Browsing NTNU Open by Author "Issa, Semona"
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Combined effects of environmental variation and pollution on zooplankton life history and population dynamics
Issa, Semona (Doctoral theses at NTNU;2021:49, Doctoral thesis, 2021)Toxicity studies on aquatic organisms are commonly conducted under highly standardized conditions that exclude interactions with environmental factors. However, aquatic organisms such as Daphnia regularly experience ... -
Interactive Effects of Inorganic Mercury and Temperature on Production of Resting Eggs and Population Dynamics in Daphnia magna
Simonsen, Ane (Master thesis, 2018)Freshwater ecosystems are particularly vulnerable to the effects of climate change. In addition to the predicted increase in global surface temperatures, expected change in patterns of precipitation and wind can significantly ... -
Maternal dopamine exposure provides offspring starvation resistance in Daphnia
Issa, Semona; Chaabani, Safa; Asimakopoulos, Alexandros; Jaspers, Veerle; Einum, Sigurd (Peer reviewed; Journal article, 2022)The neurotransmitter dopamine has been shown to play an important role in modulating behavioral, morphological, and life history responses to food abundance. However, costs of expressing high dopamine levels remain poorly ... -
Population dynamics and resting egg production in Daphnia: Interactive effects of mercury, population density and temperature
Issa, Semona; Simonsen, Ane; Jaspers, Veerle; Einum, Sigurd (Peer reviewed; Journal article, 2021)Toxicity studies on freshwater organisms are commonly conducted by quantifying effects on asexual (clonal) reproductive rates in Daphnia, whereas studies of effects on sexual reproductive rates remain relatively rare. ...