Betta Spawn Log : BSL20180125 : HMPK Marble (M) x HMPK Blue (S)

Our next breeding project after the success of the Gold HMPK. We did so to compare to study and compare the male Betta behaviour in leaving the father with fry breeding method. Interestingly, both spawns

Male: HMPK Marble (Pinkish white with blue dots)
Age: 5+ months
Temperaments: Curious and chill.
Size: Medium (3.0cm body only)
Grade: B

Our first HMPK marble male Betta. Initially we bought him from local aquarium shop due to its slim and rectangular body size. We didn't realize that the male Betta was still a junior. As the male aged, the body shape grew to a normal HMPK size, an oval rounded shape around the head.

Female: HMPK Blue
Age: 3+ months
Temperaments: Aggresive
Size: Medium (2.5cm body only)
Grade: C

The same female Betta that we used for breeding after the failed first breeding spawn. Initially we thought it will not work, but surprisingly it did. Unfortunately, the female was one of the casuality due to Ich or white spot disease outbreak. Always quarantine your fishes before introduced to any community tanks.

Log Notes
Both male and female Bettas have been released into the breeding tank. The regular tagging and courting followed through. Initially we thought this spawn will not work as the female Betta have been used for other breeding spawn project. Hence, we left both fishes alone overnight to have more privacy to continue their breeding.

When the male Betta started to attack the female Betta, we assumed that the mating have completed. Surprisingly, when we saw the number of fry, we realized this spawn has the biggest number of fry, roughly around 200-plus. We were sharking our head on how to get more plastic jar and where to store these Betta after 2-plus months.

We were surprised that the total fry population have been reduced to 20-plus fry. There were two possible reasons, the male Betta have eaten quite a number of those fry or there was an infection where most of the weak fry have been infected and died. Googled answer suggested the former explanation. The next action was to remove much of the floating plants which gave us much more clearer view of the whole breeding tank. We also fed the male Betta more frequently or larger meal.

In order to increase the size of the fry, we've decided to change 50% of the water on daily basis and feed the fry 2 or 3 times per day.

It has been 6-plus months and we haven't jar any of the juvenile Bettas in the breeding tank. Both the male Betta (father) and its offspring were living together harmoniously. We were wondering because some or all the younger Bettas were female Bettas? A few observations during this 3 months gap:

1/ The male Betta (father) was fighting for food (pellets) with these younger Bettas.

2/ No casualty and infighting within this spawn. The male Betta did not act like the alpha male within the group but like a sibling contrary to what we read online regarding the leaving fry with father method.
3/ Growth rate was slow. Even after 6-plus months, some Bettas body size still remains at normal 2 months growth size.

4/ Most of the younger Bettas did not show any good colourization. Most likely the male Betta (father) gene have override the female Betta gene. 

5/ No sickness ever encountered within this spawn compare to others. We're not sure but every fishes seem quite healthy. Maybe because the abundant of Amazon Frogbit and the water always infected with Green Algae.

Moved the male Betta out as it has infection on its head and was put under medication.

Moved all the Betta into the main female community tank. We assumed that all the Betta left in the tank were female.

1/ Jar the young Bettas around 1.5 months to make sure they grow faster. According to the online literature (unproven and just observation), bigger fry will release hormone that inhibit the growth of younger fry due to competition. We found this quite true for other breeding project where we jarred these Bettas and can observer immediate growth rate within a few days.

2/ It's quite hard to have fair food allocation for each Bettas within the breeding tank. The male Betta (father) body size shrunk as these fry grown bigger and have to fight for food against them.

3/ Because when breeding Marble Betta. You may obtain a spawn of Betta fishes with no colour patterns or ugly colour patterns. We can't find one single good quality (good looking) Bettas within this spawn although this was the healthiest group.

No comments:

Post a Comment