Ectoparasite Dynamics in Small Mammal Hosts

Ectoparasites such as fleas, ticks and mites play a pivotal role in shaping the ecology, behaviour and health of small mammal populations. Their life cycles, often closely synchronised with host activity and environmental conditions, determine patterns of infestation intensity and prevalence. Host traits—including body mass, sex, reproductive status and immune function—interact with parasite life history, influencing host specificity and co-infestation dynamics. Environmental factors such as temperature, humidity, altitude and land‐use change further modulate parasite development and survival off-host, leading to spatial and temporal variation in infestation rates. These dynamics have far-reaching consequences for wildlife conservation and public health, since many ectoparasites serve as vectors of zoonotic agents. Advances in molecular diagnostics, spatial modelling and experimental manipulations have begun to unravel how host physiology and behaviour intersect with climatic and landscape drivers to determine parasite burden. A holistic understanding of these factors is essential for predicting the impacts of climate change, habitat disturbance and host community shifts on parasite transmission cycles and for designing targeted interventions to reduce disease risk in both wildlife and human populations.

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Ectoparasite Dynamics in Small Mammal Hosts publication trend

The graph below shows the total number of articles in ectoparasite dynamics in small mammal hosts across all publications each year (not limited to Nature Index journals).

Technical terms

Ectoparasite: A parasite that lives on the external surface of its host, such as fleas, ticks or mites.

Host specificity: The range of host species that a parasite can successfully infest and reproduce on.

Prevalence: The proportion of hosts in a population that are infested by at least one parasite at a given time.

Infestation intensity: The average number of parasites per infested host individual.

Vector competence: The intrinsic ability of an ectoparasite to acquire, maintain and transmit a pathogen.

Co-infestation: Simultaneous infestation of a single host by multiple parasite species or life stages.

References

1. Latitudinal distributions of the species richness, phylogenetic diversity, and functional diversity of fleas and their small mammalian hosts in four geographic quadrants. Ecography (2023).
2. Arthropod Ectoparasites of Two Rodent Species Occurring in Varied Elevations on Tanzania’s Second Highest Mountain. Biology (2023).
3. Complex effects of testosterone level on ectoparasite load in a ground squirrel: an experimental test for the immunocompetence handicap hypothesis. Parasites & Vectors (2024).