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О журнале

Quantification of mantle attachment scars on the Margaritifera margaritifera (Margaritiferidae, Bivalvia) shell. P. 81–86

Версия для печати

Рубрика: Biology

УДК

57.012.2; 57.018.4; 57.063.7; 591.4; 594.1

DOI

10.3897/issn2541-8416.2019.19.1.81

Сведения об авторах

AA Zotin1, EP Ieshko2
1 Koltzov Institute of Developmental Biology of Russian Academy of Sciences (Moscow, Russian Federation)
2 Institute of Biology of Karelian Research Centre, Russian Academy of Sciences (Petrozavodsk, Respublica Karelia, Russian Federation)
Corresponding author: Aleksey Zotin (zotin@idbras.ru)

Аннотация

A characteristic feature shared by all Margaritiferidae mussels consists in the presence of scars on the internal surface of their shells. These scars mark places of mantle attachment by specific epithelial cells. According to some authors, such parameters of mantle attachment scars as the density and degree of their manifestation can be used for the purposes of species identification. To this end, quality indicators (numerous or few, pronounced or poorly visible scars) are typically used; however, the use of quantitative criteria is preferable. This work was aimed at developing quantitative indicators of mantle attachment scars in the Margaritifera margaritifera freshwater pearl mussels for the populations of the Syuskyuyanyoki and Livoyoki rivers (Karelia). It is shown that the density and size of mantle attachment scars are approximately the same for all the investigated shell samples. These parameters display the absence of dependence on the age and size of molluscs. The regression coefficients for the linear dependence of the density or size of mantle attachment scars on the age or length of the shell show no significant difference from 0. For all the investigated molluscs, the density and size of mantle attachment scars are established to vary within the range of 0.37–1.16 scars/cm2 (0.71 ± 0.03 scars/cm2 on average) and 215–690 μm (417 ± 2 μm on average), respectively. According to a two-factor analysis of variance, the distribution of mantle attachment scars appears to be irregular across the shell surface. At the same time, a significant (p < 0.001) increase in their density is observed in the posterior and ventral directions, as well as diagonally in the posterior ventral direction. Issues associated with the application of the investigated parameters for the purposes of mollusc species identification are discussed.

Ключевые слова

bivalve mussels, density of mantle attachment scars, freshwater pearl mussels, Livoyoki river, Syuskyuyanyoki river
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