ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Field cage studies with a genetic sexing strain in the Mediterranean fruit fly, Ceratitis capitata (1986)
    Springer
    Entomologia experimentalis et applicata 41 (1986), S. 231-235 
    Details
    ISSN: 1570-7458
    Keywords: genetic sexing ; Ceratitis capitata ; field cages ; competitiveness
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Des expériences en cage en champ ont été réalisées en Italie avec des populations naturelles de Ceratitis capitata en utilisant une lignée dont le sexage était basé sur le dimorphisme de la couleur des pupes. Les expériences ont été conçues pour contrôler la compétitivité des mâles de cette lignée face aux mâles sauvages, et d'évaluer l'effet du retrait des femelles avant le lâcher sur le pourcentage de femelles sauvages accouplées avec des mâles lâchés. Les expériences montrent que la compétition ne défavorise pas la lignée génétiquement sexable mais révèlent une fréquence élevée d'accouplement intralignée. Le retrait des femelles avant le lâcher modifie radicalement l'orientation des accouplements d'intra vers interlignées. Ce changement accroît fortement l'efficacité de la technique d'utilisation des mâles stériles dans la lutte biologique. On en a conclu que non seulement des intérêts économiques évidents mais aussi des avantages biologiques significatifs seraient retirés de l'intégration de telles lignées sexables génétiquement dans les programmes de lutte avec des mâles stériles.
    Notes: Abstract Using a genetic sexing line based on pupal colour dimorphism in Ceratitis capitata Wied., field cage experiments were carried out with a wild population in Italy. The experiments were designed to monitor the competitiveness of males of this line in comparison with wild males and to assess the effect of removal of females prior to release on the proportion of wild females mated by the released males. The results showed that the genetic sexing strain competed well with the wild population but there was a large degree of intra-strain mating. Removal of females prior to release radically changed the mating pattern from intra to inter-strain mating. This change greatly increases the efficiency of the sterile insect method of control. It was concluded that as well as the obvious economic advantages of genetic sexing, significant biological advantages would also be associated with the integration of such a strain in a sterile insect control programme.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00221252
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Induction of alcohol dehydrogenase null mutants in the mediterranean fruit fly Ceratitis capitata (1986)
    Springer
    Biochemical genetics 24 (1986), S. 765-774 
    Details
    ISSN: 1573-4927
    Keywords: Ceratitis capitata ; alcohol dehydrogenase ; null mutants ; genetic sexing ; Y-linked translocations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Alcohol dehydrogenase null mutants have been induced with X rays in Ceratitis capitata, for use in a genetic sexing system. A combination of selective medium and electrophoretic screening was used to identify these mutants. The results indicate that they are probably large deletions since no homozygotes were found for any of the induced mutants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00499008
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Genetic sexing in the mediterranean fruit fly, Ceratitis capitata, using the alcohol dehydrogenase locus (1986)
    Springer
    Theoretical and applied genetics 72 (1986), S. 455-457 
    Details
    ISSN: 1432-2242
    Keywords: Genetic sexing ; ADH ; Allyl alcohol ; Ceratitis capitata ; Medfly
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Using the alcohol dehydrogenase (ADH) locus a genetic sexing system is being developed in the Mediterranean fruit fly Ceratitis capitata based on the sensitivity of ADH null mutations to environmental ethanol. A series of null mutants have been induced at this locus, however, none proved viable as homozygotes. One of these null mutants was translocated to the male determining chromosome and this line can be used for genetic sexing. When larvae from this line were reared on larval medium containing various concentrations of allyl alcohol, 97% of the emerging adults were males; in the absence of the allyl alcohol the sex ratio in the line is distorted in favour of the females. It is proposed that the higher ADH activity of the females (homozygous positive) in comparison with the males (heterozygous null) is responsible for their lower survival in larval medium containing allyl alcohol. ADH converts the allyl alcohol to the lethal ketone. The possible use of this line to sex large populations of medflies for use in sterile insect release programmes is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00289526
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    facet.materialart.
    Unknown
    A cool anomaly off northern California - An investigation using IR imagery and in situ data (1985)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The OPTOMA (Ocean Prediction Through Observation, Modeling and Analysis) program is developing an ocean descriptive-predictive system for four-dimensional data assimilation. It is presently concerned with the mesoscale variability in the California Current System (CCS). The present paper has the objective to assess the relationship of surface temperature structure to subsurface temperature structure and flow fields. Surface temperature anomalies are related to the mesoscale horizontal advective and subsurface mass fields. The cool anomaly off northern California in summer 1982 is discussed, taking into account the temperature structure along transects, T-S variations and inferred water masses, variation of horizontal temperature patterns with depth, and synoptic information from IR data.
