A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Fish muscle mercury concentration and bioaccumulation fluctuate year-round : Insights from cyprinid and percid fishes in a humic boreal lake (2023)
Piro, A. J., Taipale, S. J., Laiho, H. M., Eerola, E. S., & Kahilainen, K.K. (2023). Fish muscle mercury concentration and bioaccumulation fluctuate year-round : Insights from cyprinid and percid fishes in a humic boreal lake. Environmental Research, 231(2), Article 116187. https://doi.org/10.1016/j.envres.2023.116187
JYU-tekijät tai -toimittajat
Julkaisun tiedot
Julkaisun kaikki tekijät tai toimittajat: Piro, A. J.; Taipale, S. J.; Laiho, H. M.; Eerola, E. S.; Kahilainen, K. K.
Lehti tai sarja: Environmental Research
ISSN: 0013-9351
eISSN: 1096-0953
Julkaisuvuosi: 2023
Ilmestymispäivä: 22.05.2023
Volyymi: 231
Lehden numero: 2
Artikkelinumero: 116187
Kustantaja: Elsevier BV
Julkaisumaa: Yhdysvallat (USA)
Julkaisun kieli: englanti
DOI: https://doi.org/10.1016/j.envres.2023.116187
Julkaisun avoin saatavuus: Avoimesti saatavilla
Julkaisukanavan avoin saatavuus: Osittain avoin julkaisukanava
Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/91369
Tiivistelmä
Boreal lakes demonstrate pronounced seasonality, where the warm open-water season and subsequent cold and ice-covered season dominate natural cycles. While fish muscle total mercury concentration (mg/kg) [THg] is well documented in open-water summer months, there is limited knowledge on the ice-covered winter and spring mercury dynamics in fish from various foraging and thermal guilds. This year-round study tested how seasonality influences [THg] and its bioaccumulation in three percids, perch (Perca fluviatilis), pikeperch (Sander lucioperca), ruffe (Gymnocephalus cernua), and three cyprinids, roach (Rutilus rutilus), bleak (Alburnus alburnus), and bream (Abramis brama) in the deep boreal mesotrophic Lake Pääjärvi, southern Finland. Fish were sampled and [THg] was quantified in the dorsal muscle during four seasons in this humic boreal lake. Bioaccumulation regression slopes (mean ± STD, 0.039 ± 0.030, range 0.013–0.114) between [THg] and fish length were steepest during and after spawning and shallowest during autumn and winter for all species. Fish [THg] was significantly higher in the winter-spring than summer-autumn in all percids, however, not in cyprinids. The lowest [THg] was observed in summer and autumn, likely due to recovery from spring spawning, somatic growth and lipid accumulation. Fish [THg] was best described by multiple regression models (R2adj: 52–76%) which included total length and varying combinations of seasonally changing environmental (water temperature, total carbon, total nitrogen, and oxygen saturation) and biotic factors (gonadosomatic index, and sex) in all species. The seasonal variation in [THg] and bioaccumulation slopes across multiple species suggests a need for standardized sampling seasons in long-term monitoring to avoid any seasonality bias. From the fisheries and fish consumption perspective in seasonally ice-covered lakes, monitoring of both winter-spring and summer-autumn would improve knowledge of [THg] variation in fish muscle.
YSO-asiasanat: kalat; elohopea; pitoisuus; kausivaihtelut; järvet; humusjärvet; vuodenajat; talvi; boreaalinen vyöhyke
Vapaat asiasanat: growth dilution; spawning; starvation; season; mercury; winter
Liittyvät organisaatiot
OKM-raportointi: Kyllä
VIRTA-lähetysvuosi: 2023
JUFO-taso: 2
