Some factors influencing byssus thread production in mytilus edulis (mollusca: Bivalvia) Linnaeus, 1758

1974 ◽  
Vol 3 (2) ◽  
pp. 171-177
Author(s):  
Tena Martella
Keyword(s):  
Mytilus Edulis ◽  
Byssus Thread ◽  
Factors Influencing

Factors Influencing Shell Shape in the Mussel Mytilus Edulis

1968 ◽  
Vol 48 (3) ◽  
pp. 561-584 ◽  
Author(s):  
R. Seed
Keyword(s):  
Mytilus Edulis ◽  
Slow Growth ◽  
Shell Height ◽  
Shell Morphology ◽  
Population Variation ◽  
Shell Shape ◽  
Factors Influencing ◽  
High Incidence ◽  
Local Variability ◽  
Transplantation Experiments

An attempt is made to explain the great variations in gross shell morphology noted in field populations of Mytilus edulis.In any one mussel population, variation in shell form can be attributed to differences in age, old mussels having proportionately heavier shells where width often exceeds shell height. This is invariably accompanied by down-turned, divergent umbones and varying degrees of incurvature of the ventral shell margin.Variations in the age structure of mussel populations from different habitats can also account for local variability in shell morphology. Localities where the life expectancy of mussels is increased due to absence of predators (especially in the upper shore) reveal a high incidence of old ‘ungulate’ individuals, whereas populations in which the mussel turnover is more rapid show a preponderance of relatively young mussels.Shell morphology is greatly influenced by growth rate and density. These probably exert their effect through physical compression which is maximum in localities of fast growth and high density and least in areas of slow growth and low density. High compression leads to an elongate form whereas low compression results in higher, more triangular shaped shells. Growth rates and densities, even within the same habitat, are, however, exceedingly variable.Since all environmental conditions vary in both time and space, wide variation in shell morphology is to be expected, even in animals from the same locality.Transplantation experiments indicate that variation in shell morphology is essentially phenotypic, older animals being more likely to exhibit a form which is characteristic of their particular habitat. Smaller mussels from widely different habitats show remarkable similarity in shell morphology.

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).

Factors influencing the distribution of trematode larvae in blue mussels Mytilus edulis in the North Atlantic and Arctic Oceans

2014 ◽  
Vol 162 (1) ◽  
pp. 193-206 ◽  
Author(s):  
Kirill V. Galaktionov ◽  
Jan O. Bustnes ◽  
Bård-J. Bårdsen ◽  
James G. Wilson ◽  
Kirill E. Nikolaev ◽  
...  
Keyword(s):  
Mytilus Edulis ◽  
North Atlantic ◽  
Blue Mussels ◽  
The North ◽  
Factors Influencing ◽  
The North Atlantic
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