population trends

1-20 of 370 Search Results for

Sort by

Sort Order Select

Journal Articles

Trends in woodland bird populations on the Cumberland Plain, New South Wales, from long-term datasets

A.S.J. Saunders

Australian Zoologist (2018) 39 (4): 675–697.

https://doi.org/10.7882/AZ.2018.041

Published: 01 December 2018

... to prey upon the nestlings of small woodland birds (Wood 1998; Higgins et al. 2006). In addition, the Pied Currawong also feeds on the fruit of many weed species and helps disperse Trends in woodland bird populations on the Cumberland Plain, New South Wales, from long-term datasets A.S.J. Saunders...

View article titled, Trends in woodland bird populations on the Cumberland Plain, New South Wales, from long-term datasets

Journal Articles

Repeatability of aerial surveys

A. R. Pople

Australian Zoologist (2014) 31 (1): 280–286.

https://doi.org/10.7882/AZ.1999.028

Published: 17 March 2014

...A. R. Pople In order to monitor population trends through space and time, aerial surveys need to provide density estimates that are a constant proportion of the true population density and are therefore repeatable. Previous work has identified factors that affect the visibility of kangaroos from...

View article titled, Repeatability of aerial surveys

Journal Articles

Using wildlife rehabilitator surveys to identify threats: a case study of koalas in Victoria, Australia

K. R. Ashman, D. J. Watchorn, D. A. Whisson

Australian Zoologist (2021) 42 (1): 130–145.

https://doi.org/10.7882/AZ.2021.027

Published: 18 August 2021

... to identify (i) threats faced by the koala across Victoria and (ii) their perceptions on koala population trends and potential threat mitigation actions. Wildlife rehabilitators identified habitat loss, fragmentation, and degradation as the biggest threat to koalas, while vehicle collisions, heatwaves...

View article titled, Using wildlife rehabilitator surveys to identify threats: a case study of koalas in Victoria, Australia

Journal Articles

An overview of the Queensland macropod monitoring programme

G. Lundie-Jenkins, D. W. Hoolihan, G. W. Maag

Australian Zoologist (2014) 31 (1): 301–305.

https://doi.org/10.7882/AZ.1999.031

Published: 17 March 2014

... harvest represents the major portion of the national total, ranging from 55 to 68% for the period 1984 to 1992. Since the introduction of quotas in 1975, systems have been in place to monitor population trends, the size and distribution of both the commercial and non-commercial harvest, non-harvest...

View article titled, An overview of the Queensland macropod monitoring programme

Journal Articles

Distribution, habitat and conservation status of the Green and Golden Bell Frog Litoria aurea (Lesson 1829) (Anura: Hylidae) in Victoria

Graeme Gillespie

Australian Zoologist (2014) 30 (2): 199–207.

https://doi.org/10.7882/AZ.1996.012

Published: 17 March 2014

... differences in population trends between New South Wales and Victoria are discussed. Brook, A. J., 1982. Atlas of Frogs of Victoria. Dept. Zool. Univ. Melb. Publ. No. 6. Brown, G. W., Carr, K. A., Cherry, K. A., Craig, S. A., Horrocks, C. F. B., Menkhorst, K. A., Opie, A. M. and Triggs, B. E...

View article titled, Distribution, habitat and conservation status of the Green and Golden Bell Frog Litoria aurea (Lesson 1829) (Anura: Hylidae) in Victoria

Journal Articles

The conservation status of the Spectacled Flying Fox Pteropus conspicillatus in Australia

Stephen Garnett, Olivia Whybird, Hugh Spencer

Australian Zoologist (2014) 31 (1): 38–54.

https://doi.org/10.7882/AZ.1999.006

Published: 17 March 2014

... be the development of non-lethal deterrence at orchards followed by the development of methods for countering tick paralysis. Further annual censuses will be necessary to monitor population trends in comparison with me current baseline. This initial census was conducted as part of an integrated approach...

View article titled, The conservation status of the Spectacled Flying Fox Pteropus conspicillatus in Australia

Journal Articles

Long-term monitoring of an endangered population of Yellow-bellied Glider Petaurus australis on the Bago Plateau, New South Wales, and its response to wildfires and timber harvesting in a changing climate

Rohan J. Bilney, Peter J. Kambouris, Jess Peterie, Craig Dunne, Kelly Makeham ...

Australian Zoologist (2022) 42 (2): 592–607.

https://doi.org/10.7882/AZ.2022.035

Published: 31 August 2022

... was generally below average (on average, 11% below long-term average), however extreme drought was restricted to just one year (2006). With concern for the long-term declining population trends for numerous marsupial species, including arboreal species (Lindenmayer et al. 2011; Smith and Smith 2018; Wagner et...

