CN101810147A

CN101810147A - Method for fattening portunids

Info

Publication number: CN101810147A
Application number: CN200910100887A
Authority: CN
Inventors: 郑根仕
Original assignee: SHENGSI COUNTY AQUATIC PRODUCTS CO Ltd
Current assignee: SHENGSI COUNTY AQUATIC PRODUCTS CO Ltd
Priority date: 2009-07-15
Filing date: 2009-07-15
Publication date: 2010-08-25

Abstract

The invention provides a method for fattening portunids. Captured portunids are selected to be fed in a pool by bait feeding, wherein the bottom of the pool is provided with a sand bed, and the water level in the pool is controlled to be 25-30 cm higher than the surface of the sand bed during bait feed and to be 0-2 cm higher than the surface of the sand bed during other time; the water temperature is controlled at 13-20 DEG C; and in the entire breeding period, fresh water products rich in astaxanthin are mainly used as the baits. By controlling the water temperature and the water level to reduce the energy loss of the portunids, and providing the portunids with rich nutrition by using nourishing shrimp heads and shrimp shells containing a large amount of astaxanthin as the main baits, the method for fattening portunids promotes the development speed of the portunids and brightens the color of the spermary. Compared with the prior art, the invention shortens the spermary formation time of the portunids by more than one month, the color of the spermary changes from orange into dark red, and the market price of the portunids is increased from half to almost the same as price of wild red-spermary crabs.

Description

Swimming crab educate the cream method

Technical field the present invention relates to be a kind of swimming crab educate the cream method, belong to technical field of aquaculture.

The background technology swimming crab is a kind of delicious meat, nutritious seawater biology, and its economic worth is higher, swimming crab is arranged usually, the icing bright swimming crab, frozen swimming crab of market sale.The cream of swimming crab is female crab fully-developed sexual gland, will form ovum as further growth.Because crab cream has very high nutritive value, and wine-colored cream also makes food add much beauty on dining table, so there have the economic worth of cream crab not have the cream crab to be much higher.Because the difference in maturing stage, so when catching, have or not the cream crab, the branch of cream crab is arranged.In order to improve the economic worth of swimming crab, people have carried out the cream of educating of swimming crab have been supported temporarily.The cream of educating of existing swimming crab is supported no special raising method temporarily, only carries out with the temporary foster identical method of swimming crab usually in the pond, promptly carries out bait throwing in then at Chi Dipu one deck sand, and the gonad maturity of no cream crab is become the cream crab.But the cream of the resulting cream crab of this raising method is orange, the delicious degree deficiency, and it is also longer to educate the cream time.

Summary of the invention is at the problems referred to above, technical problem to be solved by this invention be propose a kind of accelerate the swimming crab gonad maturity and make its cream lovely luster that generates swimming crab educate the cream method.

Swimming crab provided by the invention educate the cream method, be erbium to be thrown in the selected back of the swimming crab that catches raise in the pond, sand bed is arranged at bottom, said pond, and between feeding period, carry out water level, water temperature and nutritional control,

The control of said water level be only when bait throwing in control pond middle water level be the high water level that is higher than sand bed surface 25～30cm, all the other control pond middle water level is the low water level that is higher than sand bed surface 0～2cm times;

Said water temperature control is between whole feeding period, and water temperature is controlled at 13～20 ℃;

Said nutritional control is between whole feeding period, and institute's bait throwing in material mainly is the fresh water product that is rich in astaxanthin, as shrimp head, shrimp shell.

Swimming crab provided by the invention educate the cream method, the gentle water level of water is controlled the energy loss that reduces crab, and be that main bait makes the crab nutritional sufficiency with a shrimp shrimp shell nutritious and that contain a large amount of astaxanthins, make the lovely luster of the fast and cream of the gonad development speed of crab.Compared with prior art, the present invention makes swimming crab cream formation time shorten a wheat harvesting period, and the color and luster of cream is from the orange kermesinus that becomes, and commercially available price is from only bringing up to basic identical for half of wild red cream crab.

Said water temperature preferably is controlled at 15～18 ℃; Sooner or later each bait throwing in once, each institute bait throwing in material weight is 2～3% of crab body weight; And with lighting crab is pierced in the sand bed at night, generally all to allow crab be drilled in the sand bed except all the other times of taking food.

Clean the sandy of no mud with husky should getting in the said pond, be preferably yellow sand, black splotch and crab gill blackout are arranged and shale is arranged to prevent the crab belly; Cover helps forming microclimate with Chi Gai on the face of pond, makes crab living environment stable; When raising, also should often keep the Shamian Island cleaning, generally finish, remove residue on the sand bed face after water level is dropped to low water level, avoid residue polluted-water and sand bed in feed sooner or later.

Swimming crab provided by the invention educate the cream method, when the weather of the southeast～south～South-South west wind is arranged, stop bait throwing in, avoid not piercing in the sand bed after the crab feed.

Embodiment is following to further specify technical characterictic of the present invