Boleophthalmuspectinirostris is classified as a scorpion-shaped fish, and it is commonly known as jumping fish. Bullockfish are often sold as live fish. They are rich in nutrients and have delicate meat. They are suitable for frying, stewing and frying. They are used to make various dishes and have nourishing body functions. They are popular with consumers and have become one of the fish species that people like to eat. But because Environmental conditions and resources are subject to varying degrees of damage while production is low, prices are high, and supply falls short of supply. Due to its large aquaculture development prospects, it has attracted a great deal of interest from farmers. The following is a brief introduction of the artificial breeding technology of the big bored fish.
First, the body characteristics of large eel catfish individual small, mature individual is generally 80 mm to 90 mm long, weighing 15 grams to 25 grams; large individuals up to 120 mm to 150 mm, weighing 30 grams to 40 grams. The body side is flat, the back edge is straight, the ventral edge is lightly curved, the tail shank is taller, and the body and head are rounded. The first dorsal fin is high, the base is short, and there are five fin spines extending in filamentous shape; the second dorsal fin is lower, and the caudal fin base is backward and backward, the pelvic fins are short, the pectoral fins, and the caudal fins are all rounded. Body blue-brown or gray-brown, with 6 to 7 gray-black stripes located along the dorsal pedicle base at the upper part of the body, many bright blue dots spread across the body and head, white belly, dark blue first dorsal fin, second dorsal fin Blue-gray, pale yellow pelvis, caudal fins grayish black.
Second, habits and habits The big salamander fish is a small fish that is warm, warm, tropical, and coastal. It inhabits brackish fresh waters in estuaries, near-shore tidal flats, or muddy low tide areas, and is resistant to harsh water quality. Wide-salinity, hi cave dwelling, the hole is generally Y-shaped, consisting of a hole, a positive orifice, and a posterior orifice. Positive orifices are used for access, and rear orifices are used for ventilation. Rely on the pectoral and caudal peduncles to crawl or jump on the water, on the beach or on the rocks. Apply to the mud to feed benthic diatoms, blue-green algae, and eat a small amount of copepods and organic matter.
Third, the reproduction and growth Bullet fish breeding season for the annual April to September, each broodstock can spawn about 10,000. The eggs are spherical and sticky yellow. In summer and autumn, a large number of fry can be seen in the estuarine zone where the seawater salinity is less than 1.015. Its growth rate is slow, and it usually takes 1 to 2 years from seedlings to adult fish.
IV. Farming and Fishing The culture of big-bolted fish has long been popular in some areas of Taiwan and Southeast Asia and is still relatively rare in mainland China. The construction of the big battered fish culture pond is generally the bottom of the pool should be higher than the low tide line and must be flat, the bottom quality is better with clay; the depth of the pool is 5 cm ~ 15 cm more appropriate, too deep is not conducive to growth; the pool water salinity is 1.010~1 Between .020; the water temperature grows faster at 24°C~30°C; before the fry is released, it must be used to dry the floor, apply the base fertilizer, disinfect, remove the miscellaneous fish and predators, and then inject water to cultivate the algae. The fry stocking time is generally from June to September, and the stocking amount per hectare is usually 30,000. The growth rate of the big salamander fish is related to the pond environment, algae status, and management techniques. The fishing harvest time is 1 year to 2 years.
Large catch fish can be caught by hand catching method, cage catching method and hanging net method. The method of catching the hand is to catch the fish hole directly by the catcher, and the hand catches directly along the hole. The disadvantage is that the survival rate after fishing is low. The cage trapping method is to catch the fish hole after the catcher, close the hole with mud, use the mouth of the fish cage to insert it into the positive hole, wait until it is out of the hole and enter the fish cage and capture it. The method of hanging nets is to use the habit of large-bombed fish, first discharge the pool water to 2 cm shallow or drain the pool, and set up the hanging net at the water inlet of the pond, and use the water at the high tide to inject water slowly. The large-scale mud-coated fish will cluster countercurrently into the net. Pull the rope to lift the catch.
5. Breeding and Breeding of Large-scale Bullet-bearing Fish and Earthen Pond Breeding and breeding pond structure uses the original bomb-bearing fish breeding pond of 17 mu, with a water depth of 50 cm to 80 cm and ground sediment as sediment. There are several rows of digging trenches in the pool. Divide a ditcher every 2 meters. The size of each ditches is 1 meter wide and 30 to 40 centimeters deep. Formed around the ditch around the ring cloth, and the pool of water to open up each other unimpeded. The entire nursery pond is rectangular, and the two sides of the pond are slightly deeper, which is conducive to the collection of fish, fish, and fish. In the ditch, a cylinder made of ceramics is placed every 2 meters horizontally, with a diameter of 10 centimeters and a length of 50 centimeters.
