Single Dome Halogen Operating Lamp
Single Dome Halogen Operating Lamp with excellent color temperature control.By using color temperature compensation technology, the color reversion is uprised, and it is more suitable for the illumination of the complex surgery such as encephalon surgery and thorax surgery.Single Dome Halogen Operating Lamp are convenient to use. Reflector system designed in CAD; color temperature close to that of sunlight; making the tissue surface visible under natural color; depth of tubular light beams up to over 1200mm; uniform illumination effectively eliminating shadows under any circumstance.
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Breeding of fingerlings
The process of cultivating fine-scale bream fish involves raising summer fish species to a larger size suitable for wintering, typically reaching 6–9 cm in length. This is commonly achieved using ponds, cement pools, cages, and bays. The method combines initial pond rearing with later-stage wintering, ensuring optimal growth conditions throughout the season. Below are the key steps involved in this cultivation process.
**I. Pre-cultivation of Fish Fingerlings**
This stage involves raising young fish in ponds before they are transferred to wintering areas. It includes several important practices:
1. **Pond Conditions**: The ponds used for pre-cultivation are similar to those used for fry, with an area of 2 to 5 mu and a water depth of 1.5 to 2.0 meters. These conditions help support the early development of fish.
2. **Preparation Before Stocking**: Before introducing fish, the pond must be disinfected, predators removed, and base fertilizers applied. Organic compost and manure are often used to enrich the water, providing natural food sources for the fish. This preparation should occur 5–10 days before stocking.
3. **Stocking Density**: The number of fish per acre depends on factors like pond size, water depth, and feed quality. High-quality ponds can hold 20,000–30,000 fish per acre, while average ones may hold 10,000–15,000. Healthy, uniform fish with strong vitality are selected for stocking.
4. **Feed Management**: Proper feeding is crucial for rapid growth. Initially, fine powder mixed with blood meal is used, gradually transitioning to pellet feed as the fish grow. Feed should contain about 30% crude protein, with higher animal protein content for younger fish that decreases as they mature.
**II. Feeding Techniques**
Feeding is done regularly, usually 2–3 times daily, depending on the fish’s behavior and environmental conditions. Morning and afternoon feedings are common, with adjustments made during hot or rainy weather. Food tables are set up in the pond, allowing fish to gather and feed efficiently.
**III. Daily Management**
Water quality is the top priority. Ponds are inspected daily for changes in color and fish behavior. Regular water exchanges are performed to maintain oxygen levels and prevent deterioration. Aerator use is recommended during high temperatures to ensure even oxygen distribution.
**IV. Disease Prevention**
Food tables are cleaned every 2–3 days, and periodic disinfection with bleaching powder helps control disease. Weeds and debris are also removed regularly to maintain hygiene.
**V. Wintering Preparation**
By mid-October, fish reach 5–6 cm and begin to slow their feeding due to falling temperatures. At this point, they are moved to wintering ponds to avoid frost damage. Before transfer, feeding is stopped for 4–5 days, and fish are exercised through netting to prepare them for transport. They are then sorted, disinfected, and moved to wintering pools under favorable weather conditions.
Fish disinfection is done using methylene blue, potassium permanganate, or a salt bath for 30 minutes. Careful handling during all stages ensures minimal stress and injury to the fish, promoting successful growth and survival.
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