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May 13, 2007
Fossilizing on the beach?
When I take a day off from blogging, it's much harder to return to it. Taking a day off makes me want to take a week off, and taking a week off makes me want to take two weeks off. So it's better for me to never, ever, take a break from blogging. Because of the lurking, accumulated rest deficit, "resting up" is a dire threat to blogging. Rest equals atrophy, and atrophy leads to fossilization. The truth is that taking any sort of rest activates latent feelings of blogger burnout syndrome which want to break free and take over. The only way I have of preventing blog burnout from developing is to switch into robot writing mode. Doing this means forgetting completely about that impulse to write creatively or think imaginatively, and instead approach writing the way I would approach the unpleasant task of performing 120 pushups. Just do it, and fossilization is avoided. I might have been avoiding blogging yesterday, but on the beach Coco and I were unable to avoid stranded, often mussel-encrusted horseshoe crabs, which were washed up all over the place. Coco is looking perplexed, because the one in front of her moved. The horseshoe crab (Limulus polyphemus) isn't really a crab, but a much older arthropod, related more closely to the trilobite, and often described as a "living fossil." The horseshoe crab, Limulus polyphemus, is more closely related to chelicerates such as spiders, scorpions, ticks and mites than it is to true crabs and other crustaceans. Horseshoe crabs are considered to be "living fossils" that have evolved little in the past 250 million years. Limulus is an ancient genus which has probably existed since the Silurian period (440 to 410 million years ago), and shows little morphological change from the now extinct genus Paleolimulus that lived about 200 million years ago. Limulus polyphemus is believed to be the closest living relative of trilobites (Shuster 1982).Why they get stranded on beaches is not entirely clear. (I've seen them washed up regularly for years, although I'm sure that children today are taught that it's man's fault.) Right now it's spawning season, and it has been hypothesized that telson (tail) abnormalities may contribute to the problem: Massive beach strandings of adults accompany seasonal spawning migrations of crabs along Cape May in Delaware Bay, (USA). At least 190000 horseshoe crabs, approximating 10% of the adult population, died from beach stranding along the New Jersey shore of Delaware Bay during the 1986 (May to June) spawning season. Abnormalities of the telson (which is used in righting behavior) were significantly more common among stranded crabs than among individuals actively spawning on the intertidal beach.I took a picture of the one at left as it was being washed up, and while my suspicion was that the large number of mussels might have had something to do with its lack of coordination, I read that such freeloaders are completely normal. Anyway, it seemed unable to right itself, and uninterested in escaping. I put it back into the water, but that seemed like a waste of time. Some of these creatures are just doomed, like the dozens I saw dried up and dead. But Coco wasn't there to learn about living fossils; her purpose was to force me to play. Which I did. The frisbee is made of rubber, and Coco can't resist shaking it. This deceptive photo freezes in time something which normally takes place too fast for me to notice:
But can't it also be seen as clinging to voodoo in the hope of avoiding fossilization? (Fortunately, Coco dragged me away from what would have been a futile paradox.) posted by Eric on 05.13.07 at 12:47 PM
Comments
Ohhhhhhhh!!!! LOL. I guess I shouldn't have expected a joke about a virgin forest! :) Eric Scheie · May 13, 2007 05:37 PM Looks like your dog just ate the last trilobite on the planet. Bleepless · May 13, 2007 11:50 PM Post a comment
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Thank you for yet another interesting post, Eric. CV is on my daily read list, but I'm not a great commenter. However, coming down to you tree hugging reference, I just cannot help wanting to share with you a story I heard the other day:
""
Tree hugger
A woman from Los Angeles, who was a tree hugger and an anti-hunter, purchased a piece of timberland, near Grants Pass, OR.
There was a large tree on one of the highest points in the tract. She wanted a good view of the natural splendor of her land so she started to climb the big tree. As she neared the top she encountered a spotted owl that attacked her. In her haste to escape, the woman slid down the tree to the ground and got many splinters in her crotch.
In considerable pain, she hurried to the nearest
doctor She told him she was an environmentalist and an anti-hunter and how she came to get all the splinters. The doctor listened to her story with
great patience and then told her to go into the examining room and he would see if he could help
her.
She sat and waited three hours before the doctor
reappeared. The angry woman demanded, "What took you so long?"
He smiled and then told her, "Well, I had to get
permits from the Environmental Protection Agency, the Forest Service and the Bureau of Land
Management before I could remove old-growth timber from a recreational area. I'm sorry, but they turned me down."
""
Padon my being cheeky on a Sunday evening (Oslo time)! And please keep up the good work! Best regards, JD in Oslo.