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General
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| Name: |
Matt Pedersen ( mPedersen ) Site: MarineLife Aquarium Society of Michigan |
| Status: |
Approved |
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Species: |
Ostorhinchus margaritophorus
( Class:
C
, Points Awarded:
45
) 
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| Journal Thread: |
http://www.masm.org/mForums/tm.aspx?m=34737
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| Spawn Date: |
10/23/2005 |
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Time of Spawn: |
Evenings, usually 1-2 hours before lights out.
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Tank Parameters
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Temperature: |
around 80F
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PH: |
typically around 8.0
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Salinity: |
1.025
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Size:
( Gallons) |
24 gallon
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Dimensions: |
X
X
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Lighting:
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150 watt HQI + moonlighting, and for a while, supplemental actinics
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Lighting Shedule:
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12 hours on timer
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Filtration:
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Brood Stock Data
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Size of Female: |
2"
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Size of Male: |
2"
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Age of Female: |
unknown (Wild caught fish)
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Age of Male: |
unknown (Wild caught fish)
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Time Together:
(how long have you had the pair before this event)
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unknown - this was actually proven breeding group when I got them.
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Feeding
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Food: |
Main diet was enriched frozen brine and mysis, but they ate other things too
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Feeding Schedule:
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Multiple feedings per day
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Spawn Details
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Pre-Spawn Behavior: |
Female initiates courtship. Often, one of the first signs that the female is in the mood is that both males in the tank will distend their lower jaws, as if making rooms for impending spawn. Once the female has chosen her mate, she nudges the male she has selected, performs circling swimming displays. The male may yawn repeatedly as if dislocating or enlarging his buccal cavity. Courtship reaches a peak with the pair swimming parallel at each other’s sides. Spawning ensues shortly thereafter.
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Spawning Behavior:
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The actual spawning happens VERY quick – usually within the span of 30 seconds or less (i.e. turn your back on the fish and look back 30 seconds later only to find the male is now holding). The ONLY spawning event I have witnessed was a “freak” occurrence, lasting well over 30 minutes, with the female apparently having difficulty in passing the egg mass. In this “botched spawn”, the male ultimately took the egg mass in 3 large bites over the course of 15-20 minutes and consumed them immediately.
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Post Spawn Behavior:
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Male mouthbroods
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Egg Details
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Size: |
eggs are tiny, probably less than 1 mm
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Color: |
clear with orange oil droplet
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Quantity: |
hundreds
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Description:
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see above
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Location:
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male mouthbroods
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Other Details:
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never had a successful hatch, most eggs eaten/disappeared after 1-2 days. Some spawns held longer, with longest being 11 days (and possibly a good solid hatch). Note that they group (2m/1f) would spawn every 7-9 days.
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