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Barely visible to the naked eye, sea urchin larvae grow and transform into bottom-dwelling urchins.
Plankton Chronicles Project by Christian Sardet, CNRS / Noe Sardet and Sharif Mirshak, Parafilms
See Plankton Chronicles interactive site: http://www.planktonchronicles.org
[taxonomy:binomial=Paracentrotus lividus]
[taxonomy:kingdom=Animalia]
[taxonomy:phylum=Echinodermata]
[taxonomy:class=Echinoidea]
[taxonomy:order=Camarodonta]
[taxonomy:family=Parechinidae]
[taxonomy:genus=Paracentrotus]
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Apenas visible al ojo humano, las larvas de erizos (pluteus) viajan a la deriva con el plancton. Y esto, hasta que la graciosa larva se convierta en erizo comedor de algas.
[taxonomy:kingdom=Animalia]
[taxonomy:binomial=Paracentrotus lividus]
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This video shows the life cycle of the sea biscuit Clypeaster subdepressus and is part of my master's thesis project at the Biosciences Institute of University of São Paulo.
We collected adults from sand beds of São Sebastião Channel (São Sebastião, SP, Brazil) and induced gamete release (eggs and sperm). We did the fertilization in vitro and followed the embryonic development in the laboratory, under light microscopy. Embryos become swimming larvae, approximately 0.2 mm wide, which we fed with microalgae until metamorphosis. A diminute sea biscuit grows inside the larva. When the minuscule podia and spines are formed the larva sinks and undergoes metamorphosis. The juvenile sea biscuit resorbs the larval tissue and begins to explore its new habitat, between sand grains.
Scientific version of the video (aka article):
http://www.plosone.org/article/info:doi/10.1371/journal.pone.0009654
We did the footage in the Marine Biology Center of University of São Paulo (CEBIMar-USP), located in São Sebastião, SP, Brazil, northern shore of State of São Paulo.
http://www.usp.br/cbm
You can find more information about this project in the website.
http://mestrado.organelas.com
Download the soundtrack from the netlabel AEROTONE.
http://tinyurl.com/MyFirstTrumpet-Frerk
This video is under a Creative Commons by-nc-sa license.
http://creativecommons.org/licenses/by-nc-sa/2.5/br/
[taxonomy:binomial=Clypeaster subdepressus]
[taxonomy:kingdom=Animalia]
[taxonomy:phylum=Echinodermata]
[taxonomy:class=Echinoidea]
[taxonomy:order=Clypeasteroida]
[taxonomy:family=Clypeasteridae]
[taxonomy:common=Sea biscuit]
[taxonomy:common=Sand dollar]
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A peine visible à lâÅil nu, les larves pluteus dâoursins dérivent avec le plancton.
Et ce, jusqu'à ce que la gracieuse larve se métamorphose en un oursin brouteur dâalgues.
Projet Chroniques du plancton par Christian Sardet, CNRS / Noe Sardet et Sharif Mirshak, Parafilms.Consultez le site interactif : www.planktonchronicles.org
[taxonomy:kingdom=Animalia]
[taxonomy:genus=Paracentrotus]
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Description: English: Male Flower Sea Urchin (Toxopneustes roseus) releasing milt. November 1, 2011 Lalo Cove, Sea of Cortez. Date: 1 November 2011. Source: Own work. Author:
DM289169.
