Shell morphology of the unionid mussels (Anodonta anatina, Unio pictorum and U. tumidus) in relation to gender and trematode parasitism
Freshwater mussels (Unionoida) show great variability in shell morphology which can be associated with differences in habitat, sex and/or parasite infection. Three unionid mussel species, (Anodonta anatina, Unio pictorum and Unio tumidus) were collected from two sites Lake Saravesi, (Laukaa) and Lake Kuivasjarvi, (Oulu), between May - October 2012. Intraspecific trends that were associated with the mussels’ sex and/or parasites infection were studied and observations were made on how sex and parasite infection could have a role in shells morphological characters/patterns. The study revealed a range of morphometric differences among and across populations, as well as, within and between species. The hypothesis that female growth would decrease relative to males at adult ages due to energetic cost of glochidium larvae production did not receive unequivocal support. In addition, the hypothesis of adult female shells being wider (more inflated) than that of males due to space requirements by carried glochidia was also supported only in A. anatina of Lake Kuivasjärvi but not in Lake Saravesi, or in other mussel species. Male A. anatina were higher than females in Lake Saravesi, but not in Lake Kuivasjärvi, or in other mussel species, except for U. pictorum, in which females were higher than males among the large individuals. Between species, A. anatina had the highest shell, followed by U. tumidus and U. pictorum, while U. tumidus had the widest shell, followed by U. pictorum and A. anatina. The hypothesis of trematode infected mussels being wider due to space requirements by growing parasites was supported partly: mussels infected by R. fennica were, indeed, wider than the uninfected individuals, but for mussels infected with R. campanula this pattern was not found. On the other hand, R. campanula–infected individuals were relatively longer (more elongated) than the uninfected mussels. This may indicate a parasite species specific interaction between parasitism and host mussel shell morphology.
...
Keywords
Metadata
Show full item recordCollections
- Pro gradu -tutkielmat [29367]
Related items
Showing items with similar title or keywords.
-
Connection between temperature, larval production, virulence and geographical distribution of Rhipidocotyle parasites infecting the duck mussel, Anodonta anatina
Choo, Jocelyn M. (University of Jyväskylä, 2015)In this thesis, two bucephalid trematode parasites Rhipidocotyle campanula and R. fennica, which use the same first (Anodonta anatina) and second intermediate (Rutilus rutilus) host were studied. The aim was to investigate ... -
The effect of temperature on cercariae production of two Rhipidocotyle trematodes parasitizing freshwater mussel, Anodonta anatina.
Alabi, Waidi (2013)Two bucephalid trematodes, Rhipidocotyle campanula and R. fennica are known to infect the duck mussel, Anodonta anatina. The infection will lead to decrease growth, reproduction and survival of A. anatina. Given the important ... -
Morphological variation of the unionidae mussel Anodonta anatina
Girgibo, Nebiyu (2013)ABSTRACT Morphology of a given species can vary among individuals, morphology differences can be found between populations males can be different from females (sexual dimorphism) or e.g. with young and old individuals. ... -
Efficacy of Anodonta anatina mussel in filtering Flavobacterium columnare
Hajisafarali, Mahsa (2018)In this study the ability of the common freshwater mussel Anodonta anatina, to filter Flavobacterium columnare in comparison to their ability to capture algal cells (commercial phytoplankton product), was investigated. The ... -
Reproduction cycle, trematode parasitism and growth of freshwater mussel Anodonta anatina (Bivalvia: Unionidae)
Abdelsaleheen, Olfat; Taskinen, Jouni; Kekäläinen, Jukka; Kortet, Raine (Springer, 2024)Anodonta anatina, a widely distributed Eurasian freshwater mussel, has dramatically declined and listed as endangered species in IUCN Red List in some parts of the Europe. To better understand its basic biology and possible ...