Modelling Reintroduced Populations: The State of the Art and Future Directions

Armstrong, Doug P.; Reynolds, Michelle H.

doi:10.1002/9781444355833.ch6

Cited by 81 publications

(99 citation statements)

References 135 publications

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“…Therefore, being able to identify what makes habitat suitable is an issue that is at the heart of assisted colonization. Armstrong & Reynolds (2012) argue for the systematic use of population models when planning reintroductions and provide a detailed step-by-step guide for building them. Using population models when planning reintroduction can yield invaluable knowledge on how to plan and implement a translocation project.…”

Section: Assisted Colonization As An Adaptation Tool To Climate Changementioning

confidence: 99%

“…This involves building a population model and investigating the impact of different management decisions (i.e. the scenarios) on the population trajectory (Armstrong & Reynolds, 2012). The outcomes of the different runs are assessed against a specific objective set for the population.…”

Section: Recommendations On Planning and Implementing Assisted Colonimentioning

confidence: 99%

“…Finally, Armstrong & Reynolds (2012) suggest five topics related to population modelling that warrant further research. While those are offered in the context of reintroduction, advances on those subjects would benefit assisted colonization or indeed any form of translocation.…”

Section: Further Research Requiredmentioning

confidence: 99%

“…Inbreeding and loss of genetic diversity could have a significant impact on the long-term viability of any population, but especially those established through translocation as they are generally small. However, genetic issues are seldom included into predictive population models (Armstrong & Reynolds, 2012), which may be an impediment to our ability to accurately predict the dynamics of translocated populations.…”

Section: Further Research Requiredmentioning

confidence: 99%

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Maximizing the success of assisted colonizations

Chauvenet

Ewen

Armstrong

et al. 2012

Animal Conservation

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Climate change is causing spatio-temporal shifts in environmental conditions, and species that are not able to track suitable environments may face increased risks of extinction. Assisted colonization, a form of translocation, has been proposed as a tool to help species survive the impacts of climate change. Unfortunately, translocations generally have a low success rate, a well-documented fact that is not considered in most of the recent literature on assisted colonization. One of the main impediments to translocation success is inadequate planning. In this review, we argue that by using well-known analytical tools such as species distribution models and population dynamics modelling we can maximize the success of assisted colonization. In particular, we present guidelines as to which questions should be investigated when planning assisted colonization and suggest methods for answering them. Finally, we also highlight further implementation and research issues that remain to be solved for assisted colonizations to be efficient climate change adaptation tools.

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Section: Assisted Colonization As An Adaptation Tool To Climate Changementioning

confidence: 99%

Section: Recommendations On Planning and Implementing Assisted Colonimentioning

confidence: 99%

Section: Further Research Requiredmentioning

confidence: 99%

Section: Further Research Requiredmentioning

confidence: 99%

See 2 more Smart Citations

Maximizing the success of assisted colonizations

Chauvenet

Ewen

Armstrong

et al. 2012

Animal Conservation

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“…Strategic use of translocation has been explored (primarily theoretically through modeling and quantitative decision frameworks) as a tool for increasing the resilience and persistence of endangered species by fostering healthy metapopulation structure (Lubow 1996, Rout et al 2007). Similar matters have been modeled in the context of designing optimal reintroduction strategies (reviewed in Armstrong & Reynolds 2012). Implementing these metapopulation management concepts in practice is quite rare.…”

Section: Introductionmentioning

confidence: 99%

A two-stage translocation strategy for improving juvenile survival of Hawaiian monk seals

Baker

Harting²,

Littnan³

2013

Endang. Species. Res.

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We propose a two-stage translocation strategy to conserve metapopulations of endangered species. The concept takes advantage of variation in vital rates among subpopulations to increase individual fitness, improve species status, and maintain metapopulation structure for long-term resiliency. We simulate two-stage translocation scenarios for conserving the Hawaiian monk seal Monachus schauinslandi, a critically endangered species which exhibits highly variable juvenile, but consistently favorable adult, survival rates. Moving young seals from areas of lower to higher juvenile survival and subsequently returning them to their source site once they have reached an appropriate age improves population reproductive value. We present a decision framework for implementing two-stage translocation in a manner that minimizes risks while increasing the likelihood of desired outcomes. Two-stage translocation may be effective for metapopulations of other rare species which exhibit variation in vital rates among subpopulations and a life-stage bottleneck due to factors that are not amenable to in situ mitigation.

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Identifying temporal dynamics in post‐release survival of a restored large ungulate

Pero

Chitwood

Hildreth

et al. 2023

Ecol Sol and Evidence

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Wildlife translocation is an important conservation tool for restoring species and reducing global biodiversity decline; however, this practice is challenging for wildlife, and translocated individuals must adjust to their release landscapes for restoration success. The period following release is a vulnerable time for wildlife and determining when animals acclimate following translocation improves long‐term estimates of population dynamics and allows researchers to efficiently tailor translocation design and post‐release management to each population's needs. We evaluated demographic acclimation and investigated changes in post‐release survival of a population of 106 elk Cervus canadensis translocated to Missouri, USA, in 2011–2013 using generalized survival modelling. We defined the acclimation period as the duration of time prior to stabilization in mortality risk relative to time from release, and we evaluated acclimation duration from flexible plots of estimated mortality hazards across time. We simultaneously investigated factors contributing to post‐release survival and compared survival rates and mortality sources observed during acclimation and post‐acclimation periods. Elevated mortality risk for translocated elk spanned a 5‐month acclimation period following release, with an additional 1‐year period reflecting reduced, but still elevated, mortality hazards. Baseline hazards during the initial 5‐month acclimation period were approximately four times higher than the subsequent 4.4 years following release. Release cohort, but not age class or sex, was associated with post‐release mortality risk, and mortality sources within the acclimation period tended to be undetermined with greater frequency relative to mortalities occurring after the acclimation period. Our results highlight the utility of flexible modelling approaches to evaluate dynamic post‐release responses of translocated populations. Translocated elk demonstrated a pronounced demographic acclimation period that spanned 5 months following release. Changes in mortality sources and the timing of stabilization in mortality hazards suggest that demographic acclimation in translocated elk was associated with adjustments in physiological stress and movement rates which stabilized over a similar post‐release duration. Improving post‐release monitoring and assessment of restored populations by evaluating temporal dynamics of manifold biological and ecological responses as translocated animals acclimate to their new landscapes is vital to successful restoration efforts.

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Modelling Reintroduced Populations: The State of the Art and Future Directions

Cited by 81 publications

References 135 publications

Maximizing the success of assisted colonizations

Maximizing the success of assisted colonizations

A two-stage translocation strategy for improving juvenile survival of Hawaiian monk seals

Identifying temporal dynamics in post‐release survival of a restored large ungulate

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