Effect of primary dietary sources and environmental variables on the condition of freshwater pearl mussel (Margaritifera margaritifera) populations
Tekijät
Päivämäärä
2021Pääsyrajoitukset
Tekijä ei ole antanut lupaa avoimeen julkaisuun, joten aineisto on luettavissa vain Jyväskylän yliopiston kirjaston arkistotyösemalta. Ks. https://kirjasto.jyu.fi/kokoelmat/arkistotyoasema..
Tekijänoikeudet
Julkaisu on tekijänoikeussäännösten alainen. Teosta voi lukea ja tulostaa henkilökohtaista käyttöä varten. Käyttö kaupallisiin tarkoituksiin on kielletty.
Earlier studies have suggested effect of land use on freshwater pearl mussel (FPM) via the detrimental impact of siltation on juvenile mussels, but little is known about its effects through the changes in food quality. Moreover, the relative role of autochthonous and allochthonous food source of FPM is largely unstudied. Therefore, the aim of this study was to investigate relationship between food source and performance of adult FPM, with the hypothesis that condition of mussels would correlate positively with the availability of autochthonous food. The mean shell opening resistance (SOR) and FPM density were used as indicators of the condition of the populations in 14 northern Finnish rivers. The diet of FPM was studied by analyzing stable isotope ratios (δ13C, δ15N, and δ2H) of the mussel foot tissue and the potential food sources. The contribution of autochthonous and allochthonous sources in the diet of FPM and its connection to the condition of the populations were examined with Bayesian mixing models. There was markable variation in the autochthonous source signal between the rivers, which may possibly be explained with the higher terrestrial organic matter contribution in the lake fine particulate organic matter in southern rivers. Mixing model medians suggested overall dominance of autochthonous sources in diet of FPM. Mixing model with mean SOR as a continuous effect explained best the variation in FPM diet, so that there was surprisingly a tendency of allochthonous contribution to increase with SOR, suggesting a possible positive association between condition of FPM and the proportion of allochthonous sources in the diet. Further studies are still needed to understand the relationship between food sources and condition of FPM, and the possible effect of land use on FPM via changes on food quality, but the present study suggests that although autochthonous sources largely dominate, the allochthonous food sources in diet of FPM can be of high importance for the performance of the individuals.
...
Asiasanat
Metadata
Näytä kaikki kuvailutiedotKokoelmat
- Pro gradu -tutkielmat [28117]
Samankaltainen aineisto
Näytetään aineistoja, joilla on samankaltainen nimeke tai asiasanat.
-
The role of salmonid fishes in conservation of the endangered freshwater pearl mussel (Margaritifera margaritifera)
Salonen, Jouni (University of Jyväskylä, 2016)The abundance of freshwater pearl mussels (Margaritifera margaritifera) has declined widely during the past century, and new conservation initiatives are needed. This thesis focused on the relationship between M. ... -
Effect of glochidia infection on growth of fish : freshwater pearl mussel Margaritifera margaritifera and brown trout Salmo trutta
Chowdhury, M. Motiur R.; Marjomäki, Timo J.; Taskinen, Jouni (Springer, 2021)Effect of freshwater mussels’ (Unionoida) glochidia on the growth of fish host has remained poorly studied. We compared the specific growth rate of the juvenile, PIT-marked brown trout (Salmo trutta) between uninfected ... -
Ethanol preservation effects on stable carbon, nitrogen and hydrogen isotopes in the freshwater pearl mussel
Hajisafarali, Mahsa; Taskinen, Jouni; Eloranta, Antti P.; Kiljunen, Mikko (Springer, 2023)Chemical preservatives can alter stable isotope ratios in animal tissues. The effects of preservation on δ13C and δ15N values have been investigated in a variety of species, but not on δ2H values or on the freshwater pearl ... -
Effects of the endangered freshwater pearl mussel Margaritifera margaritifera on river ecosystem and water quality
Begum, Khaleda (2018)Makeanveden helmen simpukka Margaritifera margaritifera on uhanalainen laji. Makean veden simpukat (Unionoida) voivat tarjota arvokkaita ekosysteemipalveluja ja parantaa veden laatua suodatustoimintansa ansiosta. Mitään ... -
Effect of freshwater pearl mussel (Margaritifera margaritifera) infection on virulence of flavobacterium columnare in brown trout (Salmo trutta)
Roy, Amitav (2019)Flavobacterium columnare on bakteeri, joka aiheuttaa kaloissa ns. lämpimän veden tautia (kolumnaris-tauti), mikä puolestaan aiheuttaa kuolleisuutta kalaisännissään. Erityisesti Pohjois-Euroopan alueella kesäaikana veden ...
Ellei toisin mainittu, julkisesti saatavilla olevia JYX-metatietoja (poislukien tiivistelmät) saa vapaasti uudelleenkäyttää CC0-lisenssillä.