#nauplii

[neat-deadandlive-things]

Baby ghost.

[adelicateculturecell]

“That map will likely never be complete, but the work that goes into it helps up navigate through time and space and through invisible lives, long gone, to see how our world today is connected to the microcosms of the past.”

Journey to the Microcosmos- Trying to Make Sense of This Overwhelming World

Images Originally Captured by Jam’s Germs

Dolichospermum 1000x, Gloeotrichia 100x, Suctoria 400x, Bacteria 600x, Spirogyra, Paramecium bursaria, & rotifers 200x, Rotifer & nauplii 200x

[shrimple-blog]

TODAY’S FACTLET: Phototaxis!

Phototaxis is an animal's reaction towards light. There is Negative and Positive phototaxis; Positive is when an animal is attracted to light, while Negative is when an animal moves away from it.

EXAMPLES OF POSITIVE PHOTOTAXIS:

•Moths are infamous for following lights. This is because they use the light of the moon to determine which way is up, so they can fly upright.

•Brine shrimp (more commonly known as sea monkeys) will follow light as that’s where their food, algae, normally is. Though I don’t believe it’s very thoroughly studied officially, I’ve found it’s most prominent in 3-7 day old nauplii (*1) from my own colonies.

EXAMPLES OF NEGATIVE PHOTOTAXIS:

• millipedes, or most other burrowing animals avoid the light, as it usually means they are exposed and in danger. Down in the dirt, it’s dark and safe. Mostly. Dark areas also tend to be damp, which helps them avoid desiccation (*2)

•scorpions are also negatively phototactic. I assume this is because desert scorpions use it to seek shelter in their hot habitat, but funnily enough I couldn’t find a source stating such. I did find one saying why they glow under UV light may be to notify themselves once they have found effective shelter, as their photosensitive (*3) tails would be able to tell their nervous system when the signal is blocked, thus stopping the reflex action (*4)

JARGON:

• (*1) NAUPLII: the larva stage of most crustaceans. In this stage, they have few segments and have a singular, primitive eye. Basically a baby crustacean.

• (*2) DESICCATION: To dry out completely, or severe dehydration.

• (*3) PHOTOSENSITIVE: having a response to light.

• (*4) REFLEX ACTION: an automatic action something has in response to a stimulus (change in the environment) - happens subconsciously.

[lord-dusk]

Okay Homo sapiens, how can y'all categorize all non-raptorial/psittacoidean avians as barnacles? Is it because of the hard shell, simple personality, and hair-like feeding tentacles? Actual avians don't even breathe through gills. I mean, YEAH, all vertebrate embryos(including avians) have gills, but here's one eensie-weensie little fact-avian embryos grow lungs at the cost of their gill-pouches. Barnacle-mermaids, like their crustaceanoid-kin like crabs and shrimps, start off as nauplii-tiny, beating blobs with a singular eye and two arm-like appendages for swimming. Also, barnacle-mermaids CANNOT breathe air-they just can't. They might do okay on land when inside their shells, but most will perish if not returned to seawater. Their feeding-tentacles also function as respiratory organs.

[rhythmus-articulus]

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naupliiii celebratiing iin the liight... #nauplii #hatching #organisms