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  • reproduction  (3)
  • 1995-1999  (1)
  • 1990-1994  (1)
  • 1985-1989  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Behavioral and Sublethal Effects of Structurally Related Lower Terpenes onMyzus persicae (1997)
    Springer
    Journal of chemical ecology 23 (1997), S. 1641-1650 
    Details
    ISSN: 1573-1561
    Keywords: Myzus persicae ; Homoptera:Aphididae ; lower terpenes ; settling behavior ; probing ; reproduction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The sesquiterpenes farnesol, caryophyllene oxide, and 2,10-bisaboladien-1-one (patent #9602748) and the monoterpenes citronellol and geraniol were tested for settling inhibition and chronic effects on the aphidMyzus persicae by means of an improved leaf-disk assay. Of these compounds, geraniol, famesol, and the natural bisabolene significantly inhibit settling in choice tests. Furthermore, application of the bisabolene to intactCapsicum annuum leaves did not cause phytotoxicity, but did affect the insects' probing behavior by decreasing the probing activity and the number of intracellular punctures. Both compounds significantly decreased offspring production. Of the compounds tested, the natural product bisabolene could be a promising lead for future development of aphid control agents.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/B:JOEC.0000006428.00568.c5
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  • 2
    Electronic Resource
    Electronic Resource
    Annual cycle of plasma insulin and glucose of sea bass.Dicentrarchus labrax, L. (1987)
    Springer
    Fish physiology and biochemistry 4 (1987), S. 137-141 
    Details
    ISSN: 1573-5168
    Keywords: insulin ; glucose ; plasma ; annual cycle ; sea bass ; Dicentrarchus labrax ; size ; weight ; reproduction ; brackish water ; seawater
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Annual plasma insulin and glucose cycles were studied inDicentrarchus labrax maintained in either seawater (37.8‰) or brackish water (3.5‰). In both media, the highest insulin levels were found during the prespawning period (August–November) coincident to increases in weight and a decrease in plasma glucose. During spawning (December–April) and postspawning (May–July) periods, the decrease in insulin occurred at the same time as a reduction in growth and an increase of plasma glucose. Temperature and salinity conditions impeded spawning in the brackish water group, in which a minor weight loss was regained more quickly than in the sea water group; insulin levels were also higher.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02110880
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  • 3
    Electronic Resource
    Electronic Resource
    Fecundity, reproduction, and growth of Moina macrocopa fed different algae (1991)
    Springer
    Hydrobiologia 222 (1991), S. 49-55 
    Details
    ISSN: 1573-5117
    Keywords: Moina macrocopa ; survival ; reproduction ; fecundity ; culture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Three micro algae, Ankistrodesmus convolutus, Scenedesmus incrassatulus and Chlorella vulgaris, at three concentrations, were tested as diets for Moina macrocopa. Their effect on reproduction, fecundity, growth and survival was evaluated. All three algae satisfied the nutritional requirements of M. macrocopa, despite their difference in size. The best concentration, expressed in dry weight, was 5 mg l−1 for all three. Time to first reproduction was 4 days with all diets. Average time between clutches was 33 hours, and maximum number of clutches was 12; the highest average number of offspring per brood was 27. The largest broods were the fourth to sixth, depending on the diet. Ephippium hatching depends on temperature, taking only 24 hours at 30 °C and 48 hours at 27 °C. This species could be an important test organism in aquatic bioassays, and a live food in aquaculture.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00017499
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