Taxonomic Implications of Variation in Sperm Head Morphology of the Australian Delicate Mouse, Pseudomys delicatulus.

1999 ◽  
Vol 21 (2) ◽  
pp. 193
Author(s):  
W.R. Breed
Keyword(s):  
Cryptic Species ◽  
Western Australia ◽  
Northern Territory ◽  
Sperm Head ◽  
The Other ◽  
North Coast ◽  
Sperm Tail ◽  
The North ◽  
Taxonomic Implications ◽  
Head Morphology

The structural organisation of the sperm head of individuals included within the species Pseudomys delicatulus, and P. patrius, which has recently been separated from P. delicatulus, is detailed here. P. patrius has a sperm type with three hooks - a feature shared with most other species of Pseudomys including all three other pebble-mound mice. By contrast, P. delicatulus has a very different sperm type that lacks the three hooks and in this species two morphotypes appear to be present. One is highly variable, generally pear-shaped with a basal attachment of the sperm tail, and is present in individuals which occur on the mainland of the Northern Territory and Western Australia. The other, which is present in individuals in Queensland and on West Island and Groote Eylandt off the north coast of Northern Territory, is bilaterally flattened with a single, attenuated, blunt apical hook and tail attached to the lower concave surface. These results (1) support the recent separation of P. patrius from P. delicatulus and, (2) suggest the presence of a cryptic species or subspecies within Pseudomys delicatulus as presently constituted.

A levee breach induced by internal erosion in Western Australia.

2021 ◽  
pp. qjegh2021-037
Author(s):  
Scott Davidson ◽  
Paul Baker
Keyword(s):  
Western Australia ◽  
Internal Erosion ◽  
North Coast ◽  
Sandy Gravel ◽  
Content Type ◽  
The North ◽  
Levee Breach ◽  
Piping Erosion ◽  
A Site

This case study presents a levee breach induced by piping erosion under cyclonic conditions in 2019. The levee is a 2.5 m high, 500 m long, mass earth fill embankment; with no cut-off trench, core, or ancillary structures. Located near Port Hedland on the north coast of Western Australia; its purpose is diversionary, to redirect cyclonic surface water away from the nearby Great Northern Highway. The levee was founded directly on Alluvium in 1987; and formed of locally sourced clayey sandy gravel. In 2003, the levee was partially excavated to enable the placement of a buried pipeline through the levee.Following a cyclonic event in 2019, a 27 m length of the levee breached, resulting in significant scour of the foundation and downstream soil. A site visit and investigation were conducted shortly thereafter, where in situ testing and laboratory soil tests on the levee and foundation materials were conducted.Analysis of the site observations and laboratory testing data led to the probable failure mechanism being theorised as having been initiated within the foundation by piping erosion within sand-rich beds of Alluvium. The large quantity of water ponding upstream of the levee then caused a progressive washout and breach of the levee.Thematic collection: This article is part of the Role of water in destabilizing slopes collection available at: https://www.lyellcollection.org/cc/Role-of-water-in-destabilizing-slopes

The Genus Geckomima (Orthoptera: Eumastacidae: Morabinae)

1982 ◽  
Vol 30 (6) ◽  
pp. 931 ◽  
Author(s):  
KHL Key ◽  
appendix by DH Colless
Keyword(s):  
Western Australia ◽  
Northern Territory ◽  
The North ◽  
Northern Half ◽  
Nearest Neighbours

The known species of the genus Geckomima, a relatively robust, subarboreal member of the norabine grasshopper tribe Warramungini, are described, keyed, and their relationships discussed. Twelve species, brevicornis, lesueuri, handschini, brevirostris, gecko, drysdaleana, yampi, tindalei, pilbara, leopoldana, nepos, and arnhemana, are recognized (the last seven new) and two races within arnhemana. The genus is restricted to the Northern Territory and the northern half of Western Australia. G. handschini has an extensive distribution in the drier parts of the Northern Territory and adjacent Western Australia, while the remaining species occupy smaller areas to the north and west. All species are ostensibly allopatric, but all are probably in fact parapatric with their nearest neighbours.

Talitrid amphipods from ocean beaches along the New South Wales coast of Australia (Amphipoda, Talitridae)

Zootaxa ◽  
2012 ◽  
Vol 3575 (1) ◽  
pp. 1 ◽  
Author(s):  
J. K. LOWRY
Keyword(s):  
Western Australia ◽  
New Genus ◽  
New South ◽  
New South Wales ◽  
Original Description ◽  
North Coast ◽  
The South ◽  
Shark Bay ◽  
The North ◽  
South Wales

The sand-hopper Bellorchestia mariae sp. nov. is described from Honeymoon Bay on the north coast of Jervis Bay, NewSouth Wales, Australia. It is the sister species of B. richardsoni Serejo & Lowry, 2008 and appears to have a limited dis-tribution from about Narrawallee in the south to northern Jervis Bay. The distribution of B. richardsoni Serejo & Lowry,2008 is extended from Point Ricardo, Victoria, northwards to Ulladulla on the New South Wales coast. A new synonymyis proposed for the sand-hopper Notorchestia quadrimana (Dana, 1852) which includes N. novaehollandiae (1899) andN. lobata Serejo & Lowry, 2008. It is considered to be a wide-ranging species from Shark Bay in Western Australia aroundthe south coast to at least Maitland Bay in central New South Wales. The beach-hopper Orchestia dispar Dana, 1852 isdescribed from Valla Beach in northern New South Wales and moved to the new genus Vallorchestia. This is the first re-cord of V. dispar since its original description 160 years ago. The beach-hopper Platorchestia smithi sp. nov. is describedfrom Brooms Head, New South Wales, Australia. It is common on ocean beaches from Bendalong in the south to Ballina in northern New South Wales. South of Bendalong beach-hoppers on ocean beaches appear to be absent.

