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Digitale Medien

Flight physiology of migrating Urania fulgens (Uraniidae) moths: kinematics and aerodynamics of natural free flight (1990)

Dudley, R. ; DeVries, P. J.

Springer

Journal of comparative physiology 167 (1990), S. 145-154

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ISSN: 1432-1351

Schlagwort(e): Moth ; Flight ; Migration ; Kinematics ; Aerodynamics

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie , Medizin

Notizen: Summary Air speeds and wing kinematics were determined for the Neotropical moth Urania fulgens in natural migratory flight over Lake Gatun, Republic of Panama. Morphological parameters are presented for the same insects filmed in free flight. A quasi-steady aerodynamic analysis was used to show that unsteady mechanisms of lift generation are probably not necessary to produce the forces necessary for fast forward flight. Mechanical power requirements of forward flight were estimated from the biomechanical and morphological data. Over an airspeed range of 1.5 to 4.5 m/s, the mechanical power required to fly is predicted to increase dramatically with forward speed. A comparison of estimated metabolic rates with endogenous lipid reserves suggests that U. fulgens feeds extensively on flower nectar during migration from Central into South America.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00192414

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Digitale Medien

Chemistry of venom alkaloids in the antMegalomyrmex foreli (Myrmicinae) from Costa Rica (1991)

Jones, T. H. ; DeVries, P. J. ; Escoubas, P.

Springer

Journal of chemical ecology 17 (1991), S. 2507-2518

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ISSN: 1573-1561

Schlagwort(e): Megalomyrmex ; Hymenoptera ; Myrmicinae ; venom ; alkaloids ; ants ; pyrrolines ; alarm behavior ; stridulation ; toxicity

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie , Chemie und Pharmazie

Notizen: Abstract Chemical analysis of the venom of the myrmicine antMegalomyrmex foreli from Costa Rica revealed the presence of four major alkaloidal components. Two of these, 2-butyl-5-(E, 1-heptenyl)-5-pyrroline (3) and 2-butyl-5-(E, E, 1,3-heptadienyl)-5-pyrroline (4), constitute a new functional class of ant venom alkaloids, whose structures were assigned from their spectral and chemical behavior and unambiguous syntheses. The function of these compounds is suggested by field observations of the behavior ofM. foreli, its sting morphology, and the relative toxicity of 3 and 4 against termite workers.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00994598

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