[HN Gopher] The first report of asexual reproduction in Californ...
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The first report of asexual reproduction in California condors
Author : bryan0
Score : 65 points
Date : 2021-10-30 17:15 UTC (5 hours ago)
(HTM) web link (apnews.com)
(TXT) w3m dump (apnews.com)
| [deleted]
| sp332 wrote:
| I was wondering how a female generated male genetic data. Bird
| sex chromosomes are fuzzier than I expected.
| https://genetics.thetech.org/original_news/news115
| gus_massa wrote:
| It now very fuzzy. https://en.wikipedia.org/wiki/ZW_sex-
| determination_system Simplifying, they have the ZW system where
| the ZZ are males and the ZW are females. (As in the mammalian
| cases, there are some exceptions and cases where the number of
| genes is different from 2.) The article you posted discuss too
| much about how the ZZ or ZW determines the sex, and IIUC it's
| still not clear if the W induce the femaleness or the double Z
| induces maleness or what is happening, but the main idea that
| distinguish the ZW system and the XY system is simple.
| launchiterate wrote:
| Ian Malcom was right!
| enzino wrote:
| overton window for males' extermination? nothing that comes out
| of california can be trusted these days
| WhisperingShiba wrote:
| Based.
| duskwuff wrote:
| Believe it or not, this actually isn't all that uncommon in
| birds. Certain types of turkeys and chickens will exhibit
| parthenogenesis ("virgin birth") somewhat frequently.
|
| https://rep.bioscientifica.com/view/journals/rep/155/6/REP-1...
| culi wrote:
| It's called parthenogenesis.[0] While it might not be super
| uncommon in certain types of turkeys, it's extremely rare
| overall for birds. It is a lot more common in fish, amphibians,
| and reptiles however. Given that it's been well-observed in
| reptiles, it makes me wonder how much it might actually be
| happening in birds and we've just been failing to observe it.
|
| [0] https://en.wikipedia.org/wiki/Parthenogenesis
|
| Also here's the actual study:
| https://academic.oup.com/jhered/advance-article/doi/10.1093/...
| 7952 wrote:
| Life finds a way!
| elromulous wrote:
| Came here to say this lol
| rrrrrrrrrrrryan wrote:
| *Life, uh, finds a way.
| bryanrasmussen wrote:
| Indeed, even if it seems that life doesn't actually 100% need
| to.
|
| Not so much finding a way as more not waiting around.
| geuis wrote:
| Can we update the link to point to the actual release from San
| Diego Zoo?
| https://sandiegozoowildlifealliance.org/pr/CondorParthenogen...
| encryptluks2 wrote:
| This is how baby Jesus was born.
| retrac wrote:
| Condors are not raptors.
| SAI_Peregrinus wrote:
| Yes, they are. All the New-World Vultures (Cathartidae) are
| in the order Accipitriformes[1].
|
| [1] Chesser, R. T., R. C. Banks, F. K. Barker, C. Cicero, J.
| L. Dunn, A. W. Kratter, I. J. Lovette, P. C. Rasmussen, J. V.
| Remsen Jr., J. D. Rising, D. F. Stotz, and K. Winker (2010).
| Fifty-first supplement to the American Ornithologists' Union
| Check-list of North American Birds. Auk 127: 726-744.
| GhettoComputers wrote:
| >In this case, each mother condor had previously bred with males,
| producing 34 chicks, and each was housed with a fertile male at
| the time they produced the eggs through parthenogenesis.
|
| >The researchers said they believe it is the first case of
| asexual reproduction in any avian species where the female had
| access to a mate.
|
| Do they store some sort of marker? Both were male, reminiscent of
| the insect family of hymenoptera which produces male drones with
| no fertilization?
| gus_massa wrote:
| > _The asexual reproduction was discovered some years ago
| during widespread testing of genetic material collected over
| decades from condors, both living and dead, in breeding
| programs and in the wild._
|
| They just made a standard DNA paternity test, and got a
| surprise.
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(page generated 2021-10-30 23:01 UTC)