Nearshore features of the East Australian Current System

1983 ◽  
Vol 34 (1) ◽  
pp. 105 ◽  
Author(s):  
GR Cresswell ◽  
C Ellyett ◽  
R Legeckis ◽  
AF Pearce
Keyword(s):  
New South ◽  
Current System ◽  
New South Wales ◽  
Colour Change ◽  
Breaking Waves ◽  
Visual Observation ◽  
Warm Water ◽  
Research Vessel ◽  
East Australian Current ◽  
South Wales

An airborne infrared scanner was used to map fronts and wakes that occurred at New South Wales headlands and islets. The major front was interpreted as consisting of warm water flowing southward to Point Plomer and then separating from the coast at a 60� angle. Cooler southern water flowed northward to the front and was probably entrained into it. Visual observation from the air showed a colour change and breaking waves at the front. A system of cool northward flowing littoral currents appeared to occur independently of the offshore currents. The relation of the front to the overall East Australian Current system could be interpreted from data obtained by the NOAA-6 satellite and a research vessel at the time.

Australia's Distinctive National Parks System

1991 ◽  
Vol 18 (4) ◽  
pp. 331-340 ◽  
Author(s):  
Geoffrey Charles Wescott
Keyword(s):  
Federal Government ◽  
National Parks ◽  
National Park ◽  
New South ◽  
Average Rate ◽  
Current System ◽  
New South Wales ◽  
South Wales ◽  
Land Mass ◽  
The Usa

Australia possesses a distinctive national parks and conservation reserves system, in which it is the State Governments rather than the Federal Government which owns, plans, and manages, national parks and other conservation reserves.Most Australian States declared their first national parks in the latter quarter of last century, Australia's first national park being declared in New South Wales in March 1879. These critical declarations were followed by a slow accumulation of parks and reserves through to 1968. The pace of acquisition then quickened dramatically with an eight-fold expansion in the total area of national parks between 1968 and 1990, at an average rate of over 750,000 ha per annum. The present Australian system contains 530 national parks covering 20.18 million hectares or 2.6% of the land-mass. A further 28.3 million hectares is protected in other parks and conservation reserves. In terms of the percentage of their land-mass now in national parks, the leading States are Tasmania (12.8%) and Victoria (10.0%), with Western Australia (1.9%) and Queensland (2.1%) trailing far behind, and New South Wales (3.92%) and South Australia (3.1%) lying between.The Australian system is also compared with the Canadian and USA systems. All three are countries of widely comparable cultures that have national parks covering similar percentage areas, but Canada and the USA have far fewer national parks than Australia and they are in general of much greater size. In addition, Canada and the USA ‘resource’ these parks far better than the Australians do theirs. The paper concludes that Australia needs to rationalize its current system by introducing direct funding, by the Federal Government, of national park management, and duly examining the whole system of reserves from a national rather than States' viewpoint.

Further observations of high-frequency current variations on the continental shelf near Sydney, New South Wales

1984 ◽  
Vol 35 (6) ◽  
pp. 611 ◽  
Author(s):  
XH Fang ◽  
FM Boland ◽  
GR Cresswell
Keyword(s):  
Continental Shelf ◽  
Internal Waves ◽  
Energy Flux ◽  
High Frequency ◽  
New South ◽  
New South Wales ◽  
Research Vessel ◽  
High Frequency Current ◽  
South Wales ◽  
Frequency Current

A triangular current-meter mooring array and concurrent research vessel observations were used to observe high-frequency current variations for 9 days in April 1981 on the continental shelf off Sydney, N.S.W. Internal waves propagated onshore at 0.6 m s-1 with an energy flux of the order of 103 J m-1 s-1. One soliton-like event was recorded and it also propagated onshore at 0.6 m s-1.

Predation of Fish in Farm Dams by Cormorants, Phalacrocorax Spp.

1984 ◽  
Vol 11 (3) ◽  
pp. 559 ◽  
Author(s):  
CG Barlow ◽  
K Bock
Keyword(s):  
New South ◽  
New South Wales ◽  
Warm Water ◽  
Great Cormorant ◽  
Alternative Prey ◽  
Phalacrocorax Carbo ◽  
Cherax Destructor ◽  
South Wales ◽  
Black Cormorant ◽  
Stocking Rates

The effect of cormorants on the survival of native warm-water fishes in farm dams in south-western New South Wales was monitored during 1979 and 1980. Three species of cormorants frequented the dams: the great cormorant Phalacrocorax carbo, the little pied cormorant P. melanoleucos, and the little black cormorant P. sulcirostris. In dams fished by cormorants, more than 50% ofthe fish were consumed unless abundant alternative prey, in this case crayfish Cherax destructor, was present. Dams stocked with few fish (approximately 150 ha-1) were less commonly fished than those stocked with many fish (more than 450 ha-1). The majority of dams in the study area were fished by cormorants, which were present from midwinter to midsummer in both years. The results, and an examination of aspects of cormorant biology and methods used to prevent birds eating fish at hatcheries, indicated that buffer populations of crustaceans and low fish stocking rates are suitable methods for minimizing predation of fish in farm dams by cormorants.

scholarly journals First records of three fishes, and southern records of a further four fishes, from New South Wales, Australia