View article titled, Long-term monitoring of an endangered population of Yellow-bellied Glider Petaurus australis on the Bago Plateau, New South Wales, and its response to wildfires and timber harvesting in a changing climate

Journal Articles

How to count kangaroos

H. I. McCallum

Australian Zoologist (2014) 31 (1): 309–316.

https://doi.org/10.7882/AZ.1999.033

Published: 17 March 2014

...H. I. McCallum The fundamental reason for counting kangaroos is to ensure that harvests are demonstrably sustainable. Given this goal, it is essential that the survey method should be able to detect broad scale trends in population size. Aerial counts will detect trends only if the constant...

View article titled, How to count kangaroos

Journal Articles

Aerial survey of kangaroos in South Australia 1978-1998: a brief report focusing on methodology

G. C. Grigg, L. A. Beard, P. Alexander, A. R. Pople, S. C. Cairns

Australian Zoologist (2014) 31 (1): 292–300.

https://doi.org/10.7882/AZ.1999.030

Published: 17 March 2014

... The results have nlghliphtea the responsive- ness of kangaroo populations to ra~nfall and pasture availability There has been a statistically significant long.term trend towaras nigher n~mbers of western grey kangaroas in tne stday area. and a similar trend ;n reas slnce the end ol the 198211983 drought. Over...

View article titled, Aerial survey of kangaroos in South Australia 1978-1998: a brief report focusing on methodology

Book Chapter

Why are taxonomists often regarded as second class citizens? a misclassification that threatens the basic infrastructure of biodiversity

By Pat Hutchings

Book: Grumpy Scientists: The Ecological Conscience of a Nation

Series: Other RZS NSW Publications

Publisher: Royal Zoological Society of New South Wales

Published: 01 January 2013

10.7882/FS.2013.009

EISBN: 978-0-9874309-1-5

... Systematics is fundamental to biology, one must know what one is studying, otherwise how can they be conserved. A discussion is provided on the declining systematic base here in Australia. This is because as the population of Australian systematists ages and becomes grey they are not being...

Open the PDF for Why are taxonomists often regarded as second class citizens? a misclassification that threatens the basic infrastructure of biodiversity in another window

Journal Articles

Using Passive Acoustic Recording and Automated Call Identification to Survey Koalas in the Southern Forests of New South Wales

B. Law, L. Gonsalves, R. Bilney, J. Peterie, R. Pietsch ...

Australian Zoologist (2020) 40 (3): 477–486.

https://doi.org/10.7882/AZ.2019.033

Published: 01 May 2020

..., for collecting much needed long-term data to assess trends in occupancy or other population attributes over time. © 2020 Royal Zoological Society of New South Wales 2020 Wildlife surveys monitoring detectability Song Meters bellows 2020 477 Theme edition: New Approaches to Zoology Australian...

View article titled, Using Passive Acoustic Recording and Automated Call Identification to Survey Koalas in the Southern Forests of New South Wales

Book Chapter

Parrots of the Sydney region: population changes over 100 years

By Shelley Burgin, Tony Saunders

Book: Pest or Guest: The Zoology of Overabundance

Series: Other RZS NSW Publications

Publisher: Royal Zoological Society of New South Wales

Published: 01 January 2007

10.7882/FS.2007.023

EISBN: 978-0-9803272-1-2

... their generally striking colours, strident call and large body size, the status of parrot populations in urban regions have been largely ignored. We reviewed three bird data bases to determine trends. The two species, recorded within 10 km of Sydney's General Post Office pre-1900, are no longer present, although...

Open the PDF for Parrots of the Sydney region: population changes over 100 years in another window

Journal Articles

Trends in the rescue and fate of koalas in New South Wales (1973-2020), with a focus on disease and trauma

Daniel Lunney, Holly Cope, Joanna Griffith, Corinna Orcheg, Jessica Bryant ...

Australian Zoologist (2023)

https://doi.org/10.7882/AZ.2023.026

Published: 07 September 2023

... disease and trauma to koala populations from rehabilitation records alone, we can use the trends in admissions to inform the efficient distribution of resources to rescue and rehabilitation efforts. Corresponding author: Dan.Lunney@environment.nsw.gov.au dogs chlamydia motor vehicle collisions...

View article titled, Trends in the rescue and fate of koalas in New South Wales (1973-2020), with a focus on disease and trauma

Journal Articles

After the 2010 rains: changes in reporting rates of birds in remnant woodland vegetation in the central wheatbelt of New South Wales, Australia, from drought to post-drought

Murray Ellis, Jennifer Taylor

Australian Zoologist (2014) 37 (1): 29–39.

https://doi.org/10.7882/AZ.2014.007

Published: 02 June 2014

... and Vestjens 1989, 1990). Reduced abundance of these resources affects the abundances of woodland birds in Australia (Recher et al. 1996) and has negative impacts on birds in semi-arid North America (Albright 2010). Indeed, the meta-analysis by Mac Nally et al. (2009) of population trends in birds from...

