The water fleas
were originally due to be sent in June last year, but ISSET said the explosion of three separate US rockets delayed the human space programme.
The water flea
Daphnia magna (Crustacea, Cladocera) as a test species for screening and evaluation of chemicals with endocrine disrupting effects on crustaceans.
Scientists studying bacterial infections in tiny water fleas
have discovered that increasing their supply of food can speed up the spread of infection.
Spiny water fleas
disrupt the natural food chains in the areas they invade by competing with native zooplankton (microscopic aquatic animals) for food, as well as eating native zooplankton.
The water in my pond has turned a little like pea soup in this hot spell and I have added some Daphnea (water fleas
) to the mix to help clear it.
For example, Cortland Line Company's Flea Flicker line is a big help in lakes where spiny water fleas
(Bythotrephes cederstroemi) are a problem.
They were extremely poor and to make ends meet Dr Cohen began catching water fleas
- a staple diet of fish - from the banks of the Thames, emergency tanks, anywhere where there was stagnant water.
Up to now, the tests have always been carried out on algae, water fleas
and fish in equal measure - some 1.6 million fish are used every year for lab experiments in Europe.
Dracunculiasis is contracted when people consume stagnant water, contaminated with microscopic water fleas
which carry the infective larvae of the Guinea worm.
Science Is Fiction: The Films of Jean Painleve, edited by Andy Masaki Bellows and Marina McDougall with Brigitte Berg (MIT Press), rescues from history's editing-room floor the delightful scientific documentaries of French filmmaker Jean Painleve (1902-89) Octopi, water fleas
, and vampire bats are just a few of the stars of Painleves 200-plus film studies.
Editorial Note: Dracunculiasis is a parasitic infection acquired by drinking water from ponds contaminated by copepods (water fleas
) that contain immature forms of the parasite.
Also some new discoveries about copepods (tiny crustaceans like water fleas
) have forced those who study such things to rethink their whole book of facts.
''It's a relatively cheap hobby, even cheaper than going barhopping.'' Carp feed on tubifex, water fleas
, mosquito larvae and other natural organisms that are usually present in the ponds.
These bladders (2) are really tricky traps for mosquito larvas, water fleas
, and other tiny creatures.
Freshwater and saltwater organisms including many reference species such as the fathead minnow (Pimephales Promelas) and water fleas
(Daphnia) are covered.