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Net production efficiency (NPE) is the efficiency at which organisms assimilate energy into biomass for the next trophic level. Due to low metabolic rates and less energy spent on thermoregulatory processes, the NPE of ectotherms (cold-blooded animals) is 10 times higher than endotherms (warm-blooded animals).
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Donkey Slaughter in Brazil: A Regulated Production System or Extractive Model?

Sharacely de Souza Farias1, Aline Rocha Silva1, Rayane Caroline Medeiros do Nascimento1

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This study found that donkeys in Brazil, destined for slaughter, exhibit poor health indicators like low body condition and inflammation. These findings suggest mistreatment and an unsustainable extractive model for donkey skin trade.

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Area of Science:

  • Veterinary Medicine
  • Animal Welfare Science
  • Agricultural Economics

Background:

  • Donkeys historically served as vital draft and transport animals.
  • Mechanization reduced their economic role, leading to exploitation for industries like ejiao production.
  • Unregulated donkey slaughter in Brazil raises significant animal welfare concerns.

Purpose of the Study:

  • To evaluate the donkey slaughter production system in Brazil.
  • To identify systemic failures impacting animal welfare through physical and hematological assessments.
  • To assess the health status of donkeys intended for slaughter.

Main Methods:

  • Conducted physical assessments on 104 abandoned donkeys, including sex determination, age estimation, body condition score (BCS), and neck condition score.
  • Performed hematological assessments measuring hematocrit (HT), total plasma protein (TPP), and plasma fibrinogen concentration.
  • Analyzed data to characterize the health and welfare of the study group.

Main Results:

  • The majority of donkeys were entire males (48.08%) with a median age of 15.1 years.
  • Most animals presented a low body condition score (2 or 3; 52%) and neck condition score (1; 37.5%).
  • Hematological results indicated altered plasma fibrinogen (>400 mg/dL) and total plasma protein (<7.5 g/dL), suggesting malnutrition and systemic inflammation.

Conclusions:

  • Donkeys in the Brazilian slaughter chain exhibit poor health, characterized by malnutrition and systemic inflammation.
  • The current donkey production system appears to operate as an unsustainable extractive model, involving mistreatment.
  • Urgent regulatory standards are needed to ensure donkey welfare in Brazil.