CN102308769A - Exopalaemon modestus fry culturing method through combining net cage with aquarium - Google Patents

Abstract

The invention discloses an exopalaemon modestus fry culturing method through combining a net cage with an aquarium. The culturing method comprises the following steps of selection of a fry culturing aquarium and a net cage, fry culturing preparation, putting, incubation and management of ovigerous exopalaemon modestuses, exopalaemon modestus fry culturing and the like. The culturing method has the advantages of separating the exopalaemon modestus fries from the parent exopalaemon modestuses in time, avoiding the parent exopalaemon modestuses from swallowing the exopalaemon modestus fries, improving the high survival rate of the exopalaemon modestus fries, lowering the mutual slaughter rate among the exopalaemon modestus fries, being convenient for fry culturing management, being convenient for sampling and observation, and being less influenced by climatic change.

Description

The beautiful white shrimp seedling-cultivating method that a kind of net cage and aquarium combine

Technical field

The present invention relates to the beautiful white shrimp seedling-cultivating method that a kind of net cage and aquarium combine.

Background technology

Beautiful white shrimp ( Exopalaemon modestus) be under the jurisdiction of Crustachia, Decapoda, Palaemonidae, Palaemon, be distributed widely in China's freshwater lake and the river, be the shrimps sociales in many medium-and-large-sized lakes, area, the middle and lower reach of Yangtze River.Owing to reasons such as water pollution, overfishings, beautiful white shrimp presents individual miniaturization, output downward trend in the lake in recent years.Wild resource can not satisfy the growing market demand, and it is particularly important to solve artificial breeding and pond culture problem.White shrimp oogenesis quantity is wanted much less than freshwater shrimp.The absolute fish brood amount of Taihu Lake beautiful white shrimp shrimp with ovums colony is the 95-389 grain, on average is about 200, and less oogenesis amount dialogue shrimp is grown seedlings and proposed requirements at the higher level.The artificial raise seedling method of beautiful white shrimp commonly used has two kinds in recent years: indoor cement pit is grown seedlings or outdoor ponds is grown seedlings.These two kinds of seedling methods all are directly shrimp with ovums to be thrown in natural propagation in cement pit or native pond, treat to draw in the net after seed hatches transfer or former pond cultivation seed to becoming shrimp.These two kinds of artificial raise seedling methods have following deficiency: close shrimp and shrimp seedling are raised together with, the close shrimp shrimp seedling that is prone to eat, and the rate of growing seedlings is low; The shrimp seedling of different batches is raised together with, and the shrimp seedling is diversified in specifications, cuts one another's throats between the shrimp seedling; Can't grasp the shrimp seedling quantity of membrane, be difficult to control and cultivate density; Can't observe the growth of shrimp seed, the situation of ingesting easily.

Summary of the invention

The object of the invention is to provide to the defective of prior art the beautiful white shrimp seedling-cultivating method of a kind of net cage and aquarium combination.

The present invention adopts following technical scheme for realizing above-mentioned purpose:

The beautiful white shrimp seedling-cultivating method that a kind of net cage and aquarium combine is characterized in that may further comprise the steps:

(1) the grow seedlings selection of aquarium and net cage:

Aquarium is selected transparent bottom standoff cuboid glass aquarium, and box height is about 1.2m; Net cage is selected the cuboid net cage, and the net cage height is about 0.7m, and the net cage both sides are provided with hook, can the net cage cover be hung in the aquarium; The aquarium bottom is provided with the micropore oxygen-increasing device, selects many group Shui nationality side by side;

(2) preparation of growing seedlings:

Running water behind the abundant aeration is kept temperature behind 80 purpose nylon silk cover filterings be that 20-30 ℃, pH are prepared into the hatching water between 7.0-8.0; Inject above-mentioned hatching water to aquarium, the about 1m of the depth of water hitches said net cage in the said aquarium, and the net cage upper edge is concordant with the aquarium upper edge, makes the draft of net cage be about 0.5m;

(3) shrimp with ovums is put in a suitable place to breed, is hatched and manages:

To in the close shrimp of the bluish white shrimp breeding period of 5-6, select more than the long 35mm of body, athletic shrimp with ovums is put into the ready net cage of step (2), and each net cage is put the 400-500 tail in a suitable place to breed, opens oxygen-increasing device simultaneously; The shrimp with ovums feed of animal origin such as a small amount of flesh of fish, shrimp of during incubation throwing something and feeding, feeding volume is the 0.5%-1% of shrimp with ovums body weight, regularly throws something and feeds every day 1 time, the inspection situation of ingesting is in time removed residual bait and is adjusted next feeding volume after throwing something and feeding 1 hour; Spare no effort to look into and patrol, in time reject dead shrimp; Changed water once in per 12 hours, to change water about 1/3 at every turn, turns off oxygen-increasing device before changing water, is close to the water body of siphon bottom at the bottom of the case, then the fresh hatching water of replenish step (2) preparation;

(4) shrimp seed rearing:

Because the shrimp with ovums egg-laying time is different, the time that hatches fry is also different, and the 5-6 month is put the net cage of growing seedlings into to hatching the shrimp seedling from shrimp with ovums; Approximately need 6-13 days; From finding that first the shrimp seedling begins, the every separated net cage that will put shrimp with ovums in 2-3 days in a suitable place to breed is transferred in the new aquarium, with the density and the specification of control shrimp seedling; The shrimp seedling density that guarantees same aquarium is reasonable, and specification is roughly the same; Squab shrimp seedling total length is 4.2-5.5mm, vertically hangs upside down in water body, can put down trip after 4 days, and the fairy shrimp nauplius of throwing something and feeding this moment, changes pond culture at every day 1 time when shrimp seedling body length is grown to 1cm.

The present invention makes and selects net cage and aquarium to combine to cultivate beautiful white shrimp shrimp seedling, compared with prior art has following advantage:

The shrimp seedling of (1) hatching sees through mesh and gets into aquarium, and timely and close shrimp separates, and avoids the close shrimp shrimp seedling of eating, raising shrimp shoot survival percent;

(2) through mention net cage shift close shrimp control shrimp seedling batch, make the shrimp seedling specification basically identical of breeding, thereby reduce the rate of killing each other between the shrimp seedling;

(3) movable net cage is convenient to accomplish and is rejected dead shrimp, dead ovum and collect residual bait, helps seedling management.

(4) transparent aquarium is convenient to omnidistance growth, the situation of ingesting of observing seed, is convenient to sampling and observes its young morphological development variation, helps carrying out its fundamental biological knowledge research;

(5) indoor raising of seedling, growing seedlings to produce receives the influence of extraneous climatic variation little.

Embodiment

The beautiful white shrimp seedling-cultivating method that a kind of net cage and aquarium combine may further comprise the steps:

(1) the grow seedlings selection of aquarium and net cage:

Aquarium is selected transparent bottom standoff cuboid glass aquarium, and box height is about 1.2m; Net cage is selected the cuboid net cage, and the net cage height is about 0.7m, and the net cage both sides are provided with hook, can the net cage cover be hung in the aquarium; The aquarium bottom is provided with the micropore oxygen-increasing device, selects many group Shui nationality side by side;

(2) preparation of growing seedlings:

Running water behind the abundant aeration is kept temperature behind 80 purpose nylon silk cover filterings be that 20-30 ℃, pH are prepared into the hatching water between 7.0-8.0; Inject above-mentioned hatching water to aquarium, the about 1m of the depth of water hitches said net cage in the said aquarium, and the net cage upper edge is concordant with the aquarium upper edge, makes the draft of net cage be about 0.5m;

(3) shrimp with ovums is put in a suitable place to breed, is hatched and manages:

To in the close shrimp of the bluish white shrimp breeding period of 5-6, select more than the long 35mm of body, athletic shrimp with ovums is put into the ready net cage of step (2), and each net cage is put the 400-500 tail in a suitable place to breed, opens oxygen-increasing device simultaneously; The shrimp with ovums feed of animal origin such as a small amount of flesh of fish, shrimp of during incubation throwing something and feeding, feeding volume is the 0.5%-1% of shrimp with ovums body weight, regularly throws something and feeds every day 1 time, the inspection situation of ingesting is in time removed residual bait and is adjusted next feeding volume after throwing something and feeding 1 hour; Spare no effort to look into and patrol, in time reject dead shrimp; Changed water once in per 12 hours, to change water about 1/3 at every turn, turns off oxygen-increasing device before changing water, is close to the water body of siphon bottom at the bottom of the case, then the fresh hatching water of replenish step (2) preparation;

(4) shrimp seed rearing:

Because the shrimp with ovums egg-laying time is different, the time that hatches fry is also different, and the 5-6 month is put the net cage of growing seedlings into to hatching the shrimp seedling from shrimp with ovums; Approximately need 6-13 days; From finding that first the shrimp seedling begins, can optionally whenever transfer in the new aquarium, with the density and the specification of control shrimp seedling at a distance from the net cage that will put shrimp with ovums in 2-3 days in a suitable place to breed; The shrimp seedling density that guarantees same aquarium is reasonable, and specification is roughly the same; Squab shrimp seedling total length is 4.2-5.5mm, vertically hangs upside down in water body, can put down trip after 4 days, and the fairy shrimp nauplius of throwing something and feeding this moment, can change pond culture at every day 1 time when shrimp seedling body length is grown to 1cm.

Claims (1)

1. the beautiful white shrimp seedling-cultivating method that combines of net cage and aquarium is characterized in that may further comprise the steps:

(1) the grow seedlings selection of aquarium and net cage:

Aquarium is selected transparent bottom standoff cuboid glass aquarium, and box height is about 1.2m; Net cage is selected the cuboid net cage, and the net cage height is about 0.7m, and the net cage both sides are provided with hook, can the net cage cover be hung in the aquarium; The aquarium bottom is provided with the micropore oxygen-increasing device, selects many group Shui nationality side by side;

(2) preparation of growing seedlings:

Running water behind the abundant aeration is kept temperature behind 80 purpose nylon silk cover filterings be that 20-30 ℃, pH are prepared into the hatching water between 7.0-8.0; Inject above-mentioned hatching water to aquarium, the about 1m of the depth of water hitches said net cage in the said aquarium, and the net cage upper edge is concordant with the aquarium upper edge, makes the draft of net cage be about 0.5m;

(3) shrimp with ovums is put in a suitable place to breed, is hatched and manages:

To in the close shrimp of the bluish white shrimp breeding period of 5-6, select more than the long 35mm of body, athletic shrimp with ovums is put into the ready net cage of step (2), and each net cage is put the 400-500 tail in a suitable place to breed, opens oxygen-increasing device simultaneously; The shrimp with ovums feed of animal origin such as a small amount of flesh of fish, shrimp of during incubation throwing something and feeding, feeding volume is the 0.5%-1% of shrimp with ovums body weight, regularly throws something and feeds every day 1 time, the inspection situation of ingesting is in time removed residual bait and is adjusted next feeding volume after throwing something and feeding 1 hour; Spare no effort to look into and patrol, in time reject dead shrimp; Changed water once in per 12 hours, to change water about 1/3 at every turn, turns off oxygen-increasing device before changing water, is close to the water body of siphon bottom at the bottom of the case, then the fresh hatching water of replenish step (2) preparation;

(4) shrimp seed rearing:

Because the shrimp with ovums egg-laying time is different, the time that hatches fry is also different, and the 5-6 month is put the net cage of growing seedlings into to hatching the shrimp seedling from shrimp with ovums; Approximately need 6-13 days; From finding that first the shrimp seedling begins, the every separated net cage that will put shrimp with ovums in 2-3 days in a suitable place to breed is transferred in the new aquarium, with the density and the specification of control shrimp seedling; The shrimp seedling density that guarantees same aquarium is reasonable, and specification is roughly the same; Squab shrimp seedling total length is 4.2-5.5mm, vertically hangs upside down in water body, can put down trip after 4 days, and the fairy shrimp nauplius of throwing something and feeding this moment, changes pond culture at every day 1 time when shrimp seedling body length is grown to 1cm.