Biotic characteristics of Ordovician deep-water cherts from Eastern Australia

2012 ◽  
Vol 367-368 ◽  
pp. 63-72 ◽  
Author(s):  
Ian G. Percival
Keyword(s):  
Deep Water ◽  
Eastern Australia ◽  
Biotic Characteristics

Conodont Biostratigraphy of Ordovician Deep-Water Turbiditic Sequences in Eastern Australia—A New Biozonal Scheme for the Open-Sea Realm

2021 ◽  
Vol 32 (3) ◽  
pp. 486-500
Author(s):  
Yong Yi Zhen ◽  
Ian G. Percival ◽  
Phil Gilmore ◽  
Jodie Rutledge ◽  
Liann Deyssing
Keyword(s):  
Deep Water ◽  
Conodont Biostratigraphy ◽  
Open Sea ◽  
Eastern Australia

Exploring New Zealand's marine territory

2011 ◽  
Vol 51 (1) ◽  
pp. 549 ◽  
Author(s):  
Chris Uruski
Keyword(s):  
New Zealand ◽  
Deep Water ◽  
Seismic Data ◽  
East Coast ◽  
Sedimentary Basins ◽  
Petroleum Exploration ◽  
Seismic Survey ◽  
Data Set ◽  
Eastern Australia ◽  
Deep Water Part

Around the end of the twentieth century, awareness grew that, in addition to the Taranaki Basin, other unexplored basins in New Zealand’s large exclusive economic zone (EEZ) and extended continental shelf (ECS) may contain petroleum. GNS Science initiated a program to assess the prospectivity of more than 1 million square kilometres of sedimentary basins in New Zealand’s marine territories. The first project in 2001 acquired, with TGS-NOPEC, a 6,200 km reconnaissance 2D seismic survey in deep-water Taranaki. This showed a large Late Cretaceous delta built out into a northwest-trending basin above a thick succession of older rocks. Many deltas around the world are petroleum provinces and the new data showed that the deep-water part of Taranaki Basin may also be prospective. Since the 2001 survey a further 9,000 km of infill 2D seismic data has been acquired and exploration continues. The New Zealand government recognised the potential of its frontier basins and, in 2005 Crown Minerals acquired a 2D survey in the East Coast Basin, North Island. This was followed by surveys in the Great South, Raukumara and Reinga basins. Petroleum Exploration Permits were awarded in most of these and licence rounds in the Northland/Reinga Basin closed recently. New data have since been acquired from the Pegasus, Great South and Canterbury basins. The New Zealand government, through Crown Minerals, funds all or part of a survey. GNS Science interprets the new data set and the data along with reports are packaged for free dissemination prior to a licensing round. The strategy has worked well, as indicated by the entry of ExxonMobil, OMV and Petrobras into New Zealand. Anadarko, another new entry, farmed into the previously licensed Canterbury and deep-water Taranaki basins. One of the main results of the surveys has been to show that geology and prospectivity of New Zealand’s frontier basins may be similar to eastern Australia, as older apparently unmetamophosed successions are preserved. By extrapolating from the results in the Taranaki Basin, ultimate prospectivity is likely to be a resource of some tens of billions of barrels of oil equivalent. New Zealand’s largely submerged continent may yield continent-sized resources.

Austrarturellidae (Crustacea : Isopoda : Valvifera), a new family from Australasia

1992 ◽  
Vol 6 (4) ◽  
pp. 843 ◽  
Author(s):  
GCB Poore ◽  
TM Bardsley
Keyword(s):  
New Zealand ◽  
Continental Shelf ◽  
Deep Water ◽  
Type Species ◽  
Proximal Part ◽  
New Family ◽  
Eastern Australia ◽  
The Family ◽  
North Eastern

