Recovery of North Island kākā (Nestor meridionalis septentrionalis) within Pureora Forest Park, 2000–2020

Greene, Terry; Thurley, Tertia; Basse, Britta

doi:10.20417/nzjecol.47.3511

Cited by 3 publications

(7 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Section: Catching and Radio Tagging Kākāmentioning

confidence: 99%

“…Mist-netting kākā has mostly been shown not to be gender selective and the sex ratio of birds caught can be used as an indicator of the status of a population (Greene & Fraser 1998;Wilson et al 1998). However, timing of capture can affect the sex ratio of birds caught (Greene & Fraser 1998). We explored the effect of timing of capture and predator control on the sex ratio of kākā we caught in mist nets using logistic generalised linear models (Appendix S1 in Supplementary Material).…”

Section: Catching and Radio Tagging Kākāmentioning

confidence: 99%

“…Several studies have shown that nesting kākā are particularly vulnerable to predation by stoats and (to a lesser extent) possums (Wilson et al 1998;Moorhouse et al 2003;Taylor et al 2009). Predation of nesting females has led to heavily skewed sex ratios of up to 6:1 of male:female adults in some kākā populations (Greene & Fraser 1998).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Conservation translocations of fauna in Aotearoa New Zealand: a review

Parker,

Ewen,

Innes

et al. 2023

NZJE

View full text Add to dashboard Cite

Kākā (Nestor meridionalis) are vulnerable to predation by stoats (Mustela erminea) and possums (Trichosurus vulpecula), particularly when nesting. Without predator control kākā populations decline. Control of stoats and possums both by trapping and aerial application of the poison 1080 leads to increased kākā nesting success. In recent years, many 1080 poison operations have been undertaken to control ship rat (Rattus rattus) and stoat plagues that occur after beech mast. Kākā do not breed every year but breed in anticipation of heavy fruiting. They do not usually breed during the spring and summers following beech mast when 1080 operations are often undertaken to control rat and stoat irruptions. Using radio-tags we measured the nesting success and survival of kākā for six years in South Westland during which there were beech (Nothofagaceae) and rimu (Dacrydium cupressinum) masts, stoat and rodent plagues, five 1080 operations, and four seasons in which kākā bred. We then simulated varying timings and frequencies of masting and 1080 use to explore the impact of masting and predator control on kākā population growth. In the absence of pest control simulated kākā populations declined. Aerial 1080 applied a year before or just before kākā breeding resulted in increased nesting success, but 1080 applied more than two years before kākā breeding had no impact. Aerially applied 1080 also increased adult kākā survivorship for at least 18 months. Annual 1080 operations or 1080 operations at intervals less than or equal to the time it takes stoat populations to recover resulted in the most rapid simulated kākā population growth. 1080 operations in (1) kākā breeding years, (2) when following mast, and (3) during rodent and stoat plagues each resulted in progressively smaller kākā population growth rates.

show abstract

Section: Catching and Radio Tagging Kākāmentioning

confidence: 99%

Section: Catching and Radio Tagging Kākāmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Conservation translocations of fauna in Aotearoa New Zealand: a review

Parker,

Ewen,

Innes

et al. 2023

NZJE

View full text Add to dashboard Cite

show abstract

“…We aimed to assess risk exposure using range distributions and dynamic space use in a reintroduced parrot population in a fenced conservation reserve, and to highlight the utility of both approaches. Kākā ( Nestor meridionalis ) are large‐brained, social parrots (Bond & Diamond, 2004; Iwaniuk et al, 2005) that are considered generalist, extractive foragers (Beggs & Wilson, 1987; Moorhouse, 1997). These traits suggest a propensity for exploration and innovation (Dunbar & Shultz, 2007; Sol et al, 2005), which has been observed particularly in juvenile kākā (Bond & Diamond, 2004; Loepelt et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Home range and dynamic space use reveals age‐related differences in risk exposure for reintroduced parrots

