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•  sea urchin larval development

  Author Message till Total Posts : 9 Scores: 0 Reward points : 106 Joined: 10/11/2011 Location: Giessen, , DE Status: offline MBI: 0 Pnts MBI Site: Marine Breeding Initiative (MBI) sea urchin larval development Tuesday, October 11, 2011 9:35 AM (permalink) 0 thought i will post a small video clip we did for our research project in Panama http://www.youtube.com/watch?v=FbWbJci39k0&   #1 JimWelsh Total Posts : 1426 Scores: 14 Reward points : 1486 Joined: 1/22/2010 Location: Angwin, CA, US Status: offline MBI: 1845 Pnts MBI Site: Marine Breeding Initiative (MBI) Re:sea urchin larval development Tuesday, October 11, 2011 9:44 AM (permalink) 0 Fascinating!  What did you feed the larvae?   #2 till Total Posts : 9 Scores: 0 Reward points : 106 Joined: 10/11/2011 Location: Giessen, , DE Status: offline MBI: 0 Pnts MBI Site: Marine Breeding Initiative (MBI) Re:sea urchin larval development Tuesday, October 11, 2011 9:46 AM (permalink) 0 Isochrysis. Raising them was actually much more easy than i tought it would be. They settled after 2 weeks.     #3 EasterEggs Total Posts : 1946 Scores: 19 Reward points : 735 Joined: 9/22/2011 Location: Saskatoon, SK, CA Status: offline MBI: 590 Pnts MBI Site: Marine Breeding Initiative (MBI) Re:sea urchin larval development Tuesday, October 11, 2011 10:13 AM (permalink) 0 Fascinating is definitely the word!  Amazing video, thank you so much for sharing!  With us all being breeders, I think most of us would LOVE for you to give us some culture details.    I know images like that certainly make ME want to try!   #4 mPedersen Total Posts : 3450 Scores: 29 Reward points : 1376 Joined: 2/27/2009 Location: Duluth, MN, US Status: offline MBI: 4975 Pnts MBI Site: Lake Superior Marine Aquarium Club Re:sea urchin larval development Tuesday, October 11, 2011 10:15 AM (permalink) 0 What SPECIES of urchins were you working with?   edit - ahh...I see it's in the vid! Echinometra viridis Echinometra lucunter Lytechinus williamsi Lytechinus variegatus   #5 JimWelsh Total Posts : 1426 Scores: 14 Reward points : 1486 Joined: 1/22/2010 Location: Angwin, CA, US Status: offline MBI: 1845 Pnts MBI Site: Marine Breeding Initiative (MBI) Re:sea urchin larval development Tuesday, October 11, 2011 10:19 AM (permalink) 0 The titles on the video state Echinometra viridis, Echinometra lucunter, Lytechinus williamsi, and Lytechinus variegatus.   EDIT:  Matt edited while I was replying.   #6 CableGuy Total Posts : 591 Scores: 7 Reward points : 731 Joined: 8/26/2010 Location: Saint Clair Shores, MI, US Status: offline MBI: 635 Pnts MBI Site: MarineLife Aquarium Society of Michigan Re:sea urchin larval development Tuesday, October 11, 2011 10:47 AM (permalink) 0 Wow... that is amazing! Love to see stuff like this! -Adam   #7 zimajays Total Posts : 203 Scores: 4 Reward points : 351 Joined: 8/31/2010 Location: Lincoln, Lincolnshire, GB Status: offline MBI: 775 Pnts MBI Site: Marine Fish Breeders Club - UK Re:sea urchin larval development Tuesday, October 11, 2011 11:06 AM (permalink) 0 very cool! Proud member of the first dedicated breeders site in the UK Marine Fish Breeders Club - UK H.Zosterae - 60 DPS   #8 till Total Posts : 9 Scores: 0 Reward points : 106 Joined: 10/11/2011 Location: Giessen, , DE Status: offline MBI: 0 Pnts MBI Site: Marine Breeding Initiative (MBI) Re:sea urchin larval development Tuesday, October 11, 2011 1:45 PM (permalink) 0 thank you all for your kind words. There will be an article in the coral magazine where i describe the hole process in detail.     The biggest obstacle for hobbyists might be obtaining the gametes. We used KCL injections to induce spawning and they usually didnt survive that. Heat shock also works at least for Echinometra. When these urchins were very ripe they often spawned in the bucket on the transport back to the laboratory. I tried spawning them in the lab using warm water but i never had any success with Lytechinus.    Larval were fed daily with Isochrysis. About 75% of the water was changed every other day. To keep them in suspension we raised the larvae in rotating jars. Paddle systems work also. They dont tolerate aeration very well, but I m shure you can raise at least some using air pumps.     