CN1140171C

CN1140171C - Cultivating method for black sea bream fry and fingerling

Info

Publication number: CN1140171C
Application number: CNB011014199A
Authority: CN
Inventors: 汪首开
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-01-10
Filing date: 2001-01-10
Publication date: 2004-03-03
Anticipated expiration: 2021-01-10
Also published as: CN1364408A

Abstract

The present invention relates to sea water aquaculture fields, particularly to a cultivating method for black sea bream fry and fingerling. The method is divided into two stages of the generation and the cultivation of fry, and the cultivation and the growth of fingerling. The present invention is characterized in that the first generation of non-cultivating black sea bream parent fishes are firstly selected from coastal fishing, and the non-cultivating black sea bream parent fishes are moved to indoor sea water cement pools to be cultivated; the ratio of females to males is 1: 2, fish eggs generated by the parent fishes are incubated into primary incubation larva fishes in indoor net cages under the condition of artificial slow water flows, larva fish seeds are respectively arranged in the indoor sea water cement pool and an outdoor sea water earth pool to be cultivated. The method is also suitable for cultivating yellow croaker, growth conditions are easy to regulate, and the method has certain application value to sea water aquaculture industry.

Description

Black sea bream fry and fish fry breeding method

Technical field

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

Background technology

At present, supporting the black spiral shell fry majority grow is by fishing for naturally, and advantage is that the adaptability of fry growth is stronger.Weak point is to be difficult to guarantee can bring unnecessary loss and risk to the culturist for seedling quantity.

Summary of the invention

The objective of the invention is, provide black sea bream fry and fish fry breeding method to society.Make the stronger wild seedling of the black sea bream fry of cultivating growth in the seawater soil pond and fingerling and growth adaptability mutually growth conditions conform to.The fry of cultivating because of seawater Tu Chi is not subjected to the influence (irresistible disaster exception) of natural conditions, the area fixed output quota amount of looking its cultivation, can be more secure provide the fry and the fingerling of some to market.

Above-mentioned purpose is achieved in that it is divided into black sea bream fry and fish fry breeding method generation and cultivation, fish fry breeding and two stages of growth of fry.Phase I is that to select healthy and strong live fish in the black porgy fish of unartificial cultivation be parent population, and 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.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 or seawater cage culture.Profitable fruit

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 fishery resources, thereby improve the breed level of similar habit fish.

Embodiment

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 is put into peace and quiet indoor seawater fishpond in 1: 2 ratio, about 30 centimetres of the depth of water.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.Thereafter water level is increased to 1.5 meters, starts 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, throws in bait and is advisable with 8% one 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% one 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, and every is of a size of 80 * 35 * 40 centimetres, and every case is put about 150 milliliters of ovum.Adopt the hatching of net cage flowing 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, hatch water temperature 16-25 degree, generally become 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.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, and " left-falling stroke seedling " is exactly to lure newly hatched larvae to compile at a place with the method for illumination, is scooped into newly hatched larvae with water ladle again, and it is moved in the nursery pond.After putting Miao Ertian, begin to throw something and feed and cross the little individual wheel animalcule of carrying off 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, need soil pick-up every day once, change water 50% every other day, 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, can directly throw something and feed with 80 mesh sieve thin,tough silk.Feeding volume is advisable to eat up in 8 hours, replenishes fairy shrimp 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 is being put seedling first half of the month, carry out the work of the clear pond of sterilization, retaining to 80 centimetre then, every mu of Tu Chi executes 500 kilograms of chicken manure leachates, executed again once every three days, main purpose is to cultivate copepoda. every mu puts seedling density is 12 1 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, to in time replenish freezing copepoda, cultivate after ten days, throw 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 once utilizes the food platform to observe its situation of ingesting, and generally can see the minority fry 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.Observational technique is: can bait throwing in be seen the different location fish and also rob food after two hours, if also sporadicly robbing food, illustrates that bait throwing in is enough substantially.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, male and female parent population ratio is 1: 2, put in a suitable place to breed in indoor seawater pond and lay eggs → hatching of indoor seawater pond net cage flowing water, hatching water temperature 16-25 degree → incubation of membrane becomes newly hatched larvae → newly hatched larvae to cultivate at first to cultivate in the seawater cement pit for fry → fry, moves to the sterilization → seawater fingerling pond fish seedling cultivation of splashing behind the molten water of outdoor seawater Tu Chi cultivation → seawater fingerling pool quicklime again and is the growth of fingerling → fingerling → split seawater fish pond and seawater cage culture.