    Keywords: OCEANOGRAPHY
    Type: Journal of Geophysical Research (ISSN 0148-0227); 90; 4807-481
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 5
    facet.materialart.
    Unknown
    A baroclinic quasigeostrophic open ocean model (1983)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: A baroclinic quasigeostrophic open ocean model is presented, calibrated by a series of test problems, and demonstrated to be feasible and efficient for application to realistic mid-oceanic mesoscale eddy flow regimes. Two methods of treating the depth dependence of the flow, a finite difference method and a collocation method, are tested and intercompared. Sample Rossby wave calculations with and without advection are performed with constant stratification and two levels of nonlinearity, one weaker than and one typical of real ocean flows. Using exact analytical solutions for comparison, the accuracy and efficiency of the model is tabulated as a function of the computational parameters and stability limits set; typically, errors were controlled between 1 percent and 10 percent RMS after two wave periods. Further Rossby wave tests with realistic stratification and wave parameters chosen to mimic real ocean conditions were performed to determine computational parameters for use with real and simulated data. Finally, a prototype calculation with quasiturbulent simulated data was performed successfully, which demonstrates the practicality of the model for scientific use.
    Keywords: OCEANOGRAPHY
    Type: Journal of Computational Physics (ISSN 0021-9991); 50; April 19
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 6
    facet.materialart.
    Unknown
    A study of the variability of ocean currents in the northwestern Atlantic using satellite altimetry (1984)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Altimeter data obtained from GEOS-3 during the three year period 1975-78 for a region of the western North Atlantic which includes a portion of the Gulf Stream system and part of the open ocean area of the subtropical gyre are analyzed by a new technique which utilizes all the points along the satellite tracks. The physical phenomenon studied are the time-variable but almost geostrophic currents, or mesoscale eddies, so that geoid errors contaminate the scientific signal minimally and the dynamical interpretation is direct. Results presented include the spatial distribution of geostrophic eddy kinetic energy and examples of a synoptic map of the eddy field (April 1977) and of a time series at a point. These results are compared to and synthesized with a diverse and select set of existing measurements and observations obtained in situ by a variety of instrumental techniques. The agreement is generally good, and the altimeter data analyzed provides new information on features in the map of mean eddy kinetic energy. The implications are that satellite altimetry will serve as a powerful quantitative tool in eddy current research and that even presently archived data contains further useful scientific information.
    Keywords: OCEANOGRAPHY
    Type: Journal of Physical Oceanography (ISSN 0022-3670); 13; 565-585
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 7
    facet.materialart.
    Unknown
    Analysis models for the estimation of oceanic fields (1987)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: A general model for statistically optimal estimates is presented for dealing with scalar, vector and multivariate datasets. The method deals with anisotropic fields and treats space and time dependence equivalently. Problems addressed include the analysis, or the production of synoptic time series of regularly gridded fields from irregular and gappy datasets, and the estimate of fields by compositing observations from several different instruments and sampling schemes. Technical issues are discussed, including the convergence of statistical estimates, the choice of representation of the correlations, the influential domain of an observation, and the efficiency of numerical computations.
    Keywords: OCEANOGRAPHY
    Type: Journal of Atmospheric and Oceanic Technology (ISSN 0739-0572); 4; 49-74
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 8
    facet.materialart.
    Unknown
    Applications of Seasat to the offshore oil, gas and mining industries (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The NASA satellite Seasat-A (to be launched in 1978) has applications to the offshore oil, gas, and mining industries including: (1) improvements in weather and wave forecasting, (2) studies of past wind and wave statistics for planning design requirements, and (3) monitoring ice formation, breakup, and movement in arctic regions. The primary geographic areas which will be monitored by Seasat-A include: the Beaufort Sea, the Labrador Sea, the Gulf of Mexico, the U.S. east coast, West Africa, Equatorial East Pacific, the Gulf of Alaska, and the North Sea. Seasat-A instrumentation used in ocean monitoring consists of a radar altimeter, a radar scatterometer, a synthetic aperture radar, a microwave radiometer, and a visible and infrared radiometer. The future outlook of the Seasat program is planned in three phases: measurement feasibility demonstration (1978-1980), data accessibility/utility demonstration (1980-1983), and operational system demonstration (1983-1985).
    Keywords: OCEANOGRAPHY
    Type: AIAA PAPER 77-1583 , Conference on Satellite applications to marine technology; Nov 15, 1977 - Nov 17, 1977; New Orleans, LA
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...