metamorphosis may start as soon as day 12.  Newly metamorphosed urchins measure about 0,5 mm       #9 wdt Total Posts : 156 Scores: 0 Reward points : 321 Joined: 10/20/2010 Location: Asheville, NC, US Status: offline MBI: 720 Pnts MBI Site: Marine Breeding Initiative (MBI) Re:sea urchin larval development Tuesday, October 11, 2011 5:13 PM (permalink) 0 Very interesting, Thanks for sharing!!   Are the jars on some type of conveyor? Are the jars completely sealed?   #10 mPedersen Total Posts : 3450 Scores: 29 Reward points : 1376 Joined: 2/27/2009 Location: Duluth, MN, US Status: offline MBI: 4975 Pnts MBI Site: Lake Superior Marine Aquarium Club Re:sea urchin larval development Tuesday, October 11, 2011 5:35 PM (permalink) 0 There's actually an urchin hatchery of sorts in Hawaii ( http://www.facebook.com/profile.php?id=629944825 and Martin Moe has been working with the Diademas for a while now.  SOME Urchins are potentially well within reach of hobbyists with determination!   #11 EasterEggs Total Posts : 1946 Scores: 19 Reward points : 735 Joined: 9/22/2011 Location: Saskatoon, SK, CA Status: offline MBI: 590 Pnts MBI Site: Marine Breeding Initiative (MBI) Re:sea urchin larval development Tuesday, October 11, 2011 6:43 PM (permalink) 0 Thanks for sharing more info "till"!    #12 Umm_fish? Total Posts : 2835 Scores: 10 Reward points : 953 Joined: 11/4/2009 Location: Boulder, CO, US Status: offline MBI: 775 Pnts MBI Site: Marine Aquarium Society of Colorado Re:sea urchin larval development Tuesday, October 11, 2011 7:25 PM (permalink) 0 Did the larvae need any settlement cues to induce metamorphosis? Or was it basically just a time and food thing? --Andy, the bucket man. "Not to know the mandolin is to argue oneself unknown...." --Clara Lanza, 1886   #13 till Total Posts : 9 Scores: 0 Reward points : 106 Joined: 10/11/2011 Location: Giessen, , DE Status: offline MBI: 0 Pnts MBI Site: Marine Breeding Initiative (MBI) Re:sea urchin larval development Saturday, October 15, 2011 1:36 AM (permalink) 0 Originally Posted by Umm_fish?   Did the larvae need any settlement cues to induce metamorphosis? Or was it basically just a time and food thing?   sorry i forgot telling about that. yes we used coraline and filamentous algae to induce metamorphosis.   #14 Fishtal Total Posts : 5467 Scores: 37 Reward points : 2908 Joined: 8/31/2006 Location: Waterford, MI, US Status: offline MBI: 585 Pnts MBI Site: MarineLife Aquarium Society of Michigan Re:sea urchin larval development Saturday, October 15, 2011 1:39 AM (permalink) 0 Wonderful! Thank you so much for sharing. http://www.fishtalpropagations.com/#!home/mainPage "Making captive breeding easier."   #15 till Total Posts : 9 Scores: 0 Reward points : 106 Joined: 10/11/2011 Location: Giessen, , DE Status: offline MBI: 0 Pnts MBI Site: Marine Breeding Initiative (MBI) Re:sea urchin larval development Saturday, October 15, 2011 1:39 AM (permalink) 0 Originally Posted by wdt Very interesting, Thanks for sharing!! Are the jars on some type of conveyor? Are the jars completely sealed?   the jars are on rotating PVC pipes to keep them moving. they are completely sealed but opened daily to feed or to change water.   #16 EasterEggs Total Posts : 1946 Scores: 19 Reward points : 735 Joined: 9/22/2011 Location: Saskatoon, SK, CA Status: offline MBI: 590 Pnts MBI Site: Marine Breeding Initiative (MBI) Re:sea urchin larval development Saturday, October 15, 2011 10:24 AM (permalink) 0 Originally Posted by till the jars are on rotating PVC pipes to keep them moving. they are completely sealed but opened daily to feed or to change water.   This is interesting for sure!   #17 KathyL Total Posts : 2639 Scores: 13 Reward points : 1504 Joined: 6/6/2010 Location: St. Louis, MO, US Status: offline MBI: 1605 Pnts MBI Site: Marine Aquarium Societies of North America Re:sea urchin larval development Sunday, October 16, 2011 7:42 AM (permalink) 0 can you describe the rotating instrument more, and with pictures?  We've never seen this thing.  Very curious.   #18 Online Bookmarks Sharing: Facebook Digg Google del.icio.us StumbleUpon

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