The Crustacean Endocrine System and Pleiotropic Chemical Messengers

  • Ernest S. Chang


In this chapter, I first present a brief overview of the hormones (intraorganismal chemical signals) and endocrine glands that have been described in crustaceans. This overview focuses on decapods and the physiological processes of molting, metabolism, reproduction, and pigmentation. The hormones include ecdysteroids (molting hormones), molt-inhibiting hormone, methyl farnesoate, crustacean hyperglycemic hormone, androgenic gland hormone (AGH), and chromatophorotropins. I briefly discuss some of the work on the regulation of crustacean behavior by neurotransmitters, especially in respect to aggressive behavior. Evidence is then presented supporting the role of crustacean hormones as pheromones (intraspecific chemical signals). In particular, I describe the experiments demonstrating that ecdysteroids have pleiotropic activities. These experiments include the observations that ecdysteroids (1) are present in urine in varying amounts over the course of the molt cycle; (2) modulate aggressive behavior in a manner that correlates with hemolymph and urinary hormone levels; and (3) can be detected in the environment by olfactory neurons. There is evidence that the AGH may also act as a mating pheromone. I conclude my chapter by describing how the arthropod molting hormone can act as an allelochemical (interspecific chemical signal) in a pycnogonid (sea spider). Pycnogonids can accumulate high concentrations of ecdysteroids that serve as feeding deterrents against crustaceans that are potential predators.


Green Crab Molt Cycle Female Crab Crustacean Hyperglycemic Hormone Sinus Gland 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



I thank Drs. Assaf Barki and Stuart Cromarty for helpful comments and Ms. Sharon Chang for editorial and laboratory assistance. I also thank my various mentors, collaborators, and students for their creative stimulants. This is contribution No. 2411 from the Bodega Marine Laboratory, University of California at Davis.


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© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  1. 1.Bodega Marine LaboratoryUniversity of California-DavisBodega BayUSA

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