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#copepod

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Warren Currie 🦠🦐<p>Weekend <a href="https://ecoevo.social/tags/Plankton" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Plankton</span></a> <a href="https://ecoevo.social/tags/Factoid" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Factoid</span></a> 🦠🦐<br>In case you ever wondered why SpongeBob's Plankton has a single eye, this is because he is a copepod (specifically a Cyclopoid <a href="https://ecoevo.social/tags/copepod" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>copepod</span></a> given his relatively short antennae). Most Copepoda have a single pigmented eyespot (often red), which is actually a tripartate (three cupped ocelli) nauplius eye. The actual function of this <a href="https://ecoevo.social/tags/eye" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>eye</span></a> isn't well understood, though likely related to movement and orientation.</p><p>Also, because his right antenna isn't bent, he is immature. 😉</p>
Lodewijk van Walraven<p>Finally built the <a href="https://mastodon.cloud/tags/LEGO" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LEGO</span></a> <a href="https://mastodon.cloud/tags/copepod" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>copepod</span></a> I designed in Studio! Especially like the look of the Ninjago swords and scythes for mouthparts and legs. <a href="https://mastodon.cloud/tags/plankton" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>plankton</span></a> <a href="https://mastodon.cloud/tags/MOC" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>MOC</span></a></p>
Warren Currie 🦠🦐<p>Weekend <a href="https://ecoevo.social/tags/Plankton" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Plankton</span></a> <a href="https://ecoevo.social/tags/Factoid" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Factoid</span></a> 🦠🦐</p><p><a href="https://ecoevo.social/tags/Copepod" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Copepod</span></a> <a href="https://ecoevo.social/tags/zooplankton" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>zooplankton</span></a> are the most numerous metazoans on the planet, and some have evolved into fantastical forms. Take Calocalanus pavo, the beautiful "peacock copepod", which has amazingly plumed antenna and caudal rami. It is small, ~1mm long, and uses the plumes to slow its sinking for feeding in the upper <a href="https://ecoevo.social/tags/ocean" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ocean</span></a>. It is famous for being very prominent in Ernst Haeckel's Kunstformen der Natur (1904) plate 54 <a href="https://ecoevo.social/tags/watercolour" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>watercolour</span></a> paintings of copepoda.<br><a href="https://ecoevo.social/tags/science" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>science</span></a> <a href="https://ecoevo.social/tags/art" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>art</span></a></p>
Warren Currie 🦠🦐<p>Weekend <a href="https://ecoevo.social/tags/Plankton" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Plankton</span></a> <a href="https://ecoevo.social/tags/Factoid" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Factoid</span></a> 🦐🦠<br>If you see a <a href="https://ecoevo.social/tags/copepod" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>copepod</span></a> <a href="https://ecoevo.social/tags/zooplankton" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>zooplankton</span></a> with a distinctly wonky bent antenna, it is likely a male. They use this antennule to grasp females during <a href="https://ecoevo.social/tags/mating" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>mating</span></a> to allow them to place a spermatophore (sperm packet) at the female's genital opening. Only the right antennule of adult male <a href="https://ecoevo.social/tags/calanoids" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>calanoids</span></a> is geniculate. Both antennules are modified on adult male <a href="https://ecoevo.social/tags/cyclopoids" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>cyclopoids</span></a> (and harpacticoids). Females lack modified antennae but have a genital pore or carry eggs. <a href="https://ecoevo.social/tags/Science" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Science</span></a> <a href="https://ecoevo.social/tags/oceanography" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>oceanography</span></a></p>
Warren Currie 🦠🦐<p>Weekend <a href="https://ecoevo.social/tags/Plankton" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Plankton</span></a> <a href="https://ecoevo.social/tags/Factoid" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Factoid</span></a> 🦐🦠<br>Today: <a href="https://ecoevo.social/tags/zooplankton" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>zooplankton</span></a> and <a href="https://ecoevo.social/tags/turbulence" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>turbulence</span></a>. While marine <a href="https://ecoevo.social/tags/copepod" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>copepod</span></a> effects are documented, little work has been done on turbulence and <a href="https://ecoevo.social/tags/cladocerans" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>cladocerans</span></a>, which dominate freshwater systems - and notoriously poor swimmers.</p><p>MSc student, Luc Goulet, focused on <a href="https://ecoevo.social/tags/vorticity" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>vorticity</span></a> (rotation), very relevant to lakes and rivers. Using rotating cylinders, he found speeds where it interferes with <a href="https://ecoevo.social/tags/Daphnia" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Daphnia</span></a> ability to orient and feed, so relevant to their ecology. <a href="https://ecoevo.social/tags/science" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>science</span></a></p><p><a href="https://aslopubs.onlinelibrary.wiley.com/doi/full/10.1002/lno.12590" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">aslopubs.onlinelibrary.wiley.c</span><span class="invisible">om/doi/full/10.1002/lno.12590</span></a></p>
Warren Currie 🦠🦐<p>Weekend <a href="https://ecoevo.social/tags/Plankton" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Plankton</span></a> <a href="https://ecoevo.social/tags/Factoid" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Factoid</span></a> 🦐🦠<br>This is the time of year in the northern hemisphere before the low productivity dark of winter sets in that some <a href="https://ecoevo.social/tags/copepod" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>copepod</span></a> <a href="https://ecoevo.social/tags/zooplankton" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>zooplankton</span></a> go into diapause. This resting state occurs in deep <a href="https://ecoevo.social/tags/lakes" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>lakes</span></a> and <a href="https://ecoevo.social/tags/oceans" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>oceans</span></a>, and is possible because of a fat transformation. Stored oil droplets turn to fatty wax esters under pressure which means they hang out at depth, no swimming required, and live off their <a href="https://ecoevo.social/tags/lipid" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>lipid</span></a> stores until spring. <a href="https://ecoevo.social/tags/Seasonality" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Seasonality</span></a><br><a href="https://phys.org/news/2011-12-copepods-weight-belts.amp" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">phys.org/news/2011-12-copepods</span><span class="invisible">-weight-belts.amp</span></a></p>
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