1. The BIG Fish Deal 6 is March 2-4th, 2018 with a new location
    Dismiss Notice
  2. Rockville Hilton is the site of The BIG Fish Deal 6. New location! Check it out!
    Dismiss Notice
  3. The Aquarium Beautiful contest is located at the Rockville Hilton during BFD6
    Dismiss Notice
  4. The BIG Fish Deal 6.... March 2-4 2018
    Dismiss Notice
  5. The Market Place @ BFD6 - Tons of deals on fish and supplies. Sunday March 4th
    Dismiss Notice

DAPHNIA FACTS YOU MAY NOT KNOW

Discussion in 'Live Food' started by Frank Cowherd, Feb 7, 2018.

  1. Frank Cowherd

    Frank Cowherd Global Moderators
    Staff Member

    Real Name:
    Joined:
    Feb 13, 2007
    Messages:
    1,352
    Likes Received:
    83
    Trophy Points:
    48
    Location:
    Southern Maryland near Indianhead
    Last Activity:
    46 minutes ago
    DAPHNIA FACTS

    Did you know????

    Daphnia were originally called water fleas. They still are.

    Daphnia are found in swamp-like waters around the world.

    Daphnia are crustaceans, which means they have an exoskeleton like shrimp or crabs.

    Daphnia have more than 31,000 genes. People have fewer genes with around 21,000 genes.

    Under favorable conditions daphnia are all females and reproduce by asexual reproduction, producing young about every three days.

    Under non-ideal conditions daphnia reproduce sexually. At the first sign of favorable conditions going south, the next batch of baby daphnia produced are both male and female. Sexual reproduction produces a black egg case, containing a bunch of eggs, which takes about 8 days to hatch under the right conditions. If conditions are not right, the egg cases become dormant. Dormant eggs cases can survive heat and freezing and drying, which is how daphnia survive winters or droughts.

    Centuries old daphnia egg cases are often still viable and hatch under the right conditions. For example, egg cases from as long ago as the 12th century (1300 to 1650) have been found to be good. Daphnia hatched from these old egg cases have been used in modern research studies for comparison with daphnia from recent times.

    Daphnia are a key specie between the bacteria, algae, and protozoa they eat and the animals that eat daphnia.

    Daphnia are used as a way to monitor pollution in water. Daphnia are sensitive to any materials that get into their water through the sewer system or from farm runoff or put into their water on purpose. By placing materials into their water at various but known concentrations, the toxicity of the material can be determined. This method has been used by the government of the USA to specify the legal limits of materials in waters of the country. Countries around the world use similar methods.

    Reference: Chemical and Engineering News November 20, 2017
     
  2. Andrewtfw

    Andrewtfw Global Moderators
    Staff Member

    Real Name:
    Andrew
    Joined:
    Oct 12, 2008
    Messages:
    3,172
    Likes Received:
    33
    Trophy Points:
    48
    Gender:
    Male
    Location:
    Germantown, Maryland
    Last Activity:
    Yesterday at 7:25 PM
    Interesting! Thanks for sharing.
     
    CSnyder00 likes this.
  3. CichlidDan

    CichlidDan Members

    Real Name:
    Dan
    Joined:
    Sep 21, 2015
    Messages:
    510
    Likes Received:
    35
    Trophy Points:
    28
    Location:
    MD
    Last Activity:
    24 minutes ago
    Thanks for sharing I learned a lot from those facts!
     
  4. FishEggs

    FishEggs CCA Members

    Real Name:
    Matt
    Joined:
    Mar 5, 2015
    Messages:
    1,325
    Likes Received:
    265
    Trophy Points:
    83
    Gender:
    Male
    Location:
    Upper Marlboro, MD
    Last Activity:
    Yesterday at 11:31 PM
    No. I did not know. Now I do. For a little while. Until I forget.




    What were we talking about?
    Oh yeah I need to buy some daphnia.
     
  5. Becca

    Becca CCA Members

    Real Name:
    Rebecca G
    Joined:
    Feb 11, 2013
    Messages:
    4,581
    Likes Received:
    260
    Trophy Points:
    83
    Location:
    Damascus, MD
    Last Activity:
    Yesterday at 8:48 PM
    Daphnia can survive eons, but they can't survive me... siiiiiiiiiiiiiiiigh.
     
  6. IndianaSam

    IndianaSam Members

    Real Name:
    Sam
    Joined:
    Nov 27, 2015
    Messages:
    22
    Likes Received:
    2
    Trophy Points:
    3
    Location:
    Rockville, MD
    Last Activity:
    27 minutes ago
    That might be strictly true on a gene level, but due to alternative splicing I'd wager that humans have more gene-products than Daphnia. :):):)
     

Share This Page