How can blind tiger snakes (Notechis scutatus) forage successfully?

2005 ◽  
Vol 53 (5) ◽  
pp. 283
Author(s):  
Fabien Aubret ◽  
Xavier Bonnet ◽  
David Pearson ◽  
Richard Shine
Keyword(s):  
Western Australia ◽  
Fast Moving ◽  
Field Data ◽  
Great Difficulty ◽  
Small Island ◽  
Surprising Result ◽  
Laboratory Studies ◽  
Data Support ◽  
Alternative Hypotheses ◽  
Insular Ecosystem

On a small island off south-western Australia, tiger snakes (Notechis scutatus, Elapidae) continue to survive, feed, grow and reproduce successfully after being blinded by seagulls defending their chicks. We propose two alternative hypotheses to explain this surprising result: either vision is of trivial importance in tiger snake foraging, or the blinded snakes survive on a diet of abundant immobile prey that cannot escape their approach. Laboratory studies in which we blindfolded snakes falsified the first hypothesis: snakes that were unable to see had great difficulty in capturing mobile prey. Field data support the second hypothesis: blind snakes feed almost entirely on seagull chicks, whereas normal-sighted animals also took fast-moving prey (lizards and mice). Thus, the ability of tiger snakes on Carnac Island to survive without vision is attributable to the availability of abundant helpless prey (seagull chicks) in this insular ecosystem.

Porcellio spinicornis Say (Isopoda) demography. II. A comparison between field and laboratory data

1976 ◽  
Vol 54 (6) ◽  
pp. 825-842 ◽  
Author(s):  
Donald J. McQueen
Keyword(s):  
Field Data ◽  
Laboratory Data ◽  
Field Population ◽  
Laboratory Studies ◽  
The Third ◽  
Terrestrial Isopod ◽  
Independent Laboratory ◽  
Demographic Study ◽  
June July ◽  
Rates Of Growth

Field data from a demographic study of the terrestrial isopod Porcellio spinicornis Say were analyzed and compared with laboratory data reported by McQueen and Carnio. On the study area, which covered 482.8 m2, it was observed that reproduction began when average temperatures were > 13 °C, and that about 86% of the individuals produced one brood and about 30% produced two broods. During 1972, 25 654 offspring were produced and during 1973, 27 664 offspring resulted from reproduction, which took place during May, June, July, and August. By October of both years, these animals attained sizes ranging from 10 to 30 mg and exhibited 42 to 47% survivorship. During the next summer, females grew to between 30 and 50 mg and males to between 20 and 40 mg, and survivorship ranged from 15% in May to 2% in August. During the third summer, females attained sizes ranging from 80 to 100 mg and males from 40 to 70 mg. Survivorship during this period ranged from 1% in May to 0% in August. All rates of growth, reproduction, and survival, as well as reproductive periodicity, agreed with independent laboratory studies conducted under controlled conditions. During the 3 years studied the field population remained relatively constant and appeared to be limited by temperature conditions.

Geology and petrochemistry of lower Aphebian (2.4–2.0 Ga) alkaline plutonic and hypabyssal rocks in the East Arm of Great Slave Lake, Northwest Territories

1979 ◽  
Vol 16 (1) ◽  
pp. 60-72 ◽  
Author(s):  
J. P. N. Badham
Keyword(s):  
Northwest Territories ◽  
Field Data ◽  
Easter Island ◽  
Chemical Data ◽  
Lower Proterozoic ◽  
Great Slave Lake ◽  
Data Support ◽  
Igneous Complexes ◽  
Igneous Activity ◽  
History Of

Two alkaline igneous complexes and three lines of diatreme breccias were emplaced in the East Arm of Great Slave Lake during the lower Proterozoic. Field relationships suggest that those rocks are broadly cogenetic and were emplaced about 2.1 Ga ago.One of the intrusions, the Easter Island dyke, was rotated subsequent to emplacement such that both top and bottom are now exposed. Field and petrographic data are indicative of progressive differentiation along (i.e., up) the dyke and are substantiated by chemical data. The differentiation history of the early gabbros of the Blachford Lake complex is similar. Late differentiates of both complexes closely resemble the igneous matrices of the breccias and petrographic and chemical data support the proposal of cogenesis and contemporaneity.The field data show that there was a period of significant faulting and concomitant alkaline igneous activity in the East Arm area in the lower Proterozoic.

