CN203152251U

CN203152251U - Sand-diving test device for juvenile mollusks of mudflat mollusks

Info

Publication number: CN203152251U
Application number: CN2013201719802U
Authority: CN
Inventors: 唐保军; 尹飞; 姜朝军; 顾孝连
Original assignee: East China Sea Fishery Research Institute Chinese Academy of Fishery Sciences
Current assignee: East China Sea Fishery Research Institute Chinese Academy of Fishery Sciences
Priority date: 2013-04-08
Filing date: 2013-04-08
Publication date: 2013-08-28
Anticipated expiration: 2023-04-08

Abstract

The utility model relates to a sand-diving test device for juvenile mollusks of mudflat mollusks. The device comprises a sand tank, depth scale rulers and fine sand, wherein the sand tank is a rectangular container, and an opening is formed in the upper end of the container; the depth scale rulers are arranged on wide surfaces on the two sides of the sand tank; the sand tank is filled with the fine sand; and a top plane of the fine sand is flush with scales of the 0-points of the depth scale rulers. The sand-dwelling test device can measure the sand-diving capacity of the juvenile mollusks of different types and different sources in mudflat mollusks; the operation is simple; a transparent plastic sheet material and the depth scale rulers can measure sand-dwelling depths of the juvenile mollusks accurately and conveniently, so that selection of sources of healthy aquaculture spats is facilitated; at the same time, the sand-diving capacity of mollusks in different specifications can be measured, proper spat spreading time is determined, and the survival rate of the spats after spreading is improved; and the fine sand can be subdivided specifically according to particle sizes, so that influences of different bottom materials on the sand-diving capacity of different juvenile mollusks are measured, and the aquaculture varieties can be determined according to the types of the bottom materials of an aquaculture field.

Description

A kind of intertidal shellfish juvenile mollusk sand test device of diving

Technical field

The utility model belongs to intertidal shellfish cultural technique field, particularly relates to the latent sand test device of a kind of intertidal shellfish juvenile mollusk.

Background technology

The beach area of China has more than 900 ten thousand mu, owing to silt such as rises, encloses and cultivates at reason, and annual newly-increased nearly 20,000 square kilometres of beach area (Sun Jiaxia etc., 2012).Coastal beach is the good place of development intertidal shellfish breeding production.The intertidal shellfish kind that China is fit to breed is a lot, and what wherein economic worth was big, the breed prospect is good has 50 kinds approximately, and the cultural technique of a lot of kinds is comparative maturity, such as clam, the razor clam of hanging, Ruditapes philippinarum, mud blood clam, clam etc.Greatly develop shellfishery and not only can effectively develop the beach resource, also for farming, the fisherman changes the line of production, increase income an effective way is provided.

The main breeding way of current China intertidal shellfish comprises: raise together with in beach bottom sowing culture, seining cultivation, pond, put in a suitable place to breed in the salt pan etc.Culture used seed and mainly contain four kinds of acquisition approach such as wild seedling, semi, Tu Chi half artificial breeding, industrial artificial seedling rearing.The quality of seed and survival rate are to determine intertidal shellfish to culture key of success.Therefore, how selecting the good shellfish seed of vigor during breed, is the key factor that influences culture benefit.At present, mainly be to judge its vigor from the mobility of the outward appearance of shellfish seedling and foot etc.,, marginal growth trace as the shell look vivid obviously, size evenly, flexible active, the frightened back of foot closed shell time length etc.But the accuracy deficiency of these methods, because the general shell look of seed is vivider during water outlet just, and a lot of spat foot does not stretch out external.The intertidal shellfish of culturing all belongs to the imbedded and perched shellfish at present, and the life of dwelling is buried by the sand battalion that namely dives behind the abnormal one-tenth of its floating larva juvenile mollusk.The latent sand ability of the juvenile mollusk that vigor is more good is more strong.Simultaneously, the sand ability of diving also is one of key factor of determining the seed reproduction time, because the latent sand ability difference of different size seed, if submerged depth is not enough, juvenile mollusk might Yin Gaowen or cold and dead.Existing scholar is to long razor clam (Sun Hushan, 1992), quahog (Wang Guodong etc., 2008), stalwart blood clam (Zhou Wei etc., 2011) the latent sand ability of seed is studied, but all be that behavior, time equal angles from the sand of diving is described, and the dive degree of depth of sand, sand Design of device of diving etc. of shellfish juvenile mollusk are not appeared in the newspapers so far.

Summary of the invention

Technical problem to be solved in the utility model provides the latent sand test device of a kind of intertidal shellfish juvenile mollusk, to solve the problem that the judgement of shellfish juvenile mollusk vigor is inaccurate in the prior art, test operation is inconvenient.

The technical scheme that its technical problem that solves the utility model adopts is: a kind of intertidal shellfish juvenile mollusk sand test device of diving is provided, comprise sand launder, scale of depth and fine sand, described sand launder is rectangle upper end open container, the wide face in the both sides of described sand launder is carved with scale of depth, load fine sand in the described sand launder, described fine sand top planes is concordant with 0 of the scale of scale of depth.