Forrest,

Rodríguez‐Recio,

Seddon

2024

Conservat Sci and Prac

View full text Add to dashboard Cite

Individual‐level differences in animal spatial behavior can lead to differential exposure to risk. We assessed the risk‐exposure of a reintroduced population of kākā (Nestor meridionalis) in a fenced reserve in New Zealand by GPS tracking 10 individuals and comparing the proportion of each individual's home range beyond the reserve's fence in relation to age, sex, and fledging origin. To estimate dynamic space use, we used a sweeping window framework to estimate occurrence distributions (ODs) from temporally overlapping snapshots. For each OD, we calculated the proportion outside the reserve's fence to assess temporal risk exposure, and the area, centroid, and overlap to represent the behavioral pattern of space use. Home range area declined significantly and consistently with age, and the space use of juvenile kākā was more dynamic, particularly in relation to locational changes of space use. The wider‐ranging and more dynamic behavior of younger kākā resulted in more time spent outside the reserve, which aligned with a higher number of incidental mortality observations. Quantifying both home range and dynamic space use is an effective approach to assess risk exposure, which can provide guidance for management interventions. We also emphasize the dynamic space use approach, which is flexible and can provide insights into a species' spatial ecology.

show abstract

“…We aimed to assess risk exposure using range distributions and dynamic space use in a reintroduced parrot population in a fenced conservation reserve, and to highlight the utility of both approaches. Kākā (Nestor meridionalis) are large-brained, social parrots (Bond & Diamond, 2004;Iwaniuk et al, 2005) that are considered generalist, extractive foragers (Beggs & Wilson, 1987;Moorhouse, 1997). These traits suggest a propensity for exploration and innovation (Dunbar & Shultz, 2007;Sol et al, 2005), which has been observed particularly in juvenile kākā (Bond & Diamond, 2004;Loepelt et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Home range and dynamic space use reveals age-related differences in risk exposure for reintroduced parrots

Forrest

Recio

Seddon

2022

Preprint

View full text Add to dashboard Cite

Individual-level differences in animal spatial behaviour have been identified in numerous species, which can lead to differential exposure to risk for different groups, particularly for reintroduced species in fragmented landscapes. To assess the risk-exposure of a population of kākā (Nestor meridionalis) reintroduced into a fenced reserve, we GPS-tracked 10 individuals and estimated their home ranges and temporal space use variability (SUV). We compared home range area (within 95% contour of utilisation distribution - UD95) between individuals in relation to age, sex, and fledging origin, and assessed risk exposure by calculating the proportion of each individual's home range beyond the reserve's fence. To estimate temporal variability within each individual's space use, we used a sweeping window framework to estimate occurrence distributions of temporally overlapping snapshots of the movement trajectory. For each occurrence distribution, we calculated the proportion outside the reserve's fence to assess how risk exposure changed throughout time, and the UD95area and UD95centroid to assess the behavioural pattern of space use. Home range area declined significantly and consistently with age (up to 27-fold differences), and the space use of juvenile kākā was more temporally dynamic, particularly in relation to drift of the UD95centroid. The wider-ranging behaviour of younger kākā resulted in more time spent outside the reserve, which aligned with a higher number of incidental mortality observations of younger individuals. Quantifying both the home range and space use variability of populations that may encounter spatially dependent threats is an effective approach to assess risk exposure, which can provide guidance for management interventions. We also emphasise the temporal space use variability approach, which is a flexible approach that can provide numerous insights and has not been widely adopted in the literature. We provide code and data such that all the analyses in this study can be reproduced.

show abstract

Recovery of North Island kākā (Nestor meridionalis septentrionalis) within Pureora Forest Park, 2000–2020

Cited by 3 publications

References 15 publications

Conservation translocations of fauna in Aotearoa New Zealand: a review

Conservation translocations of fauna in Aotearoa New Zealand: a review

Home range and dynamic space use reveals age‐related differences in risk exposure for reintroduced parrots

Home range and dynamic space use reveals age-related differences in risk exposure for reintroduced parrots

Contact Info

Product

Resources

About