title: Vitamin A requirements of alipochromatic ('recessive-white') and coloured canaries (Serinus canaria) during the breeding season.
abstract: Six pairs of alipochromatic ('recessive-white') canaries (Serinus canaria) and six pairs of coloured canaries were kept through a complete breeding cycle while being fed a diet providing 12,000 iu vitamin A/kg. The eggs of three pairs (one recessive-white and two coloured) were all unfertilised and there were only 23 hatchlings (14 recessive-white and nine coloured), of which 14 (10 recessive-white and four coloured) were alive after the first moult. However, there was no clinical, biochemical or pathological evidence that the recessive-white canaries were suffering from vitamin A deficiency or that the coloured canaries were suffering from vitamin A toxicity, suggesting that the diet met the vitamin A requirements of both groups.
authors.affiliation: Clinic for Birds and Reptiles, University of Leipzig, An den Tierkliniken 17, D-04103 Leipzig, Germany.
authors.forename: S E
authors.initials: SE
authors.lastname: Preuss
authors.forename: T
authors.initials: T
authors.lastname: Bartels
authors.forename: V
authors.initials: V
authors.lastname: Schmidt
authors.forename: M-E
authors.initials: ME
authors.lastname: Krautwald-Junghanns
mesh_terms: D000818:Animals; D001715:Bird Diseases / Q000453:epidemiology / Q000401:mortality; D001947:Breeding; D002171:Canaries / Q000254:growth & development / Q000502:physiology*; D005260:Female; D008297:Male; D009751:Nutritional Requirements; D010058:Oviposition / Q000502:physiology*; D012098:Reproduction / Q000502:physiology; D015996:Survival Rate; D014801:Vitamin A / Q000008:administration & dosage* / Q000633:toxicity; D014802:Vitamin A Deficiency / Q000453:epidemiology / Q000401:mortality / Q000662:veterinary; D014815:Vitamins / Q000008:administration & dosage* / Q000633:toxicity
chemical_list: D014815:Vitamins; D014801:Vitamin A