CN106259220A - A kind of biological breeding method of brown Chang prelarva open-mouthed bait - Google Patents

Abstract

A kind of ecological cultivation method of open bait for larvae brown calamari, characterized in that the bait cultivation pond has cement or film slope, the bottom is non-seepage mud or silt, the water depth is 1-2m, and an independent inlet is equipped. Drainage facilities and aerators; every year from December to January of the next Gregorian calendar, use 20ppm bleaching powder with water to disinfect the bait cultivation pond, and after 2 days, use 150kg/mu of quicklime to dry the pond to disinfect. 60-mesh sieve silk net, the water source is natural river water, salinity 1.2-2.0; one week after the bait cultivation pond enters the water, the pool water is yellow-green, collect copepods from other ponds and inoculate them into the bait cultivation pond; after the copepods are inoculated, stock them Feed prawn compound feed once a day for ridgetail white shrimp and second-year-old swordfish; when the water temperature rises above 15°C, collect copepod nauplii, small protozoa and rotifers and other small zooplankton as brown calamari larvae open bait.

Description

A kind of ecological breeding method of bait for larvae of brown squid larvae

technical field

The invention relates to a method for cultivating fish bait, in particular to a method for ecologically cultivating bait for larvae of brown squid larvae.

Background technique

Brown calamus (Sebastiscus marmoratus) is a warm-temperate bottom oviviparous fish belonging to the order Scorpionidae, suborder Scorpio, family Scorpionidae, and the genus Scorpion. It is widely distributed in coastal areas and is a sedentary fish on islands and reefs. Because of its tender meat, delicious taste and high economic value, it is one of the best species for marine ranching, fishing and leisure tourism. In recent years, due to the continuous upgrading of marine fishery tools and the continuous warming of recreational fishing, the resources of the brown calamari are increasingly depleted. The primary problem in breeding is the opening of the larvae. At present, rotifers are generally the main bait for fish fry, while the breeding season of the brown calamari is winter and spring, and there are two peak periods, respectively from November to December and from February to April. During this period, the reproduction of rotifers cannot satisfy The demand for industrialized seedling raising of brown calamus, and some species of copepods have the characteristics of small size, fast reproduction, wide temperature and wide salt, so nauplii can also be obtained under low temperature conditions as opening bait for fry, and studies have shown that Copepods are rich in EPA and DHA, two essential high-unsaturated fatty acids for fish, and are excellent natural bait for fish. Copepods go through 12 developmental stages from nauplii to adults, providing fish fry with A wide range of bait was purchased. Therefore, carrying out the artificial cultivation of copepod nauplii has become an important breakthrough to solve the opening of the larvae of scorpionfish.

Contents of the invention

The purpose of the present invention is to provide a kind of ecological cultivation method of the bait of the larvae of the brown calamari, which creates conditions for the large-scale artificial breeding of the brown calamari.

The technical scheme of the present invention includes the equipment of the bait cultivation pond, the inoculation and collection of copepods, and is characterized in that the bait cultivation pond has a cement or film slope, the bottom is non-seepage muddy or silty, and the water depth is 1 ～2m, the top is an artificially constructed steel wire plastic greenhouse, equipped with independent water inlet and drainage facilities and aerators; every year from December to January of the following year, 20ppm bleaching powder with water is used to disinfect the bait cultivation pond, and after 2 days, the bottom of the pond is pumped out Water, and then use 150kg/mu of quicklime to carry out dry pond disinfection, after a week of exposure to the sun, enter the water, the water inlet is covered with 60-mesh sieve silk, the water source is natural river water, and the salinity is 1.2-2.0; after entering the bait cultivation pond for a week, the pool water is Yellow-green, collect copepods from other ponds and inoculate them into the bait cultivation pond, 0.5-1 copepods/ml in the bait cultivation pond; The stocking density of white shrimp is 3-6kg/mu, the stocking density of second-year-old swordfish is 300-500 tails/mu, and the prawn compound feed is fed once a day; when the water temperature rises above 15°C, there will be A large number of copepod nauplii, a small amount of small protozoa and rotifers and other small zooplankton, collect copepod nauplii, small protozoa and rotifers and other small zooplankton as the opening bait for the larvae.

