Method for increasing content of DHA in short-necked clams indoors

A technology of Philippine clam clam and clam clam, which is applied in fish farming, application, climate change adaptation and other directions, can solve the problems of high cost and insignificant nutritional enhancement effect, and achieves simple and easy application cost, increased edible value and health care. Value, the effect of increasing DHA content

Inactive Publication Date: 2014-10-29
DALIAN OCEAN UNIV +1
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  • Abstract
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Problems solved by technology

By feeding DHA-rich fish oil capsules or Isochrysis algae during indoor temporary breeding, it is possible to increase the DHA content in clams in a short period of ti...

Method used

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Examples

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Embodiment Construction

[0012] 1. Collect Philippine clams and transport them indoors at a rate of 40-50 kg / m 3 The density is temporarily raised in the cement pond. The size of Philippine clams is not limited, and individuals with a shell length of 1-5 cm are suitable for this method. Temporary water temperature is 16~20°C, salinity is 28~34‰, light is 2500~3000lx, room temperature is 15~18°C, and the air is continuously inflated; the bait for clams is marine Nannochloropsis with a density of 40 billion cells / g ( Nannochloropsis sp.) Algae extract, the feeding amount is 5 grams of algae extract / 1000 grams of clams / day, and the water in the whole pond is changed once a day. When casting bait, place Nannochloropsis algae cream in a 200-mesh nylon mesh belt, rub it slowly to make it fully dissolve in seawater, and then sprinkle it evenly in the whole pond.

[0013] 2. After 2-3 days of temporary breeding, the clams can be periodically dew-dried, and the baiting is started at 6-7 a.m. every d...

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Abstract

The invention discloses a method for increasing the content of DHA in short-necked clams indoors. The method includes the following steps that (1) the short-necked clams are collected, then moved into a room and temporally cultured in a pool according to the density of 40-50 kg/m<3>; (2) after the short-necked clams are temporally cultured for 2-3 days, periodic exposure and desiccation processing begins to be carried out on the short-necked clams for 30 days. Compared with the prior art, the method has the advantages of being easy to operate, saving time and labor, being low in cost and obviously increasing the DHA content.

Description

technical field [0001] The invention relates to a method for increasing the DHA content in the Philippine clam indoors. Background technique [0002] Philippine clam is currently an important species in shellfish farming, with an annual output of more than 3 million tons. Clams contain a variety of unsaturated fatty acids, among which DHA is the most important; at present, DHA content is an important standard to measure the nutritional value of Philippine clams. Due to the influence of food and environmental factors, the DHA content in the clams cultivated in coastal tidal flats and industrialized production is usually low, accounting for about 3% of the total fat content. By feeding DHA-rich fish oil capsules or Isochrysis algae during indoor temporary breeding, it is possible to increase the DHA content in clams in a short period of time (1 month), but the cost is relatively high and the effect of nutritional fortification is relatively high. Not obvious, usually only ca...

Claims

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Application Information

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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 殷旭旺陈鹏黄友谊刘钢闫喜武陈晓霞
Owner DALIAN OCEAN UNIV
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