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  • Springer  (318)
  • American Physical Society  (58)
  • 1985-1989  (343)
  • 1950-1954  (13)
  • 1935-1939  (20)
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Keywords
Publisher
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Vocal and visual stimuli enabling copulation behavior in female buntings (1988)
    Springer
    Behavioral ecology and sociobiology 23 (1988), S. 105-108 
    Details
    ISSN: 1432-0762
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The loud and elaborate songs of male songbirds are throught to serve in territorial defense and to stimulate reproductive behavior in the female. We report here that in contrast to several other species, song alone is inadequate to induce sexual (lordosis) behavior in female indigo and lazuli buntings (Passerina cyanea and P. amoena); they require a more elaborate stimulus configuration to develop the full expression of sexual receptivity as indicated by a stereotyped copulation solicitation display. A live male must be present near the female, singing must ensue, and in addition a second and unique vocal utterance must be heard by the female; this is a soft buzzy-sounding vocalization, audible for no more than a few meters, not recognized previously as a critical arousal signal of the male songbird repertoire. Females also utter similar soft sounds in an intimate vocal exchange with the male leading to solicitation of copulation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00299893
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  • 2
    Electronic Resource
    Electronic Resource
    A family of pneumatically-operated thin layer samplers for replicate sampling of heterogeneous water columns (1985)
    Springer
    Hydrobiologia 122 (1985), S. 207-211 
    Details
    ISSN: 1573-5117
    Keywords: microstratification ; thin layer sampler ; heterogeneous water column ; chemocline ; stratification ; meromixis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A series of inexpensive, pneumatic thin layer water samplers is described. They can be operated from small boats, and permit sampling at 2.5 cm intervals with little or no disturbance of stratified systems such as oxyclines or redoxclines of meromictic lakes, or microstratification of flagellates in sheltered epilimnia. Some models permit replicate sampling at closely-spaced intervals in a two-dimensional array. Their performance abilities are illustrated with examples of microstratification.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00018280
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  • 3
    Electronic Resource
    Electronic Resource
    The occurrence and significance of amino acids in floral nectar (1986)
    Springer
    Plant systematics and evolution 151 (1986), S. 175-186 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms. — Nectar ; amino acids ; pollinators ; sample size ; phylogenetic constraint ; evolutionary significance. — Flora of California
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Approximately 1 500 angiosperm species, in previous papers, have been sampled for the assessment of the amino acids (a. a.) in their nectar. We reaffirm that the findings provide statistically significant data linking differences in the concentration with pollinator type. Flowers that are pollinated by animals that have alternative sources of protein-building a. a.’s show lower a. a. concentration than those that are not. There is a tendency for woody plant nectar a. a.’s to be less concentrated than those of herbaceous plants, but there can be “phylogenetic constraints” which may reduce the correlations of a. a. concentration with pollinator type and with life form. The individual a. a.’s form complements which are qualitatively extremely constant within species. Proline is a normal constituent of many nectars and does not necessarily indicate contamination of the nectar by pollen. Criticism of our findings byGottsberger & al. (1984) is answered by reference to our previous publications and those of other workers, and to the presentation of data from California native species, not published previously. All previous postulates are borne out by these new data with the exception of positive correlations of a. a. concentration with “primitive” and “advanced” floral characteristics taken one at a time, which appear to be inconsistent and are affected strongly by the nature of the family in which they occur. Summary data are provided for families and genera which indicate that high or low a. a. concentration can typify certain families and genera of both relatively “primitive” and relatively “advanced” nature. Needs for future research on an ecosystem basis are quoted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02430273
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  • 4
    Electronic Resource
    Electronic Resource
    Pollination-related characteristics in the mimosoid legumeAcacia terminalis (Leguminosae) (1987)
    Springer
    Plant systematics and evolution 157 (1987), S. 49-62 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Leguminosae ; Mimosoideae ; Acacia terminalis ; Bee- and bird-pollination ; extrafloral nectaries ; intraspecific variation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Intraspecific variation has been found for several pollination-related characteristics in two isolated populations of the self-incompatible treeAcacia terminalis: floral characteristics including colour and flowering time; style length; size and colour of extrafloral nectaries on the leaf petioles; chemical components of the extrafloral nectar; different taxa of bee pollinators; and frequency differences in bird pollinators. These differences possibly reflect the evolution of two different pollination syndromes within this species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00939180
