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Direct and indirect caecotrophy behaviour in paca (Cuniculus paca).

Leticia Guerra Aldrigui1, Sergio L G Nogueira-Filho1, Vanessa Souza Altino1

  • 1Laboratory of Applied Ethology, Universidade Estadual de Santa Cruz (UESC), Ilhéus, Brazil.

Journal of Animal Physiology and Animal Nutrition
|July 15, 2018
PubMed
Summary
This summary is machine-generated.

Caecotrophy, the re-ingestion of feces, is confirmed in pacas (Cuniculus paca). This behavior helps them retain microbial protein, crucial for their fruit-based diet.

Keywords:
comparative physiologycoprophagyfrugivoryhindgut fermenter

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Area of Science:

  • Zoology
  • Animal Nutrition
  • Digestive Physiology

Background:

  • Caecotrophy is vital for microbial protein retention in some mammals.
  • Pacas (Cuniculus paca), frugivorous rodents, may rely on caecotrophy for protein due to low-protein fruit diets.
  • Conflicting reports exist regarding caecotrophy in pacas.

Purpose of the Study:

  • To investigate the occurrence and characteristics of caecotrophy in pacas (Cuniculus paca).
  • To determine the influence of diet composition and feeding time on caecotrophy in pacas.

Main Methods:

  • Examination of digestive tracts from three adult pacas.
  • Behavioral observations of four pacas on controlled diets (pelleted feed and fruit/sweet potato mix).
  • Experimental feeding design (Latin square) varying diet presentation times (morning/afternoon).

Main Results:

  • Pacas possess a colonic separation mechanism typical of hystricomorph rodents.
  • Both direct and indirect caecotrophy were observed regularly.
  • Caecotrophs were richer in nitrogen and lower in fiber than hard feces.
  • Higher food intake reduced caecotrophy; afternoon feeding of fiber delayed caecotrophy and increased indirect forms.

Conclusions:

  • Caecotrophy is a confirmed and regular behavior in pacas (Cuniculus paca).
  • The timing of structural fiber ingestion influences the efficiency of the colonic separation mechanism.
  • Caecotrophy serves as a significant source of microbial protein for pacas.