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Aquaculture International

, Volume 25, Issue 2, pp 635–654 | Cite as

Recommended feeding regime and light climate in live feed cultures of the calanoid copepod Acartia tonsa Dana

  • Per M. Jepsen
  • Niels S. Bjørbæk
  • Thomas A. Rayner
  • Minh T. T. Vu
  • Benni W. Hansen
Article

Abstract

Understanding and optimising the parameters that controls the success for copepod cultures are the foundation for large scaled copepod cultures. Many underlying copepod culture parameters are already quantified and comprehended, but there is a lack in knowledge of optimising feeding regimes for copepod cultures. In the present study, quantification and observations on how three different feeding regimes affected Acartia tonsa cultures, in terms of development time, specific growth rate, egg production, and egg hatching success were done. The three feeding regimes where dispensed as; once a day (spiked feeding), in four equal pulses (pulsed feeding), and evenly over 24 h (continuous feeding). The feeding regimes were investigated at low food levels (~200 µg C L−1) and at full-saturated food levels (~1800 µg C L−1). As photoperiod may have an effect on feeding uptake and productivity, the present experiments were segregated into two light regimes, one in darkness (0L:24D) and one in light (24L:0D). Acartia tonsa exposed to fully saturate feed levels developed twice as fast as at low saturated feed levels. A significantly higher total egg production from copepods was observed, equal to 53.5 % more eggs produced in dark cultures. Also, a 2.3 % significantly higher egg hatching success was obtained when culturing in dark. Since feeding regimes do not affect cultures, it is recommended that feeding of A. tonsa should be conducted as practical as possible for the individual copepod farmer, since optimal performance will be met as long as feed is supplied in excess. Furthermore, it is recommended that cultures are kept in dark for optimal egg production and sub sequent hatching success.

Keywords

Light regime Feeding regime Acartia tonsa Rhodomonas salina Copepod culture Aquaculture 

Notes

Acknowledgments

This work was funded by IMPAQ Grant (J. No. 10-093522) to Professor Benni W. Hansen and Grant (J. No. 11-116388) to Dr. Per M. Jepsen. Dr. Kim Larsen. Technicians Anne B. Faarborg and Rikke Guttesen are acknowledged for their assistance in the laboratory.

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Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  • Per M. Jepsen
    • 1
  • Niels S. Bjørbæk
    • 1
  • Thomas A. Rayner
    • 1
  • Minh T. T. Vu
    • 1
  • Benni W. Hansen
    • 1
  1. 1.Department of Environmental, Social and Spatial ChangeRoskilde UniversityRoskildeDenmark

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