Gentlemen of the Corax Episode 1: Winners and Losers of the Shark World

Рет қаралды 94

11 ай бұрын

Sharks and their relatives have endured, adapted to, conquered, and fallen countless struggles since their emergence hundreds of millions of years ago. In this first installment of a brand new series, Gentlemen of the Corax delves into various winners and losers from throughout the history of the Chondrichthyans. Join On Point Fossils owner/Elasmocast host Ben Goode, University of Alabama graduate student/extinct Chondrichthyan researcher Chase Egli, and New Jersey fossil collector and Rowan University Geology/Paleontology graduate Kyle Macauley on a lively debate featuring many of your favorite shark taxa!
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Пікірлер: 15

@lesofprimus1 11 ай бұрын

I listened to the whole video and it was extremely interesting... 👍👍

@elasmocast 11 ай бұрын

We’re glad you enjoyed it!

@chrisrego4856 11 ай бұрын

Not my Greenland boys Chase! Those parasites are the real winners, they chose a host that apparently never dies lol

@elasmocast 11 ай бұрын

Haha good point!

@thomasburley3 11 ай бұрын

It's an interesting point to touch on. Is a highly specialised Shark a winner because it's perfected it's niche, or is it a loser because it's not a generalist and is extremely sensitive to any change in it's environment.

@elasmocast 11 ай бұрын

I think that length of time within a particular niche and success in that niche would constitute whether a shark is a winner or loser. A successful generalist has greater potential for abundance and duration throughout time, making them an evolutionary winner.

@Dman9fp 24 күн бұрын

When environmental conditions are stable & productive- specialists thrive and are clear winners. When times are rough, specialists cannot maintain their success/ numbers as easily as generalists. All depends on the conditions, but sure if we must- the more widespread across time & space a species is (& how many species have evolved out of one subgroup, as the late paleontologist Stephen Gould has done to judge "success") may be a close to objective way in my opinion to judge/ measure

@Dman9fp 24 күн бұрын

But then again, is a super abundant single species more successful than less abundant subgroup but that are super diverse ( a lot of species within a subgroup) &/or occupy a lot of different niches? It can become a pretty subjective and possibly interesting debate I suppose

@mesozoicmarket 11 ай бұрын

Where would Xenacanths go?

@elasmocast 11 ай бұрын

Xenacanths became rapidly diverse and were apex predators in certain ecosystems such as freshwater environments, so I would consider them a winner, even though they aren’t very successful after the End-Permian Mass Extinction and become extinct in the Triassic.

@chrisrego4856 11 ай бұрын

Y'all dissing my boy Palaeocarcharodon! It was a pioneer! It got broad, serrated teeth before it was cool! It gambled its life savings but lost the bet. Should've waited. Imagine a bizarro world where archeocetes evolved sooner... Palaeocarcharodon was ahead of the curve! They were Streets ahead! (Nod to all of "Community" friends)

@elasmocast 11 ай бұрын

A gambler that lost is a loser! Haha Palaeocarcharodon did evolve too early for its own good; it’s crazy to think about all of the evolutionary possibilities if events had unraveled differently.

@Dman9fp 24 күн бұрын

Just an additional fact- Greenland sharks may live many hundreds of years but they live with Super Slow metabolism. So thet have quantity but at the cost of quality, at least of aesthetics of being a hyper predatory shark. I have to brush up on knowledge to know if they can even swim quickly in bursts if need be, but I wouldn't be surprised if they cannot. No such thing as a free lunch in the animal kingdom, there always seems to be tradeoffs, especially in hospitable environments like in the cold waters those sharks inhabit Edit: & Hemipristis is more winner than loser, still surviving in the Anthropocene somehow & after so many environmental changes. Sand tiger sharks died out in lots of places arpund the world are they a loser? Lots of factors as to why local extinctions occur but they survive elsewhere, that we probably cannot fully understand. Lots of mammals and birds died out in the K-Pg but apparently because they radiated in diversity soon after, they were nothing but a success over the ages lol.. Hard not to get behind calling something good luck/ fortune sometimes, at least when there's lack of knowledge as to when 2 similar things have different fates over time edit 2: to even last 1 Million years as a species is a success. In the grand scheme of things, it's a drop in the bucket. But loads of generations are required to last that long, yes even as a greenland shark. & competing in the wild natural world/ adapt or die off. Reccommend anybody to look up the website that shows 1 millions dots (pretty sure the paleocast guy reccomended it/ that's where I found it iirc) but that thing goes on and on and on. One thousand by one thousand sounds a lot more than "merely 1 million", but it's still a lot

@elasmocast 22 күн бұрын

Thank you for your thoughts and insight! When it comes to “winners and losers”, it really comes down to a “glass half empty/glass half full” type of debate. If something survived for millions of years, we may call it a winner, or we may call it a loser for eventually becoming extinct. It’s a discussion that’s based on perception, rather than necessarily being “right or wrong”.

@Dman9fp 22 күн бұрын

@@elasmocast Yeah Exactly. It's still fun to judge & compare, keep doing your thing. "Lord knows" if I wasn't having some moments with exploring rivers while in my 30s I'd probably be making more elasmobranch evolution podcasts, might do so soon anyways, but as of present no definite expectations/ just on hiatus for that solo podcast. For sure Lots to discuss about fossil sharks & their evolution, way more than most people realize hah