Early Watertable Farming on the North Coast of Peru

1979 ◽  
Vol 44 (1) ◽  
pp. 138-144 ◽  
Author(s):  
Michael West
Keyword(s):  
The Other ◽  
North Coast ◽  
Intermediate Period ◽  
The North ◽  
Early Intermediate Period ◽  
Northern Peru ◽  
Field Systems ◽  
North Coast Of Peru

An archaeological example of simple watertable farming dating to the beginning of the Early Intermediate period in the Viru Valley, northern Peru, is reported. This technique was deployed by functionally differentiated segments of a single community, one stressing fishing and the other farming. Analyses of pollens indicate that Zea, Leguminosae, and Solonaceae were grown in two separate field systems.

scholarly journals Inheritance of Tail Colour and White-spotting in Conilurus penicillatus (Muridae)

1988 ◽  
Vol 41 (4) ◽  
pp. 489
Author(s):  
Catherine M Kemper ◽  
Lincoln H Schmitt
Keyword(s):  
Western Australia ◽  
Small Proportion ◽  
The Other ◽  
Pedigree Data ◽  
The Past ◽  
The North ◽  
Laboratory Colony ◽  
In The Wild ◽  
Mendelian Character ◽  
Colour Morphs

In the wild, Coni/urus penicillatus has two tail colour morphs, one entirely black and the other with a white distal brush of variable length. These colour morphs have been used in the past for taxonomic purposes. A small proportion (4'6%) of laboratory-reared animals have a white interstitial section. Pedigree data were collected from a laboratory colony (n = 173) established using seven wild-caught animals from the north Kimberley region, Western Australia. The hypothesis tested was that black tail is inherited as a Mendelian character recessive to white tip. Matings between black-tailed individuals always gave black offspring. Crosses between other colour morphs also supported this hypothesis.

Mistletoe flora (Loranthaceae and Santalaceae) of the Kimberley, a tropical region in Western Australia, with particular reference to fire

2013 ◽  
Vol 61 (4) ◽  
pp. 309 ◽  
Author(s):  
A. N. Start
Keyword(s):  
Western Australia ◽  
Northern Territory ◽  
Tropical Region ◽  
The North

The mistletoe flora of the tropical Kimberley region of Western Australia was studied over a 30-year period, with a particular emphasis on distributions, use of hosts and effects of fire. The results were compared with those of a similar study undertaken in the Pilbara, a more arid tropical region in the same State. The flora consisted of one genus with three species in the Santalaceae and five genera with 22 species (one with two varieties) in the Loranthaceae. Amyema was the largest genus in both regions. Four species are regarded as Kimberley endemics but two of them may also occur in the Northern Territory. Most species occurred in three or more of five Kimberley bioregions. However, six species were recorded only from the North Kimberley where they were all rare. Host records included 165 species from 33 families. Fabaceae (particularly Acacia) and Myrtaceae (particularly Eucalyptus and Corymbia) were the most important. The perfect dichotomy between species using fabaceous and myrtaceous hosts in the Pilbara was strong but imperfect in the Kimberley. Fire responses of two species were not observed. Two (perhaps three) taxa were able to resprout, whereas the remaining taxa were killed if scorched. Most species occurred, at least occasionally, in relatively fire-safe refugia. Nevertheless, fire is eroding distributions of many species and may be threatening some, particularly the rare North Kimberley species.

The influence of landforms on sandalwood (Santalum spicatum (R.Br) A.Dc.) size structure and density in the north-eastern goldfields, Western Australia

2002 ◽  
Vol 24 (2) ◽  
pp. 219 ◽  
Author(s):  
J. E. Brand ◽  
P. J. Jones
Keyword(s):  
Western Australia ◽  
Land Surface ◽  
Size Structure ◽  
The Other ◽  
Total Density ◽  
Surface Type ◽  
The North ◽  
North Eastern ◽  
Land Systems ◽  
Santalum Spicatum

The density of Santalum spicatum was compared between 'land systems' and between 'land surface types' on four sheep stations in the north-eastern Goldfields: Yakabindie, Tarmoola, Glenorn and Minara. S.A spicatum density was recorded in 4–6A ha transect plots, with a total of 14,090 ha surveyed. Within each transect plot, the S. spicatum were divided into five groups based on stem diameter at 150A mm: < 25 mm, 25–74 mm, 75–124 mm, 125–174 mm and > 174 mm. The proportion of S. spicatum in each of the five size categories was similar between land surface types and between land systems, with the majority in two groups: 75–124 mm and 125–174 mm. S. spicatum recruitment was low, with less than 1.5 % seedlings (< 25 mm) and 7.9 % saplings (25–74 mm). Total density of S. spicatum on hills and ridges (0.65 stems/ha) was significantly higher than any other land surface type. The sandplains (0.05 stems/ha) supported the least. Within land systems, Laverton and Bevon (both hills and ridges) had the highest S. spicatum density. Yakabindie supported higher densities of S. spicatum than the other stations.

