Journal ArticleDOI
Studies on the digestive cycle of the shore crab Carcinus maenas (L.) with special reference to the b cells in the hepatopancreas
S. P. Hopkin,J. A. Nott +1 more
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Aspects of the digestive cycle of Carcinus maenas have been studied by transmission and scanning electron microscopy, X-ray microanalysis and light microscopy.Abstract:
Aspects of the digestive cycle of Carcinus maenas have been studied by transmission and scanning electron microscopy, X-ray microanalysis and light microscopy. Movements of ingested material have been followed by feeding the crabs with Mytilus edulis (L.) labelled with colloidal particles of gold or thorium oxide.read more
Citations
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Journal ArticleDOI
Uptake and retention of microplastics by the shore crab Carcinus maenas.
Andrew J. R. Watts,Ceri Lewis,Rhys M. Goodhead,Stephen J. Beckett,Julian Moger,Charles R. Tyler,Tamara S. Galloway +6 more
TL;DR: Ventilation is identified as a route of uptake of microplastics into a common marine nonfilter feeding species through inspiration across the gills and the gut.
Journal ArticleDOI
Mechanisms of heavy metal cation homeostasis in marine invertebrates
Aldo Viarengo,J. A. Nott +1 more
TL;DR: The biochemical characteristics of metallothioneins and the relationship between their amino acid composition and heavy metal binding capacity are elucidated, and data are reported concerning the sequestration of heavy metal cations in insoluble granules as a mechanism of metal detoxification.
Journal ArticleDOI
The form and function of metal-containing ‘granules’ in invertebrate tissues
TL;DR: In this paper, the authors describe the formation of metal-containing granules and the variation in composition of these granules over the course of their lifetime, and discuss the role of granule function in the formation and composition of such granules.
Book ChapterDOI
4 – Functional Aspects of Nutrition and Digestion
William Dall,David J.W. Moriarty +1 more
Book ChapterDOI
Protein Turnover in Ectotherms and Its Relationships to Energetics
TL;DR: The aim of this chapter is to review the data which have recently become available on the rates of protein synthesis in ectotherms and attempt to integrate them with the likely energy cost of synthesising these proteins.
References
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Journal ArticleDOI
Observations on the feeding mechanism, structure of the gut, and digestive physiology of the european lobster Homarus gammarus (L.) (Decapoda: Nephropidae)
P.L. Barker,Ray Gibson +1 more
TL;DR: Investigation of the feeding mechanism, structure of the gut, and digestive physiology of the European lobster Homarus gammarus has shown that the mandibles do not possess a masticatory function, merely serving to grip food morsels during the tearing process effected by the pulling action of the third maxillipeds.
Journal ArticleDOI
Calcium phosphate granules in the hepatopancreas of the blue crab callinectes sapidus
TL;DR: The hepatopancreas of the adult male blue crab Callinectes sapidus in intermolt was found to contain substantial amounts of calcium, magnesium, and inorganic phosphorus, averaging about 260, 20, and 250 µg-atoms per g wet tissue, respectively, accounting for over 10% of the tissue dry weight.
Journal ArticleDOI
Interpretation of crayfish hepatopancreatic function based on fine structural analysis of epithelial cell lines and muscle network.
TL;DR: The ultrastructure of R, F, and B-cells and of the myoepithelial network in crayfish hepatopancreas tubules was studied as a basis for the functional interpretation of hepatopANCreatic digestive activity.
Journal ArticleDOI
Some observations on concentrically structured, intracellular granules in the hepatopancreas of the shore crab Carcinus maenas (L.)
S. P. Hopkin,J. A. Nott +1 more
TL;DR: Observations with the scanning electron microscope on freeze fractured tubules show that the further R cells are situated from the distal end of the tubule, the greater is the mean diameter of the granules that they contain.
Journal ArticleDOI
Observations on the structure of the mouthparts, histology of the alimentary tract, and digestive physiology of the mud crab Scylla serrata (Forskål) (Decapoda: Portunidae)
P.L. Barker,Ray Gibson +1 more
TL;DR: Acid and alkaline phosphatases occur in the hepatopancreatic cells and are apparently concerned with several stages in the digestive cycle, including the synthesis and secretion of digestive enzymes, the subsequent absorption of the products of extracellular digestion, and the active transport of metabolites across the cell membranes.
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Interpretation of crayfish hepatopancreatic function based on fine structural analysis of epithelial cell lines and muscle network.
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