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Category Archives: Algemeen

*Pallid* Cacatua galerita Eleonora??

*Pallid* Cacatua galerita Eleonora??

In the R&D centre in Belgium, they have a female Cacatua galerita Eleonora (The Eleonora cockatoo, aka medium sulphur-crested cockatoo) with a different color of the beak, legs and nails. The color of the beak is grey, the legs and nails are light grey (in wildtype beak, legs and nails are completely black).

The bird is born with red eyes, which turned dark after a few days.  The fact that these ‘paler’ birds are all females let us SUSPECT (for the sake of a good order: we did not examine any feathers or DNA of this bird), that it is most possible a sex-linked recessive mutation and (possible) a pallid mutation.

Inheritance *dominant yellow* Agapornis fischeri

The last years we examined several breeding records of *dominant yellow* Agapornis fischeri. It soon became clear that this phenotype (mutation) has a dominant expression, but not all youngster are *yellow*. We also have *misty* and *edged* youngsters. Breeding outcomes helped us to exclude a sex-linked dominant inheritance.

Because we have several phenotypes in * dominant yellow* and there are no clear SF or DF phenotypes, we believe that this mutation has most probably a variable expressivity and, POSSIBLE, a reduced penetrance, but reduced penetrance is something that definitely needs further examination.

FAQ: Where are we with regards to the opaline mutation in Agapornis eye-ring species?

FAQ: Where are we with regards to the opaline mutation in Agapornis eye-ring species?

FAQ: A number of years ago the first opaline Agapornis fischeri appeared on the scene. This sex-linked mutation probably originated in China. In competitions the BVA Masters provides room for the opaline Agapornis fischeri, but not for opaline in the other eye-ring species. This is in spite of the fact that many breeders are working hard to introduce the opaline mutation into other eye-ring species (Agapornis personatus, Agapornis lilianae, Agapornis nigrigenis). Why is it that there is no room (yet) for these at competitions?

Answer: It’s very simple. Developing a good transmutation transmutation (genetic introgression) takes on average 5 F and 5 R generations, which comes to about 10 years. In the case of mutations on the Z chromosome, including opaline, it can take even longer.

*Pallid* Black-headed parrot (Black-headed Caique)?

*Pallid* Black-headed parrot (Black-headed Caique)?

Pionites melanocephalus (Linnaeus, 1758)

The Belgian breeder Mike Matthijs bred, since 2015, four ‘paler’ Black-headed parrot (Black-headed Caique).
The birds are born with red eyes which darken after a few days. The wings are partially bleached and turns light green. The flight feathers are grey. The feet are bleached, the nails light grey coloured and the black head turns grey. The beaks becomes almost horn coloured. The inheritance looks sex-linked recessive. That is why we think this is a possible pallid mutation.

Mike is looking for breeders who have the same mutation. You can contact him by e-mail: pallidcaique@outlook.com

Aanpassingen / revised taxonomy genus Forpus

Forpus xanthopterygius crassirostris  werd door  Howard & Moore in 1980, in A Complete Checklist of the Birds of the World gecatalogeerd als ondersoort van Forpus xanthopterygius (Howard and Moore, 1980).

In 2013 werden de resultaten van een genetisch onderzoek gepubliceerd die de positie van crassirostris als ondersoort van F. xanthopterygius in twijfel trekt.(Smith et al., 2013) Ik citeer letterlijk uit dat onderzoek: ‘The position of F. xanthopterygius crassirostris was poorly resolved, and its sister relationship to the other F. xanthopterygius subspecies was poorly supported.’

Wat zoveel betekent dan dat er weinig wetenschappelijk bewijs is voor de relatie tussen F. xanthopterygius crassirostris en de andere   F. xanthopterygius ondersoorten. De analyse van de gegevens van dat DNA onderzoek laten uitschijnen dat deze soort eerder een aparte tak is.

In schreef in mijn artikelenreeks en ik citeer “Het kan dus misschien maar een kwestie van tijd zijn eer Forpus crassirostris,(en dan mogelijk met de daarbij horende ondersoort Forpus xanthopterygius flavescens) door taxonomisten als aparte soort zal beschouwd worden (Bocalini, 2015).”

en nu is het zover. De belangrijkste taxonomisten beschouwen nu Forpus crassirostris als een aparte soort.

Ik heb mijn artikelen over het genus Forpus online in deze zin aangepast.


Forpus taxonomy revised

In 2013 Smith et al already announced (I quote) ‘The position of F. xanthopterygius crassirostris was poorly resolved, and its sister relationship to the other F. xanthopterygius subspecies was poorly supported.’

