阅读说明：本技术 一种泥蚶肥满度育种值的测定方法 (Method for measuring tegillarca granosa fertility breeding value ) 是由 柴雪良 任鹏 何俊 李宗涵 于 2019-09-22 设计创作，主要内容包括：本发明公开了一种泥蚶肥满度育种值的测定方法,其技术方案要点包括如下步骤：步骤一,泥蚶称重；步骤二,天平去平；步骤三,浮力测算；步骤四,数据记录；步骤五,育种计算：通过物体在水中受到的浮力等于排出水的体积,即得到测定对象的体积V<Sub>n</Sub>＝V<Sub>排</Sub>＝F<Sub>n</Sub>/(ρ×g),再通过育种测算公式进行计算,泥蚶肥满度育种值等于(1.85-M<Sub>n</Sub>/V<Sub>n</Sub>)/0.4*100。本发明通过测量泥蚶的个体密度来间接反映其肥满度,并将个体密度转化为育种值,再通过育种值反映个体肥满度的性状,具有便于泥蚶性状选育工作的进行,在测定过程不会导致泥蚶死亡又能反映其肥满度的效果。(The invention discloses a method for measuring the fertility and breeding value of Scapharca granosa, which adopts the technical scheme that the method comprises the following steps: firstly, weighing blood clam; step two, leveling by a balance; thirdly, measuring and calculating buoyancy; step four, recording data; step five, breeding calculation: the volume V of the measured object is obtained by the buoyancy of the object in the water being equal to the volume of the discharged water n ＝V Row board ＝F n And/((rho multiplied g)), and then calculating by using a breeding calculation formula, wherein the tegillarca granosa fertility value is equal to (1.85-M) n /V n )/0.4*100. The method indirectly reflects the fullness of the tegillarca granosa by measuring the individual density of the tegillarca granosa, converts the individual density into the breeding value, and reflects the character of the individual fullness of the tegillarca granosa through the breeding value, so that the method has the effects of facilitating the performance of the character breeding of the tegillarca granosa, and not causing death of the tegillarca granosa in the measuring process but reflecting the fullness of the tegillarca granosa.)

1. A method for measuring the tegillarca granosa fertility value is characterized by comprising the following steps:

step one, weighing blood clam: the electronic balance (1) weighs the measured objects one by one to obtain the mass Mn of the measured objects and records the mass Mn one by one;

step two, leveling by a balance; firstly, placing a beaker (2) filled with water on an electronic balance (1), then soaking a hollow measuring container (3) in the beaker (2), connecting the upper end of the measuring container (3) with an iron stand (5) through a connecting rope (4), suspending the measuring container (3) in the water and not contacting with the inner wall of the beaker (2), and then leveling the electronic balance (1);

thirdly, measuring and calculating buoyancy; taking the measuring container (3) out of the beaker (2), then placing the measuring object in the measuring container (3), and placing the measuring container (3) in the beaker (2) again and immersing the measuring container in water, wherein the reading displayed on the electronic balance (1) is the buoyancy Fn of the measuring object;

step four, data recording: repeating the second step and the third step until the buoyancy Fn of all the test objects is recorded one by one;

step five, breeding calculation: and (3) obtaining the volume Vn of the measured object as V row Fn/(rho multiplied by g) by the buoyancy of the object in the water being equal to the volume of the discharged water, and calculating by a breeding calculation formula, wherein the tegillarca granosa fertility breeding value is equal to (1.85-Mn/Vn)/0.4 x 100, and the tegillarca granosa fertility breeding value is obtained.

2. The method for measuring the tegillarca granosa fertility value according to claim 1, wherein in the first step, the surface of the object to be measured is wiped by absorbent paper before being weighed, so as to remove excessive moisture on the surface of the object.

3. The method for measuring the tegillarca granosa fertility value according to claim 1, wherein in the first step, the surface of the object to be measured is dried by a dryer before being weighed, excess moisture on the surface of the object is removed, and the drying temperature of the dryer is not more than 30 ℃ in the drying process.

4. The method for measuring the tegillarca granosa fertility value according to claim 1, wherein in the second step, the volume of water in the beaker (2) is set to be 500ml and is pure water.

5. The method for determining the tegillarca granosa fertility value according to claim 1, wherein in the second step, the determination container (3) is arranged in a spherical structure, the determination container (3) comprises two semispherical shells (6) which are matched with each other, and the two semispherical shells (6) are arranged in a metal mesh structure.

6. The method for measuring the tegillarca granosa fertility value according to claim 5, wherein one end of each of the two half-spherical shells (6) is hinged with each other through a hinge (7), the other end of each of the two half-spherical shells is detachably connected with each other through a buckle, and the two half-spherical shells (6) are provided with a connecting clamping groove (8) and a connecting clamping block (9) which are matched with each other.

7. The method for measuring the tegillarca granosa fertility value according to claim 1, wherein in the second step, the depth of the lower end of the connecting rope (4) entering water is set to be 1cm, the connecting rope (4) is set to be a thin nylon rope, and the upper end and the lower end of the connecting rope (4) are fixedly connected with the iron support (5) and the measuring container (3) respectively in a binding mode.

8. The method for determining the tegillarca granosa fertility value according to claim 1, wherein in the fifth step, Fn is known from the data recorded in the fourth step, ρ is the density of water, g is 9.8m/s2, and Mn is known from the data recorded in the first step.

