CN1364408A

CN1364408A - Cultivating method for black sea bream fry and fingerling

Info

Publication number: CN1364408A
Application number: CN01101419A
Authority: CN
Inventors: 汪首开
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-01-10
Filing date: 2001-01-10
Publication date: 2002-08-21
Anticipated expiration: 2021-01-10
Also published as: CN1140171C

Abstract

The present invention relates to sea fish cultivation. The cultivation process for black sea bream fry and breeding fish includes two stages of cultivating fry and growing breeding fish. The cultivation process includes the selection of the first generation of breeding fishes from the hooked fishes; cultivation of parent fishes in indoor cement pool containing sea water with male to female fish ratio being 1:2, hatching fish egg at artificial slow water flow condition inside indoor live box to obtain fry; and growing breeding fish in both indoor cement pool containing sea water and outdoor soil pool containing sea water. The said process is also suitable for yellow croaker and has easy-to-regulate growth condition.

Description

Black sea bream fry and fish fry breeding method

The present invention relates to the seawater aquaculture field, is a kind of breeding method of black sea bream fry and fingerling.

At present, supporting the black sea bream fry majority grow is by fishing for naturally, and advantage is that the fry adaptability of growing up is stronger, and weak point is to be difficult to guarantee confession seedling quantity, can bring unnecessary loss and risk to the culturist.

The objective of the invention is, provide black sea bream fry and fish fry breeding method, make black sea bream fry and the fingerling of cultivating growth in the seawater soil pond to society, consistent with the wild seedling that growth adaptability is stronger.And the fry that seawater Tu Chi cultivates is not subjected to the influence (irresistible disaster exception) of its natural conditions, and the area fixed output quota amount of looking its cultivation can provide the fry and the fingerling of some.

Above-mentioned purpose is achieved in that it is divided into black sea bream fry and fish fry breeding method generation and the cultivation of fry, fish fry breeding and two stages of growth, phase I is that to select healthy and strong live fish in the black porgy fish of non-artificial culture be parent population, raun in the parent population and milter ratio are 1: 2, move in the indoor seawater-culture pond, keep suitable temperature.The shading of black sunshade net is adopted in indoor top, and with blood clam meat, razor clam meat is main bait, and changes Chi Shui, increase oxygen in good time, puts in a suitable place to breed about 20 days and lays eggs, and membrane becomes newly hatched larvae, cultivates to be fry in 40 days again.Fry is cultivated through the seawater cement pit earlier, after seawater Tu Chi cultivates, moves in the seawater fingerling pool again and puts in a suitable place to breed.

Its advantage be fish-egg generation, hatch into prelarva, fry and the vegetative period of planting fish are easy to manual adjustment, make full use of the fishery resource, thereby improve the breed level of similar habit fish.

Now black porgy fish fry and fish fry breeding method and feature thereof are described as follows: black sea bream fry and fish fry breeding method are divided into generation and the cultivation of fry, fish fry breeding and two stages of growth, phase I is generation and the breeding method of fry, it is characterized in that fishing or fishing for that to select healthy and strong black porgy live fish in the sea area be parent population coastal, raun body weight 1500-3000 gram in the parent population, milter 500-700 gram, the complete gonad development of its body surface scale is better, the male and female parent population was in 1: 2 ratio, put into peace and quiet indoor seawater fishpond, about 30 centimetres of the depth of water, the potassium permanganate with 30PPM when putting into parent population soaked 30 minutes through fully stirring, and opened the valve draining thereafter, water be advance while arranging till no potassium permanganate look, then close draining valve, water level is increased to 1.5 meters, start the automatic aerator in the water.The shading of black sunshade net must be adopted in top, indoor seawater fishpond.With blood clam meat, razor clam meat is main bait, and the input bait is advisable with the 8%-9% of parent population body weight; Look residual bait amount during again according to artificial soil pick-up and how much regulate the input ratio, every day soil pick-up once, every day, total quantity of exchanged water reached 80%-100%.Put in a suitable place to breed in the seawater of parent population in the pond about 20 days, begin successively to lay eggs, egg-laying period reaches 20-25 days, collect ovum about 5 o'clock mornings of every day, with collect come-up fertilized egg metering after put into net cage, net cage is made by 80 order nylon bolting silks, every is of a size of 80 * 35 * 40 centimetres, every case is put about 150 milliliters of ovum, adopt the hatching of net cage miniflow water, hatch after 36 hours with the siphon filter and inhale useless seminal fluid and dead ovum and the foreign material that go at the bottom of the incubator box, hatching water temperature 16-25 degree generally becomes newly hatched larvae through 24-40 hour incubation of membrane.

