The Pleasure of Finding Things Out

Daphnia, popularly known as water fleas, are small crustaceans that live in fresh water such as ponds, lakes, and streams. They serve as an important source of food for fish and other aquatic organisms. Daphnia are excellent organisms to use in bioassays because they are sensitive to changes in water chemistry and are simple and inexpensive to raise in an aquarium. They mature in just a few days, so it does not take long to grow a culture of test organisms.
Because Daphnia are transparent, it is possible to conduct bioassays using endpoints other than death. For example, through a microscope you can measure their heart rate or observe whether they have been eating. (Both of these signs are used to measure stress). If you are worried about killing Daphnia in your experiments, you could choose to measure one of these other endpoints instead. It is worth keeping in mind, though, that even under the best conditions these organisms live only a month or two, and in nature most of them get eaten within their first few days or weeks of life.

Daphnia, popularly known as water fleas, are small crustaceans that live in fresh water such as ponds, lakes, and streams. They serve as an important source of food for fish and other aquatic organisms. Daphnia are excellent organisms to use in bioassays because they are sensitive to changes in water chemistry and are simple and inexpensive to raise in an aquarium. They mature in just a few days, so it does not take long to grow a culture of test organisms.

Because Daphnia are transparent, it is possible to conduct bioassays using endpoints other than death. For example, through a microscope you can measure their heart rate or observe whether they have been eating. (Both of these signs are used to measure stress). If you are worried about killing Daphnia in your experiments, you could choose to measure one of these other endpoints instead. It is worth keeping in mind, though, that even under the best conditions these organisms live only a month or two, and in nature most of them get eaten within their first few days or weeks of life.

Notes
  1. carlos-penafiel reblogged this from molecularlifesciences
  2. brutesplicer reblogged this from baphometkin
  3. thejohnly reblogged this from jewel-rider
  4. jewel-rider reblogged this from baphometkin
  5. crowsephone reblogged this from baphometkin
  6. btlbkmn reblogged this from molecularlifesciences
  7. dermoosealini reblogged this from molecularlifesciences
  8. vetsidlava reblogged this from molecularlifesciences
  9. caromander reblogged this from molecularlifesciences
  10. kristinabaker22 reblogged this from molecularlifesciences
  11. callfortheredpriest reblogged this from molecularlifesciences
  12. mushb00m reblogged this from queenofthewest
  13. ephemeralillusions reblogged this from molecularlifesciences
  14. queenofthewest reblogged this from molecularlifesciences
  15. activator-inhibitor reblogged this from molecularlifesciences
  16. smialeeshialee reblogged this from floresalbert
  17. shlucy reblogged this from molecularlifesciences
  18. votredilettante reblogged this from molecularlifesciences
  19. floresalbert reblogged this from molecularlifesciences and added:
    Beautiful man.
  20. runningamongthestars reblogged this from molecularlifesciences
  21. suunie reblogged this from molecularlifesciences
  22. molecularlifesciences reblogged this from thescienceofreality
  23. blackfemalescientist reblogged this from cleophatrajones
  24. cleophatrajones reblogged this from heavenhighhhhh
  25. sarcasmicsarah reblogged this from scientificthought
  26. chawynsdaily reblogged this from thescienceofreality and added:
    Jadi ingat praktikum Fisiologi Hewan…