Endocrine cells in the gut of the shore crab Carcinus maenas immunoreactive to crustacean hyperglycaemic hormone and its precursor-related peptide

2000 ◽  
Vol 300 (1) ◽  
pp. 193-205 ◽  
Author(s):  
S. G. Webster ◽  
H. Dircksen ◽  
J. S. Chung
Keyword(s):  
Endocrine Cells ◽  
Carcinus Maenas ◽  
Shore Crab ◽  
Related Peptide

scholarly journals Dynamics of in Vivo Release of Molt-Inhibiting Hormone and Crustacean Hyperglycemic Hormone in the Shore Crab, Carcinus maenas

Endocrinology ◽  
2005 ◽  
Vol 146 (12) ◽  
pp. 5545-5551 ◽  
Author(s):  
J. S. Chung ◽  
S. G. Webster
Keyword(s):  
Endocrine Cells ◽  
Carcinus Maenas ◽  
Shore Crab ◽  
Molting Hormone ◽  
Crustacean Hyperglycemic Hormone ◽  
Molt Cycle ◽  
In Vivo Release ◽  
Hyperglycemic Hormone ◽  
Gut Endocrine Cells

Very little is known regarding the release patterns or circulating titers of neuropeptides in crustaceans, in particular those concerned with regulation of molting hormone (ecdysteroid) synthesis, molt-inhibiting hormone (MIH), and crustacean hyperglycemic hormone (CHH), which is also an adaptive hormone, centrally important in carbohydrate metabolism. Furthermore, the currently accepted model of molt control is founded on an untested hypothesis suggesting that molting can proceed only after decline in MIH titer. Accordingly, we measured simultaneous circulating neuropeptide profiles for both MIH and CHH by RIA of purified hemolymph during the molt cycle at fine temporal scale during day/night cycles and seasonally. For CHH we additionally determined release patterns after physiologically relevant stress. Results show that both hormones are released exclusively and episodically, rather than continuously, with notably short half-lives in circulation, suggesting dynamic and short-lived variations in levels of both hormones. During the molt cycle, there are no overt changes in MIH titer, except a massive and unprecedented increase in MIH during late premolt, just before ecdysis. The function of this hormone surge is unknown. Treatment with various stressors (hypoxia, temperature shock) showed that CHH release occurs extremely rapidly, within minutes of stress. Release of CHH after stressful episodes during premolt (when gut endocrine cells synthesize large quantities of CHH) is exclusively from the sinus gland: CHH from the gut is never involved in the stress response. The results show a hitherto unsuspected dynamism in release of MIH and CHH and suggest that currently accepted models of molt control must be reconsidered.

Effects of handling during experimental procedures on stress indices in the green shore crab, Carcinus maenas (L)

2021 ◽  
Vol 54 (2) ◽  
pp. 65-85
Author(s):  
Charlotte H. Wilson ◽  
Sarah J. Nancollas ◽  
Molly L. Rivers ◽  
John I. Spicer ◽  
Iain J. McGaw
Keyword(s):  
Carcinus Maenas ◽  
Shore Crab ◽  
Stress Indices

Biochemical responses of the shore crab (Carcinus maenas) in a eutrophic and metal-contaminated coastal system (Óbidos lagoon, Portugal)

2009 ◽  
Vol 72 (5) ◽  
pp. 1471-1480 ◽  
Author(s):  
Patrícia Pereira ◽  
Hilda de Pablo ◽  
Maria Dulce Subida ◽  
Carlos Vale ◽  
Mário Pacheco
Keyword(s):  
Carcinus Maenas ◽  
Shore Crab ◽  
Coastal System ◽  
Biochemical Responses

Mechanisms of copper toxicity in the shore crab, Carcinus maenas

1992 ◽  
Vol 114 (2) ◽  
pp. 253-257 ◽  
Author(s):  
Jan Ivan Hansen ◽  
Tariq Mustafa ◽  
Michael Depledge
Keyword(s):  
Carcinus Maenas ◽  
Copper Toxicity ◽  
Shore Crab

Effect of copper on ion- and osmoregulation in the shore crab Carcinus maenas

1986 ◽  
Vol 91 (1) ◽  
pp. 69-76 ◽  
Author(s):  
P. Bjerregaard ◽  
T. Vislie
Keyword(s):  
Carcinus Maenas ◽  
Shore Crab ◽  
Effect Of Copper
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