CN1177526C

CN1177526C - Technique for breeding loach fry

Info

Publication number: CN1177526C
Application number: CNB021330085A
Authority: CN
Inventors: 艾景明; 臧福忱
Original assignee: Chenjia Township Acquatic Product Tech Popularizing Station Panshan County
Current assignee: Chenjia Township Acquatic Product Tech Popularizing Station Panshan County
Priority date: 2002-09-23
Filing date: 2002-09-23
Publication date: 2004-12-01
Anticipated expiration: 2022-09-23
Also published as: CN1401224A

Abstract

The present invention relates to a technique for artificially breeding loach fry in the aquaculture industry, which comprises a preparing stage, a hatching stage and a fry breeding stage, wherein the preparing stage comprises steps of selecting a place, planning for construction and building a soil spawning pond, a fry breeding pond and a soil bait breeding pond; in the hatching stage, two modes of both spawning and hatching in net cages, and spawning in the net cages and hatching in hatching barrels can be selected. In the fry breeding stage, work of sterilizing, fertilizing, bait throwing and water replenishing needs to be done as required. The scientific and reasonable technique easily operated has the advantages of good practicability, factory run, good quality and high survival rate of the bred fry, and can provide fry for large-scale breeding and obtain favorable economic benefit.

Description

A kind of breeding loach fry method

Technical field:

The present invention relates to a kind of aquatic products artificial raise seedling method that is used for culture fishery.

Background technology:

Along with the raising of living standards of urban and rural residents level, people also constantly increase the kind of aquatic products and demand, loach fish be exactly wherein quite the many trenchermans of audient like a kind of.Yet,, still lack mature technology so far because aquaculture at present is not enough to breeding loach fry research in the industry.At present, the subject matter that the loach fish seedling growing process exists is: the kind fish ovaries is grown inconsistent, and the same period, egg laying amount was on the low side, and then caused incubation rate on the low side; Bait cultivation peak and fry opening time are inconsistent; Spray to summer flower stage survival rate less than 30%, and be not suitable for factorial seedling growth.

Summary of the invention:

The object of the present invention is to provide and a kind ofly can effectively improve fry quality and phase survival rate, and can realize batch production production, the breeding loach fry method of seed is provided for large-scale farming.

Breeding loach fry method provided by the invention comprises preparation, hatching and seed rearing three phases, and implementation step and main points are as follows:

1, prepare: the screening place, native spawning pond is built in the planning construction, and seed rearing pond, native bait are cultivated the pond.Above-mentioned work can begin at the beginning of 4 months then, the place should be selected in the water source better, electric power, the unified comparatively easily fishing ground of traffic.Build 10 in native spawning pond and seed rearing pond, native bait is cultivated 5 in pond, cultivates the circular groove that pond, bait pond are dug dark 80cm, wide 100cm all around, and the seed rearing pond can hold 42m ³Water body, bait is cultivated the pond can hold 105m ³Water body, the hatching cage size of laying eggs is 3 * 1 * 0.5m, meter 1.5m ³Water body;

2, hatching.Incubation mode has two kinds, can choose one wantonly:

A, net cage is laid eggs, the net cage hatching, Tu Chi cultivates seed.In batches, grouping hastens parturition, planting fish body weight raun is 20-45g, milter 12-14g, the property ratio is 1: 1.5-1: 2; Afternoon every day is from ocyodinic of muscle of back injection, the every tail HCG400-600 of raun consumption international unit+LRH--A ₂0.5-1mg milter reduces by half, injection solvent 0.2ml/ tail, injection depth 0.2cm, water temperature 22--24 ℃; The back kind fish of hastening parturition is put into the net cage that is erected at spawning pond, and the capable palmae bark of 6-8 is laid in the net cage bottom, every line space 10cm, and the aftereffect of the hastening parturition time, the process of laying eggs needed 7-8 hour at 11-12 hour; To plant fish and catch out from net cage postpartum, the ovum grain that adheres on the palmae bark be moved on in another case hatch every 1m ³Water body is put 70000 in fish-egg, comes off to hatch at former net cage at the ovum grain of the case bottom of laying eggs;

B, net cage is laid eggs, the hatching pail hatching, Tu Chi cultivates seed.The process of hastening parturition is the same, and collect the ovum grain and put into hatching pail and hatch hatching pail volume 0.4m postpartum ³, every 1ml water is put 4 on ovum.

