1-20 of 571 Search Results for

Population decline

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
Journal Articles
Journal Articles
Australian Zoologist (2014) 26 (3-4): 109–129.
Published: 17 March 2014
...Peter Smith; Judy Smith The Koala population in Warringah Shire has declined over the last 50 years with increasing urbanization. Koalas were reported from various localities throughout the Shire in the 1940's, 1950's and 1960's. They now occur only at Barrenjoey Peninsula. Ku-ring-gai Chase...
Journal Articles
Book Chapter
Series: Other RZS NSW Publications
Publisher: Royal Zoological Society of New South Wales
Published: 01 January 1999
10.7882/RZSNSW.1999.064
EISBN: 0-9586085-1-2
... to determine the status, conservation priorities, ecological requirements of the butterfly, and to identify factors contributing to its population decline. Habitat loss appears to be the main factor contributing to population decline. Management of the population will focus on maintaining food plant...
Journal Articles
Australian Zoologist (2014) 33 (1): 69–99.
Published: 17 March 2014
... populations, P. cinereus populations then had many more episodes of high mortality, population size appears markedly more volatile and overall abundance was much higher. Southern Queensland populations declined greatly at the time of the harvests, but the central Queensland population expanded after the last...
Journal Articles
Book Chapter
Series: Other RZS NSW Publications
Publisher: Royal Zoological Society of New South Wales
Published: 01 January 2004
10.7882/FS.2004.020
EISBN: 978-0-9586085-8-9
...-100 km in search of food within the Mt Lofty region. The habitats that provide floral nectar during late summer and autumn, the gum and box woodlands, however, have been disproportionately cleared and honeyeater populations decline during these times. As a consequence, honeyeaters are unable...
Journal Articles
Journal Articles
Book Chapter
Series: Other RZS NSW Publications
Publisher: Royal Zoological Society of New South Wales
Published: 01 January 1993
10.7882/RZSNSW.1993.008
EISBN: 0-9599951-8-8
..., are distinctive at higher taxonomic levels. In this paper, the conservation priorities of several species of concern are assessed against criteria of rarity, distinctiveness, intrinsic vulnerability to population decline, and the level of threat currently faced. In many cases, far too little is known...
Journal Articles
Australian Zoologist (2014) 30 (2): 150–157.
Published: 17 March 2014
...T. F. van de Mortel; W. A. Buttemer Global declines in amphibian populations in often pristine habitats have led to suggestions that a ubiquitous agent might be involved, such as increased Ultraviolet-B (280-320 nm) radiation due to ozone depletion. The Green and Golden Bell Frog Litoria aurea...
Journal Articles
Australian Zoologist (2017) 38 (4): 518–536.
Published: 01 September 2017
... of anthropogenic factors, including hunting for the fur trade, resulted in widespread population declines for the koala. In Victoria, the situation was extreme. Currently, many koala populations in Victoria are derived from only a few individuals which existed less than 120 years ago. These populations therefore...
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
Journal Articles
Australian Zoologist (2011) 35 (2): 307–314.
Published: 14 October 2011
...Hamish McCallum; Menna Jones As the largest surviving marsupial carnivore, the Tasmanian devil is an iconic species. A disfiguring and invariably fatal facial cancer, first reported in 1996, has now spread across most of the range of the devil, leading to population declines of up to 90...
Journal Articles
Australian Zoologist (2011) 34 (3): 426–437.
Published: 14 October 2011
...Sharada Ramamurthy; Graeme Coulson The Growling Grass Frog Litoria raniformis has undergone population declines throughout its range over the past 20 years and is listed as a threatened species both in Victoria and nationally. The species was last recorded in 1979 in the area now occupied...
Journal Articles
Australian Zoologist (2011) 35 (2): 189–197.
Published: 14 October 2011
... to be more of a generalist in its reproductive requirements. These differences afforded an opportunity to explore how a species' behavioural and ecological traits may provide resilience to population declines due to climate or habitat alterations. Amphibian Mixophyes endangered breeding ecology...
Book Chapter
Series: Other RZS NSW Publications
Publisher: Royal Zoological Society of New South Wales
Published: 01 January 1993
10.7882/RZSNSW.1993.044
EISBN: 0-9599951-8-8
... In Queensland since 1978, seven species of frogs have disappeared and populations of another four have seriously declined. All the declines have occurred in upland rainforest and all the species live along or breed in streams. We ask the question “what is wrong with upland rainforest streams...
Book Chapter
Series: Other RZS NSW Publications
Publisher: Royal Zoological Society of New South Wales
Published: 01 January 2012
10.7882/FS.2012.018
EISBN: 978-0-9803272-6-7
... - Cabramurra) in New South Wales, and Mt Bogong - Mt Higginbotham and Mt Buller in Victoria. Populations have shown signs of rapid decline over the last 15 years. The duration of snow cover and time of snow melt appear to be linked to the survival rate of the Mountain Pygmy-possum which is under severe threat...
Book Chapter
Series: Other RZS NSW Publications
Publisher: Royal Zoological Society of New South Wales
Published: 01 January 2004
10.7882/FS.2004.037
EISBN: 978-0-9586085-8-9
..., • habitat degradation caused by pastoralism may lead to decline in P. occidentalis . The disturbance processes in the last two hypotheses have little contemporary significance for P. occidentalis populations given the prevailing management emphasis in south-west Western Australia on controlling V. vulpes...