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  • 1
    Keywords: Konferenzschrift ; CD-ROM
    Type of Medium: Electronic Resource
    Pages: 4 CD-ROMs , 1 Beih. (II, 25 S.)
    Edition: [Elektronische Ressource]
    Series Statement: ICES cooperative research report 250
    Language: English
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  • 2
    Keywords: Hochschulschrift
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (53 Seiten = 3,5 MB) , Illustrationen, Graphen
    Edition: Online-Ausgabe 2021
    Language: English
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  • 3
    Online Resource
    Online Resource
    San Diego :Elsevier Science & Technology,
    Keywords: Zooplankton. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (707 pages)
    Edition: 1st ed.
    ISBN: 9780080495330
    DDC: 592.1/77
    Language: English
    Note: Front Cover -- ICES Zooplankton Methodology Manual -- Copyright Page -- Contents -- List of Contributors -- Preface -- Chapter 1. Introduction -- 1.1 Introduction -- 1.2 General definitions -- 1.3 Size classification -- 1.4 Main systematic groups -- 1.5 Species diversity -- 1.6 Ecological position -- 1.7 Distribution pattern -- 1.8 Growth and metabolism -- 1.9 Reproduction and development -- 1.10 Standing stock and production -- 1.11 Conclusion -- 1.12 References -- Chapter 2. Sampling and experimental design -- 2.1 Introduction -- 2.2 Conceptual issues -- 2.3 Design of oceanographic cruises and surveys -- 2.4 References -- Chapter 3. Collecting zooplankton -- 3.1 Introduction -- 3.2 A survey of sampling devices -- 3.3 Factors influencing mesozooplankton samples -- 3.4 Handling towed samplers -- 3.5 Care of towing cables -- 3.6 Handling samples and sample preservation -- 3.7 Collection of live zooplankton for experimental studies -- 3.8 Other zooplankton instruments used in conjunction with nets -- 3.9 References -- Chapter 4. Biomass and abundance -- 4.1 Introduction -- 4.2 Shipboard sample treatment -- 4.3 Biovolume and biomass determinations (W. Hagen) -- 4.4 Abundance and species identification -- 4.5 Analysis of community structure (H. Fock) -- 4.6 Acknowledgment -- 4.7 References -- Chapter 5. Sampling, preservation, enumeration and biomass of marine protozooplankton -- 5.1 Introduction -- 5.2 Collection methods -- 5.3 Preservation and enumeration -- 5.4 Determination of biomass conversion factors -- 5.5 Standard protocols -- 5.6 Acknowledgments -- 5.7 References -- Chapter 6. Acoustical methods -- 6.1 Introduction -- 6.2 General discussion of principles, instruments, techniques, and comparative approaches -- 6.3 Measurement protocols, model computations, and examples -- 6.4 Acknowledgments -- 6.5 References -- Chapter 7. Optical methods. , 7.1 Introduction -- 7.2 General discussion of principles, techniques, and comparative approaches -- 7.3 Measurement protocols, model computations, and examples -- 7.4 Acknowledgments -- 7.5 References -- Chapter 8. Feeding -- 8.1 Introduction -- 8.2 Feeding mechanisms of zooplankton -- 8.3 Expression of zooplankton feeding rates and common conversion factors -- 8.4 Microzooplankton -- 8.5 Meso- and macrozooplankton -- 8.6 Difficulties with specitic zooplankton groups -- 8.7 Omnivory -- 8.8 Factors regulating feeding rate -- 8.9 Predation behavioral models -- 8.10 Concluding remarks -- 8.11 Acknowledgments -- 8.12 References -- Chapter 9. The measurement of growth and reproductive rates -- 9.1 Introduction: why measure growth and reproductive rates of zooplankton? -- 9.2 Models of growth and fecundity -- 9.3 Determination of egg production rate: broadcast spawning copepods -- 9.4 Egg production rates of egg carrying copepods -- 9.5 The determination of growth rate -- 9.6 Biochemical and radiochemical methods -- 9.7 Measurement of egg production rate of a marine planktonic copepod (Calanus Finmarchicus) -- 9.8 Direct determination of copepod molting and growth rates in the field -- 9.9 Acknowledgments -- 9.10 Referemces -- Chapter 10. Metabolism -- 10.1 Oxygen consumption as an index of metabolism -- 10.2 Nitrogen and phosphorus metabolism -- 10.3 Measuring metabolic rate on live zooplankton -- 10.4 Metabolic rate and enzymatic indices -- 10.5 Concluding remarks -- 10.6 Collection and handling of zooplankton -- 10.7 Respiration -- 10.8 Excretion (T. Ikeda) -- 10.9 References -- Chapter 11. Methods for population genetic analysis of zooplankton -- 11.1 Background -- 11.2 Technical approaches to determining genetic diversity -- 11.3 Statistical approaches to assessing genetic diversity and structure. , 11.4 Strategies for preservation of zooplankton samples for genetic analysis -- 11.5 General recommendations -- 11.6 Measurement protocols -- 11.7 Further reading -- 11.8 Acknowledgments -- 11.9 References -- Chapter 12. Modeling zooplankton dynamics -- 12.1 Introduction -- 12.2 Modeling approaches and techniques -- 12.3 Models of individual bioenergetics and life history traits -- 12.4 Population models -- 12.5 Models of zooplankton communities -- 12.6 Modeling spatial dynamics of zooplankton -- 12.7 Acknowledgments -- 12.8 References -- Index.
