Showing posts with label Struthiosaurus. Show all posts
Showing posts with label Struthiosaurus. Show all posts

Wednesday, June 19, 2013

The Zanzibar Leopard: A Lesson in Island Dwarfism....and Extinction

Very few people have heard of the Zanzibar leopard, unless of course you are a person from Zanzibar, an island ecologist interested in insular leopard populations, or you are another Zanzibar leopard.  (Which might be problematic, being another Zanzibar leopard, but we'll get to that later.)  In the meantime, let's look at what makes the Zanzibar leopard so special: its size.

When a population of animals becomes trapped on an island, they have to adapt or die: it's just that simple.  While many populations simply succumb to death, other populations of animals can sometimes shrink over the course of many generations, eventually becoming dwarfs of their former selves.  It's called island dwarfism, and it's happened many, many times throughout the history of life: the dwarf dinosaurs of Hațeg; the Channel Islands pygmy mammoth and the Channel Islands fox; the Cozumel Island fox and the Cozumel Island raccoon; and many, many others.  The subject of today's post is (you guessed it!) the Zanzibar leopard and, as you also might have already guessed, this particular leopard is an island dwarf!  

The leopard (Panthera pardus) is simply a fascinating animal.  Able to drag prey weighing more than three times its own weight in some cases, this mid-sized feline is the midnight stalker of the African savannah.  An occasional man-eater, there are numerous sub-species of the leopard, although no one can quite agree just how many there actually are.  While some people claim that there are just a few sub-species, others have claimed that there are around thirty!  However, most scientists agree that, at least for now, there are only eight or nine sub-species.  For regular readers of the blog, you've actually met a few of these sub-species already!  Probably the most famous, the African leopard (P. pardus pardus), was featured in a post about a year ago, entitled "Predators of Baby Leopards: You Might Be Surprised," in which we talked about....well, just read the post for yourself!  More recently, we met the Amur leopard (P. p. orientalis) in a post entitled "An Amur Leopard Upchucks."  I'm pretty sure you can figure out what that post is about all on your own.

There is some debate about whether the Zanzibar leopard is simply a separate population of the African leopard (P. p. pardus), or whether it is a distinct population defined by genetics.  When it is defined as a separate sub-species, the Zanzibar leopard has the scientific name of Panthera pardus adersi.  We'll talk more about this genetic confusion later: but that's enough about the genetics,  let's get to the interesting stuff!

Scientists think that the Zanzibar leopard has been isolated from the rest of the African leopard population on the mainland since the end of the last Ice Age, at which point global sea levels would have risen, cutting off the two main islands of the Zanzibar Archipelago, Unguja and Pemba, from the mainland.  Unguja, which is informally known as Zanzibar, is where the Zanzibar leopard can be found: at least, it used to be found there.

Remember when we were talking about how scientists can't really agree on whether the Zanzibar leopard is a distinct sub-species or not?  Well, their research is not aided by the fact that the Zanzibar leopard seems to be extinct.  Following the Zanzibar revolution in 1964, the government began a program to eradicate the Zanzibar leopard, both to stop apparent live-stock killings attributed to the cat, as well as to eliminate the leopard as an apparent source of witchcraft.  Research conducted in 1996 indicated that the leopard still survived on the island, but more recent research in 2002 has found no sign of the leopard.

Adapt or die: that's the mantra of the island animal.  When you throw humans into the mix, unfortunately its the second option that seems to occur most often.  Thousands of island animals have been exterminated by humans as their habitat is destroyed in the name of progress.  With nowhere else to go, they die out, leaving behind a legacy of destruction.

This was the birthday post of Ted Neher! Happy birthday, Grandpa! If you have a birthday coming up, just email me the date at cuyvaldar123946@gmail.com with the date and your favorite animals, and I will do my best to get a post in! And if you like what you are reading, please feel free to follow us here or via Facebook!

Tuesday, April 9, 2013

Island Hop (to the tune of "Thrift Shop")

Here we have the fourth song in the series, "Island Hop," to the tune of the very popular "Thrift Shop" by Macklemore.  Below is a link to the parody:



Here are the lyrics to the song:


Hey, Macklemore!  Can we go island hopping?

In-su-lar-ized...[x7]

Island, bio, geogra, phy... [x9]

[Hook:]
Australia and Tobag-
-o, Cross them both off my docket
Take a look at some of these animals close-up
Kakapo, Penguins and the Possum

