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Fatty acid recovery after starvation : insights into the fatty acid conversion capabilities of a benthic copepod (Copepoda, Harpacticoida)

(2017) MARINE BIOLOGY. 164(7).
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Abstract
Benthic copepods (Harpacticoida) are key members of the meiofauna community, and potentially important conveyers of energy from primary producers to higher trophic levels. However, little is known on their capability for trophic upgrading of food quality (essential fatty acids). Therefore, Platychelipus littoralis copepods were subjected to famine (3 days) and subsequent refeeding (6 days) on high (Thalassiosira weissflogii) and low (Dunaliella tertiolecta) quality food at 4, 15 and 24 C-omicron, and their resilience for recovery of structural and storage fatty acids was determined. Additionally, stable isotope probing of fatty acids gave insight into the copepods' ability to synthesize ARA (20:4 omega 6), EPA (20:5 omega 3) and DHA (22:6 omega 3) from low quality food under different temperatures. High intraspecific variability (among copepod replicates) in fatty acid composition and C-13 enrichment was observed when copepods were exposed to heat (24 C-omicron) and food quality stress, and operated therefore as an indicator of environmental stress. Synthesis of the essential fatty acids ARA, EPA and DHA from dietary precursors increased with temperature. However, despite the capability for synthesis, no fatty acid accumulation was observed, which suggested substantial fatty acid turnover, especially under heat stress. Moreover, synthesis rates were not sufficient to restore the omega 3 pools and ensure survival, at least for the duration of the experiment. Therefore, the question rises whether copepods of this local P. littoralis population will be able to cope with the reduced dietary supply of essential omega 3 fatty acids, as predicted under global warming, given that the physiological need for these essential compounds likely increases with temperature.
Keywords
MARINE FISH LARVAE, OXIDATIVE STRESS, ACARTIA-TONSA, TROPHIC RELATIONSHIPS, DOCOSAHEXAENOIC ACID, MICROBIAL BIOMASS, ISOTOPE ANALYSIS, GRAZING RATES, LIVE FOOD, TEMPERATURE

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Citation

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Chicago
Werbrouck, Eva, Samuel Bodé, Dirk Van Gansbeke, Ann Vanreusel, and Marleen De Troch. 2017. “Fatty Acid Recovery After Starvation : Insights into the Fatty Acid Conversion Capabilities of a Benthic Copepod (Copepoda, Harpacticoida).” Marine Biology 164 (7).
APA
Werbrouck, E., Bodé, S., Van Gansbeke, D., Vanreusel, A., & De Troch, M. (2017). Fatty acid recovery after starvation : insights into the fatty acid conversion capabilities of a benthic copepod (Copepoda, Harpacticoida). MARINE BIOLOGY, 164(7).
Vancouver
1.
Werbrouck E, Bodé S, Van Gansbeke D, Vanreusel A, De Troch M. Fatty acid recovery after starvation : insights into the fatty acid conversion capabilities of a benthic copepod (Copepoda, Harpacticoida). MARINE BIOLOGY. 2017;164(7).
MLA
Werbrouck, Eva, Samuel Bodé, Dirk Van Gansbeke, et al. “Fatty Acid Recovery After Starvation : Insights into the Fatty Acid Conversion Capabilities of a Benthic Copepod (Copepoda, Harpacticoida).” MARINE BIOLOGY 164.7 (2017): n. pag. Print.
@article{8534171,
  abstract     = {Benthic copepods (Harpacticoida) are key members of the meiofauna community, and potentially important conveyers of energy from primary producers to higher trophic levels. However, little is known on their capability for trophic upgrading of food quality (essential fatty acids). Therefore, Platychelipus littoralis copepods were subjected to famine (3 days) and subsequent refeeding (6 days) on high (Thalassiosira weissflogii) and low (Dunaliella tertiolecta) quality food at 4, 15 and 24 C-omicron, and their resilience for recovery of structural and storage fatty acids was determined. Additionally, stable isotope probing of fatty acids gave insight into the copepods' ability to synthesize ARA (20:4 omega 6), EPA (20:5 omega 3) and DHA (22:6 omega 3) from low quality food under different temperatures. High intraspecific variability (among copepod replicates) in fatty acid composition and C-13 enrichment was observed when copepods were exposed to heat (24 C-omicron) and food quality stress, and operated therefore as an indicator of environmental stress. Synthesis of the essential fatty acids ARA, EPA and DHA from dietary precursors increased with temperature. However, despite the capability for synthesis, no fatty acid accumulation was observed, which suggested substantial fatty acid turnover, especially under heat stress. Moreover, synthesis rates were not sufficient to restore the omega 3 pools and ensure survival, at least for the duration of the experiment. Therefore, the question rises whether copepods of this local P. littoralis population will be able to cope with the reduced dietary supply of essential omega 3 fatty acids, as predicted under global warming, given that the physiological need for these essential compounds likely increases with temperature.},
  articleno    = {151},
  author       = {Werbrouck, Eva and Bod{\'e}, Samuel and Van Gansbeke, Dirk and Vanreusel, Ann and De Troch, Marleen},
  issn         = {0025-3162},
  journal      = {MARINE BIOLOGY},
  keyword      = {MARINE FISH LARVAE,OXIDATIVE STRESS,ACARTIA-TONSA,TROPHIC RELATIONSHIPS,DOCOSAHEXAENOIC ACID,MICROBIAL BIOMASS,ISOTOPE ANALYSIS,GRAZING RATES,LIVE FOOD,TEMPERATURE},
  language     = {eng},
  number       = {7},
  pages        = {15},
  title        = {Fatty acid recovery after starvation : insights into the fatty acid conversion capabilities of a benthic copepod (Copepoda, Harpacticoida)},
  url          = {http://dx.doi.org/10.1007/s00227-017-3181-2},
  volume       = {164},
  year         = {2017},
}

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