Hormonal Control of Molting in Decapod Crustacea

The Renal Organs of Certain Decapod Crustacea

Neogene Decapod Crustacea from Southern Chile

Twelve species of Neogene decapod crustaceans are described from late Miocene and early Pliocene deposits in the Valdivia, Osorno-Llanquihue, and Chiloé basins as well as from Mocha Island, offshore from the Temuco Basin, southern Chile. New species of thalassinideans include Ctenocheles notialis and Axianassa? chilensis. Axianassa Schmitt, 1924, has not been reported previously in the fossil r...

Cyclic Nucleotides and Neuropeptide Signaling in the Crustacean Molting Gland Molting in decapod crustaceans is controlled by the eyestalk

Physiological processes are regulated by a diverse array of neuropeptides that coordinate organ systems. The neuropeptides, many of which act through G protein–coupled receptors, affect the levels of cyclic nucleotides (cAMP and cGMP) and Ca in target tissues. In this perspective, their roles in molting, osmoregulation, metabolite utilization, and cardiovascular function are highlighted. In dec...

Hormonal regulation of molting and metamorphosis in Manduca sexta

Manduca sexta has been studied extensively and shown to be primarily under the control of juvenile hormone (JH) and ecdysteroids (reviewed by Nijhout, 1994; Gäde et al., 1997). During larva–larva molts, the release of ecdysteroids signals the end of the feeding stage and the initiation of the molting process, and, in the presence of JH, growth is directed to the expression of larval characteris...

Studies on the Nervous Regulation of the Heart Beat in Decapod Crustacea

The effect of electrical stimulation of cardioaccelerator and cardioinhibitor nerves on the mechanically recorded heart beat of crayfish was studied. Similar experiments were performed with the lobster, Homarus americanus. Quantitative relationships between uni- and bilateral accelerator and/or inhibitor nerve stimulation and the resulting change in frequency and amplitude of the heart beat wer...