CN103688886A - Method for ruditapes philippinarums aquiculture in shallow sea of subtidal zone - Google Patents

Abstract

The invention discloses a method for ruditapes philippinarums aquiculture in the shallow sea of a subtidal zone. The method comprises the following steps: before ruditapes philippinarums seedling sowing, removing harmful bionts from the shallow sea of the subtidal zone, which has the salinity of 25-32, has a non-polluted substrate and a flat terrain, does not have fresh water injection and serves as a bottom sowing aquiculture area; taking young shellfishes as aquiculture seedlings, wherein the specifications of the young shellfishes are that the lengths are 7-20mm, the density is 600-7000 pieces per 500 grams, the shell color is white, the specifications are uniform, the activity is high and the young shellfishes are not broken; in mid-to-late April, sowing the seedlings into a 10-meter isobath by a wet sowing method, and scattering the seedlings within the range of the aquiculture area in a concentrated manner according to the density of 3,000-5,000 pieces per square meter, wherein the seedling sowing operation is required to be executed at the time of slack water, the specification of the seedlings is equal to or larger than 7mm, and the harmful bionts are regularly removed from the aquiculture area in an aquiculture process; after half a year to two years of aquiculture, the ruditapes philippinarums can be harvested when the ruditapes philippinarums shellfishes grow to be equal to or longer than 4cm and are individually equal to or heavier than 8 grams.

Description

The Method of Cultivating Philippine Clams in Shallow Sea in Subtidal Zone

technical field

The invention relates to a method for cultivating Philippine clams, in particular to a method for cultivating Philippine clams in subtidal shallow seas.

Background technique

Philippine clams are the main marine shellfish in my country. The coastal areas of Zhuanghe and Pulandian in Liaoning are the main production areas and important export bases of Philippine clams in my country. The production form is tidal flat farming. However, in recent years, due to coastal engineering, environmental pollution and other reasons, the clam farming in the Philippines has shrunk in a large area, and the industrial development is facing difficulties. Therefore, if the culture of Philippine clams can be carried out in sea areas other than tidal flats, the problem of the reduction of the culture area caused by the above-mentioned reasons can be avoided, which is conducive to the continuation and expansion of the culture of Philippine clams.

Contents of the invention

The present invention aims to solve the above-mentioned shortcomings in the prior art, and proposes a method for cultivating Philippine clams in non-tidal areas, which can greatly expand the space for cultivating Philippine clams.

The technical solution of the present invention is: a kind of method for cultivating Philippine clam in subtidal zone shallow sea, it is characterized in that: described method is carried out according to the following steps:

a. Select the subtidal shallow sea area with a salinity of 25-32, no pollution to the bottom, flat terrain and no freshwater injection as the bottom sowing culture area, and remove the harmful organisms in the culture area before sowing seedlings,

b. Select the juvenile shellfish whose shell length is 7-20mm, 600-7000 grains/500g, white shell color, uniform size, strong vitality, and no damage as breeding seedlings.

c. In the middle and late April, use the wet sowing method to sow seedlings within the 10-meter isobath, and spread them at a density of 3000-5000 grains/ ^m2 in the breeding area, and the seedling operation should be selected in flat tide During the breeding process, the size of the seedlings should be above 7mm, and the breeding area should be regularly cleaned of harmful organisms during the breeding process.

d. After one and a half to two years of cultivation, clam shells grow to more than 4cm, and the individual body weight reaches more than 8g, that is, harvesting is carried out.

Compared with the prior art, the present invention has the following advantages:

The Philippine clam culture technology disclosed in the present invention is a major innovation to the Philippine clam culture technology, and it expands the water depth of Philippine clam culture to the subtidal zone 10-meter isobath shallow waters, increasing the culture space Dozens of times. Compared with tidal flat culture, shallow sea culture has the advantages of strong resistance to harsh environments, and is less affected by high temperature, freezing and rainfall; and because there is no open time in the subtidal zone, the effective feeding time is prolonged, and the growth rate and plumpness are large. The range is increased, and the breeding cycle is also greatly shortened accordingly. This technology is an important development of traditional farming theory and technology, and a major change in tidal flat shellfish farming. Therefore, it can be said that it has many advantages and is especially suitable for popularization and application in this field. Its market prospect is very broad .

