Distribution and transport pathways of Panulirus ornatus (Fabricius, 1776) and Panulirus spp. larvae in the Coral Sea, Australia

2001 ◽  
Vol 52 (8) ◽  
pp. 1175 ◽  
Author(s):  
Darren M. Dennis ◽  
C. Roland Pitcher ◽  
Timothy D. Skewes
Keyword(s):  
Ocean Currents ◽  
Boundary Current ◽  
Transport Pathways ◽  
North West ◽  
The North ◽  
Coral Sea ◽  
Breeding Grounds ◽  
Equatorial Current ◽  
Torres Strait ◽  
Phyllosoma Larvae

Distribution of phyllosoma larvae and pueruli of the rock lobster Panulirus ornatus and other Panulirus species was surveyed in the north-west Coral Sea in May 1997 and compared to ocean currents. Distribution of P. ornatus larvae revealed the sources of recruits to the Torres Strait lobster fishery. Phyllosomas and pueruli of P. ornatus dominated the Panulirus spp. plankton-trawl catch. Surviving pueruli were transferred to an aquarium to await confirmation of their identity. Pregilled P. ornatus phyllosomas were most abundant approximately 300 km east of the northern Great Barrier Reef (GBR) and near the confluence of the South Equatorial Current and Coral Sea Gyre. Gilled phyllosomas were also common there but most numerous adjacent to the GBR. Pueruli were most abundant adjacent to the GBR well south of Torres Strait. The distribution of P. ornatus phyllosomas and pueruli in relation to the ocean currents supported the hypothesis that phyllosomas are transported from the Gulf of Papua breeding grounds by the Hiri boundary current into the Coral Sea Gyre and then by surface onshore currents onto the Queensland coast and into Torres Strait. Distributions of larvae of other Panulirus species and the synaxid Palinurellus wieneckii differed from those of P. ornatus.

The Upwelling in the Region between Java and Australia during the South-East Monsoon

1962 ◽  
Vol 13 (3) ◽  
pp. 217 ◽  
Author(s):  
K Wyrtki
Keyword(s):  
Monsoon Season ◽  
The South ◽  
High Concentration ◽  
North West ◽  
The North ◽  
Plankton Biomass ◽  
Equatorial Current ◽  
High Concentrations ◽  
West Monsoon ◽  
Upwelling Area

An examination of the oceanographic conditions in the region between Java and Australia during the south-east monsoon season shows that the main upwelling area in this region is situated along the coast of Java and Sumbawa, and not along the north-west Australian shelf, as was previously assumed. The amount of upwelling south of Java is estimated to contribute 2.4 million m3/sec to the South Equatorial Current and the upwelling velocity is of the order of 50 × 10-5 cm/sec. The region is characterized by very high concentrations of inorganic phosphate at the bottom of the euphotic layer and by a high plankton biomass. The transparency of the water in the upwelling area is low, indicating a high concentration of suspended matter. The possible development of the upwelling during the north-west monsoon season is discussed.

Movements and breeding of the ornate rock lobster, Panulirus ornatus, in Torres Strait and on the north-east coast of Queensland

1987 ◽  
Vol 38 (2) ◽  
pp. 197 ◽  
Author(s):  
RS Bell ◽  
PW Channells ◽  
JW MacFarlane ◽  
R Moore ◽  
BF Phillips
Keyword(s):  
East Coast ◽  
Rock Lobster ◽  
The South ◽  
Breeding Stock ◽  
Biological Question ◽  
North East ◽  
The North ◽  
Breeding Grounds ◽  
Torres Strait ◽  
Papua New Guinean

The principal biological question examined by the investigation was whether the resource of P. ornatus fished in Papua New Guinean waters was the same as that fished in Australian waters. In all, 11 932 specimens of Panulirus ornatus were tagged in Torres Strait and on the north-east coast of Queensland over a 3-year period from February 1980 to March 1983. By June 1984, 300 tagged P. ornatus had been recaptured. Of the 9632 P. ornatus tagged on the east coast of Queensland, none was recaptured in Torres Strait, while most of the 24 recaptures showing movements occurred to the south of the tagging sites. Of the 2300 P. ornatus tagged in Torres Strait, 8 were recaptured at sites to the north-east of the tagging sites in September and October 1980, coincident with the annual breeding emigration of P. ornatus from reefs in Papua New Guinean waters in northern Torres Strait, across the Gulf of Papua to breeding grounds near Yule Island. Results of this tagging study showed that P. ornatus from western Torres Strait also emigrate into Papuan New Guinean waters, where they are fished by both Australian and Papua New Guinean fishermen. However, recapture data also indicated that the population of P. ornatus in south-east Torres Strait and on the east coast of Queensland does not take part in this breeding emigration and may be a separate resource. During the study, 39 berried female P. ornatus were found on the north-east coast of Queensland but none in Torres Strait. The breeding stock near Yule Island may be the source of recruitment to both the Torres Strait and north-east coastal Queensland fisheries.