Now taxonomists revised Genus Forpus taxonomy and they consider Forpus xanthopterygius crassirostris as a separete species: Forpus crassirostris (Taczanowski) 1883

Forpus (m.) Boie,F 1858

  • Forpus cyanopygius (Souance) 1856
    • Forpus cyanopygius cyanopygius (Souance) 1856
    • Forpus cyanopygius insularis (Ridgway) 1888
  • Forpus passerinus (Linnaeus) 1758
    • Forpus passerinus cyanochlorus (Schlegel) 1864
    • Forpus passerinus cyanophanes (Todd) 1915
    • Forpus passerinus deliciosus (Ridgway) 1888
    • Forpus passerinus passerinus (Linnaeus) 1758
    • Forpus passerinus viridissimus (Lafresnaye) 1848
  • Forpus spengeli (Hartlaub) 1885
  • Forpus xanthopterygius (Spix) 1824
    • Forpus xanthopterygius flavescens (Salvadori) 1891
    • Forpus xanthopterygius flavissimus Hellmayr 1929
    • Forpus xanthopterygius xanthopterygius (Spix) 1824
  • Forpus conspicillatus (Lafresnaye) 1848
    • Forpus conspicillatus caucae (Chapman) 1915
    • Forpus conspicillatus conspicillatus (Lafresnaye) 1848
    • Forpus conspicillatus metae Borrero & Hernandez 1961
  • Forpus modestus (Cabanis) 1848
    • Forpus modestus modestus (Cabanis) 1848
    • Forpus modestus sclateri (Gray,GR) 1859
  • Forpus coelestis (Lesson) 1847
  • Forpus xanthops (Salvin) 1895
  • Forpus crassirostris (Taczanowski) 1883

 

 

Taxonomy in a nutshell

Taxonomy in a nutshell

By Dirk Van den Abeele
Ornitho-Genetics VZW
MUTAVI, Research & Advice Group

Published BVA-International magazin August 2017

I can imagine that most aviculturists are occasionally lost and wonder what taxonomy is, and more to the point what the connection with our hobby actually is? An understandable reaction. I can imagine that most of us have been breeding birds for decades and have never asked this question or have concerned ourselves with taxonomy, but still, taxonomy is closely related to our hobby.

Taxonomie in vogelvlucht

Taxonomie in vogelvlucht

Door Dirk Van den Abeele
Ornitho-Genetics VZW
MUTAVI, Research & Advice Group

Published in BVA-International magazine augustus 2017

 

Ik kan me voorstellen dat de meeste liefhebbers zich nu eens in de haren gaan krabben en afvragen wat is taxonomie, en meer nog, wat heeft dat eigenlijk met onze hobby te maken?
Een begrijpelijke reactie. Ik kan me voorstellen dat de meeste onder ons al decennialang vogels fokken en zich nog nooit die vraag gesteld hebben of zich ook maar over taxonomie bekommerd hebben, maar toch is taxonomie nauw verweven met onze hobby.

20 years of international names for Psittaciformes

20 years of international names for Psittaciformes

By Dirk Van den Abeele
Ornitho-Genetics VZW
MUTAVI, Research & Advice Group

Published BVA-International magazine december 2018

In July 2018 I had a meeting / lecture with a group of students in the Netherlands. Afterwards I had a talk with a few people. One of them mentioned that the international names, and I quote literally: “were actually the egg of Columbus and that they definitely helped the hobby and made it more creditable”. A comment which I did not expect from such a young person and which pleased me, I must admit. It becomes more and more obvious that most young people do appreciate this. But this has not always been the case.

20 Jaar internationale benamingen bij Psittaciformes

20 Jaar internationale benamingen bij Psittaciformes

Door Dirk Van den Abeele
Ornitho-Genetics VZW
MUTAVI, Research & Advice Group

Published BVA-International magazine december 2018

In juli 2018 had ik in Nederland een vergadering / lezing met een groep studenten. Na afloop had ik nog een gesprek met een aantal van hen. Een van deze mensen merkte me op dat de internationale namen, en ik citeer letterlijk: “Eigenlijk het ei van Columbus waren en dit de hobby heel wat vooruit geholpen en vooral heel wat geloofwaardiger gemaakt heeft”. Een uitspraak die ik, op dat moment, niet direct van een zo jong iemand verwacht had en me, toegegeven, toch plezier deed. Het is nu meer dan duidelijk dat de meeste jongere mensen deze zeker waarderen. Maar het is niet altijd zo geweest.

Seminars / lectures

Binnen een paar weken zullen we de lezingen / seminaries voor de tweede helft van 2019 bevestigen. Helaas kunnen we niet aan alle aanvragen voldoen, maar we doen ons best om zoveel mogelijk verenigingen te helpen.
Aanvragen voor 2020 kunnen vanaf nu ook al verstuurd worden.


Within a few weeks we will confirm the lectures / seminars for the second half of 2019. Unfortunately we cannot meet all requests, but we do our best to help as many associations as possible.
Applications for 2020 can also be sent from now on.

Breeding outcomes *dominant yellow* Agapornis fischeri

We are still looking for breeding outcomes from *dominant yellow* Agapornis fischeri.
Any possible information is welcome.
Important is:
– complete genome of the parents (colour and splitfactors)
– the colour of all chicks in the clutch, sex of these chicks.
– The colour and the sex of the offspring from these chicks, even if they are not *dominant yellow*

Ideal is a pedigree of two or three generations offspring from *dominant yellow*, even from the green youngsters.

Also mention if the youngsters are born in an aviary or when other birds are in the same cage.

Please send that info to: research@ogvzw.org
Many thanks in advance!

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