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Breeding Journal, Species: Thor amboinensis
Saturday, February 26, 2011 9:54 PM
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Breeding Journal DataSheet This first post should be updated regularly to include new information as events take place or changes are made to your system General Species: Thor amboinensis Social Structure: protandric hermaphrodite Size of Individuals: ~ 2 cm Age of Individuals: unknown Date added to Tank: 11/11/2010 Broodstock Tank Details Size of Tank: 3 gallon picotope Substrate Details: 5 pounds of sand Filtration Details: AC 70, chemi-pure and chaeto Water Changes: 15-20% daily Water Temperature: 80-81 Lighting: 36 watt Dual satellite pc fixture Lighting Cycle: 12 hours Other Tank Inhabitants: Several corals, neon goby, sponges. Broodstock Feeding Details Food Types: Hikari L Pellets, Min F, mysis Feeding Schedule: Several times a day Spawning Details Date of First Spawn: 02/09/2011 Spawn Time of Day: 10 am Dates of Consecutive Spawns: Courtship Details: Male mates and guards female immediately after female spawns the next day. Egg Size: 1 mm Egg Color: Yellow Egg Count: >200 Hatch Details Hatch Date: 02/22/2011 Hatch Time of Day: 10 pm # Days after Spawn: 12 days Larvae Description: Tiny, thin and slender, about 2 mm in size. Are attracted to light. Larval Tank Details Temperature: 80-81 Size of Larval Tank: ~2.5 gallon cylinder Substrate Details: None Other Tank Decor: Handful of chaeto Filtration Details: None Lighting: 9 watt picotope fixture Lighting Cycle: 12 hours Water Changes: 5% every day Larval Feeding Details Food Types: Newly hatched artemia Feeding Schedule: 2 times a day and as needed Metamorphosis/Settlement Date of Settlement Start: 03/18/2011 Days after Hatch: 26 Days Date of Settlement End: Description of Fry: Exactly like the parents, just in a much smaller scale. Grow-Out Tank Details Temperature: 78-79 Size of Grow-Out Tank: 2.5 gallon Substrate Details: Bare bottom Other Tank Decor: Live rock, GSP and Xenia. Filtration Details: AC70 with Chemipute elite and Chaeto Lighting: 18 watt pc satellite Lighting Cycle: 8am-9pm Water Changes: Every 3-4 weeks Size at Transfer: about 8mm Age at Transfer: 60 days Grow-Out Feeding Details Food Types: Pellets and mysis Feeding Schedule: Every morning Additional Information (No Pictures or Videos in the Section Please) Miscellaneous Information: You will be required to provide photographic evidence in this thread of each event submitted for the MBI Program. If your thread does not contain these photos the MBI Committee will not be able to approve your reports.
<message edited by pj86 on Friday, August 12, 2011 11:37 AM>
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Re:Breeding Journal, Species: [Thor amboinensis]
Saturday, February 26, 2011 10:25 PM
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Re:Breeding Journal, Species: [Thor amboinensis]
Sunday, February 27, 2011 6:29 AM
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Hi pj, Are you doing water changes, or just relying on the aqualifters for top-off? I can't tell precisely what the various elements of your system do...
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Re:Breeding Journal, Species: [Thor amboinensis]
Sunday, February 27, 2011 11:36 AM
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Hey jayelblock glad to see you in MBI. Ignore all the mess behind the setup, most of those wires and aqualifters are for my picotope. The setup is a real simple one. It is a cylinder that contains a heater, an aqualifter that acts as an air pump, and a thermometer. Also, I have a handful of chaeto. So far I haven't done a single water change, because none of the shrimp and very few of the artemia have died (quite a few get eaten by the shrimp). Instead I started my setup by filling the cylinder halfway with newly made saltwater. For the past week I have been adding about a quart of water from my main tank to the cylinder. And that is pretty much the basis of my setup. Today will be day 7 for the shrimp, they already look considerably different and larger. I will try to post photos soon.
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Re:Breeding Journal, Species: [Thor amboinensis]
Tuesday, March 1, 2011 5:32 PM
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So tonight marks day 10, and here is a pic
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Re:Breeding Journal, Species: Thor amboinensis
Tuesday, March 1, 2011 8:17 PM
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Re:Breeding Journal, Species: Thor amboinensis
Saturday, March 5, 2011 5:17 AM
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Everything still going well? I'm looking forward to your two-week update. You're half way to having them settled.
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Re:Breeding Journal, Species: Thor amboinensis
Saturday, March 5, 2011 5:52 PM
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jayelblock, yep everything is going well. So far I haven't seen any of the larva die after checking water changes and at the bottom of the vase. They do look quite different now and clearly are developing antennae. Also, they are no longer attracted to light as much, so they are more evenly spread out in the water. One more week and hopefully they will settle. I will post a video tomorrow.
