Showing posts with label sea urchins. Show all posts
Showing posts with label sea urchins. Show all posts

Saturday, October 13, 2018

It Is My Dooty To Report

Reader and Friend Of Pootie Nisa Blackmon recently corrected me about a misapprehension I had concerning how sea urchins take a dump. If this is not the only blog you'll read today that starts out like that, I hope it's the first.

As she explained, they don't really take a dump, at least not in the gravity-assisted way we have grown accustomed to. Their anus is on the top of their body. That seems like really poor design but we have to remember they're underwater for the event, and presumably their effluent leaves the immediate area. Up until now I had not considered that the ocean is basically a giant toilet. This cements my determination to avoid it, especially as it is not airworthy, and I do not have gills.

Well. Under the circumstances it only makes sense to put the anus on top. Those circumstances being that the urchin's mouth is on the bottom end, where it can hoover algae and such from various surfaces, and in general animals are designed to poop as far away from their mouths as possible. Flip yourself upside down to mow algae on the sea floor with your lips and you will note that your anus is on top, too.

Urchins have five-fold symmetry, which is unusual in the animal kingdom. You'd think that if they were doubling up, however many times, they'd come out even. But they start out bilateral like us, and then the left side only gets busy and divides, and the right side stays put to be the oddball. We end up with a basically spherical animal, like Chris Christie.

It's hard to argue with success. That anus arrangement has been going on for a long time. And individual urchins apparently keep growing, however slowly, until something eats them, such as a Japanese person. They can get to be a hundred years old, or even 200, with few signs of aging, which is understandable in a critter that starts out with sprouty hairs and dribbles poop on itself. What more could it do, keep the turn signal on? Scientists have learned a lot about their longevity by measuring the Carbon-14 in their little round suits, thoughtfully deposited during the nuclear bomb testing of the 1950s. They really don't know how old an urchin can get, although science is intrigued by the discovery of a massive urchin with what is thought to be catapult dents.

I just had a little fun at the sea urchins' expense, so let me correct the record to note that even old urchins do not dribble poop on themselves, but eject it forcefully. (Related sea stars have anal cones for the same purpose so as to distance themselves from their personal magma.) They probably do have to get up to go several times a night, though.



Aristotle, who had the benefit of being a curious fellow in a time when nobody knew anything, studied almost everything, including urchins, and he referred to the purpose of the anus as providing "issue of the residuum." I plan to work this into my vocabulary as soon as possible.

So there's a mouth and an anus and lots of tubes inside for organizing stuff once it's in there, but what about sex? It's a little disappointing. Female urchins expel eggs that float freely in the water, and male urchins produce milt that can fertilize any eggs it encounters. This method is scientifically known as "jacking off," or, if it keeps up for a long time, "on and onanism."

It doesn't seem like much of a plan, but urchins have been around for 450 million years. That's a pretty good run for something that has an asshole at the top. Take heart, America.

Wednesday, January 31, 2018

Fido and Fideux

Do you want someone who thinks you're perfect just the way you are, and will love you without condition or reserve, in sickness and in health, in petulance and in affability? Of course you do. And if you have an extra $50,000 lying around the house near a nice dog, you can have it forever and ever. That's what it costs to get your dog copied and shipped so you can take that guesswork out of finding your new best friend. Yes, you too can thumb your nose at death and loneliness and get a whole new fifteen years of picking up poop through the simplicity of cloning.

Everyone remembers that first clone, Dolly the sheep. Sheep were considered ideal subjects for cloning because no one could tell them apart anyway. But Dolly was merely the first animal cloned from a body cell. The first animal cloned at all was a sea urchin. Hans Dreisch did it in 1885, presumably after having developed quite a fondness for a particular urchin. He shook an urchin embryo until its cells came unglued and discovered that the loose cells became identical urchins. He was delighted. The other biologists talked about him behind his back.

In 1902, Han Spemann continued the work with the altogether more laudable Salamander. He was able to separate its embryonic cells by teasing them apart with a loop of baby hair. He made identical salamanders up to a certain point of embryonic development, after which his cells just produced half-embryos, resulting in salamanders that paddled around in circles all their lives. There is today no market for cloned pet salamanders, because all salamander lovers know each one is just as wonderful as the next.

The first pet cloned was a cat, through the auspices of an outfit called Genetic Savings and Clone. Cats come cheaper. I could have gotten a whole new (Saint) Larry for a paltry 25 grand. I'm not inclined to, though. I know I can do just fine by selecting a short-haired tortoiseshell kitten the next time I'm bereft, even it if arrived the old-fashioned way, through cat lust. Tortoiseshell kitties are the very very best. I know this from the 100% satisfaction rating I got using my scientifically unimpeachable sample size of One. I most certainly was looking for a tortoiseshell the last time I went to the Humane Society, after Larry had been gone a year, but there weren't any that day, and my need for an immediate cat overcame my inclination to wait for a speckly one, and that's how Tater ensued. Tater wasn't the first one I played with but she was the only one with any personality, and my streak of picking funny and affectionate cats is unbroken: Tater is one fine bundle of furry pudding. Unfortunately her adoration is almost completely directed toward Dave. She'll give me the time of day but it's Dave that lights her up. I have to go down the street now to be greeted properly by a cat, a small torty named Millie who is willing to take a good rumpling and whose owner is no longer alarmed by me.

There's only one explanation for the price discrepancy between getting a dog cloned and a cat cloned, and it's not the one the company provides. The company says the entire operation is expensive because they have the very best equipment and the very finest staff with the very stoutest salaries, but it's got to be the same equipment they're using for the $15,000 cloned cow. Presumably the cat is less expensive because surrogate mommy cats go into heat more often than dogs do. So they're charging twice as much just to make you wait around until the bitch gets frisky? I don't think so. I think it's a matter of demand. I think they know dog people are just that much more nuts. A cat person that nuts just accumulates a bunch more cats.

Low-tech clone
There's no guarantee though. What if you buy your cloned dog and it's everything your old dog was, except enamored of you? What if it likes your spouse better? As long as it doesn't  have horns and an extra tail, you're not getting a refund.

Plus, you're not the same person you were fifteen years ago when you got your best dog. You've completely forgotten what a pain in the ass your best dog was as a puppy, and you're fifteen years crankier about dealing with it.

Many people suggest that this whole project is a waste of fifty grand when you could buy a bazillion mosquito nets for Africans with the same money, but that's a strained argument. You wouldn't have done that anyway.