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: Atelomycterus marmoratus Social Structure: pair
Size of Individuals: M: 53cm, F: 60cm (both approx)
Age of Individuals: Unknown (wild caught)
Date added to Tank: M: 10/20/2010, F: 2/02/2012
Broodstock Tank Details Size of Tank: 180 US Gallons, 180 x 60 x 60cm
Substrate Details: Agramax sugar-sized oolite #00930
Filtration Details: live rock in sump, protein skimmer
Water Changes: 25 US gallons per week
Water Temperature: 24.4 C
Lighting: Marineland double bright LED
Lighting Cycle: 8 on, 16 off
Other Tank Inhabitants: cortez ray, two lookdowns
Broodstock Feeding Details Food Types: mix of fish flesh, shrimp, squid, crab
Feeding Schedule: 3 - 4 times per week
Spawning Details Date of First Spawn: 1/26/2013
Spawn Time of Day: late night/ early morning (middle of night sometime)
Dates of Consecutive Spawns: 2/19/13, 2/20/13, 3/05/13, 3/16/13, 3/22/13(wind egg), 3/28/13(wind egg), 3/29/13
Courtship Details: Male follows female around tank and also swims parallel with female around the tank. When female stops, the male will nudge his head into the female by the gill region. He will also nip on the sides, the top, and tail region. During mating witnessed 2/26/13 @ 5:28 pm, the male bit onto the female on the top of her body, above the pectoral fins. While attached to her and swimming around the tank, the male claspers erected outward in opposite directions. The male then curled his body around and inserted one of his claspers. This mating event lasted approx 30 - 60 seconds. I have witnessed the courtship behavior lasting longer, but the total time has been unverified.
Egg Size: 7cm
Egg Color: light brown, egg shifts to dark brown as it ages
Egg Count: 22 as of 7/02/13. Egg #5 laid 3/05/13 first viable one
Hatch Details Hatch Date: 7/02/13
Hatch Time of Day: Middle of night (Found out of egg casing around 2:00 am)
# Days after Spawn: 119 days
Larvae Description: Shark is born fully developed. This shark was hatched at 10.5 cm and weighed 5.3 grams
Consecutive Hatch Dates: Larval Tank Details Not Applicable, these sharks hatch fully developed, larval stage occurs inside of egg casing
Temperature: Size of Larval Tank: Substrate Details: Other Tank Decor: Filtration Details: Lighting: Lighting Cycle: Water Changes: Larval Feeding Details Not Applicable, these sharks hatch fully developed, feeding occurs inside of egg casing via yoke sack
Food Types: Feeding Schedule: Metamorphosis/Settlement Date of Settlement Start: 7/02/13
Days after Hatch: 0
Date of Settlement End: 7/02/13
Description of Fry: born fully developed and independent
Grow-Out Tank Details Temperature: 24.4 C
Size of Grow-Out Tank: 9"x"6"x6.5" critter keeper, placed inside main tank. The size of this is for ease of feeding and cleanup.
Substrate Details: none
Other Tank Decor: small amount of live rock to weigh down critter keeper and provide sense of security
Filtration Details: live rock, protein skimmer, large canister filter
Lighting: Nearby window
Lighting Cycle: natural light in room
Water Changes: 25 US gallons per week (from total system water volume)
Size at Transfer: 10.5 cm
Age at Transfer: 119 days / 0 days. After 119 day development period in egg casing, shark is born fully developed and independent, and was immediately transfered to grow-out tank upon hatch.
Grow-Out Feeding Details Food Types: live feeder shrimp (Penaeus vannamei), thawed frozen mysis
Feeding Schedule: twice daily
Additional Information (No Pictures or Videos in the Section Please) Miscellaneous Information: At the end of May, sharks and eggs were moved from Chicago to Minneapolis with zero losses. They currently reside in two large stock tanks linked together. Parents are in one, eggs, live rock, skimmer, are in the other. Additional filtration provided by a large canister filter. Note: this is a temporary setup until residents can be moved into a much larger 500 gallon pond setup which is waiting completion. Everyone is happy and there have been six more viable eggs in this setup.
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<message edited by Riley on Monday, October 14, 2013 8:53 PM>