Devil's Hole Pupfish article
Posted 19 December 2012 - 03:05 PM
Things may not be looking too good for the Devil's Hole Pupfish. The small numbers seem to be creating a genetic bottleneck leading to “a high load of deleterious mutations”. The article explores the proposal that the only way to save the species may be to introduce a few of the related Ash Meadows Pupfish into the remaining population.
Posted 19 December 2012 - 05:13 PM
Posted 20 December 2012 - 10:52 AM
Posted 20 December 2012 - 02:54 PM
In the case of the Mexican Goodeids there really isn't an alternative at this point, so we should just be grateful for what we did save. I don't look forward to saying the same thing about DH Pupfish, but I'd rather say that than goodbye forever.
But if the habitat shapes the species, as is unusually true of the Devil's Hole Pupfish, you wind up with a different animal in other environments, and then the question arises, what are you conserving? This makes it way harder to conserve species, of course, because it's usually the habitat that's damaged sometimes beyond hope of restoration. That's why it's so important to save the habitat of other narrow endemic species like the Alabama Spring Pygmy Sunfish, because if the spring system needed by the species disappears, well, you have some kind of Elassoma left that will survive in aquaria, but it won't be the same thing. Probably the same thing is happening with many of the Mexican Goodeids. Like they say in the old country, "Earth First! Then we'll move out and destroy some other planets."
Posted 21 December 2012 - 11:49 AM
Posted 21 December 2012 - 04:44 PM
It's not really a problem unless you choose to perceive it as such. Any one or many of multiple factors could enter into the equation. Knowing them ahead of time is generally not possible, unless you're one of the factors, and once they've occurred, it's probably too late to do anything about it. So i guess we'll just see.
Yes, gene expression is the name of the game and that's where most evolution takes places in the genome, along with processes like epigenetics. None of it's immutable and that's the problem.
Reply to this topic
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users