Nestling growth and body condition of critically endangered Orange-bellied Parrots <i>Neophema chrysogaster</i>

Stojanović, Dejan; Alves, Fernanda; Webb, Matthew; Troy, Shannon; Young, Catherine; Rayner, Laura; Crates, Ross; Cook, Henry; Heinsohn, Rob

doi:10.1080/01584197.2020.1743186

Cited by 8 publications

(10 citation statements)

References 31 publications

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“…Based on our index of nestling body condition (Stojanovic, et al . 2020), we identified candidate nestlings for rescue. We also evaluated the efficacy of nest competitor control (Stojanovic, et al .…”

Section: Resultsmentioning

confidence: 99%

“…2019; Stojanovic, et al . 2020) and provided managers with new options for data collection and intervention to address reproductive problems facing the species. We hope our study provides a useful template for practitioners to trial these techniques and evaluate their efficacy on other species.…”

Section: Resultsmentioning

confidence: 99%

“…During this project, we developed a body condition index as a way to evaluate nestling condition of Orange‐bellied Parrots (Stojanovic, et al . 2020). This was a useful, empirical way of assessing which nestlings might benefit from intervention and rescue.…”

Section: Discussionmentioning

confidence: 99%

“…We suggest that nestlings that fall below one standard deviation for first or middle‐hatched nestlings (Stojanovic, et al . 2020) could be considered for intervention/rescue. If such nestlings are identified before they die, and exhibit no symptoms of infectious disease, rescue could be implemented via fostering to other wild nests with small broods (if available).…”

Section: Discussionmentioning

confidence: 99%

“…We monitored nestling condition (for the rescue component of the work) using the approach described by Stojanovic et al . (2020) for estimating body condition. We tested all captive animals selected for use as donors of eggs or nestlings for Psittacine beak and feather disease virus (BFDV) from blood samples (Troy & Kuechler 2018).…”

Section: Methodsmentioning

confidence: 99%

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Evaluation of intervention aimed at improving reproductive success in Orange‐bellied Parrots Neophema chrysogaster: Lessons, barriers and successes

Stojanović¹,

Young²,

Troy³

et al. 2020

Eco Management Restoration

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Assessing feasibility and identifying constraints that affect project implementation is a crucial step for planning long-term species recovery actions for field-based programs. We report on the outcomes of a conservation intervention on the most endangered parrot in the world, the Orange-bellied Parrot (Neophema chrysogaster). We aimed to trial new techniques to increase reproductive success of wild nests and address key knowledge gaps. We aimed to achieve higher reproductive success using (i) intervention where fertile eggs or nestlings would be fostered from captivity to wild nests that suffered infertility or had small brood sizes and (ii) rescuewhere wild-born nestlings would be removed from nests if they were ailing and either fostered to another nest or hand reared to improve their survival. Our project provided proof of principle that it is possible to implement intensive, individual-level monitoring and intervention (via fostering of nestlings to infertile nests) to address reproductive problems for the Orange-bellied Parrot. However, we also found important factors that hindered our ability to achieve project aims (management of biosecurity), and identified unexpected factors that have important implications for future application of these techniques (nest abandonment from video camera deployment, rapid death of unhealthy nestlings hindering rescue attempts). Our project tested techniques and tools to provide new approaches for fighting extinction of the Orange-bellied Parrot, and yielded important new information about the species ecology and management options.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations

Evaluation of intervention aimed at improving reproductive success in Orange‐bellied Parrots Neophema chrysogaster: Lessons, barriers and successes

Stojanović¹,

Young²,

Troy³

et al. 2020

Eco Management Restoration

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Conservation management in the context of unidentified and unmitigated threatening processes

et al. 2023

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The decision to intervene in endangered species management is often complicated. Migratory species exemplify this difficulty because they experience diverse threats at different times and places that can act cumulatively and synergistically on their populations. We use population viability analysis (PVA) to compare potential conservation interventions on the critically endangered, migratory Orange-bellied Parrot Neophema chrysogaster. This species suffers high juvenile mortality, but it is not clear why this is so. Given uncertainty about the best recovery strategy, we compare PVA scenarios that simulate various ways of utilizing captive-bred parrots to support the wild population in the context of unresolved threatening processes. Increasing the number of juveniles entering the population each year had the greatest benefit for population growth rate and size. Directly lowering juvenile mortality rates is difficult given uncertainty about the drivers of mortality in the wild. In lieu of this, releasing 100 juveniles from captivity to the wild population each autumn (either as a stand-alone action, or in combination with other interventions) was the most feasible and straightforward intervention of the options we tested. However, our PVAs also show that unless substantial and sustainable reductions can be made to juvenile mortality rates, Orange-bellied Parrots will remain dependent on intensive conservation management. This study highlights the utility of PVAs for answering practical questions about how to implement species conservation. PVAs provide a way to incorporate the best available information in a replicable modelling framework, and to identify impacts of parameter uncertainty on demographic trends.

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Effects of non-random juvenile mortality on small, inbred populations

Stojanović

Neeman

Lacy

et al. 2022

Biological Conservation

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Nestling growth and body condition of critically endangered Orange-bellied Parrots Neophema chrysogaster

Cited by 8 publications

References 31 publications

Evaluation of intervention aimed at improving reproductive success in Orange‐bellied Parrots Neophema chrysogaster: Lessons, barriers and successes

Evaluation of intervention aimed at improving reproductive success in Orange‐bellied Parrots Neophema chrysogaster: Lessons, barriers and successes

Conservation management in the context of unidentified and unmitigated threatening processes

Effects of non-random juvenile mortality on small, inbred populations

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