From the horse mouth, people who successfully pair, breed and raised Copperband Butterflies
Jirayuth Ruensirikul, Mavit Assava-aree, Atra Chaimongkol, Sirawan Bunchai, and Khwantana Ongart of Coastal Aquaculture Research Institute and Nakhonsithammarat Coastal Fisheries Research and Development Center
With this in mind, I like to have pictures of CBB to see if we can guest if we can correctly sex CBB, or at lease see the differences. I have two that are not in the same tank. Both are doing well. I think I see the differences they are talking about, but I would love to see pictures of these characteristics.
Apparently the sexual dimorphism is minor and does not show until the fish at about 2.5+ inches. Over the next few weeks I will try to post profile pictures of my CBB and see if I can clearly see the differences.
I always love to have a pair of CB in my tank but gave up after several unsucessful tries. With this information, I may try again if I can determine that my two are of different sex.
Jirayuth Ruensirikul, Mavit Assava-aree, Atra Chaimongkol, Sirawan Bunchai, and Khwantana Ongart of Coastal Aquaculture Research Institute and Nakhonsithammarat Coastal Fisheries Research and Development Center
Sexual dimorphism identification, pairing and spawning in captivity of wild copperband
butterflyfish, Chelmon rostratus (Linnaeus, 1758) were investigated. Sexual dimorphism
identification was studied by snout morphology comparison of both sexes. The results showed
that the morphology of snout of male and female were differed. The snout of male occupied a
small hump of 1-2 mm height protrusion and higher slope than female. Percent of correct
identification in male and female was differ significantly (p<0.05) that were 83.33% and 100%
respectively. Paring experiment had 5 treatments with 4-6 replications (pairs): male and female
were put in the tank simultaneously (control group: T1), male was put in the tank for 1 week prior
to female (T2), female was put in the tank for one week prior to male (T3), male was placed in
floating basket held in the same tank as female for 1 week before releasing into the tank (T4) and
female was placed in floating basket held in the same tank as male for 1 week before releasing
into the tank (T5). Pairing results of each treatment was significantly different (p<0.05). Percent
of pairing acceptance of T1 (16.67%) was lower than those of T2-T5 (40-100%). Spawning in
captivity of this species was monitored. Spawning data, egg and first 10 days larval development
were recorded. One pair spawned after rearing for 12 months. Number of spawning was 7 times
with 1,940-2,780 eggs per each. The egg was pelagic of 663.00+17.04 μm in diameter with single
oil globule of 132.60+6.30 μm. Newly hatch out larvae was 1.36+0.02 mm of total length. The
mouth was opened at 2 days old at 83-110 μm. Yolk and oil globule were completely absorbed
at 3 and 6 days old respectively. Head spination near pelvic fin was prolonged obviously at 10
days old larvae. This study was revealed the differentiation of sexual dimorphism with snout
shape, successful pairing and spawning in captivity of copperband butterflyfish.
Keywords: Copperband butterflyfish, Chelmon rostratus, sexual dimorphism, paring,
Spawning
With this in mind, I like to have pictures of CBB to see if we can guest if we can correctly sex CBB, or at lease see the differences. I have two that are not in the same tank. Both are doing well. I think I see the differences they are talking about, but I would love to see pictures of these characteristics.
Apparently the sexual dimorphism is minor and does not show until the fish at about 2.5+ inches. Over the next few weeks I will try to post profile pictures of my CBB and see if I can clearly see the differences.
I always love to have a pair of CB in my tank but gave up after several unsucessful tries. With this information, I may try again if I can determine that my two are of different sex.
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