Poisson ratio-based AVO indicator to detect hydrocarbon-saturated reservoirs: example from North Western Australian Offshore

Allozyme variation was used to investigate the genetic structure of Lutjanus sebae, Lethrinus nebulosus, Lethrinus choerorynchus, and Epinephelus multinotatus, which are components of a multispecies fishery off north-western Australia. Samples of each species were obtained from five or six localities, over a total distance of 1400-2080 km. Allelic variation was found at 13-16 loci in each species. The consistent picture to emerge was one of little genetic subdivision in all four species, with average values of FST ranging from 0.003 in L. sebae to 0.012 in E. multinotatus. Although there was statistically significant variation in allelic frequencies in three of the species, there were no clear geographical groupings of populations. With the possible exception of clinal variation for aldehyde oxidase in E. multinotatus, all heterogeneity of allelic frequencies was within the range that could easily be due to within-generation effects of selection. Thus, the allozyme data are consistent with the view that there are extensive connections of populations over large distances. The electrophoretic study also confirmed that, contrary to suggestions in the literature, L. nebulosus, L. choerorynchus, and Lethrinus laticaudis are reproductively isolated species.

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THE SYMBOLISM OF THE NORTH-WESTERN AUSTRALIAN ZIGZAG DESIGN

Oceania ◽

10.1002/j.1834-4461.1972.tb00315.x ◽

1972 ◽

Vol 42 (3) ◽

pp. 223-238 ◽

Cited By ~ 1

Author(s):

C. G. von Brandenstein

Keyword(s):

The North ◽

Western Australian ◽

North Western

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Tropical inshore dolphins of north-western Australia: Unknown populations in a rapidly changing region.

Pacific Conservation Biology ◽

10.1071/pc120056 ◽

2012 ◽

Vol 18 (1) ◽

pp. 56 ◽

Cited By ~ 29

Author(s):

Simon J Allen ◽

Daniele D Cagnazzi ◽

Amanda J Hodgson ◽

Neil R Loneragan ◽

Lars Bejder

Keyword(s):

Western Australia ◽

Ad Hoc ◽

Bottlenose Dolphins ◽

Urban Centre ◽

The North ◽

Dolphin Population ◽

Population Sizes ◽

Commonwealth Government ◽

Western Australian ◽

North Western

Australian Snubfin Orcaella heinsohni, Indo-Pacific Humpback Sousa chinensis and Indo-Pacific Bottlenose Dolphins Tursiops aduncus inhabit Australia’s tropical north-western coastline, a region undergoing extensive port development associated with the massive expansion of the oil, gas and mining industries. The current lack of data on dolphin population sizes or trends precludes impact assessments of developments on these protected species. Furthermore, the Western Australian and Commonwealth Government conservation listings of tropical inshore dolphins do not reflect their international listings. From April to July, 2010, we conducted ad hoc boat-based surveys (n=55) of inshore delphinids at seven sites across north-western Australia from Coral Bay in the south (23.1°S: 113.8°E) to Cable Beach in the north (17.9°S: 122.2°E). We documented the locations of these three species from which we obtained photoidentification and biopsy data, as well as reports of Australian Snubfin Dolphin sightings from researchers and community groups. The data from this limited field effort confirm that Indo-Pacific Humpback and Indo-Pacific Bottlenose Dolphins occur in the waters adjacent to each north-western Australian urban centre and show that the range of the Australian Snubfin Dolphin extends considerably further south-west than previously reported. Given the scale of coastal developments and the vulnerability of isolated cetacean populations to fragmentation or extirpation, assessments of the viability of dolphin populations are required. Our data suggest that the Australian Snubfin, Indo-Pacific Humpback and Indo-Pacific Bottlenose Dolphins need to be considered as likely to be impacted by coastal developments across north-western Australia.

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Patterns of Dolphin Bycatch in a North-Western Australian Trawl Fishery

PLoS ONE ◽

10.1371/journal.pone.0093178 ◽

2014 ◽

Vol 9 (4) ◽

pp. e93178 ◽

Cited By ~ 16

Author(s):

Simon J. Allen ◽

Julian A. Tyne ◽

Halina T. Kobryn ◽

Lars Bejder ◽

Kenneth H. Pollock ◽

...

Keyword(s):

Trawl Fishery ◽

Western Australian ◽

North Western

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Comparative distribution of macrocrustaceans in a north-western Australian mangrove system

Marine and Freshwater Research ◽

10.1071/mf9840591 ◽

1984 ◽

Vol 35 (5) ◽

pp. 591 ◽

Cited By ~ 11

Author(s):

FE Wells

Keyword(s):

Species Diversity ◽

Trophic Levels ◽

Deposit Feeders ◽

Mangrove System ◽

Low Diversity ◽

Mollusc Species ◽

Density And Biomass ◽

Deposit Feeding ◽

Western Australian ◽

North Western

Species diversity, density and biomass of macromolluscs and macrocrustaceans were investigated in the Bay of Rest (22� 18'S.,114�08'E.), a small mangrove system in north-western Australia. Mollusc species diversity, density and biomass were generally greatest on the seaward mudflat and lower in Avicennia and Rhizophora tree zones; no molluscs were recorded on the landward backflat. Crustaceans were diverse and abundant on the mudflat but the biomass was low. Diversity, density and biomass were high in Avicennia, lower in Rhizophora and the backflat. Filter-feeding molluscs were important on the mudflat, as were deposit feeders which dominated in Avicennia. Surface raspers were most important in Rhizophora. Deposit feeding and omnivorous crustaceans were dominant in all areas. It is suggested that molluscs and crustaceans in the system, both in the tree zones and on the seaward mudflat, are largely dependent on detrital breakdown of the mangroves for their nutrition. They may play a key role in converting primary production by the trees into animal tissue available to higher trophic levels.

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