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In my research, Daphnia have proven to be negatively phototaxic. Most specimens prefer an environment without intense to mild light.

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16y ago

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What might spark a conversion from sexual to asexual reproduction in Daphnia?

An increase in food availability might spark a conversion from sexual to asexual reproduction in Daphnia.


How many germ layers do daphnia have?

Daphnia have three germ layers: ectoderm, mesoderm, and endoderm. These layers are formed during embryonic development and give rise to the different tissues and organs of the organism.


What are adaptations of daphnia?

Daphnia are cold-blooded animals, and they do not thermoregulate. This means that their body temperature is the same as the water they are floating in. The chemical reactions that occur in the cells of Daphnia are dependent on certain enzymes, or proteins, to help the reactions proceed. As you increase the temperature of the water, the metabolism of the Daphnia increases as well, because chemical reactions occur faster at higher temperatures. This means that the heart rate will speed up in order to provide oxygen to the cells as the metabolism increases. However at 40 degrees Celsius, the enzymes break down, and the chemical reactions can no longer occur, so metabolism stops and the Daphnia dies


What is daphnia niche?

Daphnia are filter feeders. They clear the water column of algae and particulates. In turn they are eaten by other organisms, such as fish. Thus, one could say the ecological role of Daphnia is to transfer energy from lower to higher trophic levels.


Is a daphnia an autotroph or heterotrophs?

All plants are producers. Plants don't consume other things. Other things like rabbits consume (eat) them.