1-20 of 843 Search Results for

Population numbers

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Book Chapter
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
... 15 species are now known from this area. Populations of the five most common of these species have continued to increase in the last 20 years, one appears to have remained unchanged and others are present in insufficient numbers to comment. No species appears to have declined in numbers. Escapees...
Book Chapter
Series: Other RZS NSW Publications
Publisher: Royal Zoological Society of New South Wales
Published: 01 January 2008
10.7882/FS.2008.012
EISBN: 978-0-9803272-2-9
... The management history of the Koala Phascolarctos cinereus in Victoria is unique and spectacular. Management of Koala populations began in Victoria in about 1910, at which time the species was undergoing a severe decline in population number and distribution. The fortuitous transfer of small...
Book Chapter
Series: Other RZS NSW Publications
Publisher: Royal Zoological Society of New South Wales
Published: 01 January 2004
10.7882/FS.2004.091
EISBN: 978-0-9586085-7-2
... waste management practices and the community's “need to feed” friendly birds. Ibis have established viable colonies in urban areas with population numbers in the thousands. The Australian White Ibis Threskiornis molucca population in metropolitan Sydney has increased considerably over the past 15...
Journal Articles
Australian Zoologist (2014) 30 (2): 177–189.
Published: 17 March 2014
...Arthur White; Graham Pyke The Green and Golden Bell Frog Litoria aurea has undergone a dramatic population decline in New South Wales. During this time the species' status in this state has changed from being common in the 1960s to endangered in 1992. To assess the present population numbers...
Journal Articles
Australian Zoologist (2019) 40 (1): 75–91.
Published: 01 January 2019
... of endemic terrestrial birds on the island, with the species now functioning as the top apex predator there and possibly limiting population numbers of Rattus rattus . If Tyto novaehollandiae is exerting mesopredator control, this cautions the removal of its population, as required to prevent it switching...
Book Chapter
Series: Other RZS NSW Publications
Publisher: Royal Zoological Society of New South Wales
Published: 01 January 2011
10.7882/FS.2011.023
EISBN: 978-0-9803272-4-3
... ( Siphonaptera, Ischnopsyllidae ) or bat flies (Diptera, Nycteribiidae) in winter-spring season only 35-40 bats should be examined. In summer, with many young animals in populations, the number of examinations should be increased up to 50-55. Similar results are obtained for the Infestation Index. Examination...
Book Chapter
Series: Other RZS NSW Publications
Publisher: Royal Zoological Society of New South Wales
Published: 01 January 2002
10.7882/FS.2002.042
EISBN: 978-0-9586085-4-1
... Many fruit growers see flying-foxes such as the Grey-headed Flying-fox as a threat to their livelihood. Understandably, when large numbers of the animals suddenly enter orchards and cause significant damage, growers start to talk of “population explosions” of the animals. In this paper we...
Book Chapter
Series: Other RZS NSW Publications
Publisher: Royal Zoological Society of New South Wales
Published: 01 January 2007
10.7882/FS.2007.004
EISBN: 978-0-9803272-1-2
... In Australia, the introduced house mouse, Mus domesticus , causes obvious and severe agricultural damage, particularly during mouse plagues where population densities may exceed 1,000 mice/ha. The aim of any pest control is to reduce the damage caused by the pest, not to reduce pest numbers...
Book Chapter
Series: Other RZS NSW Publications
Publisher: Royal Zoological Society of New South Wales
Published: 01 January 2010
10.7882/FS.2010.029
EISBN: 978-0-9803272-3-6
... construction of the Georges River Parkway and increasing urbanisation. Retaining a connection to other koala populations to the south is also important to conserving Campbelltown koalas. State Environmental Planning Policy Number 44 i.e. SEPP 44 (Koala Habitat Protection) requires two independent data sources...
Book Chapter
Series: Other RZS NSW Publications
Publisher: Royal Zoological Society of New South Wales
Published: 01 January 2004
10.7882/FS.2004.090
EISBN: 978-0-9586085-7-2
... The Large Bent-wing Bat Miniopterus schreibersii has often been perceived as a native species thriving in our rapidly expanding urban landscape. We used a number of historical and current data sets to assess whether this perception is supported by direct evidence. Investigation of museum...
