ABSTRACT
We used conventional chromosomal staining to describe the karyotype of the critically endangered Lear's macaw, Anodorhynchus leari Bonaparte 1856. A diploid number of 2n = 70 and a karyotype similar to that of its congener Anodorhynchus hyacinthinus suggests that chromosomal rearrangements were not the main evolutionary mechanism in the genus.
Subject(s)
Animals , Birds/genetics , Chromosomes , Karyotyping , PsittaciformesABSTRACT
Os dados utilizados no presente estudo, referem-se a 129 registros de idade ao primeiro parto (IPP), 789 registros de intervalos de partos (IEP) e a 793 registros de pesos ao nascimento (PN). As médias gerais para IPP, IEP e PN foram respectivamente 1234 dias, 466 dias e 29,4kg. Dos efeitos fixos estudados, tiveram influência significativa sobre a IPP, o quinquênio do parto, sobre o IEP, o ano de nascimento e a ordem do parto sobre o PN, o ano de nascimento e sexo do produto. As estimativas de herdabilidade para IPP, IEP e PN foram, respectivamente: 0,35, 0,08 e 0,05.
The data used in this study are record from 129 Age at First Calving (AFC), 789 Calving lntervals (CI) and 793 Birth Weight (BW). General means for AFC, CI, and BW were 1234 days, 466 days and 29,4kg, respectively. The following fixed effects had significative influence: a) year period of calving on Age at First Calving; b) year of birth and calving arder on Calving lntervals; c) year of birth and sex of calf on Birth Weigth. Estimates for heritability for AFC, Cl and BW were 0.35, 0.08 and 0.05, respectively.
