A Method for Preparing Morphologically Preserved Wildlife Fecal Specimens for Long-Term Ecological Studies

Area of Science:

• Ecology
• Conservation Biology
• Analytical Chemistry

Background:

• Wildlife feces are crucial for noninvasive ecological and conservation research.
• Traditional preservation methods fail to maintain both morphological integrity and biochemical composition of fecal samples.
• There is a need for a method that allows long-term preservation of fecal samples for biodiversity monitoring.

Purpose of the Study:

• To develop and evaluate a novel multistep infiltration method for preserving wildlife fecal specimens.
• To assess the long-term morphological, genetic, and chemical stability of preserved fecal samples.
• To enhance the utility of fecal samples as durable resources in ecological research and conservation.

Main Methods:

• A multistep infiltration process involving sodium carboxymethyl cellulose, sodium benzoate, clotrimazole, ethanol, pyrethroid emulsion, and polyvinylpyrrolidone solution.
• Specimens were prepared over a 7-day period.
• Preserved samples were stored for 18 months and analyzed for morphology, DNA integrity, and heavy metal content.

Main Results:

• The novel preservation method resulted in fecal specimens with high mechanical strength and durability.
• Preserved samples retained external morphology without mold or insect damage over 18 months.
• DNA integrity was maintained with a 100% extraction success rate, enabling accurate species identification and heavy metal detection (Cr, As, Pb).

Conclusions:

• The developed method provides a reliable way to preserve wildlife fecal samples long-term, maintaining their diagnostic value.
• This technique transforms transient fecal samples into durable resources, expanding their application in ecological studies and biodiversity conservation.
• The method supports broadened spatial and temporal analyses, strengthening the role of fecal samples in environmental monitoring.