Is the ‘canine surrogacy approach’ (CSA) still valid for dogs and humans in market-oriented and subsistence-oriented communities in Brazil?

@article{AbdallaFilho2019IsT,
  title={Is the ‘canine surrogacy approach’ (CSA) still valid for dogs and humans in market-oriented and subsistence-oriented communities in Brazil?},
  author={Adibe Luiz Abdalla Filho and Gabriela Bielefeld Nardoto and Leonardo de Aro Galera and Janaina Leite de Souza and Luiza Santos Reis and Yeleine Almoza Hern{\'a}ndez and Rebeca Sales and Daniel Guimar{\~a}es Gerardi and Luiz Ant{\^o}nio Martinelli},
  journal={Isotopes in Environmental and Health Studies},
  year={2019},
  volume={55},
  pages={227 - 236}
}
ABSTRACT Based on the assumptions that human food is available for dogs and isotope diet–tissue differences are similar in dogs and humans, the ‘canine surrogacy approach’ (CSA) has been used to infer patterns of ancient populations. The goal of this study was to test the CSA in urban (Brasília and Piracicaba) and in rural (Ubatuba and Maraã) areas. The hair C and N isotope ratios of modern dogs were compared with those of human fingernails from different regions of Brazil. Our CSA results… 
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Citation Type

Identifying the composition of commercial Brazilian cat food with stable isotopes of carbon and nitrogen
TLDR
It is concluded that chicken and pork seem to be the dominant ingredients in most of the samples, with larger proportions in wet cat food, which raises the question whether this should be mentioned on package labels.
Mapping carbon and nitrogen isotopic composition of fingernails to demonstrate a rural-urban nutrition transition in the Center-West, Northeast, and Amazon regions of Brazil.
TLDR
Investigating diet patterns among rural and urban populations of the Center-West, Northeast, and Amazon regions of Brazil through the carbon and nitrogen isotopic composition of fingernails suggested that "market integration" does not affect everyone equally in each community.

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