Related Experiment Video
Updated: Jul 17, 2026
07:32
Murine Fecal Isolation and Microbiota Transplantation
Published on: May 26, 2023
The faecal microbiota and its influence on fur seal (Arctocephalus sp.) physiology
T Franciscus Scheelings1, David J Beale2, Thi Thu Hao Van3
1Melbourne Veterinary School, Faculty of Science, The University of Melbourne, Werribee, VIC, 3030, Australia. franciscus.scheelings@unimelb.edu.au.
Animal Microbiome
|July 16, 2026
Summary
The gut microbiota of Australian and New Zealand fur seals differs significantly between adults and pups. Early-life microbial communities in pups appear crucial for their rapid development and thermoregulation.
Area of Science:
- Marine Mammal Ecology
- Microbial Ecology
- Host-Microbe Interactions
Background:
- The gastrointestinal microbiota is vital for vertebrate physiology and adaptation.
- Previous studies on fur seal gut microbiota focused on taxonomy, leaving a gap in understanding its physiological influence.
- This study compares faecal microbiota and blood metabolomic profiles in Australian and New Zealand fur seals across age classes.
Purpose of the Study:
- To comprehensively compare the faecal microbiota and blood metabolomic profiles of Australian and New Zealand fur seals.
- To investigate age-related differences in microbial communities and their correlation with host physiology.
- To examine host-microbe interactions in marine mammals.
Main Methods:
- 16S rRNA gene sequencing for microbial community analysis.
- Untargeted metabolomics and lipidomics for blood metabolite profiling.
- Comparative analysis of adult and pup fur seals from Australia and New Zealand.
Main Results:
- Adult fur seals showed a conserved microbial structure (Bacillota, Fusobacteriota, Bacteroidota).
- Pups had lower microbial diversity with higher Actinobacteriota and Campylobacterota, and enriched metabolites for DNA synthesis and lipid metabolism.
- Correlations suggest early-life microbiota supports pup development, fat deposition, and thermoregulation.
Conclusions:
- Consistent microbial patterns exist within the Arctocephalus genus.
- Clear age-related differences in blood metabolic profiles were observed.
- Findings enhance understanding of host development, diet, and microbial ecology in fur seals, forming a basis for future research on marine mammal health.
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