Functional morphology of mouthparts and digestive system during larval development of the cleaner shrimp Lysmata amboinensis (de Man, 1888)

2011 ◽  
Vol 272 (9) ◽  
pp. 1080-1091 ◽  
Author(s):  
Vasiliki Tziouveli ◽  
Giana Bastos-Gomez ◽  
Orpha Bellwood
Keyword(s):  
Larval Development ◽  
Functional Morphology ◽  
Digestive System ◽  
De Man ◽  
Cleaner Shrimp

scholarly journals The morphology of the foregut of larvae and postlarva of Sesarma curacaoense De Man, 1892: a species with facultative lecithotrophy during larval development

2006 ◽  
Vol 36 (3) ◽  
pp. 375-380 ◽  
Author(s):  
Marlon Aguiar Melo ◽  
Fernando Abrunhosa ◽  
Iracilda Sampaio
Keyword(s):  
Fine Structure ◽  
Larval Development ◽  
Larval Stage ◽  
Filter Press ◽  
Gastric Mill ◽  
Juvenile Stages ◽  
De Man ◽  
Lecithotrophic Development

Previous study on the resistance of larvae of Sesarma curacaoense submitted to starvation has revealed a facultative lecithotrophy during zoeal stages, but megalopa and first juvenile stages are exclusively feeding stages. In the present study, the gross morphology and fine structure of the foregut of S. curacaoense were investigated during larval, megalopa and first juvenile stages. The foregut of the zoea I show specific setae and a filter press apparently functional. The foregut undergoes changes in the zoea II (last larval stage) with increment of setae number, mainly on the cardiopyloric valve and complexity of the filter press. After metamorphosis to megalopa stage the foregut become rather complex, with a gastric mill supporting a medial and two lateral teeth well-developed. The foregut of the first juvenile is more specialized compared to the previous stage, showing similar characteristics of the decapod adults. These results provide further evidence of facultative lecithotrophic development in the larvae of S. curacaoense.

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.

Functional Morphology of the Introvert and Digestive System ofMyzostoma cirriferum(Myzostomida)

1995 ◽  
Vol 76 (4) ◽  
pp. 307-315 ◽  
Author(s):  
Igor Eeckhaut ◽  
Bruno Dochy ◽  
Michel Jangoux
Keyword(s):  
Functional Morphology ◽  
Digestive System

The Cephalocarida, Functional Morphology, Larval Development, Comparative External Anatomy.

1964 ◽  
Vol 13 (1) ◽  
pp. 53
Author(s):  
Kenneth B. Armitage ◽  
Howard L. Sanders
Keyword(s):  
Larval Development ◽  
Functional Morphology
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