Some hydrological features of the eastern Arafura Sea and the Gulf of Carpentaria in August 1964

1966 ◽  
Vol 17 (1) ◽  
pp. 31 ◽  
Author(s):  
DJ Rochford
Keyword(s):  
Organic Phosphorus ◽  
High Surface ◽  
Coastal Region ◽  
Biological Action ◽  
Water Masses ◽  
North West ◽  
The North ◽  
Coral Sea ◽  
Arafura Sea ◽  
Phosphate Nitrate

Charts of the distribution of salinity, temperature, inorganic phosphate, nitrate nitrogen, oxygen, and particulate organic phosphorus, for the eastern Arafura Sea and Gulf of Carpentaria in August 1964 are presented. Interrelationships of these properties show that at least three water masses were identifiable in this month. Two were very low in nutrients (phosphate less than 0.20, nitrate less than 1.0 �g-atom/l) but differed in salinity (less than 33.00‰ and greater than 35.50‰). The third was high in nutrients (phosphate greater than 1.40, nitrate greater than 17 �g-atom/l) and had salinities between 33.80 and 34.70‰. The high nutrient water mass was derived from Banda Sea slope water at around 100-150 m, wlth its nutrients increased subsequently by biological action. The other two water masses were formed in the coastal region of West Irian and the Coral Sea. High surface oxygen saturation (139%) and accumulation of organic phosphorus in near-bottom waters of the eastern Arafura Sea were the result of an uplift of Banda slope waters, much earlier in the year than August. In the Gulf of Carpentaria, the August salinity temperature characteristics were formed by the southward drift along the eastern margin of Coral Sea waters, which increased in salinity and decreased in temperature by evaporation. Low salinity water of the previous summer occurred in August, only in the north-west of the gulf.

New insights into reservoir sand provenance in the Exmouth Plateau and Browse Basin

2011 ◽  
Vol 51 (2) ◽  
pp. 715 ◽  
Author(s):  
Peter Southgate ◽  
Keith Sircombe ◽  
Christopher Lewis
Keyword(s):  
Sediment Transport ◽  
Transport Pathways ◽  
North West ◽  
The Past ◽  
The North ◽  
Geological Surveys ◽  
Source Regions ◽  
Provenance Areas ◽  
Spatial Coverage ◽  
Sand Provenance

A pilot study to determine if zircons present in reservoir facies of the North West Shelf can be used to identify provenance and sediment transport pathways has analysed samples from three wells: Guardian–1 and Hijinx–1 (Carnarvon Basin), and Burnside–1 (Browse Basin). Operating companies Chevron, Santos and Hess collected 3–5 kg of cuttings from sandstone bodies intersected in the three wells. Samples were sent to Geoscience Australia for zircon separation and analysis at the Geochronology Laboratory on a sensitive high-resolution ion microprobe (SHRIMP). To provide a statistically meaningful representation of ages in each sample, 70–80 grains were randomly selected for analysis. During the past 20 years, Geoscience Australia and the state geological surveys of WA, NT, Queensland and SA, together with the ANU, UWA and Curtin University, have analysed zircons found in igneous and sedimentary rocks that outcrop in WA and central Australia. This analysis has been done to determine the ages of emplacement, extrusion or maximum depositional ages. This dataset permits the ages of potential onshore provenance areas to be differentiated; hence, correlations can be made between zircons contained within the transported sands and their potential source regions from onshore Australia. In this extended abstract, the spectrum of ages in each sample will be shown, and potential provenance and sediment transport pathways will be discussed. The abstract concludes with the outline of a 2–3 year project to obtain a dataset that will provide a regional stratigraphic and spatial coverage of the North West Shelf for provenance studies.

Poleward boundary current off Western Australia

1983 ◽  
Vol 34 (1) ◽  
pp. 173 ◽  
Author(s):  
RORY Thompson ◽  
G Veronis
Keyword(s):  
Indian Ocean ◽  
Reverse Direction ◽  
Western Coast ◽  
Kelvin Wave ◽  
Boundary Current ◽  
North West ◽  
Leeuwin Current ◽  
The North ◽  
Great Australian Bight ◽  
A Current

The southern Indian Ocean is modelled here as a body of homogeneous water with a shelf and slope region on the eastern side. A 'Leeuwin Current' is found to be the poleward extension of a boundary current generated on the north-west slope of Australia by winter winds. Simple, approximate balances demonstrate that a current forced in one region can propagate in the direction that a Kelvin wave travels but not in the reverse direction. Thus, the Leeuwin Current can be induced by winds acting north of Cape Leeuwin but not by winds in the Great Australian Bight. This study also predicts the existence of a southward current off the western coast of Tasmania.

scholarly journals Bifurcation of the Subtropical South Equatorial Current against New Caledonia in December 2004 from a Hydrographic Inverse Box Model*

2008 ◽  
Vol 38 (9) ◽  
pp. 2072-2084 ◽  
Author(s):  
Alexandre Ganachaud ◽  
Lionel Gourdeau ◽  
William Kessler
Keyword(s):  
Pacific Islands ◽  
New Caledonia ◽  
South Pacific ◽  
Ocean Dynamics ◽  
Box Model ◽  
Boundary Current ◽  
The South ◽  
South Equatorial Current ◽  
The North ◽  
Equatorial Current

Abstract The South Equatorial Current (SEC), the westward branch of the South Pacific subtropical gyre, extends from the equator to 30°S at depth. Linear ocean dynamics predict that the SEC forms boundary currents on the eastern coasts of the South Pacific islands it encounters. Those currents would then detach at the northern and southern tips of the islands, and cross the Coral Sea in the form of jets. The Fiji Islands, the Vanuatu archipelago, and New Caledonia are the major topographic obstacles on the SEC pathway to the Australian coast. Large-scale numerical studies, as well as climatologies, suggest the formation of three jets in their lee: the north Vanuatu jet (NVJ), the north Caledonian jet (NCJ), and the south Caledonian jet (SCJ), implying a bifurcation against the east coast of each island. The flow observed during the SECALIS-2 cruise in December 2004 between Vanuatu and New Caledonia is presented herein. An inverse box model is used to provide quantitative transport estimates with uncertainties and to infer the pathways and boundary current formation. For that particular month, the 0–2000-m SEC inflow was found to be 20 ± 4 Sv (1 Sv ≡ 106 m3 s−1) between Vanuatu and New Caledonia. Of that, 6 ± 2 Sv bifurcated to the south in a boundary current against the New Caledonia coast (the Vauban Current), and the remainder exited north of New Caledonia, feeding the NCJ. The flow is comparable both above and below the thermocline, while complex topography, associated with oceanic eddy generation, introduces several recirculation features. To the north, the NCJ, which extends down to 1500 m, was fed not only by the SEC inflow, but also by waters coming from the north, which have possibly been recirculated. To the south, a westward current rounds the tip of New Caledonia. A numerical simulation suggests a partial continuity with the deep extension of the Vauban Current (this current would then be the SCJ) while the hydrographic sections are too distant to confirm such continuity.

Coral Sea flow budgets in winter

1973 ◽  
Vol 24 (3) ◽  
pp. 203 ◽  
Author(s):  
PD Scully-Power
Keyword(s):  
New Caledonia ◽  
Solomon Islands ◽  
Volume Transport ◽  
Source Water ◽  
Equatorial Undercurrent ◽  
North West ◽  
Geostrophic Balance ◽  
The North ◽  
Coral Sea ◽  
Anticyclonic Eddies

Winter cruises in the Coral Sea indicate very little southerly volume transport a across 20�S. Most of the inflow from the east between New Caledonia and the Solomon Islands leaves the area between these islands and New Guinea. This outflow is considered to form a major source water for the lower cell of the Equatorial Undercurrent (Cromwell Current) which is in geostrophic balance. South of 20°S., the East Australian Current is postulated to be a series of southward meandering anticyclonic eddies near the edge of the continental shelf. In the north-west Coral Sea there is high variability of volume transport both in strength and direction, and no regular pattern can be discerned.

scholarly journals Ship Routing Utilizing Strong Ocean Currents

2013 ◽  
Vol 66 (6) ◽  
pp. 825-835 ◽  
Author(s):  
Yu-Chia Chang ◽  
Ruo-Shan Tseng ◽  
Guan-Yu Chen ◽  
Peter C Chu ◽  
Yung-Ting Shen
Keyword(s):  
Flow Speed ◽  
Current Data ◽  
Ocean Currents ◽  
Surface Velocity ◽  
Western Boundary ◽  
Boundary Current ◽  
Ship Routing ◽  
Slow Steaming ◽  
The North ◽  
The Kuroshio