The family Austrarcturellidae is established for Austrarcturella, gen. nov., Abyssarcturella, gen. nov., Pseudarcturella Tattersall (1921) and Scyllarcturella, gen. nov. Males of this family share a uniquely modified first pleopod in which the exopod has a lateral secondary ramus. The pleotelson is usually of a unique inverted flat-bottomed boat-shape, and the dactyli of pereopods 2 and 3 have a minute proximal part and elongate unguis. The genus Pseudarcturella Tattersall (1921) is redefined; its type species, P. chiltoni Tattersall, is redescribed and P. crenulata, sp. nov. added. Thirteen species of Austrarcturella, gen. nov. are described from the Australian continental shelf and slope: A. oculata (Beddard) (type species), A. aphelura, sp. nov., A. brychia, sp. nov., A. callosa, sp. nov., A. cava (Hale), A. corona, sp. nov., A. hirsuta, sp. nov., A. inornata, sp. nov., A. macrokola, sp. nov., A. pictila, sp. nov., A. sexspinosa, sp. nov., A. spinipes, sp, nov. and A. thetidis, sp. nov. One further species, A. galathea, sp, nov., is described from New Zealand. Abyssarcturella, gen. nov. is diagnosed and two species from deep water in eastern Australia are described: A. panope, sp. nov. (type species) and A. cidaris, sp. nov. Scyllarcturella, gen, nov. is diagnosed for S. falcata, sp. nov. from deep water in north-eastern Australia. Keys to all taxa are presented and their distributions are briefly discussed.

Comparison of life histories of two deep-water sharks from eastern Australia: the piked spurdog and the Philippine spurdog

2016 ◽  
Vol 67 (10) ◽  
pp. 1546 ◽  
Author(s):  
Cassandra L. Rigby ◽  
Ross K. Daley ◽  
Colin A. Simpfendorfer
Keyword(s):  
Life History ◽  
Deep Water ◽  
Life Histories ◽  
Growth Models ◽  
New South ◽  
South Wales ◽  
Eastern Australia ◽  
History Of ◽  
Males And Females ◽  
Species Specific

Deep-water sharks have low biological productivity and are vulnerable to exploitation with species-specific regional life history required to enable effective management. The present study describes the life history of two squalids collected from Australia: (1) the piked spurdog (Squalus megalops) from the tropical Great Barrier Reef; and (2) the Philippine spurdog (S. montalbani) from New South Wales. Maximum observed ages for males and females were 18 and 25 years for S. megalops and 28 and 27 years for S. montalbani. Multiple growth models were all well supported and indicated very slow growth rates for both species. The tropical S. megalops population was smaller and older at maturity than previously reported temperate populations. Males were mature at 352-mm stretched total length (LST) and 12.6 years, whereas females were mature at 422mm LST and 19.1 years. Squalus montalbani males were mature at 700mm LST and 21.8 years, whereas females were mature at 800mm LST and 26 years. Fecundity was lower for S. megalops than S. montalbani with two to three compared with nine to 16 embryos. Both species have a conservative life history, although in the event of overfishing the longer-lived, later-maturing and deeper-dwelling S. montalbani is likely to take longer to recover than S. megalops.

Habitat requirements and spawning strategy of an estuarine-dependent fish, Percalates colonorum

2014 ◽  
Vol 65 (3) ◽  
pp. 218 ◽  
Author(s):  
Dylan E. van der Meulen ◽  
Chris T. Walsh ◽  
Matthew D. Taylor ◽  
Charles A. Gray
Keyword(s):  
Deep Water ◽  
Habitat Requirements ◽  
Fine Scale ◽  
Spatial And Temporal Patterns ◽  
Spawning Activity ◽  
Eastern Australia ◽  
Close Proximity ◽  
Prey Items ◽  
Spawning Habitats ◽  
Timing Of Spawning

Determining the links among estuarine hydrography, habitat and spawning of estuarine-dependent fish is essential for understanding reproductive dynamics, recruitment processes and directing conservation efforts. Acoustic tracking was used to evaluate fine-scale spatial and temporal patterns in spawning activity of Percalates colonorum (estuary perch) within the Shoalhaven River, south-eastern Australia. Plankton tows were used to determine the timing of spawning events. Tagged P. colonorum exhibited movements restricted to areas of structurally complex large wooden debris and a concrete ferry landing. Egg counts confirmed that spawning events coincided with adult aggregations, whereas egg abundances peaked at night during the first 2 h of the run-out tide. We postulate that spawning and recruitment success of P. colonorum is attributable to its selective spawning habitats that are (1) structurally complex to provide refuge and protection from predation, as well as congregate prey items, (2) adjacent to deep water of high velocities to maximise egg dispersal and (3) in close proximity to river entrance to facilitate coastal dispersal of eggs and inter-estuarine connectivity of larvae.

