Captivity Influences Gut Microbiota in Crocodile Lizards (Shinisaurus crocodilurus)

Area of Science:

• Conservation Biology
• Microbiome Research
• Herpetology

Background:

• The crocodile lizard (Shinisaurus crocodilurus), an ancient reptile, faces a high risk of extinction.
• Understanding gut microbiota differences between wild and captive populations is crucial for conservation management.
• Captivity is a key strategy for endangered species conservation, integrating microbiome studies.

Purpose of the Study:

• To investigate the differences in gut microbiota composition between wild and captive crocodile lizards.
• To provide fundamental data for the conservation and management of Shinisaurus crocodilurus.
• To compare gut microbiota across different ages (juveniles, adults) and wild populations.

Main Methods:

• Fecal samples were collected from two wild and one captive population of crocodile lizards.
• Microbiota composition was analyzed using 16S ribosomal RNA (rRNA) gene amplicon sequencing.
• Gut microbiota functions were predicted using the Kyoto Encyclopedia of Genes and Genomes (KEGG) database.

Main Results:

• The gut microbiota of crocodile lizards was predominantly composed of Firmicutes and Proteobacteria.
• No significant differences in gut microbiota were observed between juveniles and adults or between the two wild populations.
• Captivity led to increased gut microbial community richness and altered community structure, with higher abundances of genera like Epulopiscium and Glutamicibacter.

Conclusions:

• Captivity significantly influences the gut microbiota of the crocodile lizard, Shinisaurus crocodilurus.
• The findings provide essential insights into the gut microbiome of this endangered species in both wild and captive settings.
• Further research on diet, gut microbiota, and host health is recommended for effective conservation strategies.