Phylogeographic structure of a freshwater crayfish (Decapoda:Parastacidae:Cherax preissii) in south-western Australia

2006 ◽  
Vol 57 (8) ◽  
pp. 837 ◽  
Author(s):  
Gavin Gouws ◽  
Barbara A. Stewart ◽  
Savel R. Daniels
Keyword(s):  
Gene Flow ◽  
Western Australia ◽  
Molecular Dating ◽  
Phylogeographic Structure ◽  
Freshwater Crayfish ◽  
The North ◽  
South West ◽  
Biogeographical Regions ◽  
Freshwater Decapods ◽  
North Western

Although phylogeographic patterns of freshwater decapods elsewhere in Australia are well documented, little is known of the phylogeography and biogeography of the endemic freshwater fauna of south-western Australia. Here, the phylogeographic structure of a freshwater crayfish, Cherax preissii Erichson, 1846, was investigated to determine contemporary and historical patterns of gene flow and to examined evolutionary and biogeographical scenarios. Allozyme and cytochrome c oxidase subunit I mitochondrial DNA data were collected from 15 populations, sampled across the known C. preissii distribution. Both markers revealed a clear distinction and separation among populations occurring in the north-western and southern portions of the distribution. Inferences of allopatric fragmentation and molecular dating attributed the divergence of the aquatic fauna of these regions to periods of Pliocene–Pleistocene aridity. Connectivity appeared to be greater within each of these regions. Evidence suggested contemporary, but not ongoing, gene flow, particularly within the southern region. This was possibly facilitated by dispersal during pluvial Pleistocene periods or drainage connectivity during episodic marine regressions. The divergence and distributions of these lineages parallels patterns seen in other freshwater crayfish of the region. More explicit investigation of these and further fine-scale phylogeographic studies may contribute to the understanding of biogeography and evolution in the south-west, and may further refine currently recognised biogeographical regions.

Patterns of Distribution of Acacia in Australia

1988 ◽  
Vol 36 (4) ◽  
pp. 385 ◽  
Author(s):  
BR Maslin ◽  
L Pedley
Keyword(s):  
Species Richness ◽  
Western Australia ◽  
Arid Zone ◽  
Patterns Of Distribution ◽  
The North ◽  
Geographic Patterns ◽  
South West ◽  
Eastern Australia ◽  
Semiarid Areas ◽  
The Tropics

Patterns of distribution are described for the three subgenera and nine sections that make up the Australian Acacia flora. Subgenus Phyllodineae (833 species) is widespread and contains 99% of the species; subgenus Acacia (six species) and subgenus Aculeiferum (one species) are poorly represented and virtually confined to the north of the continent. The geographic patterns of species-richness are strongly influenced by sections Phyllodineae (352 species), Juliflorae (219 species) and Plurinerves (178 species). Section Phyllodineae has centres of richness south of the Tropic of Capricorn in temperate and adjacent semiarid areas of eastern, south-eastern and south-western Australia. The section is poorly represented in the tropics. The closely related sections Juliflorae and Plurinerves predominate in the north of the continent, semiarid areas of the south-west, many rocky tablelands of the Arid Zone and along the Great Dividing Range and adjacent inland riverine lowland areas in eastern Australia. The remaining four sections contribute little to the overall patterns of species-richness. The principal speciespoor areas are sandy and fluvial lowland regions of the Arid Zone. In eastern Australia, sections Botrycephalae, Juliflorae, Phyllodineae and Plurinerves show discontinuous patterns of species-richness along the Great Dividing Range. All sections have species whose ranges terminate in the area of the McPherson-Macleay Overlap region.

Community structure and zoogeographic affinities of the coastal fishes of the Dampier region of north-western Australia.

