Psittacula cyanocephala

About: Psittacula cyanocephala is a research topic. Over the lifetime, 17 publications have been published within this topic receiving 101 citations.

Exogenous melatonin may act as a reproductive-phase dependent modulator of the relationship in morphology between pineal and adrenal cortex in male Blossomheaded parakeet (Psittacula cyanocephala) and Indian Weaver bird (Ploceus philippinus)

Abstract: The influence of melatonin, at a daily dose of 250 μg/100 g b.w. for ten consecutive days on morphological parameters of the pineal and adrenal cortex was investigated in two diverse avian species, Blossomheaded parakeet (Psittacula cyanocephala) and Indian Weaver bird (Ploceus philippinus). The results suggest that melatonin administered during the breeding phase caused stimulation of the adrenal cortex as evidenced from the significant increase in adrenocortical cord width and nuclear size in both avian species. However, the pineal gland in both species remained unaltered during this phase. On the contrary, melatonin given during the non‐breeding phase failed to alter the adrenal cortex but stimulated the pineal gland activity as evidenced from the significant increase in pinealocyte nuclear diameter in both species alike. It is suggested that melatonin can act as a reproductive‐phase dependent modulator of the pineal gland and adrenal cortex in these birds.

Complete mitogenome of endemic Plum-headed parakeet Psittacula cyanocephala – characterization and phylogenetic analysis

Abstract: Psittacula cyanocephala is a parakeet endemic to the Indian sub-continent, widespread in the illegal bird trade. Previous studies on Psittacula parakeets have highlighted taxonomic ambiguities, warranting further studies to resolve such issues. Since the mitochondrial genome provides useful information about a species concerning its evolution and phylogenetics, we sequenced the complete mitogenome of P. cyanocephala using NGS, validated 38.86% of the mitogenome using Sanger Sequencing and compared it with other available whole mitogenomes of Psittacula. The complete mitogenome of the species was 16814 bp in length with 54.08% AT composition. P. cyanocephala mitogenome comprises of 13 protein-coding genes, 2 rRNAs and 22 tRNAs. P. cyanocephala mitogenome organization was consistent with other Psittacula mitogenomes. Comparative codon usage analysis indicated the role of natural selection on Psittacula mitogenomes. Strong purifying selection pressure was observed maximum on nad1 and nad4l genes. The mitochondrial control region of all Psittacula species displayed the ancestral avian CR gene order. Phylogenetic analyses revealed the Psittacula genus as paraphyletic nature, containing at least 4 groups of species within the same genus, suggesting its taxonomic reconsideration. Our results provide useful information for developing forensic tests to control the illegal trade of the species, scientific basis for phylogenetic revision of genus Psittacula.

Complete mitogenome of endemic plum-headed parakeet Psittacula cyanocephala - characterization and phylogenetic analysis.

Abstract: Psittacula cyanocephala is an endemic parakeet from the Indian sub-continent that is widespread in the illegal bird trade. Previous studies on Psittacula parakeets have highlighted taxonomic ambiguities, warranting studies to resolve the issues. Since the mitochondrial genome provides useful information concerning the species evolution and phylogenetics, we sequenced the complete mitogenome of P. cyanocephala using NGS, validated 38.86% of the mitogenome using Sanger Sequencing and compared it with other available whole mitogenomes of Psittacula. The complete mitogenome of the species was 16814 bp in length with 54.08% AT composition. P. cyanocephala mitogenome comprises of 13 protein-coding genes, 2 rRNAs and 22 tRNAs. P. cyanocephala mitogenome organization was consistent with other Psittacula mitogenomes. Comparative codon usage analysis indicated the role of natural selection on Psittacula mitogenomes. Strong purifying selection pressure was observed maximum on nad1 and nad4l genes. The mitochondrial control region of all Psittacula species displayed the ancestral avian CR gene order. Phylogenetic analyses revealed the Psittacula genus as paraphyletic nature, containing at least 4 groups of species within the same genus, suggesting its taxonomic reconsideration. Our results provide useful information for developing forensic tests to control the illegal trade of the species and scientific basis for phylogenetic revision of the genus Psittacula.

Prevalence of Chlamydia psittaci in imported psittacine birds from 1981 to 1983.

Abstract: The prevalence of Chlamydia psittaci was determined in psittacine birds dying or wasting soon after importation. During the past 3 years from 1981 to 1983, C. psittaci was isolated from 70.5% (266/377) of the psittacines examined. The yearly chlamydial isolation rate was 77.5% (131/169) in 1981, 49.1% (27/55) in 1982 and 70.6% (108/153) in 1983. The parakeets, Psittacula krameri manillensis, Psittacula cyanocephala and Psittacula alexandri fasciate and parrot, Amazona aestiva yield the most number of chlamydia-positive birds.