dc.contributor.advisor | -, - | |
dc.contributor.author | Iannacone, José | |
dc.date.accessioned | 2020-09-29T02:46:32Z | |
dc.date.available | 2020-09-29T02:46:32Z | |
dc.date.issued | 2020 | |
dc.identifier.uri | https://hdl.handle.net/20.500.14138/3237 | |
dc.description | Parasites are globally widespread pathogenic organisms, which impose important selective forces
upon their hosts. Thus, in accordance with the Adjustment to parasite pressure hypothesis, it is
expected that defenses among hosts vary relative to the selective pressure imposed by parasites.
According to the latitudinal gradient in diversity, species richness and abundance of parasites peak
near the equator. The uropygial gland is an important defensive exocrine gland against pathogens
in birds. Size of the uropygial gland has been proposed to vary among species of birds because of
divergent selection by pathogens on their hosts. Therefore, we should expect that bird species
from the tropics should have relatively larger uropygial glands for their body size than species
from higher latitudes. However, this hypothesis has not yet been explored. Here, we analyze the
size of the uropygial gland of 1719 individual birds belonging to 36 bird species from 3 Neotropical
(Peru) and 3 temperate areas (Spain). Relative uropygial gland volume was 12.52% larger in bird
species from the tropics than from temperate areas. This finding is consistent with the relative size
of this defensive organ being driven by selective pressures imposed by parasites. We also explored
the potential role of this gland as a means of avoiding haemosporidian infection, showing that spe-
cies with large uropygial glands for their body size tend to have lower mean prevalence of haemo-
sporidian infection, regardless of their geographical origin. This result provides additional support
for the assumption that secretions from the uropygial gland reduce the likelihood of becoming
infected with haemosporidians. | es_ES |
dc.description.uri | Trabado de investigacion | es_ES |
dc.format | application/pdf | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | Universidad Ricardo Palma | es_ES |
dc.relation | info:eu-repo/semantics/article | es_ES |
dc.rights | info:eu-repo/semantics/openAccess | es_ES |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/4.0/ | es_ES |
dc.source | Universidad Ricardo Palma | es_ES |
dc.source | Repositorio institucional - URP | es_ES |
dc.subject | Parasites | es_ES |
dc.subject | haemosporidian infection | es_ES |
dc.title | Exploring the adjustment to parasite pressure hypothesis: differences in uropygial gland volume and haemosporidian infection in palearctic and neotropical birds | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
thesis.degree.discipline | Biología | es_ES |
thesis.degree.grantor | Universidad Ricardo Palma. Facultad de Biología | es_ES |
thesis.degree.level | Maestría | es_ES |
thesis.degree.program | - | es_ES |
thesis.degree.name | - | es_ES |
dc.identifier.doi | https://doi.org/10.1093/cz/zoaa037 | es_PE |
dc.publisher.country | PE | |