From the Surface Velocity Program (SVP) drifter current data, a detailed and complete track of strong ocean currents in the north-western Pacific is provided using the bin average method. The focus of this study is on the Kuroshio, the strong western boundary current of the North Pacific flowing northward along the east coast of Taiwan and then turning eastward off southern Japan. With its average flow speed of about 2 knots, the Kuroshio can significantly increase the ship's speed for a “super-slow-steaming” container ship travelling at speeds of 12 knots between the ports of Southeast Asia and Japan. By properly utilizing knowledge of strong ocean currents to follow the Kuroshio on the northbound runs and avoid it on the return trip, considerable fuel can be saved and the transit time can be reduced. In the future, the detailed Kuroshio saving-energy route could be built into electronic chart systems for all navigators and shipping routers.

Review of Australian species of Plectranthias Bleeker and Selenanthias Tanaka (Teleostei: Serranidae: Anthiadinae), with descriptions of four new species

Zootaxa ◽  
2021 ◽  
Vol 4918 (1) ◽  
pp. 1-116
Author(s):  
ANTHONY C. GILL ◽  
JOHN J. POGONOSKI ◽  
GLENN I. MOORE ◽  
JEFFREY W. JOHNSON
Keyword(s):  
Great Barrier Reef ◽  
Reef Coral ◽  
Barrier Reef ◽  
North West ◽  
The North ◽  
Christmas Island ◽  
Lord Howe Island ◽  
Coral Sea ◽  
Tasman Sea ◽  
Arafura Sea

Australian species of the anthiadine genera Plectranthias and Selenanthias are reviewed. Twenty-two species of Plectranthias and two species of Selenanthias are recorded from Australian waters: Plectranthias sp. 1 from a seamount north of Middleton Reef and Norfolk Ridge, Tasman Sea; P. alleni Randall from off southwest Western Australia; P. azumanus (Jordan & Richardson) from off southwest Western Australia; P. bennetti Allen & Walsh from Holmes Reef, Coral Sea; P. cruentus Gill & Roberts from Lord Howe Island, and possibly off Stradbroke Island, Queensland; P. ferrugineus n. sp. from the North West Shelf and Arafura Sea; P. fourmanoiri Randall from Christmas Island and Holmes Reef, Coral Sea; P. grahami n. sp. from off central New South Wales, Tasman Sea; P. inermis Randall from Christmas Island; P. japonicus (Steindachner) from the Arafura Sea and North West Shelf; P. kamii Randall from the Coral Sea, Lord Howe Island and Christmas Island; P. lasti Randall & Hoese from the North West Shelf and off Marion Reef, Queensland; P. longimanus (Weber) from the Timor Sea, Great Barrier Reef, Coral Sea and southern Queensland; P. maculicauda (Regan) from southeastern Australia; P. mcgroutheri n. sp. from the North West Shelf; P. megalophthalmus Fourmanoir & Randall from northeast of the Whitsunday Islands, Queensland; P. melanesius Randall from southeastern Queensland and a seamount north of Middleton Reef; P. moretonensis n. sp. from off Stradbroke Island, Queensland; P. nanus Randall from the Cocos (Keeling) Islands, Christmas Island, Great Barrier Reef and Coral Sea; P. retrofasciatus Fourmanoir & Randall from the Great Barrier Reef; P. robertsi Randall & Hoese from off Queensland, Coral Sea; P. winniensis (Tyler) from the Great Barrier Reef and Coral Sea; Selenanthias analis Tanaka from the North West Shelf and Arafura Sea; and S. barroi (Fourmanoir) from west of Lihou Reef, Coral Sea. Five of the species represent new records for Australia: P. azumanus, P. kamii, P. megalophthalmus, P. melanesius and S. barroi. Previous records of P. megalophthalmus from the North West Shelf are based on misidentified specimens of P. lasti. Records of P. wheeleri from the North West Shelf are based on specimens here identified as P. mcgroutheri n. sp. A record of P. yamakawai Yoshino from Christmas Island is based on a misidentified specimen of P. kamii. Plectranthias retrofasciatus was previously recorded from the Great Barrier Reef as P. pallidus Randall & Hoese, here shown to be a junior synonym of P. retrofasciatus. Video-based records of P. kelloggi from the Great Barrier Reef appear to be based on P. retrofasciatus. Identification keys, diagnoses, character summaries, photographs and Australian distribution information are presented for all species. Full descriptions are provided for the new species and for those newly recorded from Australia. 

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