scholarly journals Effects of specific light wavelengths on osmotic stress in the ornamental cleaner shrimp Lysmata amboinensis (De Man, 1888) (Decapoda: Caridea: Lysmatidae)

2018 ◽  
Vol 38 (4) ◽  
pp. 475-482 ◽  
Author(s):  
Ji Yong Choi ◽  
Jong Ryeol Choe ◽  
Jeongrack Koh ◽  
Cheol Young Choi
Keyword(s):  
Osmotic Stress ◽  
De Man ◽  
Cleaner Shrimp

Effects of 17β-estradiol injection and red-spectrum light on eyestalk hormones and vitellogenesis of the ornamental cleaner shrimp Lysmata amboinensis (De Man, 1888) (Decapoda: Caridea: Lysmatidae)

2019 ◽  
Author(s):  
Ji Yong Choi ◽  
Cheol Young Choi ◽  
Min-Min Jung
Keyword(s):  
Mrna Expression ◽  
Red Light ◽  
Crustacean Hyperglycemic Hormone ◽  
Eyestalk Ablation ◽  
Vitellogenin Receptor ◽  
Hyperglycemic Hormone ◽  
17Β Estradiol ◽  
De Man ◽  
Cleaner Shrimp

Abstract We analyzed the effects of 17β-estradiol (E2) injection and red light on the sexual maturation and vitellogenesis of the cleaner shrimp Lysmata amboinensis (De Man, 1888) by measuring the change of mRNA expression levels of eyestalk and vitellogenesis-related hormones induced by both factors. We examined the eyestalk crustacean hyperglycemic hormone (CHH) and vitellogenesis-inhibiting hormone (VIH) genes. The E2 injection did not affect changes of eyestalk hormones. The red light, however, caused a significant increase (P < 0.05) of CHH promoting maturity and a significant decrease of VIH, which suppressed vitellogenesis. The vitellogenin receptor (VTG-R) and mRNA expression (in situ hybridization) also caused the E2 injection and red-wavelength irradiation to induce synthesis of vitellogenin (VTG). Red-light-induced gonadal maturation, promoting hormone and VTG synthesis, but E2 did not change the eyestalk hormone. Red-light irradiation could thus be used as a novel, maturity-promoting alternative method in the culture of the species, which is different from the eyestalk-ablation method that has so far been used.

The Disfigured Savage: Rousseau and De Man

1985 ◽  
Vol 24 (1) ◽  
pp. 1-14
Author(s):  
Judith Still
Keyword(s):  
De Man
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