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  • 1
    Electronic Resource
    Electronic Resource
    Determination of the double bond position in monounsaturated acetates from their mass spectra (1985)
    s.l. : American Chemical Society
    Analytical chemistry 57 (1985), S. 1621-1625 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac00285a027
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  • 2
    Electronic Resource
    Electronic Resource
    Orchid pollination by sexual swindle (1999)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 399 (1999), S. 421-421 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The flowers of Ophrys orchids mimic receptive females of usually only one pollinator species. Males of this species are attracted primarily by the odour of a flower and transfer the pollinia during so-called ‘pseudocopulations’ with the flowers. We have found that flowers of O. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/20829
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  • 3
    Electronic Resource
    Electronic Resource
    Sex pheromones and their potential role in the evolution of reproductive isolation in small ermine moths (Yponomeutidae) (1991)
    Springer
    Chemoecology 2 (1991), S. 20-28 
    Details
    ISSN: 1423-0445
    Keywords: speciation ; reinforcement ; character displacement ; biosynthesis ; phylogeny ; sex pheromones ; reproductive isolation (Z)-11-tetradecenyl acetate ; (E)-11-tetradecenyl acetate ; Lepidoptera ; Yponomeutidae ; Yponomeuta
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Sex pheromone communication in the nine European species of small ermine moths (Yponomeuta) is reviewed in regard to the potential role of pheromones in the speciation process. Six of the nine species studied (viz.,Y. evonymellus, Y. cagnagellus, Y. padellus, Y. irrorellus, Y. plumbellus, andY. vigintipunctatus) use a mixture of (E)-11-and (Z)-11-tetradecenyl acetate in different ratios as primary pheromone components, with combinations of tetradecyl acetate, (Z)-9-tetradecenyl acetate, (Z)-11-hexadecenyl acetate and the corresponding alcohols of the acetates as additional pheromone components. Analysis of (Z)- to (E)-11-tetradecenyl acetate ratios produced by individual females of these species demonstrated significant variation among females of all species. However, the ranges of ratios produced byY. cagnagellus, Y. irrorellus, andY. plumbellus, sharing the same host-plant species, spindle tree, did not overlap. Niche separation of all six species mentioned required consideration of at least one additional pheromone component or of temporal aspects. The remaining three species,i.e. Y. malinellus, Y. mahalebellus andY. rorellus, have pheromones that differ qualitatively. Biosynthetic routes to the pheromone components identified are proposed on the basis of fatty acid pheromone precursors found in the pheromone glands. A phylogenetic tree for the genus is constructed based on allozyme frequency data and changes in pheromone composition are superimposed on this tree. We suggest that the ancestral ermine moth pheromone is a mixture of (Z)-11- and (E)-11-tetradecenyl acetate and the corresponding alcohols, and a scenario of how present-day patterns evolved is outlined. The pheromone differences among the three species using spindle tree as their host-plant might have evolved throughreproductive character displacement upon secondary contact between populations that had already diverged genetically in allopatry. Pheromone differences within the so-calledpadellus-complex (includingY. cagnagellus, Y. mahalebellus, Y. malinellus, Y. padellus, andY. rorellus) in which species might have originated sympatrically, may have evolved byreinforcing selection as these species still hybridise and produce viable offspring when confined in cages. The role of pheromones in reproductive isolation amongYponomeuta species is emphasised by (1) the function of pheromone components of some of the species as behavioural antagonists to other species, (2) the cross-attraction under experimental conditions between allochronic species with similar pheromones, and (3) the formation of hybrids in the laboratory between species that are isolated in nature by pheromone differences.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01240662
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  • 4
    Electronic Resource
    Electronic Resource
    Sex pheromones and attractants in the Eucosmini and Grapholitini (Lepidoptera, Tortricidae) (1996)
    Springer
    Chemoecology 7 (1996), S. 13-23 
    Details
    ISSN: 1423-0445
