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Wildlife Research Wildlife Research Society
Ecology, management and conservation in natural and modified habitats
Wildlife Research

Wildlife Research

Volume 50 Number 10 2023

WR22037Spatially structured brown-headed cowbird control measures and their effects on Kirtland’s warbler long-term population sustainability

Eric L. Margenau 0000-0003-2978-4243, Nathan W. Cooper, Donald J. Brown, Deahn M. Donner, Peter P. Marra and Pat Ryan
pp. 771-781
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Brood parasitism can strongly impact songbird productivity and was a major factor resulting in the historical decline of the Kirtland’s warbler. We found contemporary cowbird brood parasitism rates were around 1.5% within the primary breeding area of the Kirtland’s warbler, the species can withstand a reduction in productivity of 13–18% before declining, and high parasitism rates in the peripheral breeding area are sustainable long-term if cowbird removal occurs in the core breeding area. Our study provides parasitism thresholds to assist with development of management strategies to ensure long-term viability of this conservation-reliant species. Photograph by Nathan W. Cooper.

WR21176Set free: an evaluation of two break-away mechanisms for tracking collars

Leticia F. Povh 0000-0003-0306-0191, Nicole Willers and Patricia A. Fleming 0000-0002-0626-3851
pp. 782-791
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The ethical and welfare challenges with radio tracking animals is ensuring that the device is removed from the animal at the conclusion of the study. We tested two types of collar break-away mechanisms, designed to release the collars over time. One is Cotton Thread weak-link and a second Timed Release Device. For both break-away types, the release timing was unpredictable, and poor collar recovery rates show the importance in adding camera traps to monitor collared animals. Photograph by Leticia F. Povh.

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Reptiles are vulnerable to habitat loss and fragmentation, yet the influence of landscape structure on species distributions is unknown. In this study we modelled the distributions of 40 reptile species in Victoria, Australia, and found that the cover and spatial configuration of native vegetation influence the distribution of most species. Knowledge of how landscape structure influences species’ distributions will help to improve biodiversity management in fragmented landscapes. Photograph by S. J. Mulhall.

WR22070Evaluation of oral baits and distribution methods for Tasmanian devils (Sarcophilus harrisii)

Sean Dempsey, Ruth J. Pye 0000-0002-1001-3329, Amy T. Gilbert, Nicholas M. Fountain-Jones, Jennifer M. Moffat 0000-0001-6236-5943, Sarah Benson-Amram, Timothy J. Smyser and Andrew S. Flies 0000-0002-4550-1859
pp. 807-819
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This study aimed to test oral baits as potential vaccine-delivery vehicles for Tasmanian devils. Captive and wild devils consumed placebo versions of commercial baits used on mainland Australia. Abundant non-target species, such as brushtail possums, Tasmanian pademelons, and eastern quolls consumed most baits in the wild. Implementation of automated bait dispensers increased bait uptake by devils to over 50% at the same regional field sites. Photograph by Jennifer M. Moffat.

WR22018Implications of habitat overlap between giant panda and sambar for sympatric multi-species conservation

Wenke Bai 0000-0001-9334-4758, Jindong Zhang, Ke He, Shanshan Zhao, Xiaodong Gu, Jie Hu, Melissa Songer, Caiquan Zhou, Xin Dong and Qiongyu Huang
pp. 820-826
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We analysed overlap in the habitat area and habitat suitability between giant panda (Ailuropoda melanoleuca) and sambar (Rusa unicolor) to examine potential sympatric species competition. The results indicate that the similarity of habitat requirements between the two species is high. In addition, the competition for space use among populations of the two species could intensify as the sambar population increases. Niche overlap and interspecific competition between sympatric species should be a stronger focus in endangered species conservation. We suggest strengthening the habitat restoration and establishment of corridors for all key species to alleviate the increased competition associated with niche overlap among sympatric species. Photograph by camera trap.

WR21148Bird community structure and habitat association in Owabi Wildlife Sanctuary, Ashanti Region (Ghana)

Collins Ayine Nsor 0000-0002-9516-7422, Nana Afua Ankomah Dei, John Mensah Nkrumah, Rockson Acolatse and Emmanuel Danquah
pp. 827-839
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Global bird population decline has led to renewed interest in bird–habitat selection studies. This study, which aimed at assessing bird habitat preference, found the farmlands and built-up as the most preferred habitats, whereas the open water was the least preferred. The forest reserve was the most diverse, owing to food availability and less disturbance. The findings highlighted the need to incorporate habitat demographic information into conservation planning and management. Photograph by Rockson Acolatse.

WR22136Understanding the zoonotic pathogen, Coxiella burnetii in Australian fur seal breeding colonies through environmental DNA and genotyping

Brett R. Gardner 0000-0003-2968-1850, John P. Y. Arnould, Jasmin Hufschmid, Rebecca R. McIntosh, Aymeric Fromant 0000-0002-3024-7659, Mythili Tadepalli and John Stenos
pp. 840-848
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Infectious diseases such as Q-fever (Coxiella) often contribute to reproductive failure in terrestrial mammals. We investigated whether this pathogen could be detected in the environment and in Australian fur seal placentas by using molecular techniques. Our results indicated that Coxiella burnetii is present in two of the largest breeding colonies and that environmental DNA can be used to survey for infected colonies. Photograph by Hanna Geeson.

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Avian assemblages were surveyed using a transect-point method before and after aerial applications of an organophosphorous insecticide, fenitrothion, for locust control. No pesticide-related differences in assemblages were detected between sprayed and unsprayed sites using multi-dimensional scaling (MDS) and permutational multivariate analysis of variance (PERMANOVA) analysis techniques. Although sublethal impacts on individuals have been identified in previous research, landscape-level changes in Australian avian assemblages resulting from single fenitrothion applications appear unlikely, provided spraying protocols remain unchanged. Photograph by Wim C. Mullié.

WR21172Reducing koala roadkill: a social marketing formative study

Bo Pang 0000-0003-3227-3612, Anran Zhang, Tori Seydel, Patricia David 0000-0001-6655-2500, Murooj Yousef and Sharyn Rundle-Thiele
pp. 858-868
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A key threat to koalas in some parts of their home range is vehicle strikes. Understanding what may encourage people to be more vigilant and drive slowly in areas with significant numbers of koalas is an important research undertaking. This paper identifies values-based segments that influence the intention to slow down significantly; and demonstrates the necessity of using segmentation to guide conservation program planning to decrease driving speed. Photograph by https://unsplash.com/s/photos/koala.

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