CN105613353A

CN105613353A - Technology for breeding grouper fries

Info

Publication number: CN105613353A
Application number: CN201410595034.XA
Authority: CN
Inventors: 不公告发明人
Original assignee: Qingdao Xinyifa Industry and Trade Co Ltd
Current assignee: Qingdao Xinyifa Industry and Trade Co Ltd
Priority date: 2014-10-30
Filing date: 2014-10-30
Publication date: 2016-06-01

Abstract

The invention relates to a technology for breeding grouper fries. The technology specifically comprises the following steps: (1) setting breeding conditions: breeding the fries by commonly using a glass fiber reinforced plastic water tank, a cement pond or a net cage, wherein the container has the volume of 5 cubic meters to 50 cubic meters and the water depth of 1 meter to 2 meters, is circular or rectangular and is kept out of direct sunning, and the intensity of illumination is controlled to be 20,000lx to 30,000lx or below by window shades; (2) preparing appropriate feedstuff: feeding S-shaped rotifers at the density of 10 rotifers per milliliter several hours before the mouth opening of larva fishes, wherein during the feeding of animal plankton, a green water technology should be adopted, and single-celled algae is added into water; and (3) carrying out daily management: adopting still-water slightly-aerated breeding at the first 7 to 10 days of primary-stage breeding, wherein during still-water breeding, timed water changing should be carried out every day, and the volume of water changed is gradually increased from 1/4 to 1/2 of the volume of the fry breeding device. According to the technology disclosed by the invention, the breeding of the grouper fries is facilitated, the breeding effect is improved, the propagation and culture of groupers are facilitated, and the development of aquaculture is facilitated.

Description

A kind of Cultivating techniques of grouper fry

Technical field

The present invention relates to the Cultivating techniques of a kind of grouper fry, belong to fish culture technical field.

Background technology

Cabrilla, belongs to Perciformes, and body oblong is slightly flat-sided. Mouth is big, has supplemental maxillary, and tooth apicule, what have is expanded into canine tooth. Body by little ctenoid scale, have often be embedded in subcutaneous. Dorsal fin and buttocks fin spine are flourishing. Tail fin circle or spill. Variation in body color is a lot of, often brown or red, and has striped and speckle, for the big-and-middle-sized seafood fish of water warm.

Cabrilla is nutritious, and fine and tender taste is pure white, similar Carnis Gallus domesticus, have the title of " sea Carnis Gallus domesticus ". Cabrilla is again the first-class edible fish of a kind of low fat, high protein, is pushed away as one of Chinese four your name fishes by Hong Kong and Macao.

Summary of the invention

It is an object of the invention to provide the Cultivating techniques of a kind of grouper fry, in order to cultivate cultivation cabrilla better, it is achieved aquaculture.

To achieve these goals, technical scheme is as follows.

The Cultivating techniques of a kind of grouper fry, specifically includes:

(1) breeding condition is set: conventional fiberglass tank, cement pit or raising in cage fry. Volume 5 cubic metres��50 cubic metres, the depth of water 1 meter��2 meters, container is rounded or rectangle, it is to avoid direct sunlight, controls intensity of illumination at 20000lx��below 30000lx with window-blind. Suitable water temperature is 24 DEG C��28 DEG C, should prevent the drastic change of day and night water temperature. Nurturing an environment is quiet, and water quality is pure and fresh, miniflow water, it is preferred to continuing to supply filtered sea water, pH7.8��8.4, more than dissolved oxygen amount 5 mg/litre. Early stage cultivates fry, and small size pond puts Seedling 20,000 tails/cubic meter��100,000 tails/cubic meter, big water body 10,000 tails/cubic meter��30,000 tails/cubic meter, and the later stage cultivates density and should suitably reduce. Cultivate density during fry total length 10 millimeters and be not more than 10,000 tails/cubic meter, be 500 tails/cubic meter��1000 tail/cubic meter after more than 10 millimeters.