    Keywords: sex pheromone ; synergist ; antagonist ; mate recognition ; reproductive isolation ; chemotaxonomoy ; phylogeny ; evolution ; Lepidoptera ; Tortricidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The geometric isomers (E,E)-, (E,Z)-, (Z,E)-, and (Z,Z)-8,10-dodecadien-1-yl acetate were identified as sex pheromone components or sex attractants in the tribes Eucosmini and Grapholitini of the tortricid subfamily Olethreutinae. Species belonging to the more ancestral Tortricinae were not attracted. Each one isomer was behaviourally active in males ofCydia andGrapholita (Grapholitini), either as main pheromone compound, attraction synergist or attraction inhibitor. Their reciprocal attractive/antagonistic activity in a number of species enables specific communication with these four compounds.Pammene, as well as otherGrapholita andCydia responded to the monoenic 8- or 10-dodecen-1-yl acetates. Of the tribes Olethreutini and Eucosmini,Hedya, Epiblema, Eucosma, andNotocelia trimaculana were also attracted to 8,10-dodecadien-1-yl acetates, but several otherNotocelia to 10,12-tetradecadien-1-yl acetates. The female sex pheromones ofC. fagiglandana, C. pyrivora, C. splendana, Epiblema foenella andNotocelia roborana were identified. (E,E)- and (E,Z)-8,10-dodecadien-1-yl acetate are producedvia a commonE9 desaturation pathway inC. splendana. CallingC. nigricana andC. fagiglandana females are attracted to wingfanning males.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01240633
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  • 5
    Electronic Resource
    Electronic Resource
    Reidentification of the female sex pheromone of the Indian meal moth, Plodia interpunctella: evidence for a four-component pheromone blend (1999)
    Springer
    Entomologia experimentalis et applicata 92 (1999), S. 137-146 
    Details
    ISSN: 1570-7458
    Keywords: Lepidoptera ; Pyralidae ; Plodia interpunctella ; Indian meal moth ; pheromone components ; GC-EAD ; stored-product pest ; behaviour ; flight tunnel ; trapping ; Ephestia kuehniella
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Pheromone gland extracts from calling female Plodia interpunctella contained at least seven compounds that consistently elicited electroantennographic responses from male antennae upon gas chromatographic analysis. Three of these compounds were found to be the previously identified gland constituents, i.e., (Z,E)-9,12-tetradecadienyl acetate (Z9,E12-14:OAc), (Z,E)-9,12-tetradecadienal (Z9,E12-14:Ald) and (Z,E)-9,12-tetradecadienol (Z9,E12-14:OH). A fourth EAD-active compound was identified as (Z)-9-tetradecenyl acetate (Z9-14:OAc). The homologue (Z)-11-hexadecenyl acetate (Z11-16:OAc) was also identified in the extracts, but showed no EAD activity. The identity of all five compounds was confirmed by comparison of GC retention times and mass spectra with those of synthetic standards. In flight tunnel tests there were no significant differences in response of male P. interpunctella to the bait containing all four EAD-active compounds and the responses to female gland extacts. A behavioural assay of different two-compound blends in the flight tunnel showed that only addition of the corresponding aldehyde to the major pheromone component Z9,E12-14:OAc raised the male response. A subtractive assay, however, revealed that the exclusion of any of the compounds from the complete four-compound blend reduced its activity significantly. We thus conclude that the female-produced sex pheromone of P. interpunctella consists of at least four components, i.e., Z9,E12-14:OAc, Z9,E12-14:Ald, Z9,E12-14:OH and Z9-14:OAc. In a field trapping test performed in a storage facility, the four-component blend attracted significantly more males of P. interpunctella than traps baited with Z9,E12-14:OAc alone. In contrast, the highest number of Ephestia kuehniella males was found in the traps baited with this major component, suggesting that the secondary pheromone components contribute to the species specificity of the blend.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003703724011
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  • 6
    Electronic Resource
    Electronic Resource
    Correlated development, organism‐wide asymmetry and patterns of asymmetry in two moth species (1999)
    Springer
    Genetica 105 (1999), S. 81-91 
    Details
    ISSN: 1573-6857
