Skip to content
AFN
Menu
  • Local
  • World
  • Economics
  • Entertainment
  • Sports
  • Health
Menu

Two California condors first reproduced asexually, scientists say

Posted on 01/11/202101/11/2021 by editorial
A researcher from the San Diego Zoo Wildlife Alliance has laboratory samples from California condors.

(CNN) – Two captive female California condors each produced a chick asexually years ago, the only such cases ever recorded for that endangered species, researchers reported Thursday.

And while this has been seen in other vertebrates and even birds, these are believed to be the first cases recorded in birds whose females had access to a male, as in the case of these condors, the researchers said.

The rare hatches – the first of which occurred in the early 2000s and the second later that decade – were seen only when researchers analyzed biological samples from condors in a breeding program run by the Zoo’s Wildlife Alliance. from San Diego, the group said.

The discovery, published Thursday in the Journal of Heredity, raises questions about how many more species reproduce asexually undetected, one of the researchers said.

The female condors in question were continuously housed with a fertile male in the alliance’s breeding program, and each female had many other chicks with their mates. But recent genetic testing found two abnormalities.

The two anomalous chicks were genetically related to the female that laid her eggs, but neither was genetically related to a male, meaning that they were both biologically fatherless, said the alliance.

“It was just a surprise. We only confirmed it because of the normal genetic studies that we do to prove paternity,” Oliver Ryder, director of conservation genetics for the alliance, said in a press release.

“Our results showed that both eggs possessed the expected ZZ male sex chromosomes, but all markers were only inherited from their mothers (mothers), which verifies our findings.”

A chick died in 2003 shortly before its second birthday; the other died in 2017 days before his 8th birthday, researchers said.

More than condors: the asexual reproduction of some vertebrates

For vertebrates, asexual reproduction or parthenogenesis is rare, but hardly new. It is seen in some species of fishes and reptiles, and scientists believe it may be a response to the isolation of any male partner.

In birds, asexual reproduction has been recorded on rare occasions, and mainly in domestic turkeys and chickens separated from males, the researchers said in the report. Journal of Heredity.

Scientists also saw the beginnings of asexual reproduction in finches in a 2008 study, and in house pigeons in a 1924 study, but the eggs did not hatch, the journal report says.

The researchers believe the condor findings stand out compared to other cases in birds.

“Unlike other examples of avian parthenogenesis, these two occurrences are not explained by the absence of a suitable male,” said Cynthia Steiner, associate director of the alliance’s conservation research division.

California condors have long been considered endangered. About 200 adults are known to live in the wild, He says the International Union for Conservation of Nature.

The San Diego Zoo Wildlife Alliance, a nonprofit conservation organization at the San Diego Zoo and San Diego Zoo Safari Park, says it hopes to identify other cases of asexual reproduction.

“These findings now raise questions about whether this could occur undetected in other species,” Ryder said.

1 thought on “Two California condors first reproduced asexually, scientists say”

  1. editorial says:
    01/11/2021 at 14:13

    Download Above & Beyond – Group Therapy 371 Album Mp3 Zip
    Download Luchii & Anwar – House Party Album Mp3 Zip
    Download Pablo Feliu – Zoológico – EP Album Mp3 Zip
    Download Chop Wood – The Golden Lining Album Mp3 Zip
    Download Dotta Coppa – We Love Dancehall Album Mp3 Zip
    Download LaboRoss – My Home Album Mp3 Zip
    Download Skillz 8Figure – Gangsta Luv – EP Album Mp3 Zip
    Download Brain Power Amadeus – Mozart Effect Album Mp3 Zip
    Download Cleverson Silva – All My Days Documentary Album Mp3 Zip
    Download Dreamflute Dorothée Fröller – Angel Music – Sacred Harmonies Album Mp3 Zip
    Download Base Cclx – Base Cclx (Ao Vivo) Album Mp3 Zip
    Download Max Mekhanikov – Full Moon – EP Album Mp3 Zip
    Download Jacob’s Piano – Light Album Mp3 Zip
    Download Filadelfia Lovsang – Immanuel – Live Album Mp3 Zip
    Download Indigo Ranch – ZUBY NEHTY VĚTVE STROMY Album Mp3 Zip
    Download Hannah Williams – Keep Me Alive Album Mp3 Zip
    Download Brian Byrne & ‎The RTE Concert Orchestra – The Price of Desire Ost (Original Motion Picture Soundtrack) Album Mp3 Zip
    Download [NIK] – Durch[_]einander Album Mp3 Zip
    Download Herdoil – Inboluzioa Album Mp3 Zip
    Download B JYUN. – BREAK THE LINE. Album Mp3 Zip
    Download Deadfuck – #Humanité Album Mp3 Zip
    Download The Swamp Stomp String Band – Old Dog, Old Tricks Album Mp3 Zip
    Download Mr. Pimp-Lotion – Lotion’s 8 Album Mp3 Zip
    Download The Flattrakkers – Gettin’ Dirty Album Mp3 Zip
    Download PEDIOPHOBIA – Pas de Quatre – EP Album Mp3 Zip

Comments are closed.

https://telegra.ph/Download-Desi-Music-Bollywood—Bhangra-vs-Bollywood—EP-2019-Album-10-08
https://engenhariaexercicios.com.br/question/download-tru-la-la-esenciales-album-mp3-zip/
https://wakelet.com/wake/t0u2kg63eo8_Qt9zmLZfD
https://engenhariaexercicios.com.br/question/download-convergencia-music-um-album-mp3-zip/
https://engenhariaexercicios.com.br/question/download-kraken-s-beard-that-explains-the-smell-album-mp3-zip/
https://replit.com/@zipsunnytraninlarg
https://engenhariaexercicios.com.br/question/download-derek-jones-dans-ta-presence-album-mp3-zip/
https://engenhariaexercicios.com.br/question/download-vials-of-wrath-dark-winter-memories-album-mp3-zip/
https://replit.com/@album-varios-art-1-am-stud
https://engenhariaexercicios.com.br/question/download-ryan-molloy-fergal-scahill-one-day-november-woods-album-mp3-zip/
https://engenhariaexercicios.com.br/question/download-priroda-ada-album-mp3-zip/
https://engenhariaexercicios.com.br/question/download-ai-means-love-whatever-u-want-album-mp3-zip/
https://engenhariaexercicios.com.br/question/download-audra-kubat-the-sliver-the-salve-album-mp3-zip/
https://engenhariaexercicios.com.br/question/download-machinegum-conduit-album-mp3-zip/
https://engenhariaexercicios.com.br/question/download-above-beyond-group-therapy-358-album-mp3-zip/
https://engenhariaexercicios.com.br/question/download-dj-king-assassin-jt-the-bigga-figga-fillmoe-2-san-jo-album-mp3-zip/
https://engenhariaexercicios.com.br/question/download-various-artists-1-am-study-session-album-mp3-zip/
https://engenhariaexercicios.com.br/question/download-feed-your-wolves-save-yourself-album-mp3-zip/
https://engenhariaexercicios.com.br/question/download-verschillende-artiesten-medammecour-on-tour-live-parkstad-l-album-mp3-zip/
https://engenhariaexercicios.com.br/question/download-marc-atkinson-solo-album-mp3-zip/

©2023 AFN | Design: Newspaperly WordPress Theme