Control of molting in crustacea

Conference · Fri Jan 01 00:00:00 EST 1982

OSTI ID:5347381

Skinner, D M; Graham, D E; Holland, C A; Mykles, D L; Soumoff, C; Yamaoka, L H

The single, overriding event that occurs during all proecdysial periods in crustaceans is the synthesis of a new exoskeleton that encompasses an enlarged animal when the old shell is cast off. Regeneration of missing appendages and larval or puberty metamorphoses also occur during proecdysis. Proecdysial periods have been divided into substages defined by the occurrence of specific events. Although a number of factors must be postulated to account for individual proecdysial events, only the molting hormone, 20-hydroxyecdysone, has been identified and isolated. Much evidence indicates that the X-organ sinus glands complex, a neurosecretory tissue located in the eyestalks, is the source of a molt inhibiting hormone (MIH) responsible for maintaining animals in anecdysis. An exuviation factor has been proposed to support the extrication of the animal from the old exoskeleton. There is evidence for a limb growth inhibitory factor (LGIF) that affects the rate of growth of regenerating limbs. We are proposing an anecdysial limb autotomy factor (LAF/sub an/) that propels into precocious molts anecdysial limb autotomy factor (LAF/sub pro/) that interrupts the proecdysial period of animals that lose one or more normal or partially regenerated pereopods before a critical time in proecdysis.

• Research Organization: Oak Ridge National Lab., TN (USA); National Institutes of Health, Bethesda, MD (USA); Massachusetts Inst. of Tech., Cambridge (USA); Duke Univ., Durham, NC (USA). Medical Center
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5347381
• Report Number(s): CONF-821269-1; ON: DE84004429
• Resource Relation: Conference: American Society of Zoologists conference, Louisville, KY, USA, 27 Dec 1982; Other Information: Portions are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
BIOLOGICAL REGENERATION
BIOCHEMISTRY
CRUSTACEANS
MOLTING
STEROID HORMONES
THYMIDINE
TRACER TECHNIQUES
TRITIUM COMPOUNDS
ANIMALS
AQUATIC ORGANISMS
ARTHROPODS
AZINES
BIOLOGICAL RECOVERY
CHEMISTRY
HETEROCYCLIC COMPOUNDS
HORMONES
INVERTEBRATES
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
NUCLEOSIDES
NUCLEOTIDES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PYRIMIDINES
RECOVERY
RIBOSIDES
550201* - Biochemistry- Tracer Techniques
550801 - Morphology- Tracer Techniques