The nurturing period of fry is 40 days, and in seawater cement pit cultivate earlier 20 days early stages, cultivates in seawater soil pond in back 20 days.Early stage, fry was that newly hatched larvae is cast aside in the nursery pond, every cubic metre of water body of breeding density 10,000 tails.Cast aside seedling a few days ago, 60 centimetres of nursery pond middle water levels are cultivated into chlorella and are become light green.After putting Miao Ertian, begin the little individual wheel animalcule of throwing something and feeding and filtering out with 120 mesh sieve thin,tough silk.Wheel animalcule density was controlled at about 10 of every milliliter of seedling waters in 24 hours, and the chlorella water colour in the seedling water kept light green in 20 days always, and carried out slight qi of chong channel ascending adversely.After cultivating the 4th day, the wheel animalcule of throwing something and feeding just needn't be filtered, and needs soil pick-up every day once, changes water 50% every other day, and qi of chong channel ascending adversely is big a little.Began the copepoda of throwing something and feeding and filtering out on the 13 day, after throwing something and feeding three days, also needn't refilter with 80 mesh sieve thin,tough silk.Can directly throw something and feed, feeding volume is advisable to eat up in 8 hours, replenishes worm half a year in right amount, and one day secondary of throwing something and feeding is cultivated to move to after 20 days in the outdoor seawater soil pond and cultivated.

Later stage seawater Tu Chi cultivates the method for fry: seawater Tu Chi carries out sterilization clear pond work putting seedling first half of the month, retaining to 80 centimetre then, and every mu of Tu Chi executes 500 kilograms of chicken manure leachates, executes once every three days again, and main purpose is to cultivate copepoda.Every mu puts seedling density is 12-15 ten thousand tails, observes the quantity of copepoda 3 o'clock later every afternoons, requires to reach 2 in 10 milliliters of water bodys, during lazy weight, in time replenish freezing copepoda, cultivates after ten days, throws a little eel bait again.Add 10 centimetres in water every day, as the compensation of native pond seepage and evaporation.Keep 1 meter depth of water always, meet in the big flood tide three days and to change water 50% every day.

Fish fry breeding: seedling was being put preceding ten days in the fingerling pool, executing behind 80 kilograms of molten water of quicklime the full pool for every mu splashes, water inlet is to 1 meter after three days, gate should be equipped with 40 order filtering mesh bag tubes during water inlet, be strictly on guard against that trash fish enters, fry moves into the fingerling pool gradually with drawing laws on arrests, and mu is put long 4 centimetres of left and right sides fry 4500 tails of body in a suitable place to breed.The every morning bait throwing in is once observed its situation of ingesting with the food platform, generally can see the fry decimal and mop and just be advisable.Bait is based on fresh shrimp, after culturing 20 days, and the whole piece small fish bait of can directly throwing something and feeding, bait throwing in quantity is decided according to the observation, and observational technique is: can bait throwing in be seen the different location fish and also rob food after two hours, if also rob food, illustrate that bait throwing in is enough substantially at other star.In addition, the also available method of fishing is observed, and bait throwing in is after two hours, and the 3-5 tail of fishing is looked its situation of ingesting.The bait kind was preferably changed a kind of every three days, this stage fingerling pool depth of water remains between the 1.8-2.2 rice.Every big flood tide changes water every day about 50% in three days.The growth of fingerling can split seawater fish pond and seawater cage culture.

Diseases prevention: during advanced fry, the nurture of fish fingerlings, when changing water, generally reached the full pool of the molten water of 32% bleaching powder with the 1PPM chlorinty and splash and prevent and treat disease every ten days.

This black sea bream fry and fish fry breeding method also are applicable to the cultivation of yellow croaker, and growth conditions is easy to regulate, and seawater is produced aquaculture certain using value.

Claims

1, black sea bream fry and fish fry breeding method, this method is divided into generation and the cultivation of fry, fish fry breeding and two stages of growth, the feature of its flow process is: the black porgy parent population that selects unartificial cultivation

Indoor seawater pond is put in a suitable place to breed and is laid eggs The net cage miniflow water hatching of indoor seawater pond

Incubation of membrane becomes newly hatched larvae Prelarva is cultivated and is fry

Fry is at first cultivated in the seawater cement pit and moves to outdoor seawater Tu Chi cultivation again

The sterilization of splashing behind the molten water of seawater fingerling pool quicklime

Seawater fingerling pond fish seedling is cultivated and is fingerling

The growth of fingerling

Split seawater fish pond and seawater cage culture.