Detailed ways

Specific embodiments of the present invention will be described below.

Bottom sowing culture area selection. The subtidal shallow sea area is selected as the bottom-seeding aquaculture area. The seawater quality must meet the aquaculture water standard, with a salinity of 25-32, no pollution to the bottom, flat terrain, and no freshwater injection. And before sowing seedlings, trapping, diving and harvesting by divers are used to remove harmful organisms.

Seed selection and transportation. Young shellfish with a shell length of 7-20 mm, 600-7000 grains/500 g, white shell color, uniform size, strong vitality, and no damage are selected as breeding seedlings. Seedlings are transported in containers with ice and refrigerated, and are protected from sun exposure, air drying and rain during transportation to maintain a humid environment, and they are harvested and transported on the same day to ensure the survival rate of seedlings.

Bottom sowing time, method, bottom sowing specification and density. In the middle and late April, the clam seedlings were sown within the 10-meter isobath using the wet sowing method, and the clam seedlings were transported by boat to the shallow sea area for breeding where the marks were inserted ^. The density should be sown intensively, and the seedlings should be sown at low tide, because clams need a certain time to dive after sowing, and the size of the selected seedlings must be above 7mm, otherwise the survival rate will be affected. Generally, three bottom sowing specifications are used: 7-10mm for small seedlings (5000-7000 grains/500g), 15mm for medium seedlings (1200-1500 grains/500g), and 20mm for large seedlings (600-700 grains/500g). The specifications are inversely proportional, so the bottom sowing density should be above 3000 grains/ ^m2 , combined with concentrated sowing.

Eliminate enemies. Before sowing and during the breeding process, it is necessary to remove harmful organisms in the breeding sea area, such as conch and starfish, etc. For these harmful organisms, trapping, diving and harvesting by divers are used to regularly remove the harmful organisms.

Capture. After one-and-a-half to two years of cultivation, clams can be harvested when their shell length reaches more than 4cm and their individual weight reaches more than 8g.

Utilize this method to carry out the cultivation of Philippine clams, and its cultivation water depth can reach within 10 meters of isobath, and through trial application, its average yield per mu is more than 1000kg, and the highest reaches 3500kg. Compared with surrounding tidal flat farming, the growth rate of Philippine clams has increased by 67.9%, the survival rate has increased by 50%, the fatness has increased by 26.9%, the breeding cycle has been shortened by more than 6 months, and the yield per mu has increased by more than 90%.

Claims (2)

1. a method for subtidal zone fish-farming in shallow marine water Ruditapes philippinarum, is characterized in that: described method is carried out according to following steps:

A, select salinity 25-32, substrate is pollution-free, physical features is smooth and the subtidal zone neritic area injected without fresh water as bottom sowing culture district, the removing of harmful organisms is carried out in culture zone before broadcasting seedling,

B, to select specification be the long 7-20mm of shell, 600-7000 grain/500g, shell look fair, specification is even, energetic, unabroken young shellfish is as cultivating seed,

C, in mid or late April, adopt and wetly to broadcast method broadcast seedling in 10 meters of isobaths, within the scope of culture zone according to 3000-5000 grain/m ²density concentrate and to sow, and broadcast when seedling operation should be chosen in slack tide and carry out, seed size is more than 7mm, and regularly the removing of harmful organisms is carried out in culture zone in breeding process,

D, through the cultivation of a year and a half to two year, more than japanese littleneck shell grows to 4cm, more than whose body weight reaches 8g, adopt collecting and obtain.

2. the method for subtidal zone fish-farming in shallow marine water Ruditapes philippinarum according to claim 1, is characterized in that: the removing of described harmful organisms adopts trapping or diver's diving to adopt the mode of catching.