Genetic variation in parthenogeneticArtemia from the Shandong Peninsula,P.R.C.     

Charles E. King  Zhao Yuqi  Liu Xin  Li Mingren 《中国海洋湖沼学报》1988,6(2):179-185

Results are presented of a survey of isozyme frequencies in parthenogeneticArtimia from six salterns in the Shandong Peninsula, P.R.C. Three of the eleven enzymes we scored using polyacryamide gel electrophoresis proved to be useful for analysis of electromorph frequency variation. These enzymes are tetrazolium oxidase (TO), lactate dehydrogenase (LDH), and malate dehydrogenase (MDH). Each of these systems showed extensive isozyme variation both within and between salterns. In addition, we have examined the possibility that electromorph frequencies may vary as the result of natural selection for adaptation to specific salinity, or salinity-associated environmental conditions. An indication of clinal variation was found in two series of ponds differing in salinity, however more extensive data are needed before it is possible to conclude that these patterns are the result of natural selection. Finally, the use of isozyme analyses such as ours, for unraveling taxonomic problems inArtemia is discussed.  相似文献   

The evolution of a thrust fault system: processes of rupture initiation, propagation and termination in the 1980 El Asnam (Algeria) earthquake     

Geoffrey King  Graham Yielding 《Geophysical Journal International》1984,77(3):915-933

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Iodine Stabilized Laser Strainmeter     

N. R. Goulty  G. C. P. King  A. J. Wallard 《Geophysical Journal International》1974,39(2):269-282

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Site Correction for Long Period Seismometers, Tiltmeters and Strainmeters     

Geoffrey King  Walter Zurn  Russ Evans  Dieter Emter 《Geophysical Journal International》1976,44(2):405-411

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Summary results from a pilot study conducted around an oil production platform on the Northwest Shelf of Australia   总被引：3，自引：0，他引：3  

King SC  Johnson JE  Haasch ML  Ryan DA  Ahokas JT  Burns KA 《Marine pollution bulletin》2005,50(11):1163-1172

The Australian Institute of Marine Science (AIMS) conducted a pilot study around the Harriet A oil production platform on the Northwest Shelf of Australia. We evaluated hepatic ethoxyresorufin-O-deethylase (EROD) activity, fluorescent aromatic compounds (FACs) in bile and immunodetection of CYP1A-like proteins in two Australian tropical fish species, Gold-Spotted Trevally (Carangoides fulvoguttatus) and Bar-Cheeked Coral Trout (Plectropomus maculatus) to assess exposure to petroleum hydrocarbons associated with produced formation water (PFW). Additionally, the incidence of hydrocarbon-degrading bacteria isolated from the liver and bile of all fish captured was examined. Low EROD activity was found in both species, with EROD activity in C. fulvoguttatus showing significant site differences. FACs and CYP1A protein levels in C. fulvoguttatus showed a clear trend in hydrocarbon exposure consistent with hydrocarbon chemistry data: Harriet A>Harriet C>reference site. P. maculatus showed elevated levels of FACs at Harriet A as compared to the reference site and demonstrated detectable levels of CYP1A-like proteins at these two sites. Hydrocarbon-degrading bacteria were found in the liver and bile of both species, yet there was no correlation by sites. Our results demonstrate that C. fulvoguttatus and P. maculatus have potential as indicator species for assessing the effects from exposure to petroleum hydrocarbons. Both FACs and CYP1A are providing warning signs that there is potential for biological effects on fish populations exposed to PFW around the Harriet A production platform.  相似文献   

Earth Strain Tides Observed in Yorkshire, England with a Simple Wire Strainmeter     

Roger Bilham  Russ Evans  Geoffrey King  Alette Lawson  Dan McKenzie 《Geophysical Journal International》1972,29(4):473-485

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The acoustic transient recording buoy (ATRB): system descriptionand initial measurement results     

Tattersall  J.M. King  P.C. Mingrone  J.A. Herstein  P.D. 《Oceanic Engineering, IEEE Journal of》1992,17(3):227-238

