Association of Social Classes of the Wallaroo, Macropus robustus (Marsupialia : Macropodidae)

1983 ◽  
Vol 10 (1) ◽  
pp. 39 ◽  
Author(s):  
RJ Taylor
Keyword(s):  
Habitat Use ◽  
New England ◽  
New South ◽  
Adaptive Significance ◽  
Social Classes ◽  
Adult Males ◽  
Adult Females ◽  
South Wales ◽  
The Social ◽  
Large Adult

The association of individuals of different social classes of the wallaroo was examined on two properties (Lana and Newholme) in the New England Tablelands of New South Wales. The density of wallaroos on Lana was seven times greater than that on Newholme. Individuals of different social classes differed in the extent to which they were found alone. More animals were seen alone on Newholme than on Lana but this increase was not uniform over the social classes. Individuals of different social classes did not associate at random. Association patterns differed for individuals in groups of different size. No differences in habitat use were found between different social classes during grazing periods; however, during sheltering periods a greater proportion of large adult males was found in areas with many rocks compared with medium adult males or adult females with young-at-foot. The adaptive significance of the pattern of association of social classes is discussed.

Estimate of the population structure of the estern water dragon, Physignathus lesueurii (Reptilia : Agamidae), along riverside habitat

1993 ◽  
Vol 20 (5) ◽  
pp. 613 ◽  
Author(s):  
MB Thompson
Keyword(s):  
New South ◽  
Average Distance ◽  
First Year ◽  
Adult Size ◽  
Adult Males ◽  
Male Adult ◽  
Adult Females ◽  
South Wales ◽  
Size Growth ◽  
Theoretical Considerations

A population of eastern water dragons, Physignathus lesueurii, was investigated along 1.5km of the Gloucester River in central eastern New South Wales from November 1989 to December 1992. Dragons were caught in all months from September to April, but not in June. In all, 373 dragons were marked and 69 of these were recaptured on one or more occasions. Females are ovigarous in late October, November and December. Only about one third of females have palpable eggs during these months. Hatchlings enter the population in February and March at 4.5g, with a snout-vent length (SVL) of 53mm. In the next season they are 19.5g (SVL 80mm). The dragons grow rapidly for four years to reach adult size. Growth rates are fastest during the first year at 2.25mm SVL per month or 1.25 g per month. The Jolley-Seber population estimate for adult females was 103 +/-49 in the study site or 69 per km of river. Estimates for males and for the total population could not be calculated because individuals were not equally catchable (Leslie's test for equal catchability). However, theoretical considerations place the density of adult dragons at 138-215 per km of river. The largest male was 304mm SVL, 54mm longer than the next-largest water dragon reported. One male was heavier than 1000g. The largest female was 230mm SVL and the heaviest was 490g, or approximately half the mass of the heaviest male. Adult males and adult females have the same proportion of broken tails. Water dragons are fairly sedentary, with an average distance of 76m (range 0-785m) between captures.

Distribution and Aspects of the Biology of the Parma Wallaby, Macropus parma, in New South Wales

1977 ◽  
Vol 4 (2) ◽  
pp. 109 ◽  
Author(s):  
GM Maynes
Keyword(s):  
New South ◽  
New South Wales ◽  
Embryonic Diapause ◽  
Body Measurements ◽  
Adult Males ◽  
Limited Data ◽  
Adult Females ◽  
South Wales ◽  
Sclerophyll Forest ◽  
The Mean

M. pauma, which was formerly thought to be extinct in Australia, has been found in the Great Dividing Range of coastal New South Wales between 29D 28' and 32D 23's. The optimum habitat appears to be areas of wet sclerophyll forest with a thick shrubby understorey in association with grassy areas. Although the species may be locally common, its present status is best defined as rare; it has a limited distribution and normally occurs at a low density throughout its range. Limited data indicate that most young are born between February and June. Two of six females examined were probably in embryonic diapause. Females may mature sexually as early as 12 months old, and at a weight of 2.6-2.8 kg. Adult females in Australia were significantly heavier than those in New Zealand (Kawau I.), and larger in seven external body measurements. In contrast, adult males were significantly larger in Australia than Kawau I. in ear length only. The species is mainly nocturnal and the mean group size is 1.34 animals, i.e. it is usually single individuals that are encountered.