First, the body characteristics of large eel catfish individual small, mature individual is generally 80 mm to 90 mm long, weighing 15 grams to 25 grams; large individuals up to 120 mm to 150 mm, weighing 30 grams to 40 grams. The body side is flat, the back edge is straight, the ventral edge is lightly curved, the tail shank is taller, and the body and head are rounded. The first dorsal fin is high, the base is short, and there are five fin spines extending in filamentous shape; the second dorsal fin is lower, and the caudal fin base is backward and backward, the pelvic fins are short, the pectoral fins, and the caudal fins are all rounded. Body blue-brown or gray-brown, with 6 to 7 gray-black stripes located along the dorsal pedicle base at the upper part of the body, many bright blue dots spread across the body and head, white belly, dark blue first dorsal fin, second dorsal fin Blue-gray, pale yellow pelvis, caudal fins grayish black.
Second, habits and habits The big salamander fish is a small fish that is warm, warm, tropical, and coastal. It inhabits brackish fresh waters in estuaries, near-shore tidal flats, or muddy low tide areas, and is resistant to harsh water quality. Wide-salinity, hi cave dwelling, the hole is generally Y-shaped, consisting of a hole, a positive orifice, and a posterior orifice. Positive orifices are used for access, and rear orifices are used for ventilation. Rely on the pectoral and caudal peduncles to crawl or jump on the water, on the beach or on the rocks. Apply to the mud to feed benthic diatoms, blue-green algae, and eat a small amount of copepods and organic matter.
Third, the reproduction and growth Bullet fish breeding season for the annual April to September, each broodstock can spawn about 10,000. The eggs are spherical and sticky yellow. In summer and autumn, a large number of fry can be seen in the estuarine zone where the seawater salinity is less than 1.015. Its growth rate is slow, and it usually takes 1 to 2 years from seedlings to adult fish.
IV. Farming and Fishing The culture of big-bolted fish has long been popular in some areas of Taiwan and Southeast Asia and is still relatively rare in mainland China. The construction of the big battered fish culture pond is generally the bottom of the pool should be higher than the low tide line and must be flat, the bottom quality is better with clay; the depth of the pool is 5 cm ~ 15 cm more appropriate, too deep is not conducive to growth; the pool water salinity is 1.010~1 Between .020; the water temperature grows faster at 24°C~30°C; before the fry is released, it must be used to dry the floor, apply the base fertilizer, disinfect, remove the miscellaneous fish and predators, and then inject water to cultivate the algae. The fry stocking time is generally from June to September, and the stocking amount per hectare is usually 30,000. The growth rate of the big salamander fish is related to the pond environment, algae status, and management techniques. The fishing harvest time is 1 year to 2 years.
Large catch fish can be caught by hand catching method, cage catching method and hanging net method. The method of catching the hand is to catch the fish hole directly by the catcher, and the hand catches directly along the hole. The disadvantage is that the survival rate after fishing is low. The cage trapping method is to catch the fish hole after the catcher, close the hole with mud, use the mouth of the fish cage to insert it into the positive hole, wait until it is out of the hole and enter the fish cage and capture it. The method of hanging nets is to use the habit of large-bombed fish, first discharge the pool water to 2 cm shallow or drain the pool, and set up the hanging net at the water inlet of the pond, and use the water at the high tide to inject water slowly. The large-scale mud-coated fish will cluster countercurrently into the net. Pull the rope to lift the catch.
5. Breeding and Breeding of Large-scale Bullet-bearing Fish and Earthen Pond Breeding and breeding pond structure uses the original bomb-bearing fish breeding pond of 17 mu, with a water depth of 50 cm to 80 cm and ground sediment as sediment. There are several rows of digging trenches in the pool. Divide a ditcher every 2 meters. The size of each ditches is 1 meter wide and 30 to 40 centimeters deep. Formed around the ditch around the ring cloth, and the pool of water to open up each other unimpeded. The entire nursery pond is rectangular, and the two sides of the pond are slightly deeper, which is conducive to the collection of fish, fish, and fish. In the ditch, a cylinder made of ceramics is placed every 2 meters horizontally, with a diameter of 10 centimeters and a length of 50 centimeters.
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