Episode 135: Smallest of the Large
Publisher |
Katherine Shaw
Media Type |
audio
Categories Via RSS |
Natural Sciences
Science
Publication Date |
Sep 02, 2019
Episode Duration |
00:15:12
This week we're looking at some very small animals--but not animals that we think of as small. Join us for a horrendously cute episode! Further reading: The Echinoblog Further listening: Animals to the Max episode #75: The Sea Panda (vaquita) Varmints! episode #49: Hippos Further watching: An adorable baby pygmy hippo The Barbados threadsnake will protecc your fingertip: Parvulastra will decorate your thumbnail: Berthe's mouse lemur will defend this twig: The bumblebee bat will eat any bugs that come near your finger: The vaquita, tiny critically endangered porpoise: The long-tailed planigale is going to steal this ring and wear it as a belt: He höwl: A pygmy hippo and its mother will sample this grass: This Virgin Islands dwarf gecko will spend this dime if it can just pick it up: Show transcript: Welcome to Strange Animals Podcast. I’m your host, Kate Shaw. I talk a lot about biggest animals on this podcast, so maybe it’s time to look at the very smallest animals. I don’t mean algae or bacteria or things like that, I mean the smallest species of animals that aren’t usually considered especially small. We’ll start with the smolest snek, the Barbados threadsnake. It only lives on a few islands in the Caribbean, notably Barbados. The very largest individual ever measured was only 4.09 inches long, or 10.4 cm, but most are under four inches long. But it’s an extremely thin snake, not much thicker than a spaghetti noodle. The Barbados threadsnake mostly eats termites and ant larvae. It spends most of its time in leaf litter or under rocks, hunting for food. The female only lays one single egg, but the baby is relatively large, about half the mother’s length when it hatches. That’s so cute. Why are small things so cute? Remember the starfish episode where we talked about the largest starfish? Well, what’s the smallest starfish? That would be Parvulastra parvivipara, which is smaller than a fingernail decoration sticker. It grows to about ten millimeters across and is orangey-yellow in color. It lives on the coast of Tasmania in rock pools between low and high tide, called intertidal rock pools. If you remember the Mangrove killifish from a few episodes ago, you’ll remember how killifish females are hermaphrodites that produce both eggs and sperm, and usually self-fertilize their eggs to produce tiny clones of themselves. Well, Parvulastra does that too, although like the killifish it probably doesn’t always self-fertilize its eggs. But then it does something interesting for a starfish. Instead of releasing its eggs into the water to develop by themselves, Parvulastra keeps the eggs inside its body. And instead of the eggs hatching into larvae, they hatch into impossibly tiny miniature baby starfish, which the parent keeps inside its body until the baby is big enough to survive safely on its own. But what do the baby starfish eat while they’re still inside the mother? Well, they eat their SIBLINGS. The larger babies eat the smaller ones, and eventually leave through one of the openings in the parent’s body wall, called gonopores. Researchers theorize that one of the reasons the babies leave the parent is to escape being eaten by its siblings. And yes, occasionally a baby grows so big that it won’t fit through the gonopores. So it just goes on living inside the parent. Next, let’s look at the smallest primate. The primate order includes humans, apes, monkeys, and a lot of other animals, including lemurs. And the very smallest one is Berthe’s mouse lemur. Its body is only 3.6 inches long on average, or 9.2 cm, with a tail that more than doubles its length. Its fur is yellowish and brownish-red. Berthe’s mouse lemur was only discovered in 1992. It lives in one tiny area of western Madagascar, where it lives in trees, which means it’s vulnerable to the deforestation going on all over Madagascar and is considered endan...
This week we're looking at some very small animals--but not animals that we think of as small. Join us for a horrendously cute episode! Further reading: starfish-hermaphrodites-with-live.html">The Echinoblog Further listening: Animals to the Max episode #75: The Sea Panda (vaquita) Varmints! episode #49: Hippos Further watching: An adorable baby pygmy hippo The Barbados threadsnake will protecc your fingertip: Parvulastra will decorate your thumbnail: Berthe's mouse lemur will defend this twig: The bumblebee bat will eat any bugs that come near your finger: The vaquita, tiny critically endangered porpoise: The long-tailed planigale is going to steal this ring and wear it as a belt: He höwl: A pygmy hippo and its mother will sample this grass: This Virgin Islands dwarf gecko will spend this dime if it can just pick it up: Show transcript: Welcome to Strange Animals Podcast. I’m your host, Kate Shaw. I talk a lot about biggest animals on this podcast, so maybe it’s time to look at the very smallest animals. I don’t mean algae or bacteria or things like that, I mean the smallest species of animals that aren’t usually considered especially small. We’ll start with the smolest snek, the Barbados threadsnake. It only lives on a few islands in the Caribbean, notably Barbados. The very largest individual ever measured was only 4.09 inches long, or 10.4 cm, but most are under four inches long. But it’s an extremely thin snake, not much thicker than a spaghetti noodle. The Barbados threadsnake mostly eats termites and ant larvae. It spends most of its time in leaf litter or under rocks, hunting for food. The female only lays one single egg, but the baby is relatively large, about half the mother’s length when it hatches. That’s so cute. Why are small things so cute? Remember the starfish episode where we talked about the largest starfish? Well, what’s the smallest starfish? That would be Parvulastra parvivipara, which is smaller than a fingernail decoration sticker. It grows to about ten millimeters across and is orangey-yellow in color. It lives on the coast of Tasmania in rock pools between low and high tide, called intertidal rock pools. If you remember the Mangrove killifish from a few episodes ago, you’ll remember how killifish females are hermaphrodites that produce both eggs and sperm, and usually self-fertilize their eggs to produce tiny clones of themselves. Well, Parvulastra does that too, although like the killifish it probably doesn’t always self-fertilize its eggs. But then it does something interesting for a starfish. Instead of releasing its eggs into the water to develop by themselves, Parvulastra keeps the eggs inside its body. And instead of the eggs hatching into larvae, they hatch into impossibly tiny miniature baby starfish, which the parent keeps inside its body until the baby is big enough to survive safely on its own. But what do the baby starfish eat while they’re still inside the mother? Well, they eat their SIBLINGS. The larger babies eat the smaller ones, and eventually leave through one of the openings in the parent’s body wall, called gonopores. Researchers theorize that one of the reasons the babies leave the parent is to escape being eaten by its sibl...

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