idw – Informationsdienst Wissenschaft

Nachrichten, Termine, Experten

Grafik: idw-Logo
Science Video Project
idw-Abo

idw-News App:

AppStore

Google Play Store



Instance:
Share on: 
02/17/2022 09:39

BioRescue creates two new embryos in race against time to prevent the extinction of the northern white rhinoceros

Dipl. Soz. Steven Seet Wissenschaftskommunikation
Leibniz-Institut für Zoo- und Wildtierforschung (IZW) im Forschungsverbund Berlin e.V.

    In two sets of procedures between October 2021 and February 2022 the BioRescue consortium created two new northern white embryos, bringing the total to 14. Oocytes (egg cells) were collected from northern white rhino Fatu in October and January at Ol Pejeta Conservancy, Kenya, and were matured and inseminated at Avantea laboratory, Italy. The developed embryos were cryopreserved in November 2021 and February 2022, and await transfer to southern white rhino female surrogates in the foreseeable future.

    The procedures in October 2021 and January 2022 at Ol Pejeta mark the seventh and eighth successful oocyte collection conducted by the team of scientists and conservationists of Leibniz Institute for Zoo and Wildlife Research (Leibniz-IZW), Safari Park Dvůr Králové, Kenya Wildlife Service, Wildlife Research and Training Institute, Avantea, University of Padua and Ol Pejeta Conservancy. In the eight procedures since 2019, the team retrieved a total of 119 oocytes from Fatu and her mother Nájin – resulting in 14 embryos. Since these embryos exclusively originate from Fatu’s oocytes, BioRescue decided to cease egg harvesting on Najin following an ethical risk assessment in 2021. Following the recent oocyte collections, the eggs were airlifted to Avantea laboratory in Cremona, Italy, for maturation, fertilisation, embryo development and cryopreservation. Both recent embryos were produced using semen from northern white rhino bull Angalifu. In total, there are now 11 embryos from Fatu and northern white rhino bull Suni and 3 embryos from Fatu and Angalifu stored in liquid nitrogen for future embryo transfers.
    A greater number of embryos increases the chances of eventually producing a northern white rhino calf. The consortium aims to repeat oocyte collection from Fatu and embryo development on a regular basis, as long as it is feasible and responsible considering Fatu’s welfare and the chances of success. This will be determined by regular ethical risk assessments that are conducted before every BioRescue procedure under the guidance of the Ethics Laboratory for Veterinary Medicine, Conservation and Animal Welfare at Padua University.


    Contact for scientific information:

    Prof Thomas Hildebrandt
    Leibniz Institute for Zoo and Wildlife Research (Leibniz-IZW)
    BioRescue project head and head of Department of Reproduction Management
    Phone: +49305168440
    Email: hildebrandt@izw-berlin.de


    Images

    Northern white rhino oocyte collection in January 2022 in Kenya
    Northern white rhino oocyte collection in January 2022 in Kenya
    Jan Zwilling
    BioRescue/Jan Zwilling

    Oocyte retrieval by BioRescue scientists in Kenya
    Oocyte retrieval by BioRescue scientists in Kenya
    Jan Zwilling
    BioRescue/Jan Zwilling


    Criteria of this press release:
    Journalists
    Biology, Environment / ecology
    transregional, national
    Research results
    English


     

    Northern white rhino oocyte collection in January 2022 in Kenya


    For download

    x

    Oocyte retrieval by BioRescue scientists in Kenya


    For download

    x

    Help

    Search / advanced search of the idw archives
    Combination of search terms

    You can combine search terms with and, or and/or not, e.g. Philo not logy.

    Brackets

    You can use brackets to separate combinations from each other, e.g. (Philo not logy) or (Psycho and logy).

    Phrases

    Coherent groups of words will be located as complete phrases if you put them into quotation marks, e.g. “Federal Republic of Germany”.

    Selection criteria

    You can also use the advanced search without entering search terms. It will then follow the criteria you have selected (e.g. country or subject area).

    If you have not selected any criteria in a given category, the entire category will be searched (e.g. all subject areas or all countries).