View article titled, After the 2010 rains: changes in reporting rates of birds in remnant woodland vegetation in the central wheatbelt of New South Wales, Australia, from drought to post-drought

Journal Articles

Frog Reproduction and Community Structure in relation to Water Attributes: Setting the stage to understand effects of Climatic Variables and Climate Change

Graham H. Pyke, Arthur W. White

Australian Zoologist (2021) 42 (3): 667–689.

https://doi.org/10.7882/AZ.2021.032

Published: 22 October 2021

...Graham H. Pyke; Arthur W. White ABSTRACT As amphibians have declined more than other vertebrates and are important environmental bio-indicators for aquatic ecosystems, we must understand how attributes of such ecosystems affect individual frogs, populations, and multi-species communities...

View article titled, Frog Reproduction and Community Structure in relation to Water Attributes: Setting the stage to understand effects of Climatic Variables and Climate Change

Journal Articles

Monitoring within-patch, flying season population dynamics of an endangered mire-dwelling dragonfly, Petalura gigantea (Odonata: Petaluridae)

Ian R. C. Baird, Shelley Burgin

Australian Zoologist (2023)

https://doi.org/10.7882/AZ.2023.038

Published: 13 November 2023

... of the replicated, modified Pollard Walk for monitoring changing relative abundance of male imagos across the duration of a flying season, and potentially, for comparison among years, for a longitudinal, landscape-scale population study. With the observed trends in changing relative abundance of male imagos around...

View article titled, Monitoring within-patch, flying season population dynamics of an endangered mire-dwelling dragonfly, Petalura gigantea (Odonata: Petaluridae)

Journal Articles

How Much Long-Term Data Are Required to Effectively Manage A Wide-Spread Freshwater Turtle?

R-J Spencer

Australian Zoologist (2018) 39 (4): 568–575.

https://doi.org/10.7882/AZ.2018.017

Published: 01 December 2018

...R-J Spencer ABSTRACT Freshwater turtle populations are globally threatened by many factors. Complicating matters, their longevity requires long-term monitoring on the scale of decades to assess changes in population size, yet few long-term studies exist. Documenting population estimates and trends...

View article titled, How Much Long-Term Data Are Required to Effectively Manage A Wide-Spread Freshwater Turtle?

Book Chapter

Review of the distribution and status of the bat fauna of New South Wales and the Australian Capital Territory

By Michael Pennay, Bradley Law, Daniel Lunney

Book: The Biology and Conservation of Australasian Bats

Series: Other RZS NSW Publications

Publisher: Royal Zoological Society of New South Wales

Published: 01 January 2011

10.7882/FS.2011.025

EISBN: 978-0-9803272-4-3

..., identifying trends in species and populations is almost impossible. The status of most bats will remain threatened without action to ameliorate threats and monitor changes in population sizes and their distribution. ...

Open the PDF for Review of the distribution and status of the bat fauna of New South Wales and the Australian Capital Territory in another window

Journal Articles

Collect, connect, upscale: Towards coordinated monitoring of migratory shorebirds in the Asia-Pacific

Richard A. Fuller, Micha V. Jackson, Tatsuya Amano, Chi-Yeung Choi, Robert S. Clemens ...

Australian Zoologist (2020) 41 (2): 205–213.

https://doi.org/10.7882/AZ.2020.027

Published: 30 September 2020

.../science/status-and-trends). Nonetheless, while comprehensive monitoring of bird populations is relatively tractable in regions with a high density of volunteer birdwatchers (e.g. breeding bird surveys in the USA and UK; Sauer et al. 2017, Harris et al. 2018), achieving effective monitoring in much...

View article titled, Collect, connect, upscale: Towards coordinated monitoring of migratory shorebirds in the Asia-Pacific

Journal Articles

Monitoring the Green and Golden Bell Frog: current problems and an alternative approach

Trent Penman, Frank Lemckert

Australian Zoologist (2011) 34 (3): 373–378.

https://doi.org/10.7882/AZ.2008.014

Published: 14 October 2011

... this option, comparing it to traditional approaches, and consider that monitoring site occupancy should be time-effective and statistically more sensitive in detecting annual trends in populations. We recommend testing this approach further with a suitable data set to better determine whether Site Occupancy...

View article titled, Monitoring the Green and Golden Bell Frog: current problems and an alternative approach

population trends

This Feature Is Available To Subscribers Only