An acoustic transient recording buoy (ATRB) developed to provide improved dynamic range and recording capacity in a reconfigurable manner is described. This digital system can acquire and record up to 16 h of broadband wide dynamic range (≈80 dB) acoustic data from eight hydrophones. A unique feature is the use of two inexpensive video cassette recorders to obtain up to 10 Gb of data storage capacity. The system is self-contained and capable of unattended bottom-moored operation. An experiment designed and conducted using a single ship and this system to obtain simultaneous measurements of sea surface forward scatter, propagation loss, and sea floor interaction is reported. Data obtained demonstrate the utility of this system for ocean acoustic experiments. Explosive charge source levels using direct path measurements agreed with previous measurements. Surface reflected data exhibited a frequency dependence attributed to sea surface swell and roughness  相似文献   

The palaeobiogeography of Permian anomodonts     

Gillian M. King 《地学学报》1992,4(6):633-640

It is generally considered that the oldest anomodont mammal-like reptiles are known from Late Permian sediments of the USSR and that during the rest of the Late Permian distribution of these fossils widens to encompass nearly all geographical areas by the end of the Period.
This study reviews the occurrence of anomodont genera in Permian sediments and reassesses the conventionally accepted distribution pattern. A broad correlation of terrestrial Permian rocks from different continents is attempted. Using recent reconstructions of Permian continental positions the effect of latitude on anomodont distribution is investigated. Some explanations for the restrictions operating on anomodont distribution are suggested.  相似文献   

Vulnerability of Aboriginal health systems in Canada to climate change   总被引：1，自引：0，他引：1  

James D. Ford  Lea Berrang-Ford  Malcolm King  Chris Furgal   《Global Environmental Change》2010,20(4):668-680

Climate change has been identified as potentially the biggest health threat of the 21st century. Canada in general has a well developed public health system and low burden of health which will moderate vulnerability. However, there is significant heterogeneity in health outcomes, and health inequality is particularly pronounced among Aboriginal Canadians. Intervention is needed to prevent, prepare for, and manage climate change effects on Aboriginal health but is constrained by a limited understanding of vulnerability and its determinants. Despite limited research on climate change and Aboriginal health, however, there is a well established literature on Aboriginal health outcomes, determinants, and trends in Canada; characteristics that will determine vulnerability to climate change. In this paper we systematically review this literature, using a vulnerability framework to identify the broad level factors constraining adaptive capacity and increasing sensitivity to climate change. Determinants identified include: poverty, technological capacity constraints, socio-political values and inequality, institutional capacity challenges, and information deficit. The magnitude and nature of these determinants will be distributed unevenly within and between Aboriginal populations necessitating place-based and regional level studies to examine how these broad factors will affect vulnerability at lower levels. The study also supports the need for collaboration across all sectors and levels of government, open and meaningful dialogue between policy makers, scientists, health professionals, and Aboriginal communities, and capacity building at a local level, to plan for climate change. Ultimately, however, efforts to reduce the vulnerability of Aboriginal Canadians to climate change and intervene to prevent, reduce, and manage climate-sensitive health outcomes, will fail unless the broader determinants of socio-economic and health inequality are addressed.  相似文献   

Two new large-separation gravitational lenses from SDSS     

V. Belokurov  N. W. Evans  P. C. Hewett  A. Moiseev  R. G. McMahon  S. F. Sanchez  L. J. King 《Monthly notices of the Royal Astronomical Society》2009,392(1):104-112

We present discovery images, together with follow-up imaging and spectroscopy, of two large-separation gravitational lenses found by our survey for wide arcs [the CAmbridge Sloan Survey Of Wide ARcs in the skY (CASSOWARY)]. The survey exploits the multicolour photometry of the Sloan Digital Sky Survey to find multiple blue components around red galaxies. CASSOWARY 2 (or 'the Cheshire Cat') is composed of two massive early-type galaxies at   z = 0.426  and 0.432, respectively, lensing two background sources, the first a star-forming galaxy at   z = 0.97  and the second a high -redshift galaxy  ( z > 1.4)  . There are at least three images of the former source and probably four or more of the latter, arranged in two giant arcs. The mass enclosed within the larger arc of radius ∼11 arcsec is  ∼33 × 10¹² M_⊙  . CASSOWARY 3 comprises an arc of three bright images of a   z = 0.725  source, lensed by a foreground elliptical at   z = 0.274  . The radius of the arc is ∼4 arcsec and the enclosed mass is  ∼2.5 × 10¹² M_⊙  . Together with earlier discoveries like the Cosmic Horseshoe and the 8 o'clock Arc, these new systems, with separations intermediate between the arcsecond-separation lenses of typical strong galaxy lensing and arcminute-separation cluster lenses, probe the very high end of the galaxy mass function.  相似文献