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: Rhinoptera bonasus (Cownose Ray)
Social Structure: 20F, 5M Size of Individuals: Adults 2'-3' disk size Age of Individuals: Unknown, sexually mature
Date added to Tank: In collection since spring 2012
Broodstock Tank Details Size of Tank: 11,000 gallons
Substrate Details: none
Filtration Details: 2 Hayward pool pumps, 2 triton sand filters, 1 carbon reactor, 1 biotower
Water Changes: 50% every day
Water Temperature: 75-83* depending on season
Lighting: Natural
Lighting Cycle: Other Tank Inhabitants: 4 D. americana, 2 S. tiburo Broodstock Feeding Details Food Types: Capelin 50%, Squid 10%, Clam 10%, Krill 10%, Shrimp 5%, Mackerel 5%
Feeding Schedule: 2-7x per day depending on season. Animals go through feast and famine cycles.
Spawning Details Date of First Spawn: Unrecorded but mating occurred all through April - August
Spawn Time of Day: Usually after a meal
Dates of Consecutive Spawns: 4 months
Courtship Details: "Muenster" and "Sandy" most active males observed mating (which is odd considering Muenster is largest male and Sandy is the smallest)
Egg Size: live birth
Egg Color: Egg Count: Hatch Details Hatch Date: March 25th (dead), April 2nd, April 3rd, April 10th (dead), May 11th
Hatch Time of Day: Between Late night and Early Morning
# Days after Spawn: between 6 months to a year
Larvae Description: Between 6-8" wide, the 3 that survived birth took several days to begin eating
Consecutive Hatch Dates: Total 5 babies were born, 2 died upon birth
Larval Tank Details Temperature: 75F-83F
Size of Larval Tank: Initially 1000 gallons
Substrate Details: none
Other Tank Decor: none
Filtration Details: 1 hayward pump, 1 triton sand filter, 1 carbon reactor, 1 biotower
Lighting: natural
Lighting Cycle: natural
Water Changes: 50-75% daily
Larval Feeding Details Food Types: Superba Krill, PE Mysis both soaked in selcon 2x per week and Mauzri Shark and Ray vitamins
Feeding Schedule: 5-7X per day from 9am to 4pm
Metamorphosis/Settlement Date of Settlement Start: Fully settled at birth
Days after Hatch: Date of Settlement End: Description of Fry:
Grow-Out Tank Details Temperature: 75*-83*
Size of Grow-Out Tank: 11000 gallon pool
Substrate Details: None
Other Tank Decor: None
Filtration Details: 2 Hayward pumps, 2 triton sand filters, 1 carbon reactor, 1 biotower
Lighting: Natural
Lighting Cycle: Natural
Water Changes: 30% every 3-5 days
Size at Transfer: 8-11"
Age at Transfer: moved on 6/14
Grow-Out Feeding Details Food Types: Same as above but added in small pieces of adult foods
Feeding Schedule: 5-7x per day
Additional Information (No Pictures or Videos in the Section Please) Miscellaneous Information: The two still births could have been due to medicating of the broodstock animals with Dylox in October or the first stillborn might have been due to birthing complications, and the second to getting predated upon in the pool by a large southern stingray. Breeding activity peaked after birth of each baby.
You will be required to provide photographic or video 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. PHOTOS AND VIDEO S MUST BE PLACED IN ADDITIONAL POSTS, NEVER IN THE FIRST POST IN A JOURNAL.