Dietary bioaccumulation of UV-absorbing compounds, and post-ingestive fitness in larval planktotrophic crustaceans from coastal SW Atlantic

• Published in: Marine environmental research 2021-08, Vol.170, p.105433-105433, Article 105433
• Main Authors: Marcoval, M. Alejandra, Pan, Jerónimo, Diaz, A. Cristina, Fenucci, Jorge L.
• Format: Article
• Language: English
• Subjects: Absorption; Algae; Aquatic crustaceans; Aquatic microorganisms; Bacillariophyceae; Bioaccumulation; Bulbs; Crustacea; Crustaceans; Cyrtograpsus angulatus; Developmental stages; Diatoms; Diet; Environmental stress; Fluorescence; Larvae; Marine microorganisms; Marine organisms; Paracalanus parvus; Phytoplankton; Plankton; Shellfish; Ultraviolet radiation; UV-Induced stress; Zoeae; Zooplankton
• ISSN: 0141-1136; 1879-0291
• DOI: 10.1016/j.marenvres.2021.105433

Increased ultraviolet radiation (UVR) is a major environmental stressor for marine organisms. The response of planktotrophic larvae of holo- and meroplanktonic crustaceans fed dietary algae grown under different light regimes and contents of UV-absorbing compounds (UACs), was experimentally evaluated. Paracalanus parvus copepodites and Cyrtograpsus angulatus zoeae were fed diatoms grown under two radiation treatments: PAR (400–700 nm, produced by 40 W cool-white fluorescent bulbs) and PAR + UVR (280–700 nm; adding Q-Pannel UV-A-340 lamps to PAR fluorescent bulbs). An absorption peak at 337 nm (UVR range) was observed only for larvae fed UVR-irradiated diatoms. After 144 h of ad libitum feeding, larvae were exposed to UVR for 24 h. Mortality rates were ~80% in individuals fed PAR-reared microalgae, and ~10% for those fed UV-irradiated microalgae. Results point to the importance of UACs conferring some tolerance to planktotrophic larvae under increased environmental UVR stress. Yet, acquired tolerance is differential among larvae, with implications for zooplankton ecology. •Stationary-phase diatoms reared under UVR contained elevated UV-absorbing compounds (UACs).•A mix of 2-diatom species was fed to planktonic crab zoeae and copepodites.•Both crustacean larvae did bioaccumulate UACs in their tissue, through food.•Larvae acquired UACs from dietary algae, which were grown under UVR condition.•Thus, UVR may indirectly alter larval zooplankton physiological response and survival via food.