| General |
| Name: |
John Witt ( coralhead317 ) Site: Marine Breeding Initiative (MBI) |
| Species: |
Premnas biaculeatus ( Class: B, Points: 40 ) 
|
| Link to Journal: |
http://www.mbisite.org/Forums/tm.aspx?m=71431
|
| Settlement Start Date: |
03/22/2012
11 Days After Hatching
|
| Settlement End Date: |
03/25/2012
|
| Tank Parameters |
| Temperature: |
78 ° F |
| PH: |
not tested |
| Specific Gravity: |
1.022 |
Size:
(Gallons) |
20 gallons |
| Dimensions: |
20 in dia X
20 in dia X
15 in high
|
| Lighting: |
ambient room lighting from shop lights
|
| Lighting Schedule: |
14 hours on, 10 hours off (reverse photoperiod on at 8pm, off at 10am)
|
| Filtration: |
after meta- central filtration with bioballs, algal turf scrubber, carbon, HSA 1000 skimmer
|
| Settlement Details |
| Date of Hatch |
03/11/2012
|
| Hatch Time: |
unknown, hatch occurred during day (lights out) while at work |
Fry Count:
( at Hatch ) |
approximately 150 |
Fry Count:
( at Settlement ) |
approximately 80 |
| Fry Size: |
~6 mm |
| Food: |
L strain rotifers, rotifers fed RotiGrow Plus twice daily when in culture vessel. Rotifers fed RotiGreen twice daily when in larval tub. |
| Feeding Schedule: |
Rotifers added to larval tub at 8pm the first day after hatching. Samples taken and based upon an estimate of the the concentration of rotifers in larval tub I will either add rotifers if appears to be low, or refrain from adding rotifers if the larvae cannot keep up with the rotifer production rate. The maroons were pretty voracious, so I added rotifers on 3/5/12, 3/7/12, 3/8/12, 3/9/12, and 3/11/12 to 3/15/12 and then 3/17/12 to 3/23/12. By 3/23/12 most of the larvae had passed through meta and I was feeding Otohime A by that time. |
Fry Description:
(Pre Settlement) |
Aggressive eaters, fast growers. |
Fry Description:
(Post Settlement) |
Dark in coloration, many were/are misbarred. By the time of transfer to grow-out, most of the maroons had 2-3 white stripes (or misbarred pieces of white stripes). These are the most belligerent fry I have ever raised - far more aggressive than either melanopus or frenatus. They are constantly fighting and subsequently I have several with pieces missing from their tails. |
| Other Details |
| Other Information: |
Most difficult aspect of this species is the aggression. I have lost many post-meta fish to hyper-aggressive behavior. Not sure how to address this. |