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  • 5
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    A family of pneumatically-operated thin layer samplers for replicate sampling of heterogeneous water columns (1985)
    Springer
    Details
    Publication Date: 1985-03-01
    Print ISSN: 0018-8158
    Electronic ISSN: 1573-5117
    Topics: Biology
    Published by Springer
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    PAPER CURRENT
  • 6
    Electronic Resource
    Electronic Resource
    Distribution of cetaceans and sea-surface chlorophyll concentrations in the California Current (1986)
    Springer
    Marine biology 91 (1986), S. 385-402 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A census of marine mammals was conducted off the coast of California (USA) in 1979–1980. The distribution of seasurface chlorophyll was determined at the same time by onboard fluorometry and by remote sensing using the Coastal Zone Color Scanner on the Nimbus-7 satellite. Comparisons of species and chlorophyll distributions indicate that marine mammals are not randomly distributed with respect to chlorophyll. Cetaceans were more abundant in the productive coastal waters than in the offshore oceanic waters of the California Current. This supports the hypothesis that the distributions of some cetacean species may be related to the mesoscale features that are manifest in the patterns of chlorophyll as revealed in the satellite imagery. It is suggested that oceanic chlorophyll may be used as a habitat descriptor for selected marine mammals, and that remote sensing will provide complementary data useful in the interpretation of observed distribution patterns of marine mammals and in the estimation of their abundance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00428633
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  • 7
    Electronic Resource
    Electronic Resource
    Optical characterization of primary productivity across a coastal front (1987)
    Springer
    Marine biology 96 (1987), S. 575-591 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Methods for the remote estimation of phytoplankton biomass and production rates using multiplatform sampling strategies are essential for the better understanding of oceanic bio-geochemical cycles. Recent advances in remote sensing of ocean color have made synoptic estimation of phytoplankton biomass attainable. While considerable success has been achieved in the estimation of plant biomass, the synoptic estimation of phytoplankton rates of production has been inadequate. Rapid shipboard estimates of the vertical distribution of primary productivity, on mesoscale spatial scales and event-time scales, are needed to provide both surface validation and data for the development of bio-optical models linking production to the optical characteristics of the water column. This study details the primary productivity and optical properties of a frontal region in July 1985 along 35°50′N in the Southern California Bight which is shown to be consistent with the concurrent high-performance liquid-chromatography pigment-analysis. We describe here a “quasi-synoptic” shipboard bio-optical sampling strategy across a frontal region as an example of time-corrected data for assessing phytoplankton production in highly variable ocean regions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00397976
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  • 8
    Electronic Resource
    Electronic Resource
    On the detection of some elements in the image of the double transfer usingK(2)-theory (1988)
    Springer
    Mathematische Zeitschrift 197 (1988), S. 439-454 
    Details
    ISSN: 1432-1823
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01418341
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  • 9
    Electronic Resource
    Electronic Resource
    On the iterated complex transfer (1988)
    Springer
    Mathematische Zeitschrift 199 (1988), S. 191-207 
    Details
    ISSN: 1432-1823
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01159652
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  • 10
    Electronic Resource
    Electronic Resource
    The effect of ionic stress on photosynthesis in Dunaliella tertiolecta (1985)
    Springer
    Planta 163 (1985), S. 250-256 
    Details
    ISSN: 1432-2048
    Keywords: Chlorophyll fluorescence ; Dunaliella (osmoregulation) ; Osmoregulation ; Photosynthesis (ionic stress)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A comparison of the effects of ionic stress and an uncoupler on long-term fluorescence transients (the ‘Kautsky effect’) in the green alga Dunaliella tertiolecta indicated that the large quenching induced by ionic stress was caused by a pH gradient across the thylakoid membrane. This possiblity was given support by the increase in the slow phase of 3-(3′,4′-dichlorophenyl)-1,1-dimethylurea-induced fluorescence relaxation in algae subjected to ionic stress. Low-temperature fluorescence emission spectra indicated that salt stress enhanced photosystem-I emission in the dark, and a comparison of simultaneous emissions at 695 and 720 nm at room temperature indicated a further increase in photosystem-I emission during the fluorescence transients. Taken together with the decrease in the fast phase of 3-(3′,4′-dichlorophenyl)-1,1-dimethylurea-induced fluorescence relaxation in stressed algae, our results indicate that ionic stress stimulates cyclic electron flow, and that non-cyclic flow is inhibited. The effect of sucrose-induced osmotic stress was similar to, but less marked than, the effects of NaCl and KCl; the effect of decreasing the external salinity was small.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00393515
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