Taxonomic and biogegraphic review of the Australian endemic genus Nannamoria (Gastropoda : Volutidae) with the description of a new bathyal species

1995 ◽  
Vol 9 (1) ◽  
pp. 107
Author(s):  
RC Willan
Keyword(s):  
Continental Shelf ◽  
Outer Continental Shelf ◽  
Endemic Genus ◽  
Eastern Margin ◽  
Eastern Australia ◽  
Biogeographic Region ◽  
North Eastern

Nannamoria Iredale, 1929, is redefined and monophyly is restored by reinstatement of Paramoria McMichael, 1960, and removal of Volutoconus capricorneus Wilson, 1972. Nannamoria is considered to be representative of the Eastern Overlap Zone rather than the Southern Australian Biogeographic Region. Nannamoria ranya, sp. nov., is described from the outer continental shelf and slope off north-eastern Australia. It occurs closer to the eastern margin of the Australian Continental Shelf than any other species of volute.

The Flatback Turtle, Chelonia depressa, in Queensland: Post-Nesting Migration and Feeling Ground Distribution

1983 ◽  
Vol 10 (3) ◽  
pp. 557 ◽  
Author(s):  
CJ Limpus ◽  
CJ Parmenter ◽  
V Baker ◽  
A Fleay
Keyword(s):  
Continental Shelf ◽  
Great Barrier Reef ◽  
Adult Female ◽  
Barrier Reef ◽  
Inshore Water ◽  
Eastern Australia ◽  
North Eastern ◽  
Nesting Beaches ◽  
Feeding Grounds

Between 1968 and 1981, a total of 813 adult female flatback turtles were tagged while nesting on Queensland beaches. Eight have been recovered at a distance, 216-1300 km north of their respective nesting beaches, in waters between the mainland and the Great Barrier Reef. The species' principal feeding grounds seem to be in turbid, shallow inshore water off north-eastern Australia and in the Gulf of Carpentaria; there are no records beyond the continental shelf.

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.

Glacial Lowstand Deposits on the Outer Continental Shelf of Southeastern Australia

1995 ◽  
Vol 44 (2) ◽  
pp. 294-299 ◽  
Author(s):  
Marie A. Ferland ◽  
Peter S. Roy ◽  
Colin V. Murray-Wallace
Keyword(s):  
Amino Acid ◽  
Continental Shelf ◽  
Radiocarbon Dating ◽  
Outer Continental Shelf ◽  
Shallow Marine ◽  
Amino Acid Racemization ◽  
The Core ◽  
Southeastern Australia ◽  
Eastern Australia ◽  
Water Depths

AbstractVibracores collected from water depths of 130 to 150 m on the outer continental shelf of southeastern Australia contain evidence for several cycles of shallow marine deposition. One of these vibracores (112/VC/134; lat. 33°24′S, long, 151°58′ E) preserves evidence for the last three glacial lowstands, as inferred from radiocarbon dating, amino acid racemization, and fossil mollusc assemblages. The core contains the inner-shelf molluscs Pecten fumatus, Placamen placidium, and Tawera gallinula, which today live in water depths of 10 to 50 m, in the cool waters of southern Australia. Radiocarbon dating and amino acid racemization analyses on multiple valves of P. fumatus in the core indicate three distinct age groupings of fossil molluscs: (1) those younger than 20,000 yr B.P., (2) those with minimum ages of about 100,000 yr, and (3) those with minimum ages of about 200,000 yr. We assign these sediments to oxygen isotope stages 2, 6, and 8, respectively. The core contains the first shallow-marine lowstand deposits to be recovered from the shelf of eastern Australia. These deposits constrain the last three glacial lowstands on this margin to water depths <130 m below present sea level.

Isotopic characterization of lifetime movement by two demersal fishes from the northeastern Gulf of Mexico

2021 ◽  
Vol 657 ◽  
pp. 161-172
Author(s):  
JL Vecchio ◽  
JL Ostroff ◽  
EB Peebles
Keyword(s):  
Gulf Of Mexico ◽  
Continental Shelf ◽  
Life Histories ◽  
Linear Mixed Model ◽  
Trophic Position ◽  
Eye Lens ◽  
Outer Continental Shelf ◽  
Red Grouper ◽  
Lens Diameter ◽  
Isotopic Characterization

An understanding of lifetime trophic changes and ontogenetic habitat shifts is essential to the preservation of marine fish species. We used carbon and nitrogen stable isotope values (δ13C and δ15N) recorded within the laminar structure of fish eye lenses, reflecting both diet and location over time, to compare the lifetime trends of 2 demersal mesopredators. Tilefish Lopholatilus chamaeleonticeps inhabit burrows on the outer continental shelf, which results in exceptional site fidelity. Red grouper Epinephelus morio are spawned on the middle to outer continental shelf, move to the inner shelf for the juvenile period, and return offshore upon sexual maturity. Both species inhabit the eastern Gulf of Mexico, a region with a distinctive offshore-inshore gradient in background δ13C values. Within individual tilefish (n = 36), sequences of δ13C values and δ15N values had strong, positive correlations with eye-lens diameter, and strong correlations between the 2 isotopes (mean Spearman r = 0.86), reflecting an increase in trophic position with growth and little lifetime movement. In red grouper (n = 30), δ15N values positively correlated with eye-lens diameter, but correlations between δ15N and δ13C were weak (mean Spearman r = 0.29), suggesting cross-shelf ontogenetic movements. Linear mixed model results indicated strong relationships between δ15N and δ13C values in tilefish eye lenses but no convergence in the red grouper model. Collectively, these results are consistent with previously established differences in the life histories of the 2 species, demonstrating the potential utility of eye-lens isotope records, particularly for investigating the life histories of lesser-known species.

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