California Red Rock Shrimp Development. All research reported here was conducted in the Aquatic Nursery in 2008. Here in the Aquatic Nursery we are studying development of baby red rock shrimp. The adult female in this picture is gravid (pregnant).
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All research reported here was conducted in the Aquatic Nursery in 2008
Here in the Aquatic Nursery we are studying development of baby red rock shrimp.
The adult female in this picture is gravid (pregnant).
Under her abdomen she is carrying about 3,000 eggs!
The sample is photographed under a microscope every few days to track development, which helps us predict when the larvae will hatch.
Here we can see some cells in a baby shrimp starting to form the body!
3 days post fertilization
13 days after fertilization, the eggs are fully developed and ready to hatch.
Look at the black eyes and golden insides!
Once the eggs are fully developed, they give off a chemical that the mother can smell.
This smell is the mother’s cue to agitate the eggs and force hatching. This is similar to the way we crack open a chicken egg.
Watch the next three slides to see the first larvae hatch!
Baby shrimp are born as plankton.
They remain planktonic for
2-3 months before they settle on the ocean floor.
Plankton = unable to swim against the currents
Red rock shrimp will undergo physical changes in their body, called metamorphosis.
This is similar to a caterpillar spinning a cocoon and then weeks later transforming into a butterfly.
Metamorphosis = changes in body structure
1 days post hatching 4 days post hatching
8 days post hatching 23 days post hatching
40 days post hatching 45 days post hatching
This baby is 61 days old and ready to settle!
Settlement = attachment of a larval animal to substrate or the sea floor