Life Expectancy, Causes of Death and Movements of the Grey-Headed Flying-Fox (<i>Pteropus poliocephalus</i>) Inferred from Banding

Tidemann, Christopher R.; Nelson, Jacob L.

doi:10.3161/150811011x624901

Cited by 19 publications

(18 citation statements)

References 38 publications

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“…For the eagle owl, Schaub et al . () have estimated this rate as 24%, and Tidemann & Nelson () have estimated it as 18·6% for the grey‐headed flying fox. In all these cases, such high mortality rates have a serious consequence on population viability as the population growth rate of these large‐sized species is especially sensitive to survival (Lebreton et al .…”

Section: Discussionmentioning

confidence: 99%

“…Mortality due to power lines has been argued to be a major cause of the short‐term decline of a large number of endangered avian species on both local and broad spatial scales (Leshem ; Ferrer, De La Riva & Castroviejo ; Real & Manosa ), as well as the cause of death of many bird species around the world (Bevanger & Brøseth, ; Bevanger ; Lehman, Kennedy & Savidge ). It has also been demonstrated as a threat for some bat species (Tidemann & Nelson ). In developing countries, where biodiversity is usually highest (Myers et al .…”

Section: Introductionmentioning

confidence: 99%

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Retrofitting of power lines effectively reduces mortality by electrocution in large birds: an example with the endangered Bonelli's eagle

Chevallier

Hernández‐Matías

Real

et al. 2015

Journal of Applied Ecology

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1. Mortality caused by power lines is a conservation problem for many vulnerable bird species. Many large species are especially threatened by electrocution as they frequently perch on pylons leading to electrocution that typically causes death. Electrocution mitigation measures have been implemented to protect several species; however, a resulting decrease in mortality due to these measures has not previously been demonstrated at the population scale. 2. In this study, we used data from a long-term capture-recapture programme (combining resightings of live birds and recovery of dead birds) carried out on the French population of the Bonelli's eagle Aquila fasciata from 1990 to 2009 to estimate the impact of the insulation of power lines on key demographic rates. 3. We found that the survival probability of all age classes increased after the insulation of dangerous power lines, due to a decrease in mortality caused by electrocution. This decrease was partially compensated for by an increase in other causes of death. 4. Our findings show that insulation of power lines has a strong positive impact on juveniles and immature birds and a lesser impact on adults. The overall increase in survival due to power line insulation led to a sharp increase in predicted population growth rates (from 0Á82 to 0Á98), although our findings still suggest that the population is not self-sustaining. Elasticity values indicate that adult survival is the key parameter in the population dynamics of this species, and since adult mortality caused by electrocution seemed close to zero, our ability to act on this parameter is limited. 5. This study demonstrates that insulation of power lines is relevant for the conservation of large bird species at a population scale as it allows the survival rate of all age classes to increase and thus in turn has a strong positive impact on population growth rates. 6. Synthesis and applications. We demonstrated that mortality rates induced by electrocution are considerable and have major consequences for the population viability of birds. We also demonstrated that electrocution mitigation measures can lead to a sharp increase in survival through reducing mortality from electrocution leading to improved population viability. In the light of these results, there is an urgent need that conservationists contact power line stakeholders not only to urge them to generalize retrofitting actions but also, in planning new infrastructure development, to plan for less harmful power lines, since this will be far less costly than developing a posteriori mitigation actions.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Retrofitting of power lines effectively reduces mortality by electrocution in large birds: an example with the endangered Bonelli's eagle

Chevallier

Hernández‐Matías

Real

et al. 2015

Journal of Applied Ecology

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“…Without regard to their importance within these ecosystems, these animals were legally culled historically due to their consumption of commercial fruits, nuisance (smell and noise) in urban environments, and fears of the emergence of the zoonotic pathogens they host, including Hendra and Lyssa viruses 35 . One species, the grey-headed ying fox (Pteropus poliocephalus),, is classi ed as 'Vulnerable' due to 30% population declines related to habitat loss and human disturbance 36,37,38 . Large res impact many animal and plant populations, but the responses of vulnerable and endangered populations are particularly critical to understand, especially for preserving biodiversity and maintaining ecosystem health and balance.…”

Section: Introductionmentioning

confidence: 99%

Quantifying the impact of severe bushfires on biodiversity to inform conservation

Baranowski

Faust

Eby

et al. 2020

Preprint

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The unusually severe 2019-2020 Australian bushfire season destroyed large areas of habitat along the southeastern coast. We assess the differences between this fire season and previous ones to understand their impacts and potential recovery. We used thermal satellite data to quantify the extent of eastern Australian bushfires from 2012-2020. During the 2019-2020 anomalous fire season, 134 mega-fires, each over 10,000 ha, burned 62.5% of the total affected area, including critical forested landscapes. Previous fire seasons were characterized by smaller, scattered fires in mostly non-forested areas. The anomalous fire season had direct negative impacts on wildlife including grey-headed flying foxes, which experienced substantial declines in immediately available foraging forest habitat, particularly key winter resources. We identified important areas for managing wildlife resources and supporting ecosystem health in the coming decades. Our research also identifies key monitoring areas to improve our understanding of ecosystem recovery and resilience in changing fire regimes.

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“…Combined with these short-range movements, long distance migrations driven by food availability have seen individual bats recorded with a north/south displacement of 1, 000 km over the study period (Roberts et al, 2012b). These long-range movements made by P. poliocephalus are essentially north-south, consistent with seasonal latitudinal migration (Roberts et al, 2012b, Tidemann andNelson, 2011).…”

Section: Ecology Of Australian Pteropid Bats With Specific Reference mentioning

confidence: 55%

“…The highest population densities of pteropid bats in Australia generally occur in the subtropics (Roberts et al, 2012a). In the northern parts of its range, P. poliocephalus co-roosts with P. alecto and even P. scapulatus (Tidemann and Nelson, 2011).…”

Section: Ecology Of Australian Pteropid Bats With Specific Reference mentioning

confidence: 99%

Risk factors for virus excretion from a bat colony: An observational study of grey-headed flying foxes (Pteropus poliocephalus) at Eastern Park, Geelong

Burroughs¹

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Life Expectancy, Causes of Death and Movements of the Grey-Headed Flying-Fox (Pteropus poliocephalus) Inferred from Banding

Cited by 19 publications

References 38 publications

Retrofitting of power lines effectively reduces mortality by electrocution in large birds: an example with the endangered Bonelli's eagle

Retrofitting of power lines effectively reduces mortality by electrocution in large birds: an example with the endangered Bonelli's eagle

Quantifying the impact of severe bushfires on biodiversity to inform conservation

Risk factors for virus excretion from a bat colony: An observational study of grey-headed flying foxes (Pteropus poliocephalus) at Eastern Park, Geelong

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