Compared with the prior art, the outstanding features of the present invention are: 1) solve the problem that the open bait cannot be obtained in the low temperature season in the cultivation process of the scorpionfish seedling; 2) use the greenhouse technology to obtain a large amount of open bait one month earlier , which laid the foundation for the industrialized nursery of the brown calamari; 3) Using the biological suppression method, a large amount of open bait can be collected from the middle and late March to the beginning of June; In order to suppress the large zooplankton in the bait cultivation pond, the population of copepod nauplius was ensured; the introduction of the white prawn and the second-year-old sword anchovy also made full use of the space of the bait cultivation pond, and tapped the production potential of the bait cultivation pond , improve the utilization efficiency of the water body, expand the production capacity of the water body, increase the output of the pond, and improve the economic benefits.

detailed description

Embodiment one: present embodiment comprises the equipment of bait cultivation pool, the inoculation and collection of copepods, and bait cultivation pond should have cement or film slope, and bottom quality is non-seepage muddy or silt quality, and water depth is 1 ～2m, the top is an artificially constructed steel wire plastic greenhouse, equipped with independent water inlet and drainage facilities and aerators; every year from December to January of the following year, 20ppm bleaching powder with water is used to disinfect the bait cultivation pond, and after 2 days, the bottom of the pond is pumped out The water is disinfected with 150kg/mu of quicklime dry pool, and after a week of exposure to the sun, enter the water. The water inlet is covered with a 60-mesh sieve. The water source is natural river water with a salinity of 1.2 to 2.0; Green, collect copepods from other ponds and inoculate them into the bait cultivation pond. The number of copepods in the bait cultivation pond is 0.5-1/ml; The stocking density of white shrimp is 3-6kg/mu, the stocking density of second-year-old sword anchovy is 300-500 tails/mu, and the prawn compound feed is fed once a day; Medium and large zooplankton ensure the population of copepod nauplii; when the water temperature rises above 15°C, a large number of copepod nauplii, a small amount of small protozoa and rotifers and other small Zooplankton, at this time, small zooplankton such as copepod nauplii, small protozoa and rotifers can be collected as the opening bait for the larvae of brown calamari.

Embodiment two: according to the mode described in embodiment one, on the 2nd day that the larvae of the brown calamari are hatched, part of the larvae of the brown calamari is ingested, and the bait of the larvae of the brown calamari that is collected is fed into the nursery pond, so that Copepod nauplii, small protozoa and rotifer microzooplankton in the nursery pond were kept at 5-8/ml, and the feeding was stopped at 10 days old. The results showed that the survival rate of 10-day-old brown calamari was 53.3 %.

Embodiment 3: According to the method described in Embodiment 1, the bait cultivation pond is close to the nursery field, with convenient transportation and sufficient water source. The pond is rectangular in shape with an area of 1900-4400m ² and equipped with two 1.5KW aerators.

Embodiment 4: According to the mode described in Embodiment 1, the method of collecting copepods from other ponds and inoculating them into the bait cultivation pond is to make a support frame in the pond, and use a submersible pump with a power of 2.2KW, a lift of 7m, and a diameter of 102mm. Place it horizontally underwater at a distance of 30-50cm from the water surface, connect the water outlet to a spiral steel wire hose with a diameter of 102mm, connect the hose to the tee, tie the two water outlets of the tee with a 60-mesh sieve, and start the submersible pump Run, collect the zooplankton (mainly copepods) in the 60 mesh sieve tulle, put into the bait cultivation pond.

