Influence of pit-trap design on sampling of reptiles in arid spinifex grasslands

1994 ◽  
Vol 21 (5) ◽  
pp. 483 ◽  
Author(s):  
TJ Hobbs ◽  
SR Morton ◽  
P Masters ◽  
KR Jones
Keyword(s):  
Trap Design ◽  
Drift Fence ◽  
Straight Line ◽  
Central Australia ◽  
Effective Design

Eight different pit-trap designs were compared to determine the most effective design for capturing reptiles in arid spinifex grasslands of central Australia. Results from seven surveys within two studies showed that more complicated designs with cross fences did not significantly increase trapping success. A simple straight line of pit-traps and drift fence with buckets approximately 7 m apart is the most effective design and is recommended for sampling reptiles in arid Australia.

A funnel trap for capture of small arboreal reptiles

2008 ◽  
Vol 29 (3) ◽  
pp. 413-423 ◽  
Author(s):  
Giles Hardy ◽  
Patricia Fleming ◽  
Michael Craig ◽  
Christine Davis ◽  
Andrew Grigg
Keyword(s):  
Acoustic Cues ◽  
Critical Factors ◽  
Transparent Material ◽  
Trap Design ◽  
Drift Fence ◽  
Funnel Trap

Abstract Small arboreal reptiles can be difficult to capture, except in traps, and the physical trap characteristics, drift-fence and bait are critical factors that can influence the efficacy of any trap. We conducted experiments on marbled geckoes (Christinus marmoratus, Gekkonidae) and wall skinks (Cryptoblepharus plagiocephalus, Scincidae) that examined bait preferences, attractiveness of different visual and acoustic cues and efficacy of different drift-fence materials to develop a trap for small arboreal reptiles. The experiments showed that both marbled geckos and wall skinks preferred crickets as bait, that wall skinks avoided darkness/cover and that both species had difficulty climbing flashing material covered in oil. This led us to develop an arboreal trap that was made from transparent material, used crickets as bait and had drift-fences constructed from flashing material. When used in the field, the final trap design was effective in capturing arboreal reptiles.

scholarly journals THE DIVERSITY OF AMPHIBIANS IN CAMPUS AREA OF SRIWIJAYA UNIVERSITY INDRALAYA, OGAN ILIR, SOUTH SUMATERA

2015 ◽  
Vol 1 (1) ◽  
Author(s):  
Catur Yuono Prasetyo ◽  
Indra Yustian ◽  
Doni Setiawan
Keyword(s):  
Data Collection ◽  
Diversity Index ◽  
Amphibian Species ◽  
Line Method ◽  
Transect Line ◽  
Contour Lines ◽  
Drift Fence ◽  
Straight Line ◽  
On Line ◽  
Straight Line Method

The study is diversity of amphibians in campus area of sriwijaya university indralaya, ogan ilir, south sumatra was aimed to determine the diversity of amphibian species present in this area. The research has been done in March until May 2015, in the campus of the Sriwijaya University, Indralaya. The method in this study is use the transect method by placing seventh transect line on line with the direction of cutting contour lines. Data collection techniques using the Visual Encounter Survey (VES) and Pit-Fall Trap method in combination with the Straight Line Method and Fence (Drift Fence). Results from this study recorded 11 species of amphibians from five families of the Anura. Average diversity index at Sriwijaya University Indralaya region is 1.70 which fall into the medium category. Keywords : Sriwijaya university, amphibians, transect,diversity

scholarly journals THE DIVERSITY OF REPTILES ON SEVERAL HABITAT TYPES IN CAMPUS AREA OF SRIWIJAYA UNIVERSITY INDRALAYA, OGAN ILIR

2015 ◽  
Vol 1 (1) ◽  
Author(s):  
Wenny Saptalisa ◽  
Indra Yustian ◽  
Arum Setiawan
Keyword(s):  
Data Collection ◽  
Diversity Index ◽  
Habitat Types ◽  
Amphibian Species ◽  
Transect Line ◽  
Contour Lines ◽  
Drift Fence ◽  
Straight Line ◽  
On Line ◽  
Straight Line Method