XVI. Magnetical observations made in the West Indies, on North Coast of Brazil and North America, in the years 1834, 1835, 1836, and 1837, by Captain Sir Everard Home, Bart. R. N. F. R. S. Reduced by the Rev. George Fisher, M. A. F. R. S

1838 ◽  
Vol 128 ◽  
pp. 343-349
Keyword(s):  
West Indies ◽  
The Other ◽  
North Coast ◽  
The West ◽  
Magnetic Forces ◽  
The North ◽  
Before And After ◽  
The Face ◽  
The Times ◽  
Made In

It was the object in the experiments recorded in this paper, to determine the relative magnetic forces soliciting both the dipping, and horizontal needles, by observing the times of their completing a given number of vibrations at the various places visited during a period of three years, on the North American and West India Station, in Her Majesty’s Ship Racehorse. The dipping instrument used was one of modern construction by Dollond. Each observation for the dip consisted of an equal number of readings of the positions of the needle, with the face of the instrument east and west, before and after the inversion of the poles, and a mean of all the readings taken for the true dip. The instrument had two needles fitted to it, one of which being used solely for the purpose of observing its vibrations, its magnetism was therefore never interfered with, and this needle in this paper is distinguished by the letter B. The other needle was kept for the purpose of determining the dip, and the results obtained with it are given in Table I.

scholarly journals On the Bennelongia nimala and B. triangulata lineages (Crustacea, Ostracoda) in Western Australia, with the description of six new species

2015 ◽  
Author(s):  
Koen Martens ◽  
Stuart Halse ◽  
Isa Schön
Keyword(s):  
New Species ◽  
New Zealand ◽  
Cryptic Species ◽  
Western Australia ◽  
Common Species ◽  
Northern Territory ◽  
Nominal Species ◽  
Cryptic Diversity ◽  
Molecular Phylogenies ◽  
Coi Sequences

The ostracod genus Bennelongia De Deckker & McKenzie, 1981 occurs in Australia and New Zealand. We redescribe B. nimala from the Northern Territory and describe six new species from Western Australia belonging to the B. nimala (five species) and B. triangulata sp. nov. (one species) lineages: B. tirigie sp. nov., B. koendersae sp. nov., B. pinderi sp. nov., B. muggon sp. nov., B. shieli sp. nov. and B. triangulata sp. nov. For six of these seven species, we could construct molecular phylogenies and parsimonious networks based on COI sequences. We tested for specific status and for potential cryptic diversity of clades with Birky’s 4 theta rule. The analyses support the existence of these six species and the absence of cryptic species in these lineages. Bennelongia triangulata sp. nov. is a common species in the turbid claypans of the Murchison/ Gascoyne region. Bennelongia nimala itself is thus far known only from the Northern Territory. Bennelongia tirigie sp. nov., B. pinderi sp. nov. and B. muggon sp. nov. occur in the Murchison/ Gascoyne region, whereas B. koendersae sp. nov. and B. shieli sp. nov. are described from the Pilbara. With the six new species described here, the genus Bennelongia now comprises 31 nominal species.

scholarly journals Current (2021) status of surimi industry in Indonesia and possible solutions: A review

2021 ◽  
Vol 919 (1) ◽  
pp. 012036
Author(s):  
Sihono ◽  
A H Purnomo ◽  
S Wibowo ◽  
F R Dewi
Keyword(s):  
National Economy ◽  
Raw Materials ◽  
Pelagic Fish ◽  
The Other ◽  
Raw Material ◽  
North Coast ◽  
Medium Size ◽  
Market Demand ◽  
Small Pelagic Fish ◽  
The North

Abstract The surimi industry in Indonesia, especially located on the North Coast Java, has an important role in boosting both regional and national economy. In the last 5 years, the surimi industry has been affected by the policy of prohibiting the use of destructive seine and trawl nets, known locally as cantrang. Most of the surimi industry in Indonesia use bycatches and discards of cantrang as raw material. On the other hand, the policy drives the opportunity to use the aquaculture fishes and non cantrang catches as a raw materials substitution of the surimi. Many laboratory scale observations have shown that aquaculture and small pelagic fish can be used as the raw material for surimi. However, the information around using several species of fish (multi-species) as raw material of surimi is not well provided. Therefore, the purpose of this study was to generate the recommendations regarding the use of multi-species fish as an alternative raw material for the surimi industry to replace the bycatches of cantrang. The information will allow industry both small and medium size to have a better option that suits their need to be able to fulfill the market demand.

Sign in / Sign up

Export Citation Format

Share Document