A Survey of the Western Coastal Dune Lakes of the North Island, New Zealand

1953 ◽  
Vol 4 (2) ◽  
pp. 343 ◽  
Author(s):  
BT Cunningham ◽  
NT Moar ◽  
AW Torrie ◽  
PJ Parr
Keyword(s):  
Thermal Stratification ◽  
Bottom Fauna ◽  
Bathymetric Survey ◽  
Qualitative And Quantitative ◽  
Contour Maps ◽  
The North ◽  
Biological Survey ◽  
Submerged Aquatic Plants ◽  
Dune Lakes ◽  
Game Fish

A biological survey of 26 lakes of the western dune series of the North Island was made during the summers of 1949 and 1950. At each lake a shore-line and bathymetric survey was made and contour maps have been prepared. Temperature and transparency measurements were also taken. Analysis for essential chemicals, particularly oxygen, was made. Thermal stratification and deoxygenation of the hypolimnion was found in five lakes. Details of emergent and submerged aquatic plants have been included on the contour maps. Qualitative and quantitative samples were taken of plankton and bottom fauna. The present stocks of fish were examined and waterfowl were noted. All the lakes with an outlet supported eels. The Northland series contained no stocks of game fish, but in the Wellington series limited stocks of perch and trout occurred.

Temporal distribution and population structure of two congeneric species ofCucullanus(Nematoda: Cucullanidae) inOrthopristis ruberin Venezuela

2008 ◽  
Vol 82 (1) ◽  
pp. 69-76 ◽  
Author(s):  
A.K. Bashirullah ◽  
M.T. Diaz
Keyword(s):  
Temporal Distribution ◽  
Caribbean Sea ◽  
Congeneric Species ◽  
Mean Intensity ◽  
Qualitative And Quantitative ◽  
The North ◽  
Significant Difference ◽  
The Caribbean ◽  
Over Exploitation ◽  
Fish Hosts

AbstractThe qualitative and quantitative parameters of temporal distribution ofCucullanus tripapillatusandCucullanus chrysophrydesin the intestine ofOrthopristis ruberin the Caribbean Sea on the north of Margarita Island, Venezuela were analysed. A total of 540 fish were collected at random from the catch of commercial trawlers during 1982–83 and 1992–93. Both species ofCucullanuswere found throughout the year; prevalence and mean intensity ofC. tripapillatuswere higher than that ofC. chrysophrydes. A significant difference was found in infection between the two years of sampling. Female worms were more abundant than male in both years. Both species exhibited pronounced prevalence and maturity in September and March of each year, indicating seasonality. The patterns of occurrence of the two species ofCucullanusinO. ruberdid not change in the 10-year interval but the host size and number of parasites declined, which may be due to over-exploitation of definitive fish hosts.

Limnological Features of Cedar Lake, Manitoba

1965 ◽  
Vol 22 (5) ◽  
pp. 1123-1136
Author(s):  
D. W. Webb
Keyword(s):  
Thermal Stratification ◽  
River System ◽  
Dry Weight ◽  
Total Dissolved Solids ◽  
Mean Value ◽  
Total Alkalinity ◽  
Bottom Fauna ◽  
Chemical Factors ◽  
Main Basin ◽  
Physical And Chemical

Cedar Lake, largest lake in the Saskatchewan River system, was studied from June 14 until August 31, 1962. Twenty stations, located in the main basin of the lake, were examined during six sampling periods. These stations were located along five transects, at depths of 1.5, 3, 6, and 9 m. No thermal stratification occurred and the oxygen concentration never fell below 78% of air saturation. Total alkalinity and total dissolved solids averaged above 65 and 270 ppm, respectively.The average number of bottom organisms increased with depth, with the bulk of these being made up of spheariid clams, mayflies, chironomids, and gastropods. The number of genera also increased with depth. The standing crops determined for the six sampling periods ranged from 17.7 to 33.2 lb/acre (dry weight), with a mean value of 23.4 lb/acre. Correlations between the physical and chemical factors and the distribution of bottom fauna are examined and it is felt that the bottom type is the major factor affecting the distribution and abundance of bottom organisms in Cedar Lake. On the basis of the physical and chemical criteria, Cedar Lake may be classified as eutrophic.

