Aku's babies- Parent tank

sedna

Larger Pacific Striped Octopus
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Aku is an aculeatus whom I acquired on 11-12-08. She began brooding on 12-9-08, 2 days from the full moon. The eggs hatched out on 1-1-09, 2 days from the first quarter moon. The moon phases may not be important, but I cycle with the moon so who knows? The Once-ler began brooding on the full moon (coincidence?). During brooding the tank's temp has been between 78F and 77.2 F. The pH has been fluctuating between 7.8 to 8.2, with nitrates, nitrites and ammonia at 0.

The mother octo has been living in a 55 gal bow front tank. When she began brooding, I started to dose the the tank with "D.T.'s" phytoplanktons 2-3 times a week in order to increase the population of native 'pods in the tank. Given the shape of the tank and the fact that I use a canister filter (both minuses in the past) I was able to modify things to get a (mostly) circular horizontal flow. I used a piece of plexiglass that I had drilled holes in then glued on a piece of filter sock so that I can close off the back corner. The intake for the filter is behind the plexiglass panel so that the babies wont get sucked up into it. On the outflow end of the filter, I attached a pvc tube that had holes drilled into it and also attached a flow regulator on it. The result was supposed to be a nice, horizontal flow in a circular direction but even with a valve to regulate the flow it's a little stronger than I'd like. I can turn it off and on as I like, for now it's on. I've also put the bubble rope I used last time in the mix but this time I've placed it on top of the live rock, which is all piled up in the middle, so that they won't rest on it and get eaten by bristle worms.

As with last time, I am feeding a mix of newly hatced brine shrimp and Rotifeast, but I've also added cyclop- eeze. I got Arcti-pods, but they are bigger than the babies yet. Last time the babies were catching wild pods in the tank their size at 6-7 days, so I'm waiting a couple of days to add that to the soup.

I re-read the Iglesias et al studyhttp://www.tonmo.com/community/index.php?threads/9300/, and am still unsure how I want to deal with lighting. I have consulted this study both times and find the table of results very interesting! So far I've left the tank lights off of both tanks, and they absolutely congregate in the light. Based on the success rates of the studies, it looks like light may not be as important a factor to growth? I am feeding with the "spotlight" method I tried last time, though. Anyway to concentrate the food and signal feeding time can't hurt. More photos to come, PLEASE ask questions and give advice!!!
 

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sedna

Larger Pacific Striped Octopus
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I forgot to say that I have also clipped bunches of macroalgae onto the sides of the tanks, near the top H2O line. The babies especially tend to congregate in the bunches of algae in the greatest light sources. I have already started to target food into these as another way of concentrating their food source. This morning when it was still dark, the majority of the babies in the Kreisel were in a tangle of algae at the bottom of the tank. As the sun rose, so did the babies, and now in the full light of day there are no octos in that algae clump at the bottom- which at the moment is the darkest spot in that tank.
 

sedna

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Thanks, Monty! I've found this study helpful because they have a nice table comparing the parameters, specifications and results of many different trials. My husband is sure the reason the Spanish got the farthest is all about paella. Mmmm, paella...
 

sedna

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babies and light

As you can see in the photo posted previously, the tanks are near a large window that gets a lot of sunlight. In the larger photo, all the babies are in the corner of the tank closest to the window. They could swim around if they want but they actually hang onto the glass or swim near that spot all day. I decided to leave the lights off for this trial, but this evening I couldn't help myself and turned the tank lights on after sundown because it's so hard to see them. There are always a few babies swimming around on their own in the wider part of the tank, but when I turned the lights on tonight, the large group of them ascended toward the surface of the water, toward the light. It was so beautiful, like a miniature flock of birds that all took to the sky at once! I noticed that the brine shrimp hatchlings were all hanging on the glass in the same bright spot. I turned the lights off after a few minutes, and am going to leave them off for the most part. I will try to do a better job of getting (and posting) video footage this time, so I'll try to get the "flock of birds" thing tomorrow.
 

sedna

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Baby Photos

So while I was cheering on the Red Wings on Thursday (YES! It is o.k. to love BOTH the Red Wings and octopuses!) I was fooling around with the microscope and my Nikon Coolpix camera. Here are a couple of shots I was able to get by extending the camera lens into an eyepiece. It's a pretty simple stage microscope, the first shot is at 1X and the next at 3X. I found the little guy on the side of the siphon an hour after I'd finished, I thought it was dead. I was really surprised when it started moving around in the depression slide! I got a few seconds of video I'll get working on!
 

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DWhatley

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The day I put OhToo in the larger tank I saw something that looked a lot like that. I tried to catch it but it disappeared before I could get a net. Neal told me I was just fantisizing and I remembered putting a couple of shells in the tank from another tank so OhToo could make a door so I figured it was one of those little jellys that apprear every now and then, now I am not sure that it wasn't one of Serendipity's babies. I only saw it once for a few seconds and I only saw one but it did look a lot like the photo. I guess I will never know. I hope you can get the flock video to come out, it must look amazing.

I am a little confused about how you are housing them. Did you put some in the Kressel and leave some in the main tank?

Is Aku still alive and have you gotten her to take any food?
 

sedna

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Day 4, babies still

1-4-09
SG= 1.025
pH=7.8
N'ites=0
N'ates=0
Amm=0
temp= 77.5-78F

Anything else I should be checking for? There are still more babies in the parent tank than are easily counted but I'd estimate between 50 and 70. I am feeding the same soup as mentioned before, 3-4 times a day. I haven't seen these babies hunt as aggressively as the last bunch, but they are still only 4 days and it is SO hard to see in the tank with only ambient light. Now that the kreisel tank isn't in the way of the most crowded spot of the tank, I can get a closer look, but today is cloudy and they've dispersed around the tank a bit more.
 

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