5 results about "Forage fish" patented technology

The present disclosure relates to an apparatus (100) for collecting waste in a marine environment (150) and a method for its implementation. The apparatus (100) provides an efficient approach to collect marine waste, including uneaten feed, fish feces, and organic debris, thereby improving water quality and maintaining a healthy aquaculture ecosystem. The apparatus (100) includes a substantially conical fabric with holes (101), each covered by an elongated flap (102) having a first end (103) fixed to the fabric and a second end (104) freely movable. The freely movable flaps (102) allow water to pass through the holes (101) while guiding waste toward a centrally positioned waste collection unit (600) at bottom of the conical structure. The configuration ensures effective waste capture, unobstructed water flow, and minimized hydrodynamic drag. This scalable and modular design offers a sustainable solution for marine waste management, facilitating easy installation, maintenance, and environmental conservation.

The present application belongs to the technical field of aquaculture, and particularly relates to a Decapterus maruadsi breeding feed and application thereof in improving quality of Decapterus maruadsi fertilized eggs. The present application provides a Decapterus maruadsi breeding feed, which comprises two independent first and second feeds; the first feed comprises a basic feed, fish pulp and a nutritional supplement; the second feed comprises the first feed and oyster meat; and the nutritional supplement comprises calcium pantothenate, vitamin B1, vitamin B2, vitamin B6, vitamin C and vitamin F. The Decapterus maruadsi breeding feed can be used for nutritional supplement of Decapterus maruadsi parent fish, so as to promote synchronous development of gonads of male and female parent fish, improve quality of Decapterus maruadsi fertilized eggs, and increase good egg rate of Decapterus maruadsi fertilized eggs to 88.50%, which is 39.15% higher than that of a control group, and improve fertilization rate of Decapterus maruadsi fertilized eggs to 79.58%, which is 19.46% higher than that of the control group.

The application discloses a feed fish with hard bone dorsal fin and ventral fin removing device, which comprises a top plate arranged on the upper side and a bottom plate arranged on the lower side, and the top plate and the bottom plate are connected through a support plate to form a frame structure; an inclined conveying channel is arranged between the top plate and the bottom plate, and the conveying channel is gradually inclined from a fish body inlet end to a fish body outlet end; a fish tail clamping mechanism, a dorsal fin removing mechanism and a fish head clamping mechanism are sequentially arranged above the conveying channel along the fish body conveying direction, a hollow ventral fin bottom hole is arranged at the bottom of the conveying channel and is opposite to the ventral fin of the fish body, and a ventral fin removing mechanism is further arranged on the bottom surface of the conveying channel. The application further discloses a mandarin fish breeding method using the feed fish with hard bone dorsal fin and ventral fin removing device. Compared with the prior art, the technical scheme of the application can efficiently remove the dorsal fin and the ventral fin of the fish, guarantee normal feeding of the mandarin fish and reduce the mandarin fish breeding cost.

This invention discloses a method for preparing and applying a low-chitin enzymatic hydrolysed cricket feed based on Trichoderma and copepod autolysins, belonging to the field of aquaculture technology. This invention employs a combined enzymatic hydrolysis method using Trichoderma activation and copepod autolysins, which not only significantly reduces the chitin content in the cricket feed (to below 1%), but also optimizes the nutritional composition of the feed by introducing marine functional proteins from copepods. This not only replaces fishmeal in feed but also contributes to the growth and health of aquatic animals.

The application belongs to the field of fishery, and particularly discloses a device and method for off-season breeding of parent fish of Eleutheronema tetradactylum. The device comprises a water storage container and a breeding container connected with the water storage container. The water storage container is connected with a large constant temperature cooler. The breeding container has a plurality of breeding units, each of which is installed with an LED lamp and connected with a small constant temperature cooler. In the device, the seasonal breeding conditions are simulated by adjusting the temperature and light changes. The cold temperature accumulation treatment, temperature rising treatment and temperature jump treatment are sequentially performed. The feed fish is nutritionally enhanced before breeding to supplement the nutrition of the parent fish. Through the device and method, the Eleutheronema tetradactylum can be successfully bred in the non-natural breeding season, and the breeding, breeding and sales in the same year are realized, which is suitable for large-scale promotion.