Estimation of Site Dynamic Characteristics from Ambient Noise Measurements Using HVSR Method in Microzonation Study: Senggarang, Batu Pahat, Malaysia

2014 ◽  
Vol 931-932 ◽  
pp. 803-807 ◽  
Author(s):  
Ahmad Fahmy Kamarudin ◽  
Mohd Effendi Daud ◽  
Zainah Ibrahim ◽  
Ibrahim Azmi ◽  
Mohamad Khairani Yub ◽  
...  
Keyword(s):  
Dynamic Characteristics ◽  
Ambient Noise ◽  
Hazard Analysis ◽  
Resonance Effect ◽  
Spectral Ratio ◽  
Boundary Area ◽  
Contour Maps ◽  
The North ◽  
Hvsr Method ◽  
Noise Measurements

Site dynamic characteristics evaluation of fundamental ground frequency, Fo and amplification factor, Ao in Senggarang region were presented in 2D and 3D contour maps (microzonation maps) based on the ambient noise measurements carried out using Lennartz 1 Hz tri-axial seismometer sensors. Reliability of Fo and Ao determined from the ambient noise technique has become the main key components in seismic hazard analysis, resonance effect assessment, predictions of sedimentary layer and shear wave velocity, through cheaper, non-destructive and quick methodology. 73 points of ambient noise records were analyzed using Horizontal-to-Vertical Spectral Ratio (HVSR) method in the boundary area of 800 m x 800 m with the grid spacing of 100 m x 100 m. Significant peaks of mean HVSR curves were checked against the criterions proposed by the SESAME guideline. Slight difference of the Fo contours pattern between the North-South (NS) and the East-West (EW) directions was observed, but vice versa to the Ao contours between both directions. Significant peaks of Fo values were distributed from 1.61 to 6.35 Hz, whereas the Ao values were found from 3.18 to 9.39. Wide gap between the ranges of Fo and Ao in respective direction have shown to the variation of sediment thicknesses. Meanwhile, dominance shape of significant peak from the HVSR curves may indicate to a large velocity contrast presence underneath the ground surfaces.

The macrobenthos of the Beatrice Oilfield, Moray Firth, Scotland

1986 ◽  
Vol 91 ◽  
pp. 221-245
Author(s):  
J. P. Hartley ◽  
J. D. D. Bishop
Keyword(s):  
New Records ◽  
Benthic Communities ◽  
Fine Sand ◽  
Faunal Composition ◽  
Qualitative And Quantitative ◽  
The North ◽  
Moray Firth ◽  
Faunal Communities ◽  
The North Sea

SynopsisThe benthic ecology of the Beatrice Oilfield area is described from preproduction surveys carried out in 1977, 1980 and 1981. and from earlier published information. Variations in the water depth (from 33m to > 60 m) over the area were mirrored by sedimentary and faunal gradients. The sediments ranged from very fine, through fine to medium sands and were inhabited by faunal communities characterised by Thyasira flexuosa, Tellina fabula and Tellina pygmaea, respectively. Two fades of the fine sand community were noted, typified by the abundance of Thyasira flexuosa in muddier sediments and Crenella decussala in coarser deposits. Localised patches of shell gravel in which the fauna was characterised by reduced densities of Tellina fabula with elevated numbers of Scoloplos armiger and Lumbrineris gracilis occurred in medium depths. Examination of the faunal composition indicates that the Beatrice Oilfield lies at the interface between Glemarec's infralittoral and coastal étages.Comparison with earlier reports of the benthic communities of the area suggests a degree of long term persistence of the fauna in qualitative and quantitative terms. A list of all taxa found during the recent surveys is given; this includes a number of new records from the North Sea.

GEOLOGY AND GEOPHYSICS OF THE NORTH SNYDER AREA, SCURRY COUNTY, TEXAS

Geophysics ◽  
1951 ◽  
Vol 16 (1) ◽  
pp. 1-13 ◽  
Author(s):  
Neal Clayton
Keyword(s):  
Seismic Data ◽  
Oil Industry ◽  
Type A ◽  
Contour Maps ◽  
The North ◽  
West Texas

Discovery of the North Snyder reef in November, 1948 by the Standard of Texas focused the attention of the oil industry on this part of West Texas and presented the geophysicist with the problem of how to locate other reefs of this type. The North Snyder reef is unique in that reflected energy is obtained from the reef‐shale contact in some parts of the field. Magnetic, gravimetric and seismic data are presented to show some of the effects to be expected from a reef of this type. A number of electric log correlations are included in order to illustrate the geology of the field. From the electric logs it appears that the “draping” effect is small above the thick Pennsylvanian shale section which compensates for the reef mass. Contour maps for the base of the Coleman Junction limestone and the top of the Canyon reef are presented.

A review of the ecology of the deep-water pelagic fauna of the Rockall Trough

1986 ◽  
Vol 88 ◽  
pp. 145-157
Author(s):  
J. Mauchline
Keyword(s):  
Deep Water ◽  
Quantitative Description ◽  
Demersal Fish ◽  
Historical Account ◽  
Production Rates ◽  
Qualitative And Quantitative ◽  
The North ◽  
Rockall Trough

SynopsisA brief historical account of the early faunal investigations is given. Modern studies concentrate on qualitative and quantitative description and interpretation of the processes taking place within the Rockall Trough. Demographic analyses are feasible on a variety of species allowing estimation of growth and production rates. The pelagic fauna impinges on the benthopelagic environments of the slope regions of the Trough. There it is predated by populations of demersal fish. Advection of fauna takes place to the north and northeast, probably primarily in the slope current.

