Senescência atuarial em Pithys albifrons (Linnaeus, 1766)
The best way to understand biological processes that occur in humans is to use other species as comparative models. One of the areas that best uses model species are studies on senescence. Birds are of special interest in these studies since they are longer lived than its size and metabolic rates...
| Autor principal: | Martins, Pedro Vítor Ribeiro |
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| Grau: | Dissertação |
| Idioma: | por |
| Publicado em: |
Instituto Nacional de Pesquisas da Amazônia - INPA
2020
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| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/12047 |
| Resumo: |
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The best way to understand biological processes that occur in humans is to use other species
as comparative models. One of the areas that best uses model species are studies on
senescence. Birds are of special interest in these studies since they are longer lived than its
size and metabolic rates would predict. Although initially birds were considered immune to
actuarial senescence, the accumulation of information in the second half of twentieth century
on the variation in survival rates with age in birds changed this paradigm. The senescence
studies , however, are limited, especially due the difficulty in collecting data on age of death
in birds. This work use new methods of measuring age in birds and calculate senescence rates
in Pithys albifrons, a neotropical passerine. The results demonstrate that actuarial senescence
in P. albifrons is non-existent or negligible. The estimated demographic parameters for P.
albifrons demonstrate that low senescence rate does not guarantee this species a high
longevity. The longevity of this species is similar to the species of the same weight from
temperate region. The low longevity of this species is more related to the small size and the
low annual survival rate. This article presents evidence of a species of neotropical bird that
shows no signs of actuarial senescence and that the longevity of the species is more related to
their survival rates than it is with senescence rates. |