Habitat mapping in the Caribbean for management and conservation: Use and assessment of aerial photography     

C. R. C. Sheppard  K. Matheson  J. C. Bythell  P. Murphy  C. Blair Myers  B. Blake 《水产资源保护:海洋与淡水生态系统》1995,5(4):277-298

• 1 The nature and distribution of the coastal and shallow marine habitats of Anguilla in the Caribbean were examined using aerial photography coupled with extensive ground truth information.
• 2 The objective was to develop an accurate method of marine habitat mapping for the analysis of the marine ecosystem in order to develop a procedure for marine and coastal resource management.
• 3 This paper describes the method which was adopted as well as the biological results.
• 4 It is concluded that the management and sustainable use of the natural resources may be improved as a result of accurate habitat mapping.

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Intra-specific variation of wheat grain quality in response to elevated [CO₂] at two sowing times under rain-fed and irrigation treatments     

Nimesha Fernando  Joe Panozzo  Michael Tausz  Robert M. Norton  Glenn J. Fitzgerald  Samuel Myers  Marc E. Nicolas  Saman Seneweera 《Journal of Cereal Science》2014

In order to investigate the intra-specific variation of wheat grain quality response to elevated atmospheric CO₂ concentration (e[CO₂]), eight wheat (Triticum aestivum L.)cultivars were grown at two CO₂ concentrations ([CO₂]) (current atmospheric, 389 CO₂ μmol mol⁻¹vs. e[CO₂], FACE (Free-Air CO₂ Enrichment), 550  ±  10% CO₂ μmol mol⁻¹), at two water levels (rain-fed vs. irrigated) and at two times of sowing (TOS₁, vs. TOS₂). The TOS treatment was mainly imposed to understand whether e[CO₂] could modify the effects of timing of higher grain filling temperatures on grain quality. When plants were grown at TOS₁, TKW (thousand kernel weight), grain test weight, hardness index, P, Ca, Na and phytate were not significantly changed under e[CO₂]. On the other hand, e[CO₂] increased TKW (16%), hardness index (9%), kernel diameter (6%), test weight (2%) but decreased grain protein (10%) and grain phytate (11%) at TOS₂. In regard to grain Zn, Mn and Cu concentrations and some flour rheological properties, cultivar specific responses to e[CO₂] were observed at both sowing times. Observed genetic variability in response to e[CO₂] in terms of grain minerals and flour rheological properties could be easily incorporated into future wheat breeding programs to enable adaptation to climate change.  相似文献   

Spontaneous plasma cell myeloma in a ferret (Mustela putorius furo)     

S Methiyapun  R K Myers  J F Pohlenz 《Veterinary pathology》1985,22(5):517-519

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Use of innate behaviors to evaluate sensory function in the dog     

L J Myers 《Veterinary Clinics of North America: Small Animal Practice》1991,21(2):389-389

The need to evaluate sensory function in the dog is discussed. A group of techniques that use innate behaviors (species-typical behaviors) and are effective in the evaluation of sensory function of domestic animals are described. Techniques to measure olfactory, gustatory, auditory, and visual function are included.  相似文献   

Enterovirulence of enterotoxigenic Bacteroides fragilis in gnotobiotic pigs.   总被引：6，自引：0，他引：6  

J R Duimstra  L L Myers  J E Collins  D A Benfield  D S Shoop  W C Bradbury 《Veterinary pathology》1991,28(6):514-518

A porcine isolate of enterotoxigenic Bacteroides fragilis colonized the intestinal tract and caused watery, nonhemorrhagic diarrhea when given orally to 12, 1- to 2-day-old gnotobiotic pigs. Diarrhea occurred 2 to 3 days post-inoculation and continued throughout the 4 to 6 day post-inoculation period. Diarrheic pigs became mildly anorexic and dehydrated. They developed intestinal lesions characterized by swelling, vacuolation, and exfoliation of enterocytes, and crypt hyperplasia throughout the large intestine and, to a lesser extent, in the distal small intestine. Bacterial adherence to, or invasion of, the intestinal mucosa was not detected. A porcine isolate of nonenterotoxigenic B. fragilis was administered orally to six control pigs. The isolate colonized the intestinal tract, but the pigs did not develop clinical disease or intestinal lesions. The pathogenetic mechanism of the disease may involve mediation by a soluble enterotoxin (or toxins) elaborated by B. fragilis.  相似文献   

Feline mammary adenocarcinoma: tumor size as a prognostic indicator     

Jodi R. Viste  Sherry L. Myers  Baljit Singh    Elemir Simko 《The Canadian veterinary journal. La revue veterinaire canadienne》2002,43(1):33-37

