managers and shark biologists. </p> <p><br></p> <p>You can follow Dr. Heupel @michelleheupel on instagram, and follow her work on <a href="https://www.researchgate.net/profile/Michelle-Heupel" target="_blank" rel="noopener noreferer">Research Gate</a> and <a href="https://scholar.google.com.au/citations?user=Myv0DeYAAAAJ&hl=en" target="_blank" rel="noopener noreferer">Google Scholar</a>!</p> <p><br></p> <p><a href="https://www.patreon.com/thesharkpediapodcast">Join our Patreon</a></p> <p><a href="https://www.instagram.com/sharkpediapod/">Follow us on Instagram @Sharkpediapod</a></p> <p><a href="https://docs.google.com/forms/d/e/1FAIpQLSduXVjArd6FvJRWf6KpyB73Wgugan-41gjyz3g17zSf5_pPug/viewform?usp=sf_link">Submit an article for us to review on the podcast!</a></p>
March 2, 2024
This week Amani and Meghan discuss sand tiger sharks from the Eocene with Dr. Sora Kim! We explore the ecology and environment of sand tiger sharks during the Eocene, and can even explore climate change during the Eocene using sand tiger teeth fossils! This discussion was guided around Dr. Sora Kim's publication, "Probing the Ecology and Climate of the Eocene Southern Ocean With Sand Tiger Sharks Striatolamia macrota". Get ready to learn about some incredible things we can learn about the climate during the Eocene using stable isotope analysis of teeth from extinct sand tiger sharks! You can connect with Dr. Sora Kim on Twitter @SoraLKim This episode was edited by Kaela Shoe Follow Sharkpedia at @SharkpediaPod on Instagram and Twitter Connect with Sharkpedia: linktr.ee/sharkpediapod Email: [email protected]
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