A comparative study of morphometry in shell-bearing molluscs

Seller: ConchBooks, Harxheim, GermanyConchBooks

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A comparative study was conducted on the ontogenetic variation in morphometry of a total of 29 shell-bearing molluscan species occurring on an intertidal stony shore in south-western Japan. The relationships between shell size and total weight and between shell size and flesh weight were all highly significant on logarithmic scales with the slopes having values of about three. The arcsine-transformed proportion of shell weight out of total weight varied among and within different morphological/taxonomic groups, ranging from 58.6% in Acanthochiton defilippi to 76.4% in Nerita albicilla. The allometry of shell weight was analysed by regressing the arcsine transformed values of the proportion of shell weight against total weight in each species. The slope (?) of the regression varied substantially among different taxa, with all three possible cases, i.e. ? > 0, ?? 0 and ? < 0, being observed. Thus, depending on molluscan species, the proportion of shell mass either (1) increases, (2) does not change, or (3) decreases with increasing body mass. Variation in the value of ? was to some extent explained by the proportion of shell mass of young individuals of each species; species with relatively high proportions of shell mass in small individuals tended to have low ? Interspecifically, it was shown that shell mass scaled in proportion to body mass for this assemblage of 29 species. Consideration was given to the theoretical background of variation in shell morphometry, with particular reference to the shell as a defence structure. 8 pp., 5 figs, 4.

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Bibliographic details

Title
A comparative study of morphometry in shell-bearing molluscs
Author
Tokeshi, M., Ota, N. & Kawai, T.
Publication year
2000

ConchBooks

Harxheim, Germany

4-star seller

AbeBooks seller since March 1, 2007

Shipping rates from Germany to U.S.A.

Item25 to 45 business days8 to 14 business days
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Store description

Founded in 1985 we are specialized in worldwide literature on Mollusca and marine invertebrates. Our publishing house has meanwhile published approximately 60 titles on that field of interest. We have stocks of most available international books on Malacology and a huge amount of antiquarian literature, even of the latter most titles are only available once.

Specialty

Weichtiere / Shells, Schnecken / Snails & Slugs, Muscheln / Bivalves, Tintenfische / Squids / Octopusses / Ammonites, Malacology, Conchology, Marine Biology

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ConchBooks

Germany