Female waterflea

Female waterflea

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Credit: CREDIT : JOHN WALSH/SCIENCE PHOTO LIBRARY

Caption: Light micrograph of a female fresh waterflea Daphnia sp, showing a single egg developing in the dorsal surface of the carapace. The first pair of antennae are small, obscured by the large second pair, which are branched & bear several long swimming hairs. They serve as "rowing organs" propelling the creature through the water in jerky movements. During the spring & through the summer only females are found in the water. They reproduce parthenogenetically. Later small males appear & normal reproduction follows. The resulting eggs overwinter in the female & are laid in early spring. Waterfleas feed on algae & are themselves food for others.

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Keywords: animal, crustacean, daphnia sp., invertebrate, invertebrates, light micrograph, lm, nature, parthenogenesis, see waterflea, water flea, waterflea, wildlife, zoology

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