Above-mentioned two kinds of hatching patterns are emerged from ovum grain output to rupture of membranes needs 38-40 hour, and rupture of membranes needs 85 hours to the flat trip of fry;

3, seed rearing.Put into Tu Chi after the flat trip of fry or seed rearing is carried out in the rice field, the average every 1m of Tu Chi ²Put seedling 800 tails, seedling 20000 tails are put for every mu in the rice field; Putting seedling first half of the month uses the C5H6Br2N2O2 sterilization, and consumption is 2ppm, basal dressing in the circular groove after the dispenser, and every mu of 500kg, and introduce the every pond 5kg of pond sludge that has the wheel animalcule resting egg, inject the water that filters through 60 mesh sieve thin,tough silk then, mean depth of water 10cm; Splashed soya-bean milk once every day after fry went into the pond, and consumption is the each 1kg soya bean in every pond, and benefit was executed chicken manure once in per 7 days, and 50 kilograms in each every pond replenishes new water during water level depression, and it is fertile refreshing that water quality is remained; In the water of pond, produce the control of large-scale cladocera biochron employing chlorophos killing method, dosage 0.3ppm; When fry length arrives 2.5cm, throw something and feed soybean cake powder every day once, feeding volume is decided according to fry food amount, replenishes once new water weekly, each depth of water 10cm; Put into the loach fish of cultivating in the rice field and take specific process to culture, regulate water injection rate, keep field face water layer, rely on the natural bait in the natural water to satisfy ingesting of fry substantially according to rice field water situation; Nurturing period pond water ph value remains between the 7.6-7.8, and dissolved oxygen is more than 4mg/L.

Breeding loach fry methodological science provided by the invention is reasonable, easy to implement, and practicality is good, utilizes this method can realize batch production production, and for large-scale farming provides seed, and the fry quality of being cultivated is good, and the survival rate height can obtain good economic benefit.

Mid-May to mid-June is hastened parturition 12 batches by above-mentioned implementation step and requirement in certain experiment base, and 8782 groups of kind of the fishes of hastening parturition lay eggs 2,818 ten thousand, and average every group of fish lays eggs 3209, average fertilization rate 79%; Go out spray fry 8,000,000 tails altogether, average every group of kind fish produces seedling 911 tails, average incubation rate 36%; Tu Chi cultivates spray to the summer flower stage, reaches 60% through the measuring and calculating survival rate, produces 2-3cm Changyu seedling 1,300,000 tails, whenever all every 300m ²Produce seedling 14.5 ten thousand tails; To early August, seed size has reached 6-8cm, and this stage soil pond survival rate reaches 45%, and paddy field aquaculture spray fry to autumn sheet fingerling reaches 26% through multiple spot measuring and calculating survival rate, and autumn sheet fish 5200 tails are produced in every mu of rice field.

Claims

1, a kind of breeding loach fry method, this method comprises preparation, hatching and seed rearing three phases, implementation step and main points are as follows:

(1) prepare: the screening place, the planning construction is built native spawning pond, seed rearing pond and native bait and is cultivated the pond; Wherein, the seed rearing pond can hold water body 42m ³, bait is cultivated the pond can hold water body 105m ³, cultivate the circular groove that pond, bait pond are dug dark 80cm, wide 100cm all around, the incubator box specification of laying eggs is 3 * 1 * 0.5m, meter 1.5m ³Water body;

(2) hatching, can in following two kinds of incubation modes, choose one wantonly:

A, net cage is laid eggs, the net cage hatching, Tu Chi cultivates seed;

B, net cage is laid eggs, the hatching pail hatching, Tu Chi cultivates seed;

Its process and main points are: in batches, grouping hastens parturition, and injects ocyodinic every day one time, the back of hastening parturition is planted fish and is put into the net cage that is erected at spawning pond, and the bottom is laid 6～8 and gone palmae barks; To plant fish and pull out postpartum, the ovum grain that adheres on the palmae bark be moved on in another case or the hatching pail hatch, and come off to hatch at former net cage at the ovum grain of the case bottom of laying eggs;

(3) seed rearing: put into Tu Chi after the flat trip of fry or seed rearing is carried out in the rice field; Carry out sterilization on request respectively, put seedling, fertilising, water filling, feeding, the average every 1m of moisturizing work: Tu Chi ²Put seedling 800 tails, seedling 20000 tails are put for every mu in the rice field; Putting seedling first half of the month uses the C5H6Br2N2O2 sterilization, and consumption is 2ppm, basal dressing in the circular groove after the dispenser, and every mu of 500kg, and introduce the every pond 5kg of pond sludge that has the wheel animalcule resting egg, inject the water that filters through 60 mesh sieve thin,tough silk then, mean depth of water 10cm; Splashed soya-bean milk once every day after fry went into the pond, and consumption is the each 1kg soya bean in every pond, and benefit was executed chicken manure once in per 7 days, and 50 kilograms in each every pond replenishes new water during water level depression, and it is fertile refreshing that water quality is remained; In the water of pond, produce the control of large-scale cladocera biochron employing chlorophos killing method, dosage 0.3ppm; When fry length arrives 2.5cm, throw something and feed soybean cake powder every day once, feeding volume is decided according to fry food amount, replenishes once new water weekly, each depth of water 10cm; Put into the loach fish of cultivating in the rice field and take specific process to culture, regulate water injection rate, keep field face water layer, rely on the natural bait in the natural water to satisfy ingesting of fry substantially according to rice field water situation; Nurturing period pond water ph value remains between the 7.6-7.8, and dissolved oxygen is more than 4mg/L.