Uncovering the Canning Basin: a new comprehensive SEEBASE® model

2018 ◽  
Vol 58 (2) ◽  
pp. 793
Author(s):  
Karen Connors ◽  
Cedric Jorand ◽  
Peter Haines ◽  
Yijie Zhan ◽  
Lynn Pryer
Keyword(s):  
Western Australia ◽  
Potential Field ◽  
Field Data ◽  
Regional Scale ◽  
Structural Evolution ◽  
Potential Field Data ◽  
Canning Basin ◽  
The North ◽  
Wide Range ◽  
Order Of Magnitude

A new regional scale SEEBASE® model has been produced for the intracratonic Canning Basin, located in the north of Western Australia. The 2017 Canning Basin SEEBASE model is more than an order of magnitude higher resolution than the 2005 OZ SEEBASE version — the average resolution is ~1 : 1 M scale with higher resolution in areas of shallow basement with 2D seismic coverage — such as the Broome Platform and Barbwire Terrace. Post-2005 acquisition of potential field, seismic and well data in the Canning Basin by the Geological Survey of Western Australia (GSWA), Geoscience Australia and industry provided an excellent opportunity to upgrade the SEEBASE depth-to-basement model in 2017. The SEEBASE methodology focuses on a regional understanding of basement, using potential field data to interpret basement terranes, depth-to-basement (SEEBASE), regional structural geology and basement composition. The project involved extensive potential field processing and enhancement and compilation of a wide range of datasets. Integrated interpretation of the potential field data with seismic and well analysis has proven quite powerful and illustrates the strong basement control on the extent and location of basin elements. The project has reassessed the structural evolution of the basin, identified and mapped major structures and produced fault-event maps for key tectonic events. In addition, interpretative maps of basement terranes, depth-to-Moho, basement thickness, basement composition and total sediment thickness have been used to calculate a basin-wide map of basement-derived heat flow. The 2017 Canning Basin SEEBASE is the first public update of the widely used 2005 OZ SEEBASE. All the data and interpretations are available from the GSWA as a report and integrated ArcGIS project, which together provide an excellent summary of the key features within the Canning Basin that will aid hydrocarbon and mineral explorers in the region.

scholarly journals Experimental and Field Data Support Range Expansion in an Allopolyploid Arabidopsis Owing to Parental Legacy of Heavy Metal Hyperaccumulation

2020 ◽  
Vol 11 ◽  
Author(s):  
Timothy Paape ◽  
Reiko Akiyama ◽  
Teo Cereghetti ◽  
Yoshihiko Onda ◽  
Akira S. Hirao ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Range Expansion ◽  
Field Data ◽  
Metal Hyperaccumulation ◽  
Data Support

Multidecadal Field Data Support Intimate Links between Phytoplankton Dynamics and PCB Concentrations in Marine Sediments and Biota

2015 ◽  
Vol 49 (14) ◽  
pp. 8704-8711 ◽  
Author(s):  
Gert Everaert ◽  
Frederik De Laender ◽  
Peter L. M. Goethals ◽  
Colin R. Janssen
Keyword(s):  
Marine Sediments ◽  
Field Data ◽  
Phytoplankton Dynamics ◽  
Data Support

Using field data to evaluate the complex bridge piers scour methods

2016 ◽  
Vol 43 (3) ◽  
pp. 218-225 ◽  
Author(s):  
M.H. Jannaty ◽  
A. Eghbalzadeh ◽  
S.A. Hosseini
Keyword(s):  
Field Data ◽  
Complex Geometry ◽  
Bridge Piers ◽  
Scour Depth ◽  
Laboratory Studies ◽  
Sediment Characteristics ◽  
Pier Scour ◽  
Recorded Data

Scour is a phenomenon that causes riverbed erosion. Many laboratory studies have been conducted to identify the complex geometry of the scour mechanism and to predict its depth, and various methods have been proposed. In this study, the performance of these methods in estimating scour depth was evaluated using field data. For this purpose, scour data on the Adinan Bridge, which was destroyed as a result of the scour phenomenon and consequently rebuilt, was collected. The bridge was built with complex piers. The flow and sediment characteristics for the bridge site were determined using field measurement. Then, the pier scour was calculated using the empirical formula and the calculated values were compared with the recorded data. The results showed the inefficiency of these methods in accurately estimating the scour depth. However, the role of the components of a composite pier has not been reflected properly in the determination of scour in these methods.

scholarly journals Biological Markers in Animal Sentinels: Laboratory Studies Improve Interpretation of Field Data

1990 ◽  
pp. 163-175 ◽  
Author(s):  
John F. McCarthy ◽  
Braulio D. Jimenez ◽  
Lee R. Shugart ◽  
Frederick V. Sloop ◽  
Aimo Oikari
Keyword(s):  
Biological Markers ◽  
Field Data ◽  
Laboratory Studies

Correction

Soil Research ◽  
1995 ◽  
Vol 33 (4) ◽  
pp. 733
Author(s):  
SR Walker ◽  
WM Blacklow
Keyword(s):  
Simulation Model ◽  
Western Australia ◽  
Triazine Herbicides ◽  
Laboratory Studies

Adsorption and Degradation of Triazine Herbicides in Soils Used for Lupin Production in Western-Australia - Laboratory Studies and a Simulation-Model (Vol 32, Pg 1189, 1994)

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