Mammary carcinomas and adenocarcinomas (MACs) are relatively common tumors in cats. The postexcisional survival period of affected cats is inversely proportional to tumor size, but the reported median survival periods for different tumor size categories is quite variable. This variability diminishes the prognostic value of reported data. In our study, cats with MACs greater than 3 cm in diameter had a 12-month median survival period, whereas those with MACs less than 3 cm in diameter had a 21-month survival period. Survival periods for cats with MACs smaller than 3 cm ranged from 3 to 54 months; therefore, tumor size alone is of limited prognostic value in cats with MACs smaller than 3 cm in diameter. In cats with MACs larger than 3 cm in diameter, tumor size appears to have much higher prognostic relevance, because this study, as well as others, have indicated that cats with MACs greater than 3 cm in diameter have a poor prognosis, with median survival periods ranging from 4 to 12 months.  相似文献   

Traumatic injuries in agriculture     

Hard DL  Myers JR  Gerberich SG 《Journal of agricultural safety and health》2002,8(1):51-65

The National Coalition for Agricultural Safety and Health (NCASH) in 1988 addressed issues in agriculture and noted "a sense of urgency... arose from the recognition of the unabating epidemic of traumatic death and injury in American farming . . ." This article provides an update to the NCASH conference on traumatic injuries in agriculture, a history on how the facts and figures were arrived at for the NCASH conference, and a current report on the status of traumatic injuries in agriculture in the U.S. Fatal and nonfatal injuries are addressed along with national and regional surveillance systems. The Census of Fatal Occupational Injuries (CFOI) was used for reporting national agricultural production fatal injuries from 1992-1998 (25.8 deaths per 100,000 workers), the Traumatic Injury Surveillance of Farmers (TISF) 1993-1995 was used to report nonfatal injuries occurring nationally (7.5/100 workers), and Regional Rural Injury Studies I and II (RRIS-I and RRIS-II) were used to illustrate a regional approach along with in-depth, specific analyses. Fatality rates, which showed some decline in the 1980s, were fairly constant during the 1990s. Changes in nonfatal injury rates for this sector could not be assessed due to a lack of benchmark data. The main concerns identified in the 1989 NCASH report continue today: tractors are the leading cause of farm-related death due mostly to overturns; older farmers continue to be at the highest risk for farm fatalities; and traumatic injuries continue to be a major concern for youth living or working on U.S. farms. Fatal and nonfatal traumatic injuries associated with agricultural production are a major public health problem that needs to be addressed through comprehensive approaches that include further delineation of the problem, particularly in children and older adults, and identification of specific risk factors through analytic efforts. Continued development of relevant surveillance systems and implementation of appropriate interventions are the primary challenges for the current decade.  相似文献   

Absence of duplication of chromosome 21 genes in familial and sporadic Alzheimer's disease   总被引：8，自引：0，他引：8  

P H St George-Hyslop  R E Tanzi  R J Polinsky  R L Neve  D Pollen  D Drachman  J Growdon  L A Cupples  L Nee  R H Myers 《Science (New York, N.Y.)》1987,238(4827):664-666

The possibility that Alzheimer's disease (AD) is caused by overexpression or duplication of one or more genes on chromosome 21 has been raised by the observation of AD-like neuropathologic changes in individuals with Down syndrome and by the mapping of both the defect for familial AD and the amyloid beta protein gene to this autosome. Possible duplication on chromosome 21 was investigated in both familial and sporadic AD by means of restriction fragment length polymorphisms for the amyloid and SODI loci, as well as for DNA markers in the vicinity of the familial AD defect and in the critical Down syndrome region of chromosome 21. No evidence of increased DNA dosage was observed in either brain or leukocytes of patients with inherited or sporadic forms of AD. Duplication of these regions is therefore not a frequent event in either form of AD. Furthermore, no significant allelic association was detected between AD and any of the loci, including the amyloid and SODI genes, providing no support for the hypothesis that defects in these specific genes are the primary cause of AD.  相似文献   

Uncus and amygdala lesions: effects on social behavior in the free-ranging rhesus monkey   总被引：2，自引：0，他引：2  

D Dicks  R E Myers  A Kling 《Science (New York, N.Y.)》1968,165(888):69-71

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Fever: reciprocal shift in brain sodium to calcium ratio as the set-point temperature rises   总被引：2，自引：0，他引：2  

R D Myers  M Tytell 《Science (New York, N.Y.)》1972,178(62):765-767

A bacterial pyrogen acts on the brain by disturbing the natural balance between two essential cations in the cerebral region involved in thermoregulation. After typhoid vaccine is administered to the unanesthetized cat, (45)Ca(2+) efflux into the third cerebral ventricle increases while (22)Na(+) is retained in hypothalamic tissue at the same time that the set-point temperature begins to rise. The subsequent rates of (22)Na(+) and (45)Ca(2+) efflux parallel the course of the bacterial fever but in a reciprocal fashion. This supports the theory that a change in the set-point temperature is determined by an alteration in the inherent ratio of Na(+) to Ca(2+) ions in the hypothalamus.  相似文献