| genomic organization of repetitive dna in woodpeckers (aves, piciformes): implications for karyotype and zw sex chromosome differentiation. | birds are characterized by a low proportion of repetitive dna in their genome when compared to other vertebrates. among birds, species belonging to piciformes order, such as woodpeckers, show a relatively higher amount of these sequences. the aim of this study was to analyze the distribution of different classes of repetitive dna-including microsatellites, telomere sequences and 18s rdna-in the karyotype of three picidae species (aves, piciformes)-colaptes melanochloros (2n = 84), colaptes campe ... | 2017 | 28081238 |
| helping enhances productivity in campo flicker (colaptes campestris) cooperative groups. | reproductive adults in many bird species are assisted by non-breeding auxiliary helpers at the nest, yet the impact of auxiliaries on reproduction is variable and not always obvious. in this study, we tested hamilton's rule and evaluated the effect of auxiliaries on productivity in the facultative cooperative breeder campo flicker (colaptes campestris campestris). campo flickers have a variable mating system, with some groups having auxiliaries and others lacking them (i.e., unassisted pairs). m ... | 2015 | 26004264 |
| genetic diversity of toxoplasma gondii isolates obtained from free-living wild birds rescued in southeastern brazil. | recent studies carried out in brazil have shown that strains from the same toxoplasma gondii genotype can infect humans, domestic animals (dogs and cats) and animals slaughtered for human consumption (pigs, sheep, goats, and chickens), suggesting a common infection route. however, little is known about the importance of free-living wild birds within this epidemiological context. the objective of this work was to isolate, genotype, and evaluate the virulence for mice of new isolates of t. gondii ... | 2018 | 30479944 |
| a review of the feather mite family gabuciniidae gaud amp; atyeo (acariformes: astigmata: pterolichoidea) of brazil, with descriptions of eleven new species. | the feather mite family gabuciniidae currently includes 16 genera and approximately 65 described species associated with birds of nine orders, with the greatest diversity on accipitriformes. in this study, 11 new species are described from the following hosts: aetacarus accipiter sp. nov. from the bicolored hawk accipiter bicolor (vieillot, 1817) (accipitriformes: accipitridae), capitolichus campoflicker sp. nov. from the campo flicker colaptes campestris (vieillot, 1818) (piciformes: picidae), ... | 2020 | 32230117 |
| distribution of cr1-like transposable element in woodpeckers (aves piciformes): z sex chromosomes can act as a refuge for transposable elements. | birds have relatively few repetitive sequences compared to other groups of vertebrates; however, the members of order piciformes (woodpeckers) have more of these sequences, composed mainly of transposable elements (te). the te most often found in birds is a retrotransposon chicken repeat 1 (cr1). piciformes lineages were subjected to an expansion of the cr1 elements, carrying a larger fraction of transposable elements. this study compared patterns of chromosome distribution among five bird speci ... | 2018 | 30499043 |