    Keywords: antisymmetry ; correlation ; developmental stability ; dependent development ; fluctuating asymmetry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Understanding the mechanisms that determine the development of a bilaterally symmetrical trait is crucial to the interpretation of patterns of fluctuating asymmetry (FA). Experimental and theoretical studies have indicated that feedback mechanisms both within and between developing traits, may participate in the developmental control of asymmetry. This study provides evidence that naturally occurring patterns of FA are affected by interactions between different traits. We found positive between‐trait correlations in signed FA values for tibia lengths on different legs, but not between wing and tibia FA in two moth species. Further research should investigate if trait functionality is related to this presumed correlated development. An extension of the Rashevsky–Turing model of morphogenesis further showed that correlations between the signed FA values can be generated by feedback mechanisms that regulate growth patterns between traits. We argue that such feedback mechanisms can be expected to be widespread and show that between‐trait correlations in the unsigned FA then become confounded with correlations in the signed FA. In addition, correlated development appeared to invalidate the use of the hypothetical repeatability to translate correlations between the unsigned FA values into correlations in the presumed underlying developmental instability. In conclusion, the presence of an organism‐wide asymmetry, which are most frequently found in morphologically integrated traits, may be even less common than previously thought.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003682110711
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  • 7
    Electronic Resource
    Electronic Resource
    Sex pheromone components ofMamestra suasa: chemical analysis, electrophysiological activity, wind tunnel activity and field tests in two European countries (1986)
    Springer
    Entomologia experimentalis et applicata 42 (1986), S. 291-299 
    Details
    ISSN: 1570-7458
    Keywords: (Z)-11-hexadecenyl acetate ; (Z)-11-hexadecenal ; (Z)-11-hexadecenol ; (Z)-9-tetradecenyl acetate ; hexadecanyl acetate ; Mamestra suasa ; Lepidoptera ; Noctuidae ; sex pheromone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé On a trouvé l'acetoxy-1 hexadécene-11 Z (Z-11-16:Ac), le hexadécene-11 Z al-1 (Z-11-16:Ald), le hexadécene-11 Z ol-1 (Z-11-16:OH) et l'acetoxy-1 hexadécene (16:Ac) dans des extraits de glandes phéromona les des femelles deMamestra suasa. La proportion relative des composés était 100/2/10/5. Tous les quatre composés ont été présents aussi dans les collections d'émanations des femelles en stade d'appel, dans la proportion un peu différente de 100/7/5/5. On n'a détecté aucune trace des tétradécenes al-1 ou d'acetoxy-1 tétradécenes. On a démontré la présence de hexadécenoate-1 methyl, hexadécene-9 Z oate-1 methyl et héxadécene-11 Z oate-1 methyl dans des extraits des glandes, par la méthode de ‘base methanolysis’. On n'a trouvé pas des tétradéceneoates methyl. En éléctroantennographie, Z-11-16:Ac a donné les meilleurs réponses, suivis par l'acetoxy-1 tétradécene-9 Z (Z-9-14:Ac), Z-11-16:Ald et Z-11-16:OH. Dans des études de ‘single sensillum’ les cellules à amplitude grande ont répondu à la stimulation avec de Z-11-16:Ac, cependant les cellules à amplitude petite ont répondu à la stimulation avec des deux composés Z-9-14:Ac et Z-11-16:OH. On a trouvé des cellules sensitives à Z-11-16:Ald dans 1 entre 60 sensilla étudiés. À la chambre de vol, le dose de 0.1 μg d'un mélange de 10:1 de Z-11-16:Ac/Z-11-16:Ald a provoqué les mêmes réponses et à l'intensité pareille comme 3 glandes phéromonales isolées des femelles. En piégeages sur le champs des males en quantité importante ont été capturé par un mélange de 10:1 de Z-11-16:Ac/Z-11-15:Ald en Bulgarie et Hongrie. L'addition de 16:Ac au mélange binaire n'avait aucun effet, cependant l'addition de plus de 1% de Z-11-16:OH ou 0.1% de Z-9-14:Ac a sérieusement diminué les captûres. En comparant des proportions différentes du mélange de l'acetoxy/aldéhyde dans des doses différentes, on a observé les meilleurs captûres avec de la proportion 10:1 et à la dose la plus haute (1 000 μg).
    Notes: Abstract (Z)-11-hexadecenyl acetate (Z-11-16:Ac), (Z)-11-hexadecenal (Z-11-16:Ald), (Z)-11-hexadecenol (Z-11-16:OH) and hexadecanyl acetate (16:Ac) were found in pheromone gland extracts of femaleMamestra suasa (Den. et Schiff.) in the relative amounts 100/2/10/5. All four compounds were also present in collections of aiiborne volatiles from calling females in a 100/7/5/5 ratio. No traces of 14 carbon aldehydes or acetates were detected. In gland extracts the presence of methyl hexadecanoate methyl (Z)-9-hexadecenoate and methyl (Z)-11-hexadecenoate was demonstrated by base methanolysis. No methyl tetradecenoates were detected. In EAG tests Z-11-16:Ac gave the best responses, followed by (Z)-9-tetradecenyl acetate (Z-9-14:Ac) Z-11-16:Ald and Z-11-16:OH. In single sensillum recordings large spike amplitude cells in sensilla responded to Z-11-16:Ac, while small spike amplitude cells to both Z-11-16:OH and Z-9-14:Ac. Cells responding to Z-11-16:Ald were found in one out of 60 sensilla tested. In wind tunnel tests 0.1 μg of a 10:1 blend of Z-11-16:Ac/Z-11-16:Ald evoked the same responses and at a similar intensity as 3 isolated female pheromone glands did. In field tests a 10:1 blend of Z-11-16:Ac/Z-11-16:Ald caught significant numbers of males in both Bulgaria and Hungary. The addition of 16:Ac to the binary blend did not have any effect, while more than 1% of Z-11-16:OH or 0.1% of Z-9-14:Ac dramatically decreased captures. In comparing different ratios of the, acetate/aldehyde blend at different dose levels, best catches were recorded at the 10:1 ratio and at the highest (1000 μg) dose level.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00629317