Check List ◽  
2016 ◽  
Vol 12 (6) ◽  
pp. 2008 ◽  
Author(s):  
Tom R. Davis
Keyword(s):  
Fish Larvae ◽  
New South ◽  
New South Wales ◽  
Tropical Fish ◽  
Prolonged Survival ◽  
East Australian Current ◽  
South Wales ◽  
Port Stephens

A study of fishes from Port Stephens in New South Wales, Australia has identified first records for three species in New South Wales — Genicanthus watanabei (Yasuda & Tominaga, 1970), Parupeneus indicus (Shaw, 1803), and Plectorhinchus chaetodonoides (Lacépède, 1801) — and southernmost records for a further four species: Cantherhines fronticinctus (Günther, 1866), Coris bulbifrons (Randall & Kuiter, 1982), Mulloidichthys vanicolensis (Valenciennes, 1831), and Paracirrhites forsteri (Schneider, 1801). New sightings were up to 980 km south of previous records, indicating prolonged survival of tropical fish larvae in the East Australian Current.

A hitherto overlooked type of colour change in frogs and its significance for the identification of species in the Australian genus Neobatrachus

2010 ◽  
Vol 31 (2) ◽  
pp. 283-286
Author(s):  
Klaus Henle
Keyword(s):  
Breeding Season ◽  
National Park ◽  
New South ◽  
New South Wales ◽  
Colour Change ◽  
Extreme Form ◽  
South Wales ◽  
Identification Of Species

AbstractColour change is a well-known phenomenon in many amphibians. Most of these changes involve transient darkening, lightening, or attainment of breeding colours. Nuptial calosities may become lighter outside the main breeding season. Depigmentation as an extreme form of lightening has been documented also for keratinized structures of tadpole mouths. Here I report a hitherto overlooked type of colour change: darkening of metatarsal tubercles from white to almost black. At Kinchega National Park in New South Wales, individuals of the Australian borrowing frog Neobatrachus pictus emerging from their aestivation burrows after rains had white outer metatarsal tubercles. Within a few hours to two days the metatarsal tubercles had turned completely black. This indicates that the extent of black colouration of the outer metatarsal tubercle hitherto used to discriminate the species N. centralis from N. pictus and N. sudelli is unreliable.

The sedimentology and tsunamigenic potential of the Byron submarine landslide off New South Wales, Australia

2020 ◽  
Vol 500 (1) ◽  
pp. 27-40 ◽  
Author(s):  
Kendall C. Mollison ◽  
Hannah E. Power ◽  
Samantha L. Clarke ◽  
Alan T. Baxter ◽  
Emily M. Lane ◽  
...  
Keyword(s):  
Continental Margin ◽  
New South ◽  
New South Wales ◽  
Colour Change ◽  
Submarine Landslide ◽  
Radiocarbon Age ◽  
South Wales ◽  
Age Gap ◽  
Failure Event ◽  
Australian Coastline

AbstractExtensive evidence for submarine landslide failure is found along the east Australian continental margin. This paper assesses the sedimentological properties and models the failure event that created the Byron landslide scar, located on the SE Australian continental margin, c. 34 km off the coast of Byron Bay, New South Wales. Sedimentological analyses and dating (radiocarbon and biostratigraphic) were conducted on three gravity cores collected from within the Byron landslide scar. A paraconformity, identified in one of the three cores by a distinct colour change, was found to represent a distinct radiocarbon age gap of at least 25 ka and probably represents the detachment surface of the slide plane. The core-derived sediment properties for the Byron landslide scar were used to inform hydrodynamic modelling using the freely available numerical modelling software, Basilisk. Model results highlight the important role of sediment rheology on the tsunamigenic potential of the slide and on the resulting inundation along the east Australian coastline, therefore providing a greater understanding of the modern hazard posed by comparable future submarine landslide events for the east Australian coastline.

Annually recurrent diatom blooms in spring along the New South Wales coast of Australia

1993 ◽  
Vol 44 (2) ◽  
pp. 325 ◽  
Author(s):  
GM Hallegraeff ◽  
SW Jeffrey
Keyword(s):  
Continental Shelf ◽  
Chlorophyll A ◽  
Algal Biomass ◽  
New South ◽  
New South Wales ◽  
East Australian Current ◽  
Coastal Fisheries ◽  
The North ◽  
South Wales ◽  
Diatom Blooms

Blooms of phytoplankton (100-280 mg chlorophyll a m-1) occur on the continental shelf off Sydney in the spring of most years. These sudden chlorophyll increases (more than 10 times the normal algal biomass) are due to short-lived diatom blooms that evolve in a predictable sequence from small chainforming species (Nitzschia, Thalassiosira) to large centric species (Lauderia, Rhizosolenia) and eventually to large dinoflagellates (Protoperidinium). Two research cruises (October 1981, September 1984) were conducted to define the longshore extent of this phenomenon. Diatom blooms were widespread along the whole New South Wales coastline, occurring in the 700-km-long region from Cape Hawke in the north (32°S), where the East Australian Current separates from the coast, to Maria Island off Tasmania in the south (43°S). Hydrological mechanisms of these annually recurrent enrichments are related to the action of the East Australian Current and are unlike those triggering spring blooms in temperate European waters. Implications of these diatom blooms for coastal fisheries along the New South Wales coast are briefly discussed.

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