The nutritional importance of polyunsaturated fatty acids and their use as trophic markers for herbivorous zooplankton: Does it contradict?

2006 ◽  
Vol 167 (1-4) ◽  
pp. 501-513 ◽  
Author(s):  
Dörthe C. Müller-Navarra
Keyword(s):  
Fatty Acids ◽  
Polyunsaturated Fatty Acids ◽  
Herbivorous Zooplankton ◽  
Nutritional Importance ◽  
Trophic Markers

scholarly journals Nitrogen enrichment leads to changing fatty acid composition of phytoplankton and negatively affects zooplankton in a natural lake community

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Gabriele Trommer ◽  
Patrick Lorenz ◽  
Ameli Lentz ◽  
Patrick Fink ◽  
Herwig Stibor
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Polyunsaturated Fatty Acids ◽  
Acid Composition ◽  
Food Quality ◽  
Secondary Production ◽  
Nutrient Supply ◽  
Herbivorous Zooplankton ◽  
Pufa Composition

AbstractSecondary production in freshwater zooplankton is frequently limited by the food quality of phytoplankton. One important parameter of phytoplankton food quality are essential polyunsaturated fatty acids (PUFAs). Since the fatty acid composition of phytoplankton is variable and depends on the algae’s nutrient supply status, inorganic nutrient supply may affect the algal PUFA composition. Therefore, an indirect transfer of the effects of nutrient availability on zooplankton by changes in algal PUFA composition is conceivable. While the phosphorus (P) supply in lakes is largely decreasing, nitrogen (N) inputs continue to increase. This paper presents data from a mesocosm field experiment in which we exposed phytoplankton communities to increasing N enrichment. As a consequence, the PUFA composition of the phytoplankton community changed. With increasing nitrogen fertilisation, we observed lower quantities of essential PUFAs, together with a decrease in the abundances of the dominant herbivorous zooplankton Daphnia sp. Their biomass was significantly correlated with phytoplankton PUFA content (C18:3 ω3, C20:5 ω3, C18:2 ω6). Our data therefore indicate that changes in nitrogen supply, together with the resultant changes in phytoplankton food quality, can negatively affect the secondary production of herbivorous zooplankton by reducing the availability of essential polyunsaturated fatty acids.

A randomized, double-blind, placebo-controlled study of polyunsaturated fatty acids efficacy in adolescents with anorexia nervosa

2020 ◽  
Vol 36 (2) ◽  
pp. 95-106
Author(s):  
Agnieszka M. Piróg-Balcerzak ◽  
Anna K. Bażyńska ◽  
Katarzyna Biernacka ◽  
Joanna Brągoszewska ◽  
Lidia Popek ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Anorexia Nervosa ◽  
Polyunsaturated Fatty Acids ◽  
Small Sample Size ◽  
Small Sample ◽  
Female Adolescent ◽  
Eating Attitude ◽  
Controlled Study ◽  
Omega 3 ◽  
Eat 26

Objective. Omega–3 polyunsaturated fatty acids (PUFAs) were tested in adolescent depression and in several neurodevelopmental disorders with partial success. Anorexia nervosa (AN) is characterised by deficiencies in fatty food intake and frequent comorbidity, including depressive and cognitive symptoms. Thus supplementation with PUFAs may be beneficial in this group of patients. The aim of the study was to assess whether PUFAs as an add-on treatment is associated with better improvement of body mass index (BMI) and psychopathological symptoms than placebo in patients with AN. Method. 61 female adolescent inpatients with AN were randomly allocated to omega–3 PUFAs supplementation or placebo for 10 weeks. Patients also participated in the behavioural programme and eclectic psychotherapy (treatment as usual, TAU). At baseline and follow-up visits, patients’ BMI and psychopathology were assessed with Clinical Global Impression Scale (CGI), Patient Global Impression Scale (PGI), and Eating Attitude Test (EAT-26). Results. After 10 weeks, both groups showed improvement in all parameters. Improvement in CGI scores was observed greater in placebo vs. PUFA-s group (p = 0.015) while other differences were not statistically significant. Omega–3 PUFAs supplementation appears not to be effective as an add-on treatment in inpatient adolescent girls with anorexia nervosa. Conclusions. The results should be analysed with caution due to small sample size and heterogeneity in TAU. As the TAU turned out to be highly effective, additional therapeutic effect of PUFA might not be visible. Nevertheless, that does not explain the tendency for better improvement in the placebo group.

Polyunsaturated fatty acids and phytoestrogens modulate osteoclastogenesis and bone resorption in raw 264.7 macrophages

2013 ◽  
Author(s):  
Natalie Shepherd ◽  
Jager Cassandre De ◽  
Abe Kasonga ◽  
Sumari Marais ◽  
Yuko Tousen ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Bone Resorption ◽  
Polyunsaturated Fatty Acids ◽  
Raw 264.7 ◽  
Raw 264.7 Macrophages

Metabolic immunomodulation: polyunsaturated fatty acids for the prevention of acute respiratory pathology in children

2017 ◽  
Vol 81 (1) ◽  
pp. 64-73
Author(s):  
L.S. Ovcharenko ◽  
◽  
T.V. Slutskaya ◽  
A.A. Vertegel ◽  
T.G. Andrienko ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Polyunsaturated Fatty Acids ◽  
Respiratory Pathology

Polyunsaturated fatty acids are less effective to reduce methanogenesis in rumen inoculum from calves exposed to a similar treatment early in life

2017 ◽  
Vol 0 (0) ◽  
pp. 0
Author(s):  
A. Ruiz-González ◽  
S. Debruyne ◽  
J. Jeyanathan ◽  
L. Vandaele ◽  
S. De Campeneere ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Polyunsaturated Fatty Acids ◽  
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