RESUMO
Chukar partridges (Alectoris chukar) are frequently reared in captivity with the aim of producing fertile eggs and chicks. The aims of the present study were to evaluate the effect of male to female sex ratio on hatching rate and fertility and to determine the optimal temperature and time for egg storage and its effect on hatching rate and embryonic mortality in Chukar partridges. Maximum hatching rate and fertility rate were affected by male:female ratios during breeding (P < 0.05). The greatest embryonic mortality rate was with eggs that were stored at 25 °C for 15-20 d, however, the greatest hatching rate was when eggs were stored at 10 and 15 °C for 5 days. Storage time of Chukar partridge eggs can be extended for as long as 5 d, but longer storage periods can negatively affect hatching rate. In conclusion, a reduction of storage temperature and duration of time of storage in combination with reducing the sex ratio of the egg producing females and males during the breeding period might improve fertility, hatching rate and fertility of Chukar partridge eggs.
Assuntos
Criação de Animais Domésticos/métodos , Embrião não Mamífero/fisiologia , Fertilidade , Galliformes/embriologia , Galliformes/fisiologia , Óvulo/fisiologia , Razão de Masculinidade , Animais , Coeficiente de Natalidade , Feminino , Longevidade , Masculino , Reprodução , Temperatura , Fatores de TempoRESUMO
The complete mitochondrial genome of the Palawan peacock-pheasant Polyplectron napoleonis is 16,710 bp and contains 13 protein-coding genes, 2 rRNA genes, 22 tRNA genes and a control-region. All protein-coding genes use the standard ATG start codon, except for cox1 which has GTG start codon. Seven out of 13 PCGs have TAA stop codons, two have AGG (cox1 and nd6), and three PCGs (nd2, cox2 and nd4) have incomplete stop codon of just T- - nucleotide.
Assuntos
Galliformes/genética , Genoma Mitocondrial/fisiologia , Animais , Proteínas Aviárias/genética , Sequência de Bases , Proteínas Mitocondriais/genética , Dados de Sequência Molecular , RNA/genética , RNA Mitocondrial , RNA Ribossômico/genética , RNA de Transferência/genéticaRESUMO
The Germain's Peacock-Pheasant Polyplectron germaini (Aves, Galliformes, Phasianidae) is classified as Near Threatened on the IUCN Red List. The complete mitochondrial genome of P. germaini is 16,699 bp, consisting of 13 protein-coding genes, 2 rRNA, 22 tRNA genes and 1 control region. All of the 13 protein-coding genes have ATG as start codon. Eight of the 13 protein-coding genes have TAA as stop codon.