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Re:Breeding Journal, Species: Thor amboinensis
Monday, March 7, 2011 2:22 PM
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14 DAYS OLD, you can see the stalks for the eyes are beginning to be visible.
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Re:Breeding Journal, Species: Thor amboinensis
Monday, March 7, 2011 2:25 PM
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Very cool. This is right where I lost mine, so I can't wait to see more pics of their development. Sounds like you'll make it to settlement easily.
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Re:Breeding Journal, Species: Thor amboinensis
Saturday, March 12, 2011 6:20 AM
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Hi pj, what's the latest?
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Re:Breeding Journal, Species: Thor amboinensis
Saturday, March 12, 2011 7:34 PM
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jayelblock, I lost quite a few these past few days they just started disappearing. I still have a good 30-40. I took out the chaeto and noticed there were a few large isopods, so I cleaned the chaeto and made sure there weren't any possible predators. The larva are pretty much almost there, only thing missing seems to be the mature legs that will allow them to settle. Settlement should occur in 2-3 days according to other breeding threads. I will post photos tomorrow.
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Re:Breeding Journal, Species: Thor amboinensis
Sunday, March 13, 2011 6:51 AM
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Although disappointing, I think that's pretty typical. I believe 15% survival rate is considered a success. I'm not sure why they tend to crash after two weeks, but they often do. Anyway, I still think congratulations are in order. Can't wait to see your settled shrimp.
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Re:Breeding Journal, Species: Thor amboinensis
Tuesday, March 15, 2011 10:48 PM
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So, it is 23 days after hatching. I must say that I haven't been 100% consistent with certain aspects of the maintenance of the tank. I have about 20 larva still remaining and are larger and are beginning to show the red coloration of the parents. Some pointers. Things that I think were beneficial - Start with fresh saltwater mix, and try to move the pregnant female to the rearing tank - For the first few days, add main tank water, rather than removing water from the rearing tank. - Have some chaeto for stability - Feed only artemia that has been born less than 6 hours Things that I think were harmful - Do not decrease the number of water changes, the more frequent the better - Always use main tank water for the water changes, it seems to induce morphing - Make sure the chaeto has no predators So here is a updated video 22 days old
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Re:Breeding Journal, Species: Thor amboinensis
Tuesday, March 15, 2011 10:54 PM
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Excellent!!! I especially like your rundown on the good and the bad points. Using tank water definately makes sense in the regards of settlement cue's though it may also be a source of predator contamination. I'll definately roll this one around in my noodle for thoughts!
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Re:Breeding Journal, Species: Thor amboinensis
Wednesday, March 16, 2011 8:01 AM
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I know it's not not exactly the same situation but I only use water from my display for doing my WC's for the Banggers. In fast what I do is just a simple swaping of water. Siphon out 50% of the water from teh rearing tank to the sump of the display and then siphon water from the display back into the rearing tank to refill it. So far I've had no issues.
Chad Penney - MBI Council Agis quod Adis
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Re:Breeding Journal, Species: Thor amboinensis
Friday, March 18, 2011 9:36 PM
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cmpenney, I do agree with the water changes from the main tank. But I had a very high initial survival rate with freshly made water as the initial water used for the rearing. All the other water additions are made with the the main tanks water. So, I have about 15-20 left, 3 have made it to settlement but are having difficulty completely morphing and seem to be struggling. The 3 don't seem like they are going to make it. I wonder how the other 15 or so will do. I'm starting to get frustrated that they are so close yet they are having trouble taking the last step.
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Re:Breeding Journal, Species: Thor amboinensis
Friday, March 18, 2011 9:45 PM
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With the fish that I have raised I've started with water from the broodstock system in the hatch tanks. This reduces any trauma to the eggs and newly hatched larvae. For water changes I've used freshly made saltwater during water changes. It's my understanding that using new water lowers the risk of adding potential pathogens that might be found in water from an existing system and cause problems with water quality and larval development. Feel free to correct me if I'm mistaken.
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Re:Breeding Journal, Species: Thor amboinensis
Friday, March 18, 2011 10:08 PM
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I don't have much experience with rearing yet. I can see both ways working though. I did it reverse because my broodstock water has an extremely high nutrient content. I did notice though with this batch of sexy shrimps that the addition of main tank water induced immediate morphing <5 minutes after addition, and did not morph when fresh saltwater was used. Next time I rear a new batch I will separate some larva and use freshwater as the control and see the differences between each method.
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Re:Breeding Journal, Species: Thor amboinensis
Friday, March 18, 2011 10:21 PM
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That sounds like a really good experiment! FWIW, I was only speaking from my experience with fish... I'm not sure how, or if, things might be different with inverts.
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