Book Chapter
Series: Other RZS NSW Publications
Publisher: Royal Zoological Society of New South Wales
Published: 01 January 2007
10.7882/FS.2007.019
EISBN: 978-0-9803272-1-2
... Dramatic changes to Victorian landscapes and faunal assemblages followed the arrival of Europeans. Many species of birds and mammals declined or disappeared from large parts of their former ranges. Conversely, these ecological changes provided opportunities for a small number of species...
Book Chapter
Series: Other RZS NSW Publications
Publisher: Royal Zoological Society of New South Wales
Published: 01 January 2007
10.7882/FS.2007.016
EISBN: 978-0-9803272-1-2
... Five claims about Eastern Grey Kangaroos Macropus giganteus , or their management, are tested with evidence. Most of the evidence is drawn from three populations of M. giganteus located on reserved land in or near the ACT, which have the highest measured densities of any kangaroo populations...
Book Chapter
Series: Other RZS NSW Publications
Publisher: Royal Zoological Society of New South Wales
Published: 01 January 2004
10.7882/FS.2004.092
EISBN: 978-0-9586085-7-2
... The Silver Gull population in the Greater Melbourne Area has expanded dramatically in response to the availability of abundant anthropogenic foods. The activities of large numbers of gulls lead to a range of conflicts with human interests. These conflicts and examples of their economic costs...
Journal Articles
Australian Zoologist (2022) 42 (2): 256–277.
Published: 09 May 2022
... in February 1980, while the second nearby site was unburnt and served as a control. Relative numbers and survival of the Agile Antechinus ( Antechinus agilis ) and Mainland Dusky Antechinus ( A. mimetes ) declined post-fire and remained lower than in the control site until spring 1980 when populations at both...
Book Chapter
Series: Other RZS NSW Publications
Publisher: Royal Zoological Society of New South Wales
Published: 01 January 2012
10.7882/FS.2012.022
EISBN: 978-0-9803272-6-7
... have been identified in the NSW 2008 Koala Recovery Plan , the 2010 NSW Priorities for biodiversity adaptation to climate change and the 2009-14 National Koala Conservation and Management Strategy. The statements in the formal strategies and recovery plans identify a number of problems, two...
Book Chapter
Series: Other RZS NSW Publications
Publisher: Royal Zoological Society of New South Wales
Published: 01 January 2004
10.7882/FS.2004.095
EISBN: 978-0-9586085-7-2
... development. As a consequence, Fallow, Red, Sambar, Chital, Rusa and Hog deer have formed wild populations in many habitats, ranging from arid woodland to rainforest. The alarming increase in the number of wild deer over the last three decades, and the continued expansion of Australia's urban areas, has seen...
Book Chapter
Series: Other RZS NSW Publications
Publisher: Royal Zoological Society of New South Wales
Published: 01 January 1993
10.7882/RZSNSW.1993.031
EISBN: 0-9599951-8-8
... This paper reviews the factors involved in the decline, both inter- and intra-specific, of Australian frogs from both disturbed and apparently pristine habitats. Despite a lack of published accounts and an absence of long term population studies, a variety of causes were identified. Habitat...
Book Chapter
Series: Other RZS NSW Publications
Publisher: Royal Zoological Society of New South Wales
Published: 01 January 2008
10.7882/FS.2008.006
EISBN: 978-0-9803272-2-9
... their survival on the mainland, subsequently increasing greatly in numbers. By the 1990s, large concentrated populations of Koalas had caused extensive tree deaths and resulting environmental damage, with associated economic and animal welfare issues. This study aimed to discover why and how the management...
Book Chapter
Series: Other RZS NSW Publications
Publisher: Royal Zoological Society of New South Wales
Published: 01 January 1999
10.7882/RZSNSW.1999.008
EISBN: 0-9586085-1-2
... of species per tree were not normally distributed and that this was best corrected by using log transformed data. It was found that 20 replicates were needed to detect a 23% change in the observed number of species per tree in the study population. The estimation of the ɑ diversity index and the Chao 1...
Book Chapter
Series: Other RZS NSW Publications
Publisher: Royal Zoological Society of New South Wales
Published: 01 January 2012
10.7882/FS.2012.017
EISBN: 978-0-9803272-6-7
... surveillance programs and developing treatment or management options. Reproductive technologies, validated in zoos, can provide value added census data to inform on population viability and function as well as numbers. Determining species preferences and tolerance limits will also inform the triggers...