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  • 8
    Electronic Resource
    Electronic Resource
    Sex pheromone of the cone pyralid Dioryctria abietella (1983)
    Springer
    Entomologia experimentalis et applicata 34 (1983), S. 20-26 
    Details
    ISSN: 1570-7458
    Keywords: Dioryctria abietella ; Cone pyralid ; Lepidoptera ; Pyralidae ; Sex pheromone, (Z,E)-9,11-tetradecadienyl acetate ; Single sensillum recordings ; Electroantennography ; Gas chromatography ; Mass spectrometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé L'analyse en chromatographie gazeuse associée à une détection électroantennographique a montré que l'acétate (Z,E)-9,11-tétradécadiényle (Z,E)-9,11–14:Ac est l'un des composants de la phéromone de Dioryctria abietella Schiff (Lepid.: Pyralidae). Couplage chromatographie en phase gazeuse spectrometrie de masse a montré la présence d'acétate tétradécadiényle avec un spectre de masse et un indice de rétention identiques au Z,E-9,11–14:Ac Un récepteur cellulaire sensible à la fois au Z,E-9,11–14:Ac et à un extrait de la femelle a été identifié sous l'antenne du mâle. Les analyses des antennogrammes et de la cellule isolée ont étayé la caractérisation du composant de la phéromone comme étant Z,E-9,11–14:Ac. Un récepteur cellulaire additionnel sensible à l'acétate (Z.)-9-tétradécadiényle et à l'acétate (Z.E.)-9,12-tétradécadiényle a été trouvé sur l'antenne du mâle, mais il n'était pas activé par l'extrait de la femelle. Sur le terrain Z,E-9,11–14:Ac, présenté seul, attirait des nombres importants de mâles de D. abietella. L'addition de l'acétate (Z)-9-tétradécényle a inhibé l'attraction des mâles par les pièges.
    Notes: Summary Gas chromatographic analyses coupled with electro-antennographic detection indicated that (Z,E)-9,11-tetradecadienyl acetate (Z,E-9, 11–14:Ac) is a pheromone component of the cone pyralid Dioryctria abietella. Gas chromatographic-mass spectrometric analyses confirmed the presence of a tetradecadienyl acetate with mass spectrum and retention index identical to Z,E-9,11–14:Ac. A receptor cell sensitive to both Z,E-9,11–14:Ac and the female extract was identified on the male antenna. An additional receptor cell sensitive to (Z)-9-tetradecenyl acetate and (Z,E)-9,12-tetradecadienyl acetate was found on the male antenna but was not activated by the female extract. In the field Z,E-9,11–14:Ac presented alone attracted significant numbers of male D. abietella. Addition of (Z)-9-tetradecenyl acetate inhibited the attraction of males to traps.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00300895
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  • 9
    Electronic Resource
    Electronic Resource
    Sex pheromones of three small ermine moths found on the European spindle tree (1988)
    Springer
    Entomologia experimentalis et applicata 46 (1988), S. 29-38 
    Details
    ISSN: 1570-7458
    Keywords: Lepidoptera ; Yponomeuta cagnagellus ; Yponomeuta irrorellus ; Yponomeuta plumbellus ; Yponomeuta padellus ; sex pheromone ; reproductive isolation ; gas chromatography ; tetradecyl acetate ; (E)-11-tetradecenyl acetate ; (Z)-11-tetradecenyl acetate ; hexadecyl acetate ; tetradecanol ; (E)-11-tetradecanol ; (Z)-11-tetradecenol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé L'analyse a porté sur les phéromones sexuelles de 3 Yponomeutidae, trouvés en sympatrie sur le fusain. Des expériences sur le comportement de Y. cagnagellus ont montré que la fraction acétate de tétradécyl de la phéromone synergise les fractions connues antérieurement: (E)-11- et (Z)-11-acétates de tétradécényl, lorsque les proportions sont 37/2/100. L'analyse en chromatographie gazeuse d'extraits de glandes à phéromone de Y. irrorellus a mis en évidence, dans les proportions approximatives suivantes 68/56/100/9/6/8/7, de l'acétate de tétradécyl, des (E)-11 et (Z)-11 acétates de tétradécényl, du tétradécanol, des (E)-11 et (Z)-11-tétradécénols, et de l'acétate d'hexadécyl. Un mélange de ces composés a provoqué un vol intégral contre le vent des mâles dans un tunnel à vent et a attiré les mâles dans la nature. L'analyse des extrait de glandes à phéromone de Y. plumbellus a donné de l'acétate de tétradécyl, du (E)-11-acétate de tétradécényl et du (Z)-11-acétate de tétradécényl, dans les proportions: 50/150/100. Une étude par élimination