1985 ◽  
Vol 36 (2) ◽  
pp. 247 ◽  
Author(s):  
SJM Blaber ◽  
JW Young ◽  
MC Dunning
Keyword(s):  
Community Structure ◽  
Western Australia ◽  
High Tide ◽  
Organic Content ◽  
Tidal Range ◽  
Nursery Ground ◽  
North West ◽  
Physical Conditions ◽  
The North ◽  
North Western

The species composition and broad trophic structure of the mangrove creek and open shore fish communities of the Dampier region in tropical north-western Australia are described. The habitats are characterized by a lack of freshwater influence, low turbidity and a tidal range in excess of 4 m. Both mangroves and open shores have a diversity of species typical of Indo-west Pacific coastal waters but the physical conditions have modified the community structure both to exclude many families that prefer areas of higher turbidity and reduced salinity, and to include others that usually occur only in clear waters. The fish faunas of the mangroves (113 species) and open shores (106 species) are compared: 54 species were common to both. The deeper waters were dominated by piscivores, which penetrated throughout the mangroves at high tide. Iliophagous species were abundant, particularly in the mangroves where the organic content of the substratum (7.8-8.2%) was not reduced markedly compared with other areas of the Indo-Pacific, despite the lack of freshwater inflow. The clear and deep water in the mangroves at high tide favour predation on juveniles by piscivorous fishes and reduce the effectiveness of such areas as nurseries. There is virtually no overlap of the fauna with that of the deeper waters (>20 m) of the North West Shelf, and the inshore region is not a significant nursery ground for any of the commercially important deeper water species.

Second representative of the order Misophrioida (Crustacea, Copepoda) from Australia challenges the hypothesis of the Tethyan origin of some anchialine faunas

Zootaxa ◽  
2009 ◽  
Vol 2059 (1) ◽  
pp. 51-68 ◽  
Author(s):  
TOMISLAV KARANOVIC ◽  
STEFAN M. EBERHARD
Keyword(s):  
New Species ◽  
Western Australia ◽  
Apical Seta ◽  
Aquatic Fauna ◽  
The North ◽  
Ecological Implications ◽  
Coastal Margin ◽  
North Western ◽  
A New Species ◽  
Swimming Leg

A new species of the genus Speleophria is described from a cave in the Nullarbor region in southern Western Australia. Its congeners include species from the Balearics, Croatia, Bermuda, Yucatan peninsula and north-western Western Australia, all considered to be Tethyan relicts. However, the discovery of the new speleophriid in the Nullarbor region has important biogeographic and ecological implications. From the biogeographic perspective, it either suggests dispersal as the process determining the current distribution pattern of the aquatic fauna found on the Roe Plains or significantly extends the Tethyan track across Australia, from the north-western coastal margin of the continent to the southern coastal margin. From an ecologic perspective, the new speleophriid suggests the possible existence of anchialine habitats in southern Australia. Speleophria nullarborensis sp. nov. can be distinguished from its four congeners by its plesiomorphic 3-segmented endopod of the first swimming leg (2-segmented in other species) and unusually long innermost apical seta on the caudal ramus. Another character that easily distinguishes our new species, and seems to be an autapomorphic feature, is its constricted preanal somite.

Review of periodical articles

Urban History ◽  
2016 ◽  
Vol 43 (2) ◽  
pp. 306-335
Author(s):  
JELLE HAEMERS ◽  
GERRIT VERHOEVEN ◽  
JEROEN PUTTEVILS ◽  
PETER JONES
Keyword(s):  
Social Order ◽  
Western Europe ◽  
Social Groups ◽  
The North ◽  
South West ◽  
The Social ◽  
Depth Analysis ◽  
Urban Elites ◽  
Patrilineal Descent ◽  
North Western