Technical Field

The invention relates to the technical field of aquaculture, in particular to a method for measuring the fertility and breeding value of Scapharca granosa.

Background

Arca granosa belongs to the phylum mollusca, class Dictyotaceae, order Ledara, genus Arca. Traditional shellfish culture in China. China is distributed in various places along the sea, and the spawning period of 8-10 months is the peak season of production. In addition, the artificial breeding is carried out in Hebei, Shandong, Zhejiang, Fujian and Guangdong, and the yield is quite high. The blood clam is delicious and can be eaten fresh or vinasse, and can be made into dry products, the blood clam is bright red, and the edge of the meat has a color line similar to a gold wire. Arca granosa belongs to the phylum mollusca, class Dictyotaceae, order Ledara, genus Arca. Traditional shellfish culture in China. The name of the place: blood clam, blood snail and tile ridge clam.

In the character breeding research of the blood clam, the proportion (fullness) of the edible part weight in the total weight is a very important economic character. However, direct measurement of the tegillarca granosa trait requires removal of the edible portion from the shell, which can result in death of the subject, after which the subject is no longer suitable for use in the breeding process for the trait.

Through measurement of a large number of samples, the proportion of the weight of the edible part in the total weight is smaller when the density value of the whole blood clam is higher. Therefore, a method which can not cause death of the blood clam and can reflect the fullness of the blood clam is provided.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a method for measuring the tegillarca granosa fertility value, which indirectly reflects the tegillarca fertility by measuring the individual density of the tegillarca granosa, converts the individual density into the fertility value, reflects the character of the individual tegillarca fertility by the fertility value, is convenient for the character breeding work of the tegillarca granosa, and has the effects of not causing death of the tegillarca in the measuring process and reflecting the tegillarca fertility.

In order to achieve the purpose, the invention provides the following technical scheme: a method for measuring the tegillarca granosa fertility value comprises the following steps:

step one, weighing blood clam: the electronic balance weighs the measured objects one by one to obtain the mass M of the measured objects_nAnd recording one by one;

step two, leveling by a balance; firstly, placing a beaker filled with water on an electronic balance, then soaking a hollow measuring container in the beaker, connecting the upper end of the measuring container with an iron support through a connecting rope, suspending the measuring container in the water and not contacting the inner wall of the beaker, and then leveling the electronic balance;

thirdly, measuring and calculating buoyancy; taking the measuring container out of the beaker, then placing the measuring object in the measuring container, and placing the measuring container in the beaker again and immersing the measuring container in water, wherein the reading displayed on the electronic balance is the buoyancy Fn of the measuring object;

step four, data recording: repeating the second step and the third step until the buoyancy F of all the test objects_nRecording is completed one by one;

step five, breeding calculation: the volume V of the measured object is obtained by the buoyancy of the object in the water being equal to the volume of the discharged water_n＝V_{Row board}＝F_nAnd/((rho multiplied g)), and then calculating by using a breeding calculation formula, wherein the tegillarca granosa fertility value is equal to (1.85-M)_n/V_n) 0.4 x 100, namely obtaining the fattening value of the tegillarca granosa.

The invention is further configured to: in the first step, the surface of the object to be measured is wiped through absorbent paper before being weighed, and redundant moisture on the body surface of the object to be measured is removed.

The invention is further configured to: in the first step, the surface of the measured object is dried by a dryer before being weighed, excess moisture on the body surface of the measured object is removed, and the drying temperature of the dryer is not more than 30 ℃ in the drying process.

The invention is further configured to: in step two, the volume of water in the beaker is set to 500ml and is pure water.

The invention is further configured to: in the second step, the measuring container is arranged in a spherical structure and comprises two matched hemispherical shells which are arranged in a metal net structure.

The invention is further configured to: the two half ball shells are hinged to each other through a hinge, the other ends of the two half ball shells are detachably connected with each other in a buckle mode, and the two half ball shells are provided with connecting clamping grooves and connecting clamping blocks which are matched with each other.

The invention is further configured to: in the second step, the depth of the lower end of the connecting rope entering water is set to be 1cm, the connecting rope is set to be a thin nylon rope, and the upper end and the lower end of the connecting rope are fixedly connected with the iron support and the measuring container respectively in a binding mode.

The invention is further configured to: in step five, F_nAs can be seen from the data recorded in step four, ρ is the density of water, g is 9.8M/s2, M_nAnd (4) knowing the data recorded in the step one.

In conclusion, the invention has the following beneficial effects:

the method has the advantages that the fat content of the blood clam is indirectly reflected by measuring the individual density of the blood clam, the individual density is converted into a breeding value, the character of the individual fat content is reflected by the breeding value, the character breeding work of the blood clam is facilitated, the death of the blood clam can not be caused in the measuring process, and the fat content can also be reflected.

Drawings

Fig. 1 is a process block diagram of a first embodiment of the invention.

Fig. 2 is a schematic structural diagram of a first embodiment of the present invention.

FIG. 3 is a schematic view showing the structure of the measuring vessel in FIG. 2.

Reference numerals: 1. an electronic balance; 2. a beaker; 3. a measuring container; 4. connecting ropes; 5. an iron stand; 6. a hemispherical shell; 7. a hinge; 8. a connecting clamping groove; 9. and connecting the clamping blocks.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.