scholarly journals Length - weight relationships of freshwater fish from the Murray-Darling River System in inland New South Wales, with particular reference to the Golden PerchMacquaria ambigua

2011 ◽  
Vol 35 (3) ◽  
pp. 435-457 ◽  
Author(s):  
L. Llewellyn
Keyword(s):  
Freshwater Fish ◽  
New South ◽  
New South Wales ◽  
River System ◽  
South Wales

Patterns of waterbird use in wetlands of the Paroo, A river system of inland Australia.

1992 ◽  
Vol 14 (2) ◽  
pp. 128 ◽  
Author(s):  
MT Maher ◽  
LW Braithwaite
Keyword(s):  
New South ◽  
New South Wales ◽  
River System ◽  
Aerial Survey ◽  
Flood Event ◽  
Flood Events ◽  
Inland Wetlands ◽  
South Wales ◽  
Waterbird Species ◽  
North Western

The significance of inland wetlands to Australian waterbirds has been overlooked until recently. One important area identified from regular aerial survey centres on the Paroo River in north-western New South Wales. Between April 1983 and December 1985, a period covering a major flood, waterbird populations were estimated on five wetland systems associated with the Paroo during 14 trips. Fifty- three waterbird species were recorded with the anatids, Anas gibberifrons and Malacorhynchus membranaceus, accounting for 75 per cent of total estimated populations. Most breeding events were observed in those wetlands dominated by Muehlenbeckia florulenta (lignum). Breeding accounted for shifts in waterbird populations between wetland systems. A model of waterbird usage of the five wetland systems in relation to a complete flood event is described. The importance for waterbird conservation of wetlands used for breeding and maintenance of populations between flood events, and threats to the integrity of these wetlands are discussed.

scholarly journals Comparative Angler Catches of Australian Bass (Macquaria novemaculeata) in Three Major River Systems in New South Wales, Australia

2005 ◽  
Vol 18 (2) ◽  
Author(s):  
B. VAN DER WALT ◽  
R. A. FARAGHER ◽  
J. HARRIS
Keyword(s):  
Time Series Data ◽  
New South ◽  
New South Wales ◽  
River System ◽  
Size Composition ◽  
Series Data ◽  
Severe Drought ◽  
Catch Per Unit Effort ◽  
South Wales ◽  
Catch Rates

A joint program between New South Wales Fisheries and three fishing clubs was initiated in 1988 with the aim of collecting standardised catch and effort data during biannual fishing competitions on three major rivers in New South Wales. This paper examines the data to determine trends in the catch of the target species, Australian bass (Macquaria novemaculeata) and to evaluate whether the data can be used to assess Australian bass populations over time. Distinct trends in Australian bass mean length in each river system were evident but catch rates were more variable. Median catch per unit effort was similar (mostly between 0.5 and 1.5 Australian bass·h-1 ) in the Nepean and Williams Rivers although catch rates in the Manning River were nearly always zero. There was an increasing trend in the mean length of Australian bass in all three rivers, possibly representing a recovery in fish populations following severe drought from 1979 to 1983. Low or zero catch rates were continually recorded in the Manning River and size composition data indicated a lack of recruitment through most of the study period. The standardised format of the data collection program provided qualitative and reliable time series data allowing the determination of long-term trends in the population structure of Australian bass which can be used for monitoring and management purposes.

Land management and its impact on water yield on the northern tablelands of New South Wales.

1982 ◽  
Vol 4 (2) ◽  
pp. 78
Author(s):  
PA Wright
Keyword(s):  
New England ◽  
Land Management ◽  
New South ◽  
New South Wales ◽  
River System ◽  
Radical Change ◽  
Water Yield ◽  
South Wales ◽  
Run Off ◽  
The University

The extensive and radical change in pastoral land treatment and management which has taken place on the Northern Tablelands of New South Wales since 1950 has greatly increased the demand on available water, and has at the same time affected the amount and rate of water run-off into streams and dams, and the nature and permanency of springs and streams. This has not only created problems of water scarcity on the Tablelands, but it has serious implications for the Darling River system, of which the Tablelands form a major source of supply, because of reduced run-off into headwater streams, and additional retention of water for livestock in larger, and an increased number of, farm dams. The onset of drought in 1980 precipitated an immediate and serious shortage of water for livestock and urban use. A recognition that this was partly man induced led to the establishment of a Water Management Research project, jointly sponsored by land users and the University of New England. In 1981-2 a detailed study was undertaken of a typical Tablelands area, the Severn River basin, to ascertain and quantify the effects of changed land management. The results of the study, its implications, and conclusions drawn from it are discussed.

Objective derivation of macro invertebrate family sensitivity grade numbers for the SIGNAL biotic index: application to the Hunter River system, New South Wales

1997 ◽  
Vol 48 (2) ◽  
pp. 159 ◽  
Author(s):  
Bruce C. Chessman ◽  
Jane E. Growns ◽  
Amanda R. Kotlash
Keyword(s):  
Iterative Algorithm ◽  
Environmental Quality ◽  
Environmental Variables ◽  
New South ◽  
New South Wales ◽  
River System ◽  
Biotic Index ◽  
Mean Values ◽  
South Wales ◽  
Highly Correlated

Chessman's SIGNAL-95 biotic index was modified on the basis of data from spring and autumn surveys of macroinvertebrates at 42 sites in the Hunter River and tributaries. An iterative algorithm was used to derive improved grade numbers reflecting the pollution sensitivities of individual families of river macroinvertebrates. The new grades were used to calculate values of the modified index (SIGNAL-HU97). These values were highly correlated with SIGNAL-95 values but were more widely spread, giving better discrimination between the sites of higher environmental quality and the more degraded sites. SIGNAL-HU97 values were also more highly correlated than were SIGNAL-95 values with environmental variables such as the conductivity of the water and a riparian, channel and environmental inventory. There was little difference in values between spring and autumn, but riffles consistently had higher mean values than other habitats.