[Verse 1:]
Nah, walk up to the map like, "What up with all these chunks of rock
Out in the deep blue sea, barely staying on top."
Ice in Antarctica, it's so dang frosty
That penguins like, "It's cold enough here to completely freeze a donkey."
Floatin' in, water's deep, I can see a dorsal fin,
Dressed for adventure, 'cept for one fact, I'm completely clean
Hoppin' off, walkin' round, I can really barely see
Probably should remember, there are some big animals here that need to eat-
(Hissssss)
But shoot, it's a Komodo Dragon! (Dang it)
Runnin' round, leap and bound, my death I hope to circumvent
Don't want to be a has been, someone needs to find my next of kin
But now I got a game plan
Run up to that tree and climb and
Wait up there 'til someone comes along and helps me down, really, it's a cinch
Next I'm off to Baffin Isle., turn the clock back awhile,
No for real - ask your grandpa - once the great auk here was found? (That's right)
Polar bears, arctic terns, and some things with flippers
And even more fossils if you just get diggin'
To avoid getting bored, let's head to the opposite seaboard
To the Channel Islands, much of which are rarely explored
Hello, say hello, to the Island Tree mallow,
The Channel Island fox and the introduced Catalina Island buffalo
Unfortunately, its now extinct, but at one point, there arose,
A 6-foot tall mammoth that would barely reach up to your nose

[Hook]
Australia and Tobag-
-o, Cross them both off my docket
Take a look at some of these animals close-up
Kakapo, Penguins and the Possum

[Hook]
Australia and Tobag-
-o, Cross them both off my docket
Take a look at some of these animals close-up
Kakapo, Penguins and the Possum

[Verse 2:]
What you know about island dwarfism?
What you know about the Cozumel Island fox, then?
I'm digging, I'm digging, I just can't find that page
An adult Cozumel's as big as a red one's pup
Thank your granddad for helping to slow the extinction and to-avert
'Cause right now we might still have the living thing
I'm in New Zealand, you can find me in (Wellington)
I'm not, I'm not sick of searchin' in that region (Wellington)
For the kea, the kiwi, the korora, the weka,
There ain't no native mammals in New Zealand, cept for bats, and of course whales and dolphins
Other marine ones like the seals and the sea lions
I hit the button and then through time we go flyin'
They be like, "Here we are at Hațeg - yo, let's check out the sites."
I'm like, "Whoa - that's Balaur and Hatzegopteryx."
Despite the transition, it's time to finish our mission
Magyarosaurus and Struthiosaurus - neither of which
Are very tall at all, they have both been shrimped
I call that island dwarfism at its most intenseness
That's not all that's here, though
Telmatosaurus, Bradycneme, and of course the Rhabdodon, or Rhabdodon't
But separating us from the mainland, no continental slope
In the future this place, separated from Romania it won't
Man it surely won't

(Hațeg...island dwarf...yeah!)

[Hook]
Australia and Tobag-
-o, Cross them both off my docket
Take a look at some of these animals close-up
Kakapo, Penguins and the Possum

[Bridge: x2]
Take the mainland and an island and juxtapose
It's quite incredible
They're surrounded by a moat
Which helps animals change their genetic code

[Hook]
Australia and Tobag-
-o, Cross them both off my docket
Take a look at some of these animals close-up
Kakapo, Penguins and the Possum

Is that your grandma's Balearic Islands cave goat?





Are you diggin' the songs?  Well, then check out our playlist below!

Tuesday, December 11, 2012

Top Ten Favorite Dinosaurs by Zack Neher (Part 4)

Part four of my Top Ten Favorite Dinosaurs list.  Enjoy!

2. Struthiosaurus
Just like Masiakasaurus, Struthiosaurus also lived during the Late Cretaceous Period.  Also like Masiakasaurus, Struthiosaurus was small.  But Struthiosaurus was small in a very different way than Masiakasaurus.  Remember when we talked about island/insular dwarfism in the context of the Channel Island fox?  Well, island dwarfism is back, in all of its glory!  A brief refresher, island dwarfism is what sometimes happens to animals that have become trapped on islands.  Over many generations, they shrink in order to match the limited food supply.  If there is a limited supply of food, then the smallest of your species, not the largest, are much more likely to survive.  Another factor that often helps island dwarfs is that predation is typically not as intense on islands as compared to mainlands, but that is not always the case.  Anyways, around 75 MYA, global sea levels were much higher.  In North America, we had the Western Interior Seaway dividing the continent, while Europe was simply reduced to a number of individual islands, one of which is now known as Hațeg Island.  And, if you are any good at guessing how stories end, you can probably see where this is going.  Yes, Struthiosaurus was an island-dwarf!  He is also really cool because he is an ankylosaur, a group of dinosaurs that are incredibly interesting!  Another thing that I absolutely have to mention here pertains to the picture of Struthiosaurus that we have below.  This picture was drawn by an incredibly talented young artist named Sam Lippincott.  Only in eighth grade, he is well on his way to achieving artistic greatness!  Below are some more pictures of his, all of them absolutely fantastic!  He made these pictures for my last lecture and I have the Struthiosaurus and Magyarosaurus pictures framed on my wall, I love them so much!  Let's all give Sam a round of applause! 
Struthiosaurus, an ankylosaur, by Sam Lippincott
Telmatosaurus, a hadrosaur, by Sam Lippincott
Magyarosaurus, a sauropod, by Sam Lippincott
Hatzegopteryx, a pterosaur, by Sam Lippincott
Europasaurus, another dwarf sauropod dinosaur, but from an island other than Hațeg Island

TO BE CONCLUDED IN PART 5

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