Subject(s)
Astacoidea/physiology , Hydrocarbons/blood , Lipids/blood , Periodicity , Animals , Hemolymph/analysis , Phospholipids/blood , Triglycerides/bloodABSTRACT
Like other fatty oils from plants, olive and peanut oils, the most commonly used vehicles for the injection of juvenile hormone and its analogs, contain substances that show effects similar to those of this hormone. A dose of olive oil smaller than that used to dissolve a single injection of juvenile hormone will cause nuclear enlargement in the cells of the prothoracic gland of the desert locus and advance the succeeding molt.
Subject(s)
Endocrine Glands/cytology , Insecta/growth & development , Invertebrate Hormones/pharmacology , Metamorphosis, Biological/drug effects , Neurosecretion , Oils/pharmacology , Pharmaceutical Vehicles , Animals , Cell Nucleus/drug effects , Drug Synergism , Endocrine Glands/drug effects , Ethanol/pharmacology , Gibberellins/pharmacology , Juvenile Hormones/pharmacology , KaryometrySubject(s)
Brain/physiology , Ecdysone/metabolism , Endocrine Glands/physiology , Insecta/physiology , Invertebrate Hormones/physiology , Neurosecretion , Animals , Cell Nucleus , Decerebrate State/physiopathology , Endocrine Glands/cytology , Endocrine Glands/surgery , Homeostasis , Metamorphosis, Biological , RNA/biosynthesisSubject(s)
Adipose Tissue/metabolism , Insecta/metabolism , Protein Biosynthesis , Adipose Tissue/analysis , Animals , Brain/physiology , Carbon Isotopes , Ethanol/pharmacology , Female , Gibberellins/pharmacology , Hormones/pharmacology , In Vitro Techniques , Insecta/growth & development , Leucine/metabolism , Methods , Neurosecretion , Proteins/analysis , RNA/analysis , RNA/biosynthesis , Stimulation, ChemicalABSTRACT
Temporary rainpools near Khartoum, Sudan, are inhabited by the notostracan crustacean Triops which completes its life cycle within 4 weeks. The annual rains fall in late summer, and throughout the winter and early summer the eggs of Triops remain in the dried mud or dust where they may be exposed to temperatures up to 80 degrees C. Laboratory experiments show that they can withstand temperatures up to within 1 degrees C of boiling, but are killed in partial vacuum by 70 degrees C, at atmospheric pressure by 100 degrees C, or under pressure by 105 degrees C. Exposure to high temperature seems to be necessary to break the egg diapause.
Subject(s)
Crustacea , Hot Temperature , Ovum , Animals , Atmospheric Pressure , Desert Climate , Female , Pressure , SudanSubject(s)
Acclimatization , Arthropods/physiology , Mollusca/physiology , Oxygen Consumption , Temperature , AnimalsABSTRACT
Bracken contains ecdysone derivatives that are active when injected into locusts. However, when fed to the desert locust as its sole or chief diet, it does not affect molting, growth, or development. There is evidence that, in locusts, the active ecdysones are dehydroxylated to (alpha)-ecdysone and passed out through the gut in the feces. There is no evidence for any uptake of ecdysones from the gut.
