scholarly journals Mechanism of an epibiont burden: Crepidula fornicata increases byssus thread production by Mytilus edulis

2007 ◽  
Vol 73 (1) ◽  
pp. 75-77 ◽  
Author(s):  
David W. Thieltges ◽  
Christian Buschbaum
Keyword(s):  
Mytilus Edulis ◽  
Byssus Thread ◽  
Crepidula Fornicata

Observations on byssus systems in the spat of Cerastoderma glaucum and C. edule

1986 ◽  
Vol 66 (2) ◽  
pp. 277-292 ◽  
Author(s):  
Kobina Yankson
Keyword(s):  
Mytilus Edulis ◽  
Pecten Maximus ◽  
Ostrea Edulis ◽  
Byssus Thread ◽  
Cerastoderma Glaucum ◽  
Early Stages

INTRODUCTIONYonge (1962) suggests a possible universal occurrence of byssal apparatus in the post-larval spat of bivalves. Subsequent studies have revealed that the byssus thread secreted by the post-larval byssal apparatus of many bivalves is involved in settlement as well as migration by means of bysso-pelagic drifting (Sigurdsson, Titman & Davis, 1976; Blok & Tan-Maas, 1977; Board, 1983). Recent studies on the byssus and other foot glands in the early stages of bivalves have included Ostrea edulis (Cranfield, 1973 a, b, c); Pecten maximus (Gruffydd, Lane & Beaumont, 1975); Mytilus edulis (Lane & Nott, 1975; Lane, Nott & Crisp, 1982); and Chlamys varia L. (Gruffydd, Budiman & Nott, 1979)

A study of the morphology, fine structure and histochemistry of the foot of the pediveliger of Mytilus edulis L.

1975 ◽  
Vol 55 (2) ◽  
pp. 477-495 ◽  
Author(s):  
D. J. W. Lane ◽  
J. A. Nott
Keyword(s):  
Fine Structure ◽  
Mytilus Edulis ◽  
Considerable Importance ◽  
Posterior Surface ◽  
Byssus Thread ◽  
Veliger Larva ◽  
Water Layers ◽  
Settlement Site ◽  
Selection Of ◽  
Muscular Action

The development of the planktonic veliger larva of Mytilus edulis L. culminates in a swimming crawling stage during which the foot is of considerable importance in the selection of a settlement site. This stage has been described for many other bivalves (see Bayne, 1965) and has been given the term ‘pediveliger’ by Carriker (1961). The pediveliger of Mytilus edulis is negatively phototactic and positively geotactic during velar swimming (Bayne, 1964b) and is usually confined to water layers close to the substratum. The foot may be protruded during swimming and if it comes into contact with the substratum it adheres and a period of crawling commences. During crawling the larva progresses on the ventral or posterior surface of the foot by means of ciliary and muscular action. Crawling may result in attachment by secretion of the first byssus thread or alternatively the foot is withdrawn and velar swimming is continued until the next exploratory crawling phase. Mytilus larvae attach most readily to filamentous substrates in the field (Blok & Geelen, 1958; Bayne, 1964a).

The Red Neuronal Pigment in the Nervous System of the Mussel, Mytilus Edulis: Localization and Its Effect on Lateral Ciliary Activity with Spectral and Analytical Changes

1981 ◽  
Vol 39 ◽  
pp. 494-495
Author(s):  
Anthony A. Paparo ◽  
Judith A. Murphy
Keyword(s):  
Nervous System ◽  
Mytilus Edulis ◽  
Neuronal Cell ◽  
Ciliary Activity ◽  
Neuronal Cell Bodies ◽  
The Central Nervous System ◽  
Intracellular Organelles ◽  
The Common ◽  
The Individual ◽  
Cryostat Sections

The purpose of this study was to localize the red neuronal pigment in Mytilus edulis and examine its role in the control of lateral ciliary activity in the gill. The visceral ganglia (Vg) in the central nervous system show an over al red pigmentation. Most red pigments examined in squash preps and cryostat sec tions were localized in the neuronal cell bodies and proximal axon regions. Unstained cryostat sections showed highly localized patches of this pigment scattered throughout the cells in the form of dense granular masses about 5-7 um in diameter, with the individual granules ranging from 0.6-1.3 um in diame ter. Tissue stained with Gomori's method for Fe showed bright blue granular masses of about the same size and structure as previously seen in unstained cryostat sections.Thick section microanalysis (Fig.l) confirmed both the localization and presence of Fe in the nerve cell. These nerve cells of the Vg share with other pigmented photosensitive cells the common cytostructural feature of localization of absorbing molecules in intracellular organelles where they are tightly ordered in fine substructures.

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