Coordination of spermathecal muscle activity with oviposition in Locusta migratoria.

Evidence of a central pattern generator regulating spermathecal muscle activity in Locusta migratoria and its coordination with oviposition.

Electrophysiological recordings were conducted to determine the control of spermathecal contractions during oviposition of interrupted egg-laying locusts, Locusta migratoria. Following transection of the central nervous system below the metathoracic ganglion, rhythmic patterned bursting was detected by extracellular recordings of the nerve N2B2 that innervates the muscles of the spermatheca. Su...

The characteristics of hexokinase from Locusta migratoria muscle.

[Activity and subcellular localization of the enzyme adenyl cyclase in the flight-muscle of Locusta migratoria (author's transl)].

Wanderheuschrecken (Locusta migratoria) veratmen während eines längeren Fluges in den ersten dreißig Minuten vor allem Kohlenhydrate, später Fette1. In ihren Flugmuskeln können sowohl die Enzyme des Fettals auch die des Kohlenhydratabbaues nachgewiesen werden. Außerdem sinkt wäh­ rend des Fluges ihr Gehalt an Glykogen, Trehalose und Glukose2. Humorale, vielleicht auch nervöse Faktoren dürften d...

Evidence for the hormonal function of a CRF-related diuretic peptide (Locusta-DP) in Locusta migratoria

Locusta-DP is a corticotropin-releasing factor (CRF)-related diuretic peptide isolated from the migratory locust Locusta migratoria. At nanomolar concentrations, synthetic Locusta-DP stimulated fluid secretion and cyclic AMP production by Malpighian tubules isolated in vitro and increased the rate of amaranth clearance in starved locusts to levels comparable with those observed during post-feed...

Parental crowding influences life-history traits in Locusta migratoria females.

Parental environments could play an important role in controlling insect outbreaks, provided they influence changes in physiological, developmental or behavioural life-history traits related to fluctuations in population density. However, the potential implication of parental influence in density-related changes in life-history traits remains unclear in many insects that exhibit fluctuating pop...