The Molting Cycle of the Spiny Lobster, Panulirus Argus Latreille. Ii. Pre-Ecdysial Histological and Histochemical Changes in the Hepatopancreas and Integumental Tissues

Travis, Dorothy F.

doi:10.2307/1538400

Cited by 215 publications

(102 citation statements)

References 26 publications

(22 reference statements)

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“…The esocuticle is the thickest layer in Penaeus monodon, a deviation from other reports on the crusta-cean exoskeleton where the endocuticle was found to b e the thickest (Travis 1955, 1963, Trav~s & Friberg 1963, Roer & Dillaman 1984. The exocuticle in the present work comprises about 57 to 62 % of the total exoskeleton thickness, as also observed by Dall (1965) in Metapenaeus sp.…”

Section: Exocuticlecontrasting

confidence: 75%

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Histopathology of the chronic soft-shell syndrome in the tiger prawn Penaeus mondon

Baticados¹,

Coloso²,

Duremdez³

1987

Dis. Aquat. Org.

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One of the disease problems that affect the production of tiger prawn Penaeus monodon Fabricius in brackish-water ponds is the chronic soft-shell syndrome, a condition in which the prawn shell is persistently soft for several weeks. To determine the extent of damage in affected prawns, the histopathology of this syndrome was studied using light microscopy, transmission and scanning electron microscopy, and histochemical determination of calcium. Light microscopic studies of the exoskeleton of soft and normal hard-shelled prawns showed several distinct layers: an outer epicuticle, a thick exocuticle and a thinner endocuticle overlying the epidermis. The cuticular layers of the soft shell often had a rough or wrinkled surface and were usually disrupted and separated from the epidermis while those of the hard shell were generally intact and attached to the epidermis. The exocuticle and endocuticle of the hard shell were considerably thicker than those of the soft shell. Ultrastructural observations revealed the presence of a very thin membranous layer under the endocuticle. Tegumental ducts and pore canals traversed the 4 cuticular layers and were distinctly observed as pore openings on the epicutlcle surface. The epicuticle had a bilaminar and non-lamellate structure. The exocuticle had more wldely-spaced lamellae consisting of fibers arranged In a more compact pattern than in the endocutlcle Hjstochemical determination of calcium was done In exoskeleton and hepatopancreas of soft-and hard-shelled prawns. The hepatopancreas of soft-shelled prawn stained more intensely for calcium than that of the hard-shelled one. There was no great difference in calcium content of hard and soft shell, although the former stained slightly more intensely. Histopathological changes in the hepatopancreas of soft-shelled prawns were also observed.

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Section: Exocuticlecontrasting

confidence: 75%

“…wherein this layer comprised 52 to 55 % of the exoskeleton thickness. This layer is composed of chitin-protein fibers (Richards 1951in Dall 1965, Travis 1955 and acid mucopolysaccharides (Travis 1963) and is hardened by calcificahon a n d compounding of organic components (Travis 1955(Travis , 1965.…”

Section: Exocuticlementioning

confidence: 99%

Histopathology of the chronic soft-shell syndrome in the tiger prawn Penaeus mondon

Baticados¹,

Coloso²,

Duremdez³

1987

Dis. Aquat. Org.

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“…The cuticle is comprised of four distinct layers that differ in structure, composition, and mechanical properties. The outermost layer is the epicuticle, which is thin and mineralized [134]. As this is the outermost layer, one of its primary functions is a barrier to the external environment.…”

Section: Crustacean Exoskeletonsmentioning

confidence: 99%

Structure and mechanical properties of selected protective systems in marine organisms

Naleway

Taylor

Porter

et al. 2016

Materials Science and Engineering: C

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“…It was previously observed that decapods, which do not develop gastroliths, can store, in other storage sites such as hepatopancreas or haemolymph, not only calcium and carbonate but also phosphate ions used for the mineralization of each new cuticle (Becker et al, 1974;Corrêa, 2002Corrêa, , 2009Sparkes and Greenaway, 1984;Travis, 1955).…”

Section: Discussionmentioning

confidence: 99%

High-resolution structural and elemental analyses of calcium storage structures synthesized by the noble crayfish Astacus astacus

Luquet

Salomé

Ziegler

et al. 2016

Journal of Structural Biology

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International audienceDuring premolt, crayfish develop deposits of calcium ions, called gastroliths, in their stomach wall. The stored calcium is used for the calcification of parts of the skeleton regularly renewed for allowing growth. Structural and molecular analyses of gastroliths have been primarily performed on three crayfish species, Orconectes virilis, Procambarus clarkii, and more recently, Cherax quadricarinatus. We have performed high-resolution analyses of gastroliths from the native noble crayfish, Astacus astacus, focusing on the microstructure, the mineralogical and elemental composition and distribution in a comparative perspective. Field emission scanning electron microscopy (FESEM) and atomic force microscopy (AFM) observations showed a classical layered microstructure composed of 200-nm diameter granules aligned along fibers. These granules are themselves composed of agglomerated nanogranules of 50 nm-mean diameters. Denser regions of bigger fused granules are also present. Micro-Raman spectroscopy show that if A. astacus gastroliths, similarly to the other analyzed gastroliths, are mainly composed of amorphous calcium carbonate (ACC), they are also rich in amorphous calcium phosphate (ACP). The presence of a carotenoid pigment is also observed in A. astacus gastrolith contrary to C. quadricarinatus. Energy-dispersive X-ray spectroscopy (EDX) analyses demonstrate the presence of minor elements such as Mg, Sr, Si and P. The distribution of this last element is particularly heterogeneous. X-ray absorption near edge structure spectroscopy (XANES) reveals an alternation of layers more or less rich in phosphorus evidenced in the mineral phase as well as in the organic matrix in different molecular forms. Putative functions of the different P-comprising molecules are discussed

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The Molting Cycle of the Spiny Lobster, Panulirus Argus Latreille. Ii. Pre-Ecdysial Histological and Histochemical Changes in the Hepatopancreas and Integumental Tissues

Cited by 215 publications

References 26 publications

Histopathology of the chronic soft-shell syndrome in the tiger prawn Penaeus mondon

Histopathology of the chronic soft-shell syndrome in the tiger prawn Penaeus mondon

Structure and mechanical properties of selected protective systems in marine organisms

High-resolution structural and elemental analyses of calcium storage structures synthesized by the noble crayfish Astacus astacus

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