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  • 4
    Type of Medium: Book
    Pages: IV, S. 1921 - 2344 , graph. Darst., Kt
    Series Statement: Deep sea research 51.2004,17/19
    Language: English
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  • 5
    Type of Medium: Book
    Pages: III, 43 S. , graph. Darst., Kt.
    Series Statement: GLOBEC Report 27
    Language: English
    Note: Literaturverz. S. 38 - 43
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  • 6
    ISSN: 1752-7325
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Objectives: In Canada and the United States, professionally applied topical fluorides (PATF) are usually applied as a gel or foam. However, fluoride varnish has also been found to be effective for caries prevention and may be a preferred method because less time is required and fluoride exposure can be better controlled. The goal of this study was to compare the costs and patient acceptability of two methods of PATF (foam and varnish). Methods: The study population was a convenience sample of high-risk children from the York Region and the city of Hamilton, Ontario, Canada, who had been identified as requiring fluoride therapy (n=256). Children received from dental hygienists either fluoride foam applied in trays or fluoride varnish painted on tooth surfaces. An observer recorded the time to perform each procedure, adverse outcomes, and the satisfaction of children with treatment. Results: The varnish technique took significantly less time compared to foam (5.81 vs 7.86 minutes; P〈.0001). Significant differences between procedure times were found in all age groups, but the largest difference was for children aged 3–6 years (5.22 vs 8.61 minutes; P〈.0001). Signs of gagging were observed in a lower proportion of participants who received varnish (3.8% vs 15.1 % P〈.01), and this difference was largest for children aged 3–6 years (2.6% vs 29.7% P〈.01). The cost per varnish application, for children aged 3–6 years, was substantially less after labor costs were considered ($3.43 vs $4.43, CDN). Conclusions: Varnish applications were found to take less time and resulted in fewer signs of discomfort. These results support the use of fluoride varnish in caries prevention programs, especially for younger children.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of public health dentistry 64 (2004), S. 0 
    ISSN: 1752-7325
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Objectives: It has been suggested that changes in the distribution of dental caries mean that targeting high-risk groups can maximize the cost effectiveness of dental health programs. This study aimed to assess the effectiveness of a targeted school-based dental screening program in terms of the proportion of children with dental care needs it identified. Methods: The target population was all children in junior and senior kindergarten and grades 2, 4, 6, and 8 who attended schools in four Ontario communities. The study was conducted in a random sample of 38 schools stratified according to caries risk. Universal screening was implemented in these schools. The parents of all children identified as having dental care needs were sent a short questionnaire to document the sociodemographic and family characteristics of these children. Children with needs were divided into two groups: those who would and who would not have been identified had the targeted program been implemented. The characteristics of the two groups were compared. Results: Overall, 21.0 percent of the target population were identified as needing dental care, with 7.4 percent needing urgent care. The targeted program would have identified 43.5 percent of those with dental care needs and 58.0 percent of those with urgent needs. There were substantial differences across the four communities in the proportions identified by the targeted program. Identification rates were lowest when the difference in prevalence of need between the high- and low-risk groups was small and where the low-risk group was large in relation to the high-risk group. The targeted program was more effective at identifying children from disadvantaged backgrounds. Of those with needs who lived in households receiving government income support, 59.0 percent of those with needs and 80.1 percent of those with urgent needs would be identified. Conclusions: The targeted program was most effective at identifying children with dental care needs from disadvantaged backgrounds. However, any improvements in cost effectiveness achieved by targeting must be balanced against inequities in access to public health care resources.
