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  • 1
    Electronic Resource
    Electronic Resource
    Analysis of chemicals from earthworms and fish that elicit prey attack by ingestively naive garter snakes (Thamnophis) (1990)
    Springer
    Journal of chemical ecology 16 (1990), S. 67-77 
    Details
    ISSN: 1573-1561
    Keywords: Chemoreception ; garter snakes ; Thamnophis sirtalis ; chemical cues ; Lumbricus terrestris ; earthworm ; Pimephales promelas ; fish ; prey odors ; glycopeptide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Materials previously shown to elicit increased tongue-flicking and prey attack in garter snakes (Thamnophis sirtalis) were isolated from both earthworms (Lumbricus terrestris) and fish (Pimephales promelas). Both high- and low-molecular-weight components from earthworms and fish stimulated attacks and increased tongue-flicking in previously unfed neonate garter snakes relative to distilled water controls. Earthworm collagen was also effective, but even concentrated fractions were less effective than raw extract. Conflicting reports on the effectiveness of collagen suggest that the salient chemical(s) is a smaller molecule tightly bound to collagen and resisting standard purification methods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01021268
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  • 2
    Electronic Resource
    Electronic Resource
    Comparison of earthworm- and fish-derived chemicals eliciting prey attack by garter snakes (Thamnophis) (1988)
    Springer
    Journal of chemical ecology 14 (1988), S. 855-881 
    Details
    ISSN: 1573-1561
    Keywords: Chemoreception ; garter snakes ; Thamnophis sirtalis ; chemical cues ; vomeronasal system ; Lumbricus terrestris ; Pitnephales promelas
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Materials eliciting increased tongue flicking and prey attack in garter snakes were isolated from both earthworm and fish prey. New extraction methods based on chloroform-methanol mixtures are valuable adjuncts to the more typical aqueous preparations. Both high- and low-molecular weight components from earthworms and fish were active. The similarity between the active chemicals in these two classes of prey was established using several methods of analysis. These included chromatography, carbohydrate and amino acid analyses, and nuclear magnetic resonance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01018779
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    Paper (German National Licenses)
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