Does urbanization influence the diet of a large snake?

Area of Science:

• Ecology
• Zoology
• Urban Ecology

Background:

• Urbanization increases synanthropic species, potentially benefiting urban predators.
• Dugites (Pseudonaja affinis) are common elapid snakes in Western Australia, often found in urbanized areas.

Purpose of the Study:

• To investigate how urbanization affects the feeding ecology of dugite snakes.
• To test predictions regarding prey frequency, meal size, prey type, prey diversity, and body mass in urban versus non-urban dugites.

Main Methods:

• Dietary analysis of 453 dugite specimens from museum and road-kill collections.
• Statistical correction for size, sex, season, and temporal collection biases.
• Comparison of feeding ecology and body mass between urban and non-urban dugite populations.

Main Results:

• Urban dugites were smaller and lighter than non-urban specimens, contrary to predictions.
• Urban snakes were less likely to contain prey and had smaller meals.
• Dugites did not show increased consumption of non-native prey or reduced prey diversity in urban areas.

Conclusions:

• Urbanization does not benefit dugite snake feeding ecology; they are less likely to have food and are lighter.
• Unlike other urban carnivores, dugites do not appear to exploit urban food resources effectively.
• Snakes may not exhibit consistent size or dietary adaptations to urbanization seen in other carnivore groups.