    Type of Medium: Electronic Resource
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  • 8
    Publication Date: 2019-09-23
    Type: Report , NonPeerReviewed
    Format: text
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  • 9
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    In:  (Diploma thesis), Christian-Albrechts-Universität zu Kiel, Kiel, Germany, 57 pp
    Publication Date: 2021-11-30
    Type: Thesis , NonPeerReviewed
    Format: text
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  • 10
    Publication Date: 2017-01-04
    Description: Author Posting. © The Authors, 2004. This is the author's version of the work. It is posted here by permission of Elsevier B. V. for personal use, not for redistribution. The definitive version was published in ICES Journal of Marine Science 62 (2005): 818-831, doi:10.1016/j.icesjms.2004.12.020.
    Description: Sound-speed and density contrasts (h and g, respectively), two important acoustic material properties, of live zooplankton were measured off the western Antarctic Peninsula during a Southern Ocean GLOBEC cruise conducted from 9 April to 21 May 2002. The work included in situ sound-speed contrast and shipboard density-contrast measurements. The temperature and pressure (depth) dependence of the sound-speed contrast of Euphausia superba and E. crystallorophias as well as that of some other zooplankton species were investigated. The size range of E. superba used in the measurements varied from about 20 mm to 57 mm, with mean length of 36.7 mm and standard deviation of 9.8 mm, which covered life stages from juvenile to adult. For E. superba, there was no statistically significant depth dependence, but there was a moderate dependence of sound-speed and density contrasts on the size of the animals. The measured sound-speed contrast varied between 1.018 and 1.044, with mean value 1.0279 and standard deviation 0.0084, while the measured density contrast varied between 1.007 and 1.036, with mean value 1.0241 and standard deviation 0.0082. For E. crystallorophias and Calanus there was a measurable depth dependence in sound-speed contrast. The in situ sound-speed contrasts for E. crystallorophias were 1.025 ± 0.004 to 1.029 ± 0.009. For Calanus, they were variable, with one set giving a value of 0.949 ± 0.001 and the other giving 1.013 ± 0.002. Shipboard measurements of other taxa/species also showed substantial variation in g and h. In general, values of g ranged from 0.9402 to 1.051 and h ranged from 0.949 to 1.096. The variation of the material properties is related to species, type, size, stage, and in some cases depth of occurrence. The uncertainty of the estimates of zooplankton biomass attributable to these variations in g and h can be quite large (more than 100 fold). Improvements in making biological inferences from acoustic data depend strongly on increased information about the material properties of zooplankton and the biological causes for their variation, as well as a knowledge of the species composition and abundance.
    Description: This work was supported by the National Science Foundation, grant No. OPP 0125629.
    Keywords: Acoustic scattering ; Antarctic krill ; Density contrast ; Krill ; Material properties ; Sound-speed contrast ; Western Antarctic Peninsula ; Zooplankton
    Repository Name: Woods Hole Open Access Server
    Type: Preprint
    Format: 465920 bytes
    Format: 296960 bytes
    Format: application/msword
    Format: application/msword
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