The Diversity of Reptiles on Several Habitat Types  in Campus Area of Sriwijaya University Indralaya, Ogan Ilir was aimed to determine the diversity of amphibian species present in this area. The research has been done in March until May 2015, in the campus of the Sriwijaya University, Indralaya. The method in this study is use the transect method by placing seventh transect line on line with the direction of cutting contour lines. Data collection techniques using the Visual Encounter Survey (VES) and Pit-Fall Trap method in combination with the Straight Line Method and Fence (Drift Fence). Results from this study recorded 11 species of amphibians from five families of the Anura Order. Average diversity index at Sriwijaya University Indralaya region is 1.70 which fall into the medium category. Keywords : Sriwijaya university, amphibians, transect,diversity

Microdensitometer—computer correlation analysis of ultrastructural periodicity

1978 ◽  
Vol 36 (2) ◽  
pp. 32-33
Author(s):  
D.R. Ensor ◽  
C.G. Jensen ◽  
J.A. Fillery ◽  
R.J.K. Baker
Keyword(s):  
Correlation Analysis ◽  
Background Noise ◽  
Computer Control ◽  
Optical Diffraction ◽  
Screw Thread ◽  
Straight Line ◽  
Computer Storage ◽  
Correlation Process ◽  
Electron Microscope Image ◽  
Fixed Beam

Because periodicity is a major indicator of structural organisation numerous methods have been devised to demonstrate periodicity masked by background “noise” in the electron microscope image (e.g. photographic image reinforcement, Markham et al, 1964; optical diffraction techniques, Horne, 1977; McIntosh,1974). Computer correlation analysis of a densitometer tracing provides another means of minimising "noise". The correlation process uncovers periodic information by cancelling random elements. The technique is easily executed, the results are readily interpreted and the computer removes tedium, lends accuracy and assists in impartiality.A scanning densitometer was adapted to allow computer control of the scan and to give direct computer storage of the data. A photographic transparency of the image to be scanned is mounted on a stage coupled directly to an accurate screw thread driven by a stepping motor. The stage is moved so that the fixed beam of the densitometer (which is directed normal to the transparency) traces a straight line along the structure of interest in the image.

Freeze fracture imaging and computer simulation of liposome structure: Membrane geometry and defects

1983 ◽  
Vol 41 ◽  
pp. 646-647
Author(s):  
Joseph A. Zasadzinski
Keyword(s):  
Liquid Crystalline ◽  
Freeze Fracture ◽  
Continuum Theory ◽  
Closed Surfaces ◽  
Straight Line ◽  
Low Weight ◽  
Concentric Spheres ◽  
Membrane Geometry ◽  
Dupin Cyclides ◽  
Limiting Case

At low weight fractions, many surfactant and biological amphiphiles form dispersions of lamellar liquid crystalline liposomes in water. Amphiphile molecules tend to align themselves in parallel bilayers which are free to bend. Bilayers must form closed surfaces to separate hydrophobic and hydrophilic domains completely. Continuum theory of liquid crystals requires that the constant spacing of bilayer surfaces be maintained except at singularities of no more than line extent. Maxwell demonstrated that only two types of closed surfaces can satisfy this constraint: concentric spheres and Dupin cyclides. Dupin cyclides (Figure 1) are parallel closed surfaces which have a conjugate ellipse (r1) and hyperbola (r2) as singularities in the bilayer spacing. Any straight line drawn from a point on the ellipse to a point on the hyperbola is normal to every surface it intersects (broken lines in Figure 1). A simple example, and limiting case, is a family of concentric tori (Figure 1b).To distinguish between the allowable arrangements, freeze fracture TEM micrographs of representative biological (L-α phosphotidylcholine: L-α PC) and surfactant (sodium heptylnonyl benzenesulfonate: SHBS)liposomes are compared to mathematically derived sections of Dupin cyclides and concentric spheres.

Human Enamel Replication

1976 ◽  
Vol 34 ◽  
pp. 180-181
Author(s):  
Norman L. Dockum ◽  
John G. Dockum
Keyword(s):  
Organic Matrix ◽  
Human Teeth ◽  
Human Enamel ◽  
Straight Line ◽  
Ultrastructural Characteristics

Ultrastructural characteristics of fractured human enamel and acid-etched enamel were compared using acetate replicas shadowed with platinum and palladium. Shadowed replications of acid-etched surfaces were also obtained by the same method.Enamel from human teeth has a rod structure within which there are crystals of hydroxyapatite contained within a structureless organic matrix composed of keratin. The rods which run at right angles from the dentino-enamel junction are considered to run in a straight line perpendicular to the perimeter of the enamel, however, in many areas these enamel rods overlap, interlacing and intertwining with one another.

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