All aboard! A biological survey of ballast water onboard vessels spanning the North Atlantic Ocean

2014 ◽  
Vol 87 (1-2) ◽  
pp. 201-210 ◽  
Author(s):  
Jamie L. Steichen ◽  
Anja Schulze ◽  
Robin Brinkmeyer ◽  
Antonietta Quigg
Keyword(s):  
Atlantic Ocean ◽  
North Atlantic ◽  
Ballast Water ◽  
North Atlantic Ocean ◽  
The North ◽  
Biological Survey ◽  
The North Atlantic

scholarly journals The spatial variability of qualitative and quantitative structure of planktonic protist communities in the North Atlantic Current (the Nordic Seas)

2018 ◽  
Author(s):  
Anna M Kubiszyn ◽  
Józef Wiktor ◽  
Małgorzata Merchel ◽  
Józef Wiktor
Keyword(s):  
Community Structure ◽  
Spatial Variability ◽  
Euphotic Zone ◽  
North Atlantic Current ◽  
Nordic Seas ◽  
Qualitative And Quantitative ◽  
Trapezoidal Formula ◽  
The North ◽  
Frontal Zones ◽  
Second Peak

We investigated the spatial variability of qualitative and quantitative planktonic protist community structure in the Nordic Seas in relation to the environmental factors. Our study was conducted in the summers of 2015 and 2016 during cruises of the Institute of Oceanology PAS to the Norwegian and Greenland Seas. The samples were collected using Niskin bottles from the constant depths covering the euphotic zone (5 m, 15 m, 25 m, 35 m, 50 m) and then integrated, using trapezoidal formula, to represent protist community structure under the square meter of the water column, and fixed with an acidic Lugol's solution and, after 24hs, with a glutaraldehyde (both to a final concentration of 2%). Samples were analysed according to the Utermöhl method. The lack of a clear variability in the longitudinal-latitudinal qualitative protist community distribution was accompanied by the absence of distinct differences in the hydrography of the area. The highest total protist abundance was observed in the areas between 70-72 ºN and 74-76 ºN. The first more southerly-located peak was related to the presence of Bacillariophyceae, which numbers decreased northward, whereas the second peak was likely an effect of the increase in protist cells concentration in the frontal zones. In the longitudinal aspect, the eastward increase in Bacillariophyceae abundance was associated with the decrease in the other protist taxa. The observed communities were represented by four distinct types, distributed without any evident pattern: composed solely of Bacillariophyceae (1), Flagellates (2), Prymnesiophyceae (3) and a mixture of flagellates (Dinophyceae, Cryptophyceae) and Bacillariophyceae (4). Although our investigation seems to exclude the longitudinal-latitudinal protist zonation in the area, a further protist study under different hydrographic conditions is needed to confirm it.

scholarly journals Faktor-faktor Penghambat Pembangunan Rumah Layak Huni Untuk Kaum Dhuafa di Provinsi Aceh (Study Kasus: Kabupaten Aceh Utara)

2018 ◽  
Vol 1 (4) ◽  
pp. 119-129
Author(s):  
Mustafaruddin Mustafaruddin ◽  
Mochammad Afifuddin ◽  
Abdul Munir
Keyword(s):  
Research Method ◽  
Quantitative Method ◽  
Condition Factor ◽  
Qualitative And Quantitative ◽  
The North ◽  
House Construction ◽  
Home Construction ◽  
Construction Activity ◽  
Material Factor

The habitable home construction activity is the North Aceh Regency Government program dedicated to the Dhuafa people. The implementation of the project is submitted to the contractor as responsible for completing the construction of a habitable home. Each planned project must have an implementation plan, when the start and end of the project, on-site technical and resource provision is essential to avoid the risk of obstacles in the implementation of the project. Problems that arise in the field are very risky and should be avoided so that the project being done can run smoothly. The purpose of this research is to identify the factors of inhibition in the implementation of habitable home project for the Dhuafa as well as to analyze a good strategy in minimizing the inhibition. The research method used is mix methode between qualitative and quantitative method. The number of executors of Dhuafa house construction in 2016 is 64 companies. The number of respondents obtained from the slovin formula of 39 companies. The results of the research explain that the factors causing the occurrence of obstacles during the execution of work is the labor factor with the value of frequency index (FI) of 0,84; design and planning factors with an FI value of 0,81; factor of equipment with value of FI 0,77; factors beyond the contractor's ability with a FI value of 0,75; material factor with value of FI 0,55; field condition factor with FI value of 0,46; and implementation factor and working relationship with FI value of 0,40. The ways that can be done to avoid the occurrence of barriers in terms of labor is to improve the quality of labor, increase the workforce who are competent in their fields, and work in accordance with the procedure. In terms of design and planning is to do a design review of the project.

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