| avian mycobacteriosis in companion birds: 20-year survey. | the causative agents of avian mycobacteriosis in pet birds are rarely identified. the aim of this study is to add information about the etiology of avian mycobacteriosis. the identification of mycobacterium species in 27 cases of avian mycobacteriosis in pet birds was investigated by polymerase chain reaction (pcr) and sequencing of a rrna hypervariable region. avian mycobacteriosis appeared to be an infrequent diagnosis. interestingly, a few cases of avian mycobacteriosis were recorded in very ... | 2009 | 18789612 |
| [pox in the cowled siskin (carduelis cucullata)]. | | 1982 | 6299028 |
| how to deal with ground truthing affected by human-induced habitat change?: identifying high-quality habitats for the critically endangered red siskin. | species distribution models (sdm) can be valuable for identifying key habitats for conservation management of threatened taxa, but anthropogenic habitat change can undermine sdm accuracy. we used data for the red siskin (spinus cucullatus), a critically endangered bird and ground truthing to examine anthropogenic habitat change as a source of sdm inaccuracy. we aimed to estimate: (1) the red siskin's historic distribution in venezuela; (2) the portion of this historic distribution lost to vegeta ... | 2018 | 29375758 |
| a genetic mechanism for sexual dichromatism in birds. | sexual dichromatism, a difference in coloration between males and females, may be due to sexual selection for ornamentation and mate choice. here, we show that carotenoid-based dichromatism in mosaic canaries, a hybrid phenotype that arises in offspring of the sexually dichromatic red siskin and monochromatic canaries, is controlled by the gene that encodes the carotenoid-cleaving enzyme β-carotene oxygenase 2 (bco2). dichromatism in mosaic canaries is explained by differential carotenoid degrad ... | 2020 | 32527835 |
| genetic basis for red coloration in birds. | the yellow and red feather pigmentation of many bird species [1] plays pivotal roles in social signaling and mate choice [2, 3]. to produce red pigments, birds ingest yellow carotenoids and endogenously convert them into red ketocarotenoids via an oxidation reaction catalyzed by a previously unknown ketolase [4-6]. we investigated the genetic basis for red coloration in birds using whole-genome sequencing of red siskins (spinus cucullata), common canaries (serinus canaria), and "red factor" cana ... | 2016 | 27212400 |