Embodiment five: according to the mode described in embodiment one, the method for collecting the small zooplankton such as copepod nauplius, small protozoan and rotifer in the bait cultivation pond is to do bracing frame in the bait cultivation pond, and the power is A 2.2KW submersible pump with a head of 7m and a diameter of 102mm is placed horizontally underwater at a distance of 30-50cm from the water surface. The water outlet is connected to a spiral steel wire hose with a diameter of 102mm. At the two water outlets of the tee, filter with a 100-mesh sieve tulle to obtain copepod nauplii, small protozoa and rotifers small zooplankton as the opening bait for the larvae of the brown calamari scorpionfish, and pass through the 100-mesh sieve tulle of macrozooplankton returned to the pond.

Claims (5)

1. a biological breeding method for brown Chang prelarva open-mouthed bait, cultivates the outfit in pond, the inoculation of Copepods including bait And collection, it is characterized in that bait is cultivated pond and had cement or thin film side slope, substrate is non-leakage shale or argillo arenaceous, and the depth of water is 1 ～2m, top is artificial constructed steel wire plastics booth, is equipped with and independent enters pumping equipment and aerator；Annual Gregorian calendar December～ In January next year, cultivate pond with 20ppm bleaching powder band water sterilization bait, after 2 days, take out pond bottom water, then the calculogenesis with 150kg/ mu Ash carries out the sterilization of dry pond, intakes after being exposed to the sun one week, and muzzle 60 mesh sieve tulle of intaking, water source is natural river water, salinity 1.2～2.0； After bait cultivation pond intakes one week, water is yellow green, collects Copepods from other ponds and is inoculated into bait cultivation pond, and bait is trained Educate Copepods 0.5～1/ml in pond；Bait cultivate pond inoculation Copepods after, put in a suitable place to breed dusky white prawn and two age cutter long-tailed anchovy, spine end The breeding density of white shrimp is 3～6kg/ mus, two age cutter long-tailed anchovy breeding density be 300～500 tails/mu, 1 prawn of throwing something and feeding every day is joined Close feedstuff；When water temperature rises to more than 15 DEG C, bait is cultivated in pond there is a large amount of Copepods nauplius, a small amount of small-sized primary dynamic The microzooplankton such as thing and wheel animalcule, collects the microzooplanktons such as Copepods nauplius, small-sized protozoacide and wheel animalcule and makees Open-mouthed bait for brown Chang prelarva.

The biological breeding method of a kind of brown Chang prelarva open-mouthed bait the most according to claim 1, is characterized in that collecting To brown Chang prelarva open-mouthed bait throw something and feed in nursery pond, make the Copepods nauplius in nursery pond, small-sized protozoacide It is maintained at 5～8/ml with wheel animalcule microzooplankton.

The biological breeding method of a kind of brown Chang prelarva open-mouthed bait the most according to claim 1, is characterized in that bait is trained Educating pond, pond type rectangle, area is 1900～4400m², it is equipped with 2 1.5KW aerators.

The biological breeding method of a kind of brown Chang prelarva open-mouthed bait the most according to claim 1, is characterized in that from other Pond collect Copepods be inoculated into bait cultivate pond method be in pond, make bracing frame, by power be 2.2KW, lift be 7m, the immersible pump of bore 102mm lie in a horizontal plane in from the water surface 30～50cm under water, and outlet connects the spiral of bore 102mm Steel wire hose, connecting tee after hose, tie up to two water outlets of threeway with the bolting silk net of 60 mesh, start immersible pump fortune OK, collect the zooplankton in 60 mesh sieve tulles to put in bait cultivation pond.

The biological breeding method of a kind of brown Chang prelarva open-mouthed bait the most according to claim 1, is characterized in that bait is trained Educate that to collect the method for the microzooplanktons such as Copepods nauplius, small-sized protozoacide and wheel animalcule in pond be to cultivate pond at bait In make bracing frame, by power be 2.2KW, lift be 7m, the immersible pump of bore 102mm lies in a horizontal plane in from the water surface 30～50cm Under water, outlet connects the spiral wire hose of bore 102mm, connecting tee after hose, ties up to the bolting silk net of 130 mesh Two water outlets of threeway, then it is filtrated to get Copepods nauplius with 100 mesh sieve tulles, small-sized protozoacide and wheel animalcule are little Type zooplankton is as brown Chang prelarva open-mouthed bait.