The population pattern of Miniopterus schrebersii (Chiroptera) in north-eastern New South Wales

1966 ◽  
Vol 14 (6) ◽  
pp. 1073 ◽  
Author(s):  
PD Dwyer
Keyword(s):  
New South ◽  
New South Wales ◽  
Population Characteristics ◽  
Adult Males ◽  
Age Classes ◽  
Adult Females ◽  
South Wales ◽  
Wide Range ◽  
North Eastern ◽  
Population Pattern

In north-eastern New South Wales Miniopterus schreibersii is found at a wide range of cave and mine roosts as colonies that may include up to several thousands of individuals. Between April 1960 and September 1963 a field study of the biology and population characteristics of this species was carried out. Field criteria permitting aging of individuals were developed. Age classes considered were juveniles (< 9 months), yearlings (9-21 months), and adults (> 21 months). Seasonal changes in numbers, and in the sex and age composition of colonies were followed in detail at several roosts and comparative information was obtained at others. Movement patterns were assessed by a marking and recapture programme in which 1365 recoveries were obtained from a marked (toe clips and bands) population of 8775. Conspicuous sex or age biases or both were shown to exist in clusters of M. schreibersii at specific roosts and it was suggested that clustering in this species functions, in part, as a social spacing mechanism. Segregation of different sex or age classes at specific colonies permitted classification of colonies as (1) maternity colonies in which adult females and their young predominate, (2) "adult" colonies which are predominantly adult, or adult and yearling, in composition, and (3) "juvenile" colonies in which juveniles, or juveniles and yearlings, are almost prevalent. The observed social biases of colonies appeared to be related to particular phases of the reproductive cycle. Certain adult colonies were interpreted as important sites of copulatory behaviour. Recovery data for two of these mating colonies showed that adult females were more transient members of the colony than adult males. Juveniles are often well represented at adult colonies in the autumn, and during this season their presence may be correlated with a drop in the abundance of older males.

Population dynamics of the common wallaroo (Macropus robustus erubescens) in arid New South Wales

1992 ◽  
Vol 19 (1) ◽  
pp. 1 ◽  
Author(s):  
TF Clancy ◽  
DB Croft
Keyword(s):  
Population Dynamics ◽  
New South ◽  
New South Wales ◽  
Density Fluctuations ◽  
Rainfall Regime ◽  
Total Density ◽  
Adult Males ◽  
Adult Females ◽  
South Wales ◽  
The Common

The population dynamics of the common wallaroo or euro (Macropus robustus erubescens) were investigated in two adjacent sites in far western New South Wales. Wallaroo densities were generally higher in a site of high relief (South Ridge) than in one of low relief (South Sandstone); however, both sites exhibited large fluctuations in numbers (ranges of 2.23-18.31 per km*2 and 3.48-19.99 per km*2, respectively). The proportion of adult males relative to adult females was significantly higher in South Sandstone (c. 1.1 : 1) than in South Ridge (c. 0.4: 1), indicating a difference in habitat usage by the sexes. At both sites, fluctuations in overall density were best explained by changes in the density of adult females; however, the relative importance of changes in the numbers of other size-sex classes in determining density fluctuations differed between the two sites. Total density was significantly related to the previous rainfall regime in South Ridge but not in South Sandstone. Reproductive condition of females and survivorship of young were related to environmental conditions. Adult mortality ranged from 4.55 to 25.81% per year and adult survivorship was positively correlated with the abundance of grass. Evidence is presented to support the hypothesis that dispersal of subadults is predominantly a male phenomenon.

Some potassium‐argon ages in New England, New South Wales

1963 ◽  
Vol 10 (2) ◽  
pp. 313-316 ◽  
Author(s):  
J. A. Cooper ◽  
J. R. Richards ◽  
A. W. Webb
Keyword(s):  
New England ◽  
New South ◽  
New South Wales ◽  
South Wales

Drinking water quality in regional Hunter New England, New South Wales, Australia, 2001-2015

2020 ◽  
Vol 24 (1) ◽  
pp. 73-83 ◽  
Author(s):  
Fidelis Godfrey Jaravani ◽  
Michelle Butler ◽  
Paul Byleveld ◽  
David N. Durrheim ◽  
Peter. D. Massey ◽  
...  
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
New England ◽  
New South ◽  
New South Wales ◽  
Drinking Water Quality ◽  
South Wales

scholarly journals An overview of thriving through transformation

2017 ◽  
Author(s):  
Boyd Dirk Blackwell
Keyword(s):  
New England ◽  
New South ◽  
Human Existence ◽  
Special Issue ◽  
Competing Interests ◽  
Biennial Conference ◽  
South Wales ◽  
Trade Offs ◽  
Multiple Dimensions ◽  
The University

The articles published in this special issue come from the blind peer review and refinement of papers presented to the biennial conference of the Australia New Zealand Society for Ecological Economics (ANZSEE) held at the University of New England (UNE) in Armidale, New South Wales (NSW), Australia on 19-23 October 2015. All papers jointly contribute to helping transform the human existence toward one that is socially, culturally, environmentally, ecologically, economically and politically sustainable. Transforming our human existence to meet these multiple dimensions of ‘true’ sustainability is a difficult task, balancing potentially competing interests and, inevitably, involving trade-offs between these dimensions.

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