Viiriäiset

[Kananen8]

Lomilta palanut siikpikarja-asiantuntija lähetti vastauksen, jossa hän pohti kuvailemaani tapausta, ja syy on luultavasti seuraava:


Jikken Dobutsu. 1988 Apr;37(2):137-44.
Back-drawer: a behavioral mutant in Japanese quail.
Tsudzuki M1, Wakasugi N.
Author information
Abstract
The behavioral mutant "back-drawer" of Japanese quail is characterized by crouching and back-drawing action with the neck bending ventrally and occasional forward rolling. The abnormal behavior appears from hatching to 8 weeks of age. Back-drawers were classified into three types: (1) those showing the abnormality at hatching and dies within 5 days; (2) those showing the abnormality after 2 weeks of age and dies shortly thereafter; and (3) long survivors suffering from abnormal behavior, and showing gradual recovery. Back-drawer males are infertile when showing the abnormality, but can produce progeny after recovery. In contrast, the females tend to have a short life span and lack reproductive ability. Genetic analyses have indicated that this mutant character is controlled by 2 pairs of autosomal recessive genes.
http://www.ncbi.nlm.nih.gov/pubmed/3396630

[paulaliina]

Mielenkiintoista, kiitos että jaoit tietoa .

[paulaliina]

Aloituskysymykseen: olen ostanut kukon, joka tuotu Virosta (ehkä munana).