Deep-water Galatheidae (Crustacea: Decapoda: Anomura) from southern and eastern Australia

Zootaxa ◽  
2004 ◽  
Vol 472 (1) ◽  
pp. 1 ◽  
Author(s):  
SHANE T. AHYONG ◽  
GARY C.B. POORE
Keyword(s):  
New Species ◽  
Deep Water ◽  
Distinct Species ◽  
Australian Species ◽  
Eastern Australia ◽  
Two New Species ◽  
First Time ◽  
A New Species

Twenty-nine species in five genera of deep-water Galatheidae are reported from southern and eastern Australia increasing the known Australian galatheid fauna from 55 to 74. Species of Paramunida and Agononida are reported for the first time from southern Australia, with a new species of each described, P. antipodes and A. procera. Seven new species of Munida are described (M. aequalis, M. asprosoma, M. chydaea, M. endeavourae, M. isos, M. kapala, and M. spinicruris) increasing the number of known Australian species from 12 to 19. Four new species of Munidopsis are described (Ms. kensleyi, Ms. proales, Ms. tasmaniae, Ms. treis) and three species are newly recorded from Australia (Ms. centrina, Ms. dasypus, Ms. subsquamosa) increasing the known fauna from 11 to 18. Previous records of Ms. dasypus are based on Ms. kensleyi, but we include the first reliable record of M. dasypus from Australia. Previous records of Munida japonica from Australia are referable to M. rogeri Macpherson. Previous Australian records of Munida microps Alcock are referable to two new species, M. endeavourae and M. isos. Previous Australian records of Ms. dasypus are referable to Ms. kensleyi. Raymunida formosanus Lin, Chan & Chu is reported for the first time from Australia. Alcock s (1894) Munida squamosa var. prolixa is recognised as a distinct species of Agononida.

scholarly journals Insights Into Insular Isolation of the Bull Shark, Carcharhinus leucas (Müller and Henle, 1839), in Fijian Waters

2020 ◽  
Vol 7 ◽  
Author(s):  
Kerstin B. J. Glaus ◽  
Sharon A. Appleyard ◽  
Brian Stockwell ◽  
Juerg M. Brunnschweiler ◽  
Mahmood Shivji ◽  
...  
Keyword(s):  
Deep Water ◽  
New Caledonia ◽  
Small Sample Size ◽  
Snp Markers ◽  
Small Sample ◽  
Heterogeneous Distribution ◽  
Carcharhinus Leucas ◽  
Distinct Cluster ◽  
Eastern Australia ◽  
Bull Shark

The bull shark (Carcharhinus leucas) is a large, mobile, circumglobally distributed high trophic level predator that inhabits a variety of remote islands and continental coastal habitats, including freshwater environments. Here, we hypothesize that the barriers to dispersal created by large oceanic expanses and deep-water trenches result in a heterogeneous distribution of the neutral genetic diversity between island bull shark populations compared to populations sampled in continental locations connected through continuous coastlines of continental shelves. We analyzed 1,494 high-quality neutral single nucleotide polymorphism (SNP) markers in 215 individual bull sharks from widespread locations across the Indian and Pacific Oceans (South Africa, Indonesia, Western Australia, Papua New Guinea, eastern Australia, New Caledonia, and Fiji). Genomic analyses revealed partitioning between remote insular and continental populations, with the Fiji population being genetically different from all other locations sampled (FST = 0.034–0.044, P < 0.001), and New Caledonia showing marginal isolation (FST = 0.016–0.024, P < 0.001; albeit based on a small sample size) from most sampled sites. Discriminant analysis of principal components (DAPC) identified samples from Fiji as a distinct cluster with all other sites clustering together. Genetic structure analyses (Admixture, fastStructure and AssignPOP) further supported the genetic isolation of bull sharks from Fiji, with the analyses in agreement. The observed differentiation in bull sharks from Fiji makes this site of special interest, as it indicates a lack of migration through dispersal across deep-water trenches and large ocean expanses.

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