Red tilapia and its main cultured species

Red tilapia, also known as "red tilapia" in Guangdong, "Hong Wu Guoyu" in Taiwan, and "Aka Koi" in Japan, is a unique variety of tilapia characterized by its vibrant red coloration, absence of dark pigmentation in the body cavity, tender flesh, and rapid growth rate. This fish has gained popularity worldwide, with cultivation in countries such as Israel, the United States, Thailand, the Philippines, and Taiwan. In mainland China, red tilapia was first introduced in 1973 by Chinese descendants and placed at the Pearl River Fisheries Research Institute. It was later reintroduced from Taiwan in 1981, leading to widespread breeding and aquaculture efforts. In the early 1990s, the coastal shrimp farming industry faced disease outbreaks, leaving many ponds unused. This prompted farmers to explore alternative species, and red tilapia quickly became a viable option. Over the past decade, various strains have been introduced, selected, and promoted for breeding and culture. Below are the key biological characteristics and main farmed species: **Biological Characteristics** 1. **Body Size and Color**: Red tilapia is a hybrid variant of tilapia, with varying levels of heterozygosity across different regions and strains. Its color can range from pink, red, to orange, with some offspring showing black spots. Body types include Nile tilapia, Onyx, and Mozambique styles. 2. **Habitat and Behavior**: Like other tilapia, it is a tropical, euryhaline fish that tolerates low oxygen levels and can survive in salinity levels from 0 to 30 ppt, and temperatures between 15°C to 38°C, with a minimum lethal temperature of 7°C and a maximum of 42°C. It is omnivorous, feeding on phytoplankton, zooplankton, algae, and organic debris, and can also be raised on commercial feeds like soybean meal, fishmeal, and compound feed. 3. **Growth and Reproduction**: Red tilapia grows rapidly, with fry reaching 150–750 grams within one year. They typically reach sexual maturity in 100–120 days, depending on the strain. For example, the Hongzhou and Hongqi strains mature at around 300–400 grams. Methyltestosterone can be used to induce male development, achieving over 95% male rates. **Main Cultivated Species** 1. **Red Nile Tilapia**: Resembles the Nile tilapia in shape, with an orange or reddish hue. Selected for high growth and thick body, with a red color rate up to 75%. Though slightly slower in growth, it is more disease-resistant. 2. **Flower Bud Tilapia**: Introduced from Taiwan, this strain exhibits a wide range of colors, including red, orange, black, and gray. It grows faster than the Red Nile type but requires careful selection due to high color variation in offspring. 3. **Rainbow Tilapia**: A newer strain with pink or red hues, mainly bred in Taiwan and Fujian. It has a high red color rate (over 96%) and grows quickly, though about 10–15% may show discoloration. 4. **Sin Chau Red Tilapia**: Derived from Southeast Asian strains, it has a high back, transparent scales, and a bright red or pink color (over 99%). Offspring exhibit minimal color variation, and while they may turn gray in cold seasons, they regain their red color when water temperatures rise. This strain is known for fast growth, large size, and tender meat, making it an excellent candidate for further promotion.

Fire Alarm By Kitchen

Fire Alarm By Kitchen,Fire Alarm Of Kitchen,Fire Smoke Alarm Of Kitchen,Fire Smoke Alarm Kitchen

Guangdong Isafenest Co.,Ltd. , https://www.isfenest.com