The role of differences in trematode invasion of male and female viviparids (Mollusca, Gastropoda, Viviparidae) of Central Polesia in reproduction of their populations

E.I. Uvayeva a*, G.Kh. Shcherbina b**, E.D. Shimkovich c***

aZhytomyr Polytechnic State University, Zhytomyr, 10005 Ukraine

bPapanin Institute for Biology of Inland Waters, Russian Academy of Sciences, Borok, 152742 Russia

cKazan Federal University, Kazan, 420008 Russia

E-mail: *uvaevaalena@gmail.com, **gregory@ibiw.yaroslavl.ru, ***edshimkovich@kpfu.ru

Received March 25, 2019

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DOI: 10.26907/2542-064X.2020.1.151-161

For citation: Uvayeva E.I., Shcherbina G.Kh., Shimkovich E.D. The role of differences in trematode invasion of male and female viviparids (Mollusca, Gastropoda, Viviparidae) of Central Polesia in reproduction of their populations. Uchenye Zapiski Kazanskogo Universiteta. Seriya Estestvennye Nauki, 2020, vol. 162, no. 1, pp. 151–161. doi: 10.26907/2542-064X.2020.1.151-161. (In Russian)

Abstract

Trematode invasion of Viviparus viviparus (Lіnné, 1758) and V. contectus (Millet, 1813) populations from the region of Central Polesia (Ukraine) was analyzed. It was revealed that the total rates of trematode (parthenitae and larvae) infection in the viviparid populations under study differ between males and females. Age-related differences were also found: the trematode prevalence was higher in younger female and older male viviparids. It was suggested that differences in the infection rates of male and female molluscs by trematodes is a way to effectively control the parasite–host interaction at the population level in order to hold up the stability of host reproduction. The obtained results demonstrate that the viviparid populations maintain a high reproduction level, because trematodes infect such age and gender groups that are least important in the reproduction process.

Keywords: Viviparus viviparus, V. contectus, gender, age, reproduction, trematodes, invasion prevalence

Figure Captions

Fig. 1. Gender ratio (proportion of males) in different age groups of V. viviparus (a) and V. contectus (b): X-axis – age (years); Y-axis – the proportion of males (%).

Fig. 2. Fecundity of V. viviparus (a) and V. contectus (b) females in the water bodies of Central Polesia: X-axis – age (years); Y-axis – individual fecundity (emb./female).

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