One of the key concepts of Max Weber's writings on cities was that in north-western Europe, the landed nobility and urban elites were clearly distinguished. For Weber, this was indeed a main reason to locate the occidental city in the north rather than in the Mediterranean. Christof Rolker tackles this question in his ‘Heraldische Orgien und Sozialer Aufstieg. Oder: Wo ist eigentlich “oben” in der spätmittelalterlichen Stadt?’, Zeitschrift für Historische Forschung, 52 (2015), 191–224. The in-depth analysis of one of the largest and at the same time most widespread armorials in the late medieval Holy Empire, namely that of Konrad Grünenberg (d. 1494), demonstrates that in Konstanz (where Grünenberg lived) guilds (and not the nobility) first insisted on patrilineal descent as a proof of status. Traditionally, Grünenberg is seen as a paradigmatic social climber, as he left his guild to join the society of the local nobility (called ‘Zur Katz’). Yet his sumptuous armorial, containing over 2,000 coat of arms mainly from the south-west of the Empire, does not mention any single member of this noble society. Instead, it praises the tournament societies of which Grünenberg was not a member, and highlights chivalric events in which he never participated. This, Rolker argues, indicates that armorials were not only about status already gained or to be gained, but also a manual for contemporaries to discuss the social order in a more abstract way. In his ‘Wappenbuch’, Grünenberg constantly explains why he could not join the noble societies he praised, while at the same time he ignored the ‘Zur Katz’ association of which he was a member. Therefore, Rolker concludes that it was not only members (or would-be members) of the respective social groups who knew and reproduced social codes. So the boundary between noble and urban elites was more blurred than Weber claimed – though Rolker is of course not the first to criticize Weber on this. Clearly, Grünenberg's armorial was part and parcel of a wider discussion of origins and kinship, namely patrilineal kinship that took place in several social milieux, rather than simply a book which displayed inherited status.

scholarly journals A PRELIMINARY LIST OF ACRIDIIDÆ OF ONTARIO

1902 ◽  
Vol 34 (10) ◽  
pp. 251-258 ◽  
Author(s):  
E. M. Walker
Keyword(s):  
Native Species ◽  
The South ◽  
Full List ◽  
The North ◽  
South West ◽  
Extreme North ◽  
North Western ◽  
Unrecorded Species

Since the last of my “Notes on Some Ontalio Acridiidæ” were printed, five species have been added to the list, and the number of localities for those already recorded has been considerably increased. I think,therefore, that it will make the notes more complete to conclude them with a full list of the species of this family known to occur in the Province, with their distribution as hitherto recorded.Only a small portion of the territory included in the Province of Ontario has been at all thoroughly explored by entomologists, but I do not believe there are very many native species of Acridiidæ not included in the present list. Doubtless, horvever, some of the Manitoba and Minnesota forms extend into the north-western part of Ontario, while it is extremely probable that there are unrecorded species in the south-west, and possibly a few in the east and extreme north.

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

2012 ◽  
Vol 18 (1) ◽  
pp. 56 ◽  
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.

Systematics of the Freshwater Crayfish Genus Cherax Erichson (Decapoda: Parastacidae) in South-Western Australia: Electrophoretic, Morphological and Habitat Variation

1996 ◽  
Vol 44 (3) ◽  
pp. 223 ◽  
Author(s):  
CM Austin ◽  
B Knott
Keyword(s):  
Western Australia ◽  
Morphological Variability ◽  
Distinct Species ◽  
General Level ◽  
Freshwater Crayfish ◽  
Widespread Species ◽  
South West ◽  
Habitat Variation ◽  
Habitat Differences ◽  
Taxonomic Studies

A detailed study of electrophoretic, morphological and habitat variation amongst species of Cherax in south-western Australia supported the recognition of only five of the eight species currently recognised and revealed that morphological and habitat variation within these crayfish is more extensive and complicated than was previously realised. Within several species morphological and habitat variation was found to be as great as that between species. Furthermore, a major component of the morphological variability, both within and between species, was found to be associated with habitat variation. Three of the five species of Cherax recognised in this study correspond to the consistently recognised and widespread species, C. preissii Erichson, C. quinquecarinatus (Gray) and C. tenuimanus Smith. The two other species are C. crassimantus Riek and C. glaber Riek which have restricted distributions in the extreme south-west of Western Australia. The species C. glabrimanus Riek and C. neocarinatus Riek could not be distinguished from C. quinquecarinatus, nor could C. plebejus (Hess) be distinguished from C. preissii. On a general level, the results of this study question the value of morphological information in systematic studies of freshwater crayfish. Morphologically based taxonomic studies of freshwater crayfish need to be interpreted with caution because, firstly, taxonomic characters may be far more variable than realised; secondly, morphological and habitat differences cannot necessarily be equated with specific distinctions; and thirdly, genetically distinct species that occupy similar habitats need not be morphologically distinct.

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