A Further Ecological Study of Calcareous Streams in the `Black Mountain' District of South Wales

10.2307/1596 ◽  
1949 ◽  
Vol 18 (2) ◽  
pp. 142 ◽  
Author(s):  
J. R. Erichsen Jones
Keyword(s):  
Ecological Study ◽  
South Wales ◽  
Calcareous Streams ◽  
Black Mountain

The Inpact of River Discharge on Distribution and Production of the School Prawn Metapenaeus macleayi (Haswell) (Crustacea : Penaeidae) in the Clarence River Region, Northern New South Wales

1978 ◽  
Vol 29 (3) ◽  
pp. 311 ◽  
Author(s):  
JP Glaister
Keyword(s):  
River Discharge ◽  
Ecological Study ◽  
New South ◽  
Total Production ◽  
Catch Per Unit Effort ◽  
Lunar Periodicity ◽  
South Wales ◽  
River Region ◽  
Schooling Behaviour ◽  
The Difference

Relationships between river discharge and production (catch) of the school prawn M. macleayi were examined as part of an ecological study of this species in the Clarence River region. Schooling behaviour of juvenile M. macleayi exhibited a lunar periodicity and mean daily abundance peaked 5 days after full moon. This was followed 7 days later by a peak in mean daily abundance of emigrating juvenile M. macleayi. Fluctuations in the magnitude of the oceanic component of the total annual catch were found to determine the difference between high and low production seasons. During the period examined there was a direct relationship between Clarence River discharge and the oceanic component of total production of M. macleayi, for various time periods. The absence of a persistent trend in total annual production and annual catch per unit effort of M. macleayi in the Clarence River region suggests that the stock has not been overfished. Common peaks in mean monthly oceanic production of M. macleayi off the Clarence, Evans and Richmond Rivers suggest a common enhancement of the seasonal emigration of M. macleayi from the three estuaries in November due to increased river discharges. Successive troughs and peaks in mean monthly oceanic production suggest a northwards migration of M. macleayi from the Clarence and Evans Rivers and subsequent recruitment to the Evans and Richmond ocean fisheries respectively. Results indicate the importance of river discharge to production of M. macleayi and suggest that modification of discharges by restriction of freshwater flow could adversely effect production.

scholarly journals An objective index of walkability for research and planning in the Sydney Metropolitan Region of New South Wales, Australia: an ecological study

2013 ◽  
Vol 12 (1) ◽  
pp. 61 ◽  
Author(s):  
Darren J Mayne ◽  
Geoffrey G Morgan ◽  
Alan Willmore ◽  
Nectarios Rose ◽  
Bin Jalaludin ◽  
...  
Keyword(s):  
Ecological Study ◽  
New South ◽  
New South Wales ◽  
Metropolitan Region ◽  
South Wales

scholarly journals A Study of Certain Aspects of the Ecology of the Inter-Tidal Zone of the New South Wales Coast

1948 ◽  
Vol 1 (2) ◽  
pp. 176 ◽  
Author(s):  
WJ Dakin ◽  
IsobeI Benneti ◽  
Elizabeth Pope
Keyword(s):  
Ecological Study ◽  
New South ◽  
New South Wales ◽  
Systematic Investigation ◽  
Entire Length ◽  
Tidal Zone ◽  
South Wales

This paper is the result of an ecological study pursued for several years and extending over the entire length of the New South Wales coast. It is not a systematic investigation of one limited locality, but an attempt to analyse basically a long stretch of the east Australian coast.

Persistent Places in the Mesolithic Landscape: an Example from the Black Mountain Uplands of South Wales

1995 ◽  
Vol 61 ◽  
pp. 81-116 ◽  
Author(s):  
R.N.E. Barton ◽  
P.J. Berridge ◽  
M.J.C. Walker ◽  
R.E. Bevins
Keyword(s):  
Lake Basin ◽  
Site Location ◽  
Long Distance ◽  
Hunter Gatherers ◽  
Mountain Ranges ◽  
Long Distance Transport ◽  
South Wales ◽  
Long Time ◽  
The Relationship ◽  
Black Mountain

Evidence for the early Postglacial use of upland environments in the Mesolithic in various parts Britain has been known for a long time. However, until relatively recently such evidence had been remarkably absent from upland south Wales, which includes some of the highest mountain ranges in southern Britain. In this paper we report on new work at the upland location of Waun Fignen Felen which consists of discrete Early and later Mesolithic artefact scatters on the edge of a former lake basin. In describing this example, we focus on the timing of Mesolithic movements into the interior uplands and examine the relationship between humans and the landscape, particularly in respect to the long distance transport of materials and factors likely to have influenced the choice of site location. Some comparative observations are made on the use and perception of landscapes by ethnographic hunter-gatherers.

β-Mannosidosis: Myelin and oligodendrocyte lesions in brain and spinal cord

1984 ◽  
Vol 42 ◽  
pp. 694-695
Author(s):  
Kathryn L. Lovell ◽  
Margaret Z. Jones
Keyword(s):  
Spinal Cord ◽  
Nervous System ◽  
Genetic Disorder ◽  
Neurological Deficits ◽  
Axonal Spheroids ◽  
South Wales ◽  
Pendular Nystagmus ◽  
Myelin Deficits ◽  
Recessive Defect ◽  
Brain And Spinal Cord

Caprine β-mannosidosis, an autosomal recessive defect of glycoprotein catabolism, is associated with a deficiency of tissue and plasma -mannosidase and with tissue accumulation and urinary excretion of oligosaccharides, including the trisaccharide Man(β1-4)GlcNAc(βl-4)GlcNAc and the disaccharide Man(β1-4)GlcNAc. This genetic disorder is evident at birth, with severe neurological deficits including a marked intention tremor, pendular nystagmus, ataxia and inability to stand. Major pathological characteristics described in Nubian goats in Michigan and in Anglo-Nubian goats in New South Wales include widespread cytoplasmic vacuolation in the nervous system and viscera, axonal spheroids, and severe myelin paucity in the brain but not spinal cord or peripheral nerves. Light microscopic examination revealed marked regional variation in the severity of central nervous system myelin deficits, with some brain areas showing nearly complete absence of myelin and other regions characterized by the presence of 25-50% of the control number of myelin sheaths.

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