Use of Japanese satellite GMS for following the East Australian Current

1982 ◽  
Vol 33 (6) ◽  
pp. 1097 ◽  
Author(s):  
PJ Mulhearn
Keyword(s):  
New South ◽  
East Australian Current ◽  
Infrared Images ◽  
South Wales ◽  
Tasman Sea ◽  
Geostationary Meteorological Satellite ◽  
Temperature Signal ◽  
Time Variations ◽  
Hot Surface ◽  
Meteorological Satellite

A series of infrared images from the Japanese geostationary meteorological satellite (GMS) for the period late July to early December 1980 was found to reveal many useful oceanographic features of the western Tasman Sea. Although the temperature signal is digitized in steps of 1.73� C, the disadvantage of this somewhat coarse thermal resolution was offset to some extent by the availability of frequent images. The positions of eddy centres could be estimated within �0.25 of an eddy diameter from September onwards, and it was possible to follow their movements over time scales of the order of a month. The hot surface 'core' of the East Australian Current off northern New South Wales was discernible intermittently on images, and composites of core positions over a month revealed complex time variations in current axes. Cloud cover is a major limitation for infrared imagery, but some oceanographic feature was discernible on 63% of images.

scholarly journals Reports of Cubiceps baxteri McCulloch 1923 from Indian Ocean are probably misidentifications of Cubiceps whiteleggii (Waite 1894)

Zootaxa ◽  
2021 ◽  
Vol 4985 (1) ◽  
pp. 142-144
Author(s):  
V. VIJI ◽  
K.C. HARISH ◽  
B. MADHUSOODANA KURUP
Keyword(s):  
Pacific Ocean ◽  
Indian Ocean ◽  
Baja California ◽  
New South ◽  
Tropical Species ◽  
Lord Howe Island ◽  
South Wales ◽  
The Pacific ◽  
Tasman Sea ◽  
The Pacific Ocean

Cubiceps baxteri McCulloch 1923 was described based on a single, imperfect (devoid of a tail) stranded specimen collected from a beach in Lord Howe Island, Tasman Sea. Though C. baxteri was reported as a widely distributed tropical species (Butler 1979), it was mainly a result of its incorrect identification (see Agafonova 1994; Stewart and Last 2015). The distribution of C. baxteri is reported to be restricted to the Pacific Ocean, from Japan and eastwards to Baja California (Mexico), southwards to the Hawaiian Islands, New South Wales (Australia), and Lord Howe Island (Tasman Sea) to the Southern parts of Chile (Eschmeyer et al. 2017; Mundy 2005; Agafonova 1994). 

Hydrological stucture and phytoplankton distribution in the region of a warm-core eddy in the Tasman Sea

1981 ◽  
Vol 32 (4) ◽  
pp. 479 ◽  
Author(s):  
BD Scott
Keyword(s):  
Phytoplankton Biomass ◽  
New South ◽  
Mesoscale Eddy ◽  
Surrounding Water ◽  
The Core ◽  
Phytoplankton Distribution ◽  
Warm Core ◽  
South Wales ◽  
Tasman Sea ◽  
Phosphate Silicate

The distribution of temperature, salinity, density, dissolved oxygen, phosphate, silicate, and nitrate to 2000 m depth, and phytoplankton to 150 m depth is described in the region of an anticyclonic mesoscale eddy located in the Tasman Sea. Vertical discontinuities in the hydrological properties showed that the eddy had entrained several surrounding water types at the surface and at depths of up to 500 m. In particular, Bass Strait water normally found among the slope waters along the New South Wales coast was entrained by the eddy and transported to positions 200 km from the coast. The temperature and salinity of the eddy appeared to have been increased below the core of the eddy at depths of 300-600 m. due to the entrainment of and mixing with Bass Strait water. The distribution of density, oxygen, nutrients and phytoplankton in the central portion of the eddy between 60 and 240 m depth showed differences between adjoining positions which were attributed to vertical water movements within the eddy core. These movements appeared to be responsible for increases of phytoplankton biomass within the eddy, of up to 10 times that of the surrounding ocean.