Home Range, Burrow Usage and Diel Activity of Platypuses on the Duckmaloi Weir, New South Wales.

1998 ◽  
Vol 20 (2) ◽  
pp. 308
Author(s):  
M. Mcleod ◽  
D. Goldney
Keyword(s):  
New South ◽  
Activity Patterns ◽  
New South Wales ◽  
River System ◽  
Diel Activity ◽  
Home Ranges ◽  
South Wales ◽  
Ornithorhynchus Anatinus ◽  
Mark Release Recapture ◽  
Individual Variations

Platypuses, Ornithorhynchus anatinus, have been studied on the Duckmaloi River, New South Wales, in a long term mark-release-recapture project from 1986 to 1996. Some animals are recaptured regularly, while others are trapped only once. A high percentage of juveniles are never retrapped. New animals continue to be captured each year. Hence radio-tracking was employed to examine the movements of animals within the river system including their spatial utilisation of the Duckmaloi Weir. Concurrent studies on activity patterns and burrow usage were undertaken. Seventeen animals (I 0 juveniles, 2 subadults and 5 adults) were radio-tracked for various lengths of time between January and October 1993. Telemetric data revealed that radio-tagged animals were not recaptured on all possible occasions. Home ranges (length of river) varied from 0.5 km to 3.5 km. Home ranges of all animals, overlapped extensively, while core area overlap also occurred in the pool behind the Duckmaloi weir. One juvenile male dispersed 8.5 km upstream from the weir. Platypuses typically utilised areas when feeding with water depth between I to 2.5 m, rarely using areas less than 0.5 m deep. Juvenile platypuses were crepuscular and nocturnal, while adults, although mainly nocturnal also exhibited individual variations in diurnality. Although some individuals remained active throughout the night, others returned to burrows before re-entering the water. Animals commonly returned to certain burrow complexes with some exhibiting a higher degree of burrow site specificity than others. Certain burrows were used by nearly all radio-tagged animals over time while others were used by only a select number of individuals. Some animals tracked in the weir pool were found to share burrows.

scholarly journals The Improvers' Legacy: Environmental Studies of the Hawkesbury

1999 ◽  
Vol 5 (2) ◽  
pp. 157
Author(s):  
Suzanne Cumming
Keyword(s):  
Scientific Knowledge ◽  
New South ◽  
New South Wales ◽  
Environmental Studies ◽  
River System ◽  
Environmental Problems ◽  
Future Generations ◽  
European Settlement ◽  
South Wales

Since European settlement began on the Hawkesbury-Nepean River system in New South Wales, two centuries of exploitation has led to various environmental problems. Despite these problems, the Hawkesbury-Nepean River is one of Australia's most scenic waterways. To maintain and restore the river system for future generations requires a combination of an historic perspective with appropriate scientific knowledge.

Al-rich diopside in alluvial ruby and corundum-bearing xenoliths, Australian and SE Asian basalt fields

2003 ◽  
Vol 67 (4) ◽  
pp. 717-732 ◽  
Author(s):  
F. L. Sutherland ◽  
R. R. Coenraads ◽  
D. Schwarz ◽  
L. R. Raynor ◽  
B. J. Barron ◽  
...  
Keyword(s):  
New South ◽  
New South Wales ◽  
River System ◽  
Mineral Inclusions ◽  
South Wales ◽  
Garnet Granulite ◽  
Central Eastern

AbstractAlluvial rubies and sapphires are found in palaeodrainage deposits along the Cudgegong-Macquarie River system, central eastern New South Wales, Australia. A pink to red suite contains Cr (up to 0.6 wt.% Cr2O3) as the main chromophore, exceeding Fe (up to 0.5 wt.%Fe2O3). Corrosive etching suggests a prior xenocrystic Mesozoic-Cenozoic basaltic transport, while Cr2O3/Ga2O3to Fe2O3/TiO2ratios indicate an original metamorphic source. Syngenetic mineral inclusions include Al-rich diopside, meionite and anatase. The Al-rich diopside (‘fassaite’) contains extremely high Al2O3(20–21 wt.%). A blue-green suite contains Fe (up to 0.8 wt.% Fe2O3) as a dominant chromophore, while a rare nepheline-anorthoclase composite inclusion supports a magmatic phonolitic origin. The Cudgegong- Macquarie ruby formation is compared with a garnet granulite origin proposed for Thailand rubies and a xenolith of corundum-bearing garnet granulite from Ruby Hill, Bingara, Australia. Clinopyroxenecorundum thermometry suggests the Cudgegong-Macquarie rubies formed atT>1000–1300ºC, a high equilibrationTfor proposed lithospheric granulites. These rubies form a distinctive suite compared to other rubies from Australian and SE Asian basalt fields, but have some similarities with eastern Thailand rubies.

The Historical and Current Status of Freshwater Fish in New South Wales

1994 ◽  
Vol 29 (3-4) ◽  
pp. 166-176 ◽  
Author(s):  
R. A. Faragher ◽  
J. H. Harris
Keyword(s):  
Freshwater Fish ◽  
New South ◽  
New South Wales ◽  
Current Status ◽  
South Wales
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