Described sand launder is welded for the transparent PVC plastic plate.

0 of described scale of depth is engraved in downward 5cm place, top, arrives the bottom vertically downward, every 1cm one little lattice, every 5cm one big lattice.

Described fine sand is the sand grains of particle diameter in 0.05mm arrives the 1.0mm scope.

Beneficial effect

The utility model can be measured the latent sand ability of variety classes, separate sources intertidal shellfish juvenile mollusk, and is simple to operate, and transparent plastic sheet material and scale of depth can be measured the degree of depth of the latent sand of juvenile mollusk easily and accurately, thereby helps to select healthy breed to originate with seed; The utility model also can be measured the latent sand ability of different size shellfish, determines suitable seed reproduction time, improves the survival rate after seed is play; Fine sand in the utility model also can specifically segment according to particle diameter, thereby measures different substrates to the influence of the latent sand ability of different juvenile mollusks, helps to determine breed variety according to the substrate type of culturing the place.In addition, the utility model making preparation method is simple, and material price is cheap, and reusable.

Description of drawings

Fig. 1 is the utility model structural representation.

Embodiment

Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiment only are used for explanation the utility model and are not used in the scope of the present utility model that limits.Should be understood that in addition those skilled in the art can make various changes or modifications the utility model after the content of having read the utility model instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.

As shown in Figure 1, a kind of intertidal shellfish juvenile mollusk sand test device of diving, comprise sand launder 1, scale of depth 2 and fine sand 3, described sand launder 1 is rectangle upper end open container, the wide face in the both sides of described sand launder 1 is carved with scale of depth 2, filling fine sand 3 in the described sand launder 1, described fine sand 3 top planes are concordant with 0 of the scale of scale of depth 2.

Described sand launder 1 is welded for the transparent PVC plastic plate.

0 of described scale of depth 2 is engraved in downward 5cm place, top, arrives the bottom vertically downward, every 1cm one little lattice, every 5cm one big lattice.

Described fine sand 3 is the sand grains of particle diameter in 0.05mm arrives the 1.0mm scope.

Slip into the later behavior of layer of sand in order to observe juvenile mollusk, material adopts the transparent PVC plastic plate, and wall thickness 5mm is welded with the PVC welding rod after cutting, the long 45cm of its external dimensions specification, wide 4cm, high 30cm.Measure the latent sand degree of depth of juvenile mollusk for convenience, carve scale of depth 2 for wide in the both sides of sand launder 1, two ends in each side, each carves a vertical scale, and 0 of scale at the downward 5cm in sand launder top place, and scale unit is every lattice 1cm, carving straight line between two scales of 5cm connects, bottom to sand launder 1 is 25cm, and through inspection information, the latent sand degree of depth of intertidal shellfish generally is no more than 25cm.Testing used fine sand 3 particle size range is 0.1mm-0.5mm, before the use, with freshwater soaking, rinse well, dry after, put into sand launder 1, compacting, flat surface makes top planes concordant with 0 of the scale of scale of depth 2.During test, in sand launder, slowly add seawater, be higher than sand face 4cm to the water surface, it is long for the juvenile mollusk of 1-2cm is placed on the fine sand surface to get shell, from upper surface observe juvenile mollusk dive sand behavior and slip into the process of layer of sand, record the time of slipping into layer of sand, can observe the activity after juvenile mollusk slips into layer of sand from the sand launder side, to the sand that stops to dive, be the boundary with the upper casing edge of juvenile mollusk, measure the dive degree of depth of sand of juvenile mollusks by scale of depth 2.As required, the width of changeable sand launder, thereby the latent sand degree of depth of observation, the long juvenile mollusk of the different shells of mensuration.

Claims

1. the intertidal shellfish juvenile mollusk sand test device of diving, comprise sand launder (1), scale of depth (2) and fine sand (3), it is characterized in that, described sand launder (1) is rectangle upper end open container, the wide face in both sides of described sand launder (1) is carved with scale of depth (2), filling fine sand (3) in the described sand launder (1), described fine sand (3) top planes is concordant with 0 of the scale of scale of depth (2).

2. the latent sand test device of a kind of intertidal shellfish juvenile mollusk according to claim 1 is characterized in that described sand launder (1) is welded for the transparent PVC plastic plate.

3. the latent sand test device of a kind of intertidal shellfish juvenile mollusk according to claim 1 is characterized in that be engraved in downward 5cm place, top, arrives the bottom vertically downward at 0 of described scale of depth (2), every 1cm one little lattice, every 5cm one big lattice.

4. the latent sand test device of a kind of intertidal shellfish juvenile mollusk according to claim 1 is characterized in that, described fine sand (3) is the sand grains of particle diameter in 0.05mm arrives the 1.0mm scope.