dans la nature a montré que les acétates non saturés étaient les composés fondamentaux de la phéromone. La teneur en (Z)-11-acétate de tétradécényl de la glande à phéromone de Y. plumbellus était d'environ 0.5 ng par femelle, soit approximativement le dixième de celle observée chez les deux autres espèces. Une très faible attraction croisée a été trouvée avec des phéromones totalement synthétisées. Lorsque l'acétate de (E)-11-tétradécényl a été enlevé des phéromones de Y. irrorellus et Y. plumbellus, le reliquat a attiré des nombres significatifs de Y. cagnagellus. Nous en concluons que des mélanges de trois composés ou plus, avec des proportions spécifiques des isomères (E) et (Z), sont indispensables pour une activité complète et pour maintenir un isolement reproductif précopulatoire entre les espèces.
    Notes: Abstract The sex pheromones produced by virgin females of three species of small ermine moths occurring sympatrically on the European spindle tree were analysed by gas chromatography and the synthetic compounds tested against male moths in the laboratory and field. Pheromone gland extracts of Yponomeuta cagnagellus were shown to contain tetradecyl acetate, (E)-11- and (Z)-11-tetradecenyl acetate, tetradecanol, (E)-11- and (Z-11-tetradecenol and hexadecyl acetate in 30/3/100/6/0/7/42) ratio. Wind tunnel bioassays and field tests showed that (E)-11-tetradecenyl acetate primary pheromone components, and that tetradecyl acetate synergised their attractiveness. The alcohols were unimportant in these tests. Analysis of the pheromone gland extracts from Y. irrorellus showed the above components in 68/56/100/9/6/8/17 ratio, and a mixture of these attracted male moths in laboratory and field. Omission of either unsaturated acetate gave unattractive mixtures, and the alcohols were also found to be important for attraction. Pheromone gland extracts from Y. plumbellus were shown to contain the seven components in 46/148/100/20/20/13/25 ratio. Field tests showed that the two monounsaturated acetates are primary pheromone components, and removal of the alcohols had no significant effect. The titre of (Z)-11-tetradecenyl acetate in Y. plumbellus pheromone gland extracts was approximately 0.5 ng per female, one tenth the titre in the other two species. It is concluded that mixtures of three or more pheromone components with specific E/Z ratio are essential for full attraction and contribute towards premating reproductive isolation of the three species. Other factors such as rate of pheromone emission, time of flight and height of flight may also contribute to reproductive isolation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00186997
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  • 10
    Electronic Resource
    Electronic Resource
    Population variation and genetic control of pheromone communication systems in moths (1990)
    Springer
    Entomologia experimentalis et applicata 54 (1990), S. 199-218 
    Details
    ISSN: 1570-7458
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The nature of variation in moth pheromone communication systems and its genetic control is critical for the evolution of these systems and for their role in mate-finding and reproductive isolation. Significant additive genetic variance has been demonstrated in female pheromone production in monomorphic populations. However, corresponding variance in male pheromone response with respect to the blend which is most active, appears to be low, as can be expected from the general asymmetry of sexual selection. Pheromone polymorphism and differences in communication systems between closely related species seem to be controlled by a small number of Mendelian genes. The critical biosynthetic steps, which are influenced by the genes controlling pheromone production, can be inferred from our present knowledge of pheromone biosynthesis. A mechanistic understanding of how male response to pheromones is controlled is further away. Failure to demonstrate genes with pleiotropic effects on critical sender and receiver traits, suggests that reciprocal selection on genetically independent sender and receiver loci is the more likely explanation for the generally observed coordination between pheromone production and response in moth populations. Further research on the evolutionary significance of Z-linked pheromone response genes, documented in several species, should be encouraged. Investigations, in the field, of populations that vary in pheromone production and response, and theoretical and empirical studies of the survival of sender and receiver mutants in otherwise monomorphic populations are also important to advance our understanding of how pheromone communication systems evolve.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00186789
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