(2) prepare suitable bait: a few hours before prelarva opening, throw in S type wheel animalcule 10/milliliter. Epinephelus akaara hatches the prelarva of latter 4th day��8 days, and the food ration of wheel animalcule is increased with the enhancing of intensity of illumination after sunrise. But when peak of ingesting occurs in 13: 00��15: 00, intensity of illumination is 1200lx��2100lx, the per day amount of being satiated with food in this stage is 19.6��44.2 wheel animalcules, and per day food ration is 109.6��247.8 wheel animalcules. Raising 1,000,000 tail prelarvas, from opening to 8 ages in days, every day at least to supply 1 �� 10⁸��25 �� 10⁸Individual wheel animalcule. During above-mentioned zooplankton of throwing something and feeding, should adopting " clear water " technology, add Micro Algae in water body, density maintains 10 �� 10⁴��25 �� 10⁴Individual cells/ml, with reinforced cultivating, improves water quality and water ecological setting.

(3) daily management is carried out: the micro-inflation of employing hydrostatic in 7 days��10 days that early stage is cultivated is cultivated. When adding " clear water ", addition is unsuitable excessive, otherwise can cause the generation of prelarva gas bubble disease because algae reproduction is superfluous. The hydrostatic nurturing period, every day all should regularly change water, and quantity of exchanged water is the 1/4 of seed rearing device capacity and progressively increases to 1/2. Noting the clear end at ordinary times, every day, timing carried out. The prelarva that total length is more than 7 millimeters can occur to kill and devour mutually phenomenon, thus being substantially reduced seed rearing survival rate. In order to avoid killing and devouring mutually the generation of phenomenon, a series of cultural operations should be taked. First it is should carry out point pond by prelarva size to cultivate, every sorting in 5 days��7 days once; Next to that improve the frequency of bait throwing in, bait throwing in every day 4 times��5 times; 3rd is should rationally cultivate density, and about 10 millimeters of larvae cultivation density of total length are less than 10000 tails/cubic meter, and cultivating density when prelarva total length is more than 10 millimeters is 500 tails/cubic meter��1000 tail/cubic meter; 4th is arrange shelter in water body, kills and devour mutually as bottom input plastic tube etc. can reduce. Additionally, also according to feature reasonable arrangements such as their early life history, distribution water layer, growth and feeding habits, should deal carefully with in grouper fry cultivating and managing. Young stage transfers the end to and dwells life, it sometimes appear that the phenomenon of colony's concentrations, should keep running water technology, regulate water temperature, it is possible to prevent the generation of above-mentioned phenomenon.

This beneficial effect of the invention is in that: this inventive technique is easy to cultivate for cabrilla nursery, improves cultivation effect, contributes to breeding and the cultivation of cabrilla, it is simple to carry out aquaculture.

Detailed description of the invention

Below in conjunction with embodiment, the specific embodiment of the present invention is described, in order to be better understood from the present invention.

Embodiment

The Cultivating techniques of the grouper fry in the present embodiment, specifically includes:

(1) arranging breeding condition: adopt cement pit or raising in cage fry, volume 50 cubic metres, the depth of water 2 meters, container is rounded or rectangle, it is to avoid direct sunlight, controls intensity of illumination at 20000lx with window-blind. Suitable water temperature is 24 DEG C��28 DEG C, should prevent the drastic change of day and night water temperature. Nurturing an environment is quiet, and water quality is pure and fresh, miniflow water, it is preferred to continuing to supply filtered sea water, pH7.8��8.4, more than dissolved oxygen amount 5 mg/litre.

Early stage cultivates fry, big water body 10,000 tails/cubic meter��30,000 tails/cubic meter, and the later stage cultivates density and should suitably reduce. Cultivate density during fry total length 10 millimeters and be not more than 10,000 tails/cubic meter, be 500 tails/cubic meter��1000 tail/cubic meter after more than 10 millimeters.

