Simultaneous estimation of seasonal population density, habitat preference and catchability of wild boars based on camera data and harvest records
Open Access
- 19 August 2020
- journal article
- research article
- Published by The Royal Society in Royal Society Open Science
- Vol. 7 (8)
- https://doi.org/10.1098/rsos.200579
Abstract
Analyses of life history and population dynamics are essential for effective population control of wild mammals. We developed a model for the simultaneous estimation of seasonal changes in three parameters—population density, habitat preference and trap catchability of target animals—based on camera-trapping data and harvest records. The random encounter and staying time model, with no need for individual recognition, is the core component of the model—by combining this model with the catch-effort model, we estimated density at broad spatial scales and catchability by traps. Here, the wild boar population in central Japan was evaluated as a target population. We found that the estimated population density increased after the birth period and then decreased until the next birth period, mainly due to harvesting. Habitat preference changed seasonally, but forests having abandoned fields nearby were generally preferred throughout the season. These patterns can be explained by patterns of food availability and resting or nesting sites. Catchability by traps also changed seasonally, with relatively high values in the winter, which probably reflected changes in the attractiveness of the trap bait due to activity changes in response to food scarcity. Based on these results, we proposed an effective trapping strategy for wild boars, and discussed the applicability of our model to more general conservation and management issues.Funding Information
- Environmental Technology Development Fund, Ministry for the Environment, Japan (4-1704)
- Grant-in-Aid for JSPS Fellows (17H01916)
This publication has 45 references indexed in Scilit:
- Research priorities for managing invasive wild pigs in North AmericaThe Journal of Wildlife Management, 2018
- Challenges and science-based implications for modern management and conservation of European ungulate populationsMammal Research, 2017
- Understanding basic species population dynamics for effective control: a case study on community-led culling of the common myna (Acridotheres tristis)Biological Invasions, 2013
- Predicting the status of wild deer as hosts of Mycobacterium bovis infection in BritainEuropean Journal of Wildlife Research, 2011
- Effects of sika deer on vegetation in Japan: A reviewBiological Conservation, 2009
- Estimating animal density using camera traps without the need for individual recognitionJournal of Applied Ecology, 2008
- Use, misuse and extensions of “ideal gas” models of animal encounterBiological Reviews, 2007
- Beyond control: wider implications for the management of biological invasionsJournal of Applied Ecology, 2006
- Expanding ranges of wild and feral deer in Great BritainMammal Review, 2005
- Ecological Impacts of Deer OverabundanceAnnual Review of Ecology, Evolution, and Systematics, 2004