The ditch-growing frog, also known as a semi-manual frog, is a species that can be collected and raised from pupae to adult frogs. This process involves some manual intervention, such as assisting in the hatching and early development stages to improve survival rates. Once the frogs are released into the forest, they grow naturally by feeding on available insects. This article explores seven key aspects to consider when raising these frogs, aiming to help farmers avoid common mistakes, increase the survival rate of young frogs, and ultimately achieve better economic returns.
1. **Ensure Sufficient Water in the Hatching Pond**
During dry seasons, water supply can be unreliable. To prevent the young frogs from dying due to dehydration, dig a deep pit in the center of the hatching pond to create a "funnel" shape. This allows the grasshoppers to retreat to the deeper water when the surface level drops. Check the pond daily and refill it as needed to maintain adequate water levels.
2. **Control Stocking Density**
At the beginning of the hatching phase, the number of frogs per square meter should not exceed 4,000. Overcrowding can lead to stress and disease. If the density becomes too high, transfer some frogs to other pools. As the frogs grow older, gradually reduce the number of individuals per unit area to ensure sufficient space and resources.
3. **Prevent Predators**
Before entering the forest, crickets face threats from birds, snakes, and rats. Ducks are another major predator. It's important to protect the hatching ponds by sealing any entry points for snakes and rats, and using deterrents or traps to control their populations. Additionally, keep wild ducks away from the area.
4. **Monitor for Disease**
Red leg disease is a common issue among forest frogs. If you notice symptoms like redness on the legs, isolate the affected frogs immediately. Place them in a pool with a 5% potassium permanganate solution for 24 hours, then transfer them to a clean, normal pond to recover.
5. **Choose a Safe Route for the Frogs to Move Uphill**
When moving young frogs to higher ground, avoid steep slopes or cliffs. Instead, guide them to gentle inclines to reduce the risk of predation and make it easier for them to find food. A smooth path helps prevent group separation, which can attract predators and lead to high mortality.
6. **Provide Supplementary Feed**
In the early stages, if the natural insect population is insufficient due to high stocking density, supplement the diet with low-grade yellow mealworms. This ensures that all young frogs have enough food to grow and develop properly.
7. **Protect Frogs from Human and Animal Disturbance**
When frogs are moving uphill, restrict human activities such as collecting vegetables or grazing livestock in the forest. These activities can accidentally trample the frogs, leading to injury or death. Implementing controlled access during critical periods helps ensure the safety of the young frogs.
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