Growth and migration of tagged eastern Australian king prawns, Penaeus plebejus Hess

1987 ◽  
Vol 38 (2) ◽  
pp. 225 ◽  
Author(s):  
JP Glaister ◽  
T Lau ◽  
VC McDonall
Keyword(s):  
Growth Rates ◽  
Growth Parameters ◽  
New South ◽  
Maximum Size ◽  
East Australian Current ◽  
Von Bertalanffy ◽  
South Wales ◽  
Apparent Relationship ◽  
And Migration ◽  
Related Mortality

Growth rates and migration of P. plebejus were investigated by a series of tagging experiments. Growth records of 157 recaptured, streamer-tagged prawns from 2450 releases were analysed for estimates of von Bertalanffy growth parameters by Fabens method. The size-age relationship differed between sexes with males attaining only 75% of the maximum size of female prawns. There was no appreciable size-related mortality of tagged individuals. Recaptured tagged prawns confirmed the previously determined northerly movement and showed little movement toward deeper water off New South Wales. Once past the easternmost point of the continent dispersal into a range of depths occurred. There was no apparent relationship between rates of movement and size, suggesting that fluctuations in the intensity of the East Australian Current were responsible for variations in these rates. Based on the results of this and other tagging studies, a two-substock hypothesis, defined by the origins of the bulk of recruits, is postulated.

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.

Opportunistic sightings of blue whales off Sydney, Australia

2021 ◽  
Author(s):  
Vanessa Pirotta ◽  
Robert Harcourt
Keyword(s):  
Marine Mammals ◽  
New South ◽  
Short Note ◽  
Balaenoptera Musculus ◽  
Blue Whale ◽  
South Wales ◽  
Tasman Sea ◽  
Migratory Movements ◽  
The Antarctic ◽  
Blue Whales

ABSTRACT Two subspecies of blue whale occur in Australian waters, (1) the pygmy blue whale (Balaenoptera musculus brevicauda) and (2) the Antarctic blue whale (Balaenoptera musculus intermedia). Understanding blue whale presence in Australian waters is critical to ensuring Australia’s protection of these marine mammals as both subspecies were heavily exploited during historical whaling. This short note documents pygmy blue whale sightings in New South Wales waters over the last 18 years. Observations were opportunistically made via citizen science and verified by scientists. Sightings in this note contribute to our limited knowledge of pygmy blue whale distribution along the east coast of Australia and may help understand the migratory movements of New Zealand pygmy blue whales off Australia and in the Tasman Sea. Overall, information presented in this note contributes to Australia’s national and international conservation efforts to protecting blue whales as a migratory and threatened species.

scholarly journals Artificial crevice habitats to assess the biodiversity of vagile macro-cryptofauna of subtidal rocky reefs

2008 ◽  
Vol 59 (8) ◽  
pp. 661 ◽  
Author(s):  
Mateus de A. Baronio ◽  
Daniel J. Bucher
Keyword(s):  
River Discharge ◽  
New South ◽  
Benthic Communities ◽  
East Australian Current ◽  
Kelp Beds ◽  
Rocky Reefs ◽  
South Wales ◽  
Different Seasons ◽  
Differential Exposure ◽  
Subtidal Rocky Reefs

Reef cryptofauna (animals inhabiting cracks and crevices) represent much of a reef’s biodiversity yet are seldom studied owing to their inaccessibility. Subtidal rocky reefs off Brunswick Heads and Byron Bay in northern New South Wales, Australia support benthic communities ranging from coral-dominated offshore reefs to kelp beds of Ecklonia radiata on inshore reefs. It was hypothesised that differential exposure to river discharge and the East Australian Current, as well as proximity to other reef habitats, may produce differences in recruitment and persistence of cryptofauna between superficially similar reefs within a small geographical range. Artificial crevice habitats were deployed at similar depths on three inshore reefs supporting similar Ecklonia densities. Although the species richness of crevice fauna was similar at all reefs, the species composition differed significantly along with the assemblages recruited in different seasons and to different crevice sizes. Neither reef faunas nor that of varying crevice sizes changed consistently with the seasons, yet all crevices appeared equally accessible to colonists. These results demonstrate the potential inadequacy of classifying reef communities for management of regional biodiversity based on the visual dominance of a few species that may not be as sensitive to environmental variables as many of the less obvious taxa.

The total-field geomagnetic coast effect: The CICADA97 line from deep Tasman Sea to inland New South Wales

2000 ◽  
Vol 31 (1-2) ◽  
pp. 52-57 ◽  
Author(s):  
Adrian P. Hitchman ◽  
Peter R. Milligan ◽  
F.E.M. (Ted) Lilley ◽  
Antony White ◽  
Graham S. Heinson
Keyword(s):  
New South ◽  
New South Wales ◽  
Total Field ◽  
Coast Effect ◽  
South Wales ◽  
Tasman Sea
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