(3) daily management is carried out: the micro-inflation of employing hydrostatic in 7 days��10 days that early stage is cultivated is cultivated. The hydrostatic nurturing period, every day all should regularly change water, and quantity of exchanged water is the 1/4 of seed rearing device capacity and progressively increases to 1/2. Noting the clear end at ordinary times, every day, timing carried out. In order to avoid killing and devouring mutually the generation of phenomenon, a series of cultural operations should be taked. First it is should carry out point pond by prelarva size to cultivate, every sorting in 5 days��7 days once; Next to that improve the frequency of bait throwing in, bait throwing in every day 4 times��5 times; 3rd is should rationally cultivate density, and about 10 millimeters of larvae cultivation density of total length are less than 10000 tails/cubic meter, and cultivating density when prelarva total length is more than 10 millimeters is 500 tails/cubic meter��1000 tail/cubic meter; 4th is arrange shelter in water body, kills and devour mutually as bottom input plastic tube etc. can reduce. Additionally, also according to feature reasonable arrangements such as their early life history, distribution water layer, growth and feeding habits, should deal carefully with in grouper fry cultivating and managing.

The above is the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the principles of the invention; can also making some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.

Claims

1. the Cultivating techniques of a grouper fry, it is characterised in that: specifically include:

(1) breeding condition is set: adopt fiberglass tank, cement pit or raising in cage fry, volume 5 cubic metres��50 cubic metres, the depth of water 1 meter��2 meters, container is rounded or rectangle, controls intensity of illumination at 20000lx��below 30000lx with window-blind; Water temperature is 24 DEG C��28 DEG C; PH7.8��8.4, more than dissolved oxygen amount 5 mg/litre; Early stage cultivates fry, and small size pond puts Seedling 20,000 tails/cubic meter��100,000 tails/cubic meter, big water body 10,000 tails/cubic meter��30,000 tails/cubic meter, and the later stage cultivates density and should suitably reduce; Cultivate density during fry total length 10 millimeters and be not more than 10,000 tails/cubic meter, be 500 tails/cubic meter��1000 tail/cubic meter after more than 10 millimeters;

(2) prepare suitable bait: a few hours before prelarva opening, throw in S type wheel animalcule 10/milliliter; Raising 1,000,000 tail prelarvas, from opening to 8 ages in days, every day at least to supply 1 �� 10⁸��25 �� 10⁸Individual wheel animalcule; During above-mentioned zooplankton of throwing something and feeding, should adopting " clear water " technology, add Micro Algae in water body, density maintains 10 �� 10⁴��25 �� 10⁴Individual cells/ml;

(3) daily management is carried out: the micro-inflation of employing hydrostatic in 7 days��10 days that early stage is cultivated is cultivated; When adding " clear water ", addition is unsuitable excessive; The hydrostatic nurturing period, every day all should regularly change water, and quantity of exchanged water is the 1/4 of seed rearing device capacity and progressively increases to 1/2; Noting the clear end at ordinary times, every day, timing carried out; The prelarva that total length is more than 7 millimeters can occur to kill and devour mutually phenomenon, in order to avoid killing and devouring mutually the generation of phenomenon, should take a series of cultural operations: is first should carry out point pond by prelarva size to cultivate, every sorting in 5 days��7 days once; Next to that improve the frequency of bait throwing in, bait throwing in every day 4 times��5 times; 3rd is should rationally cultivate density, and about 10 millimeters of larvae cultivation density of total length are less than 10000 tails/cubic meter, and cultivating density when prelarva total length is more than 10 millimeters is 500 tails/cubic meter��1000 tail/cubic meter; 4th is arrange shelter in water body, kills and devour mutually as bottom input plastic tube etc. can reduce; Grouper fry cultivating and managing also according to feature reasonable arrangements such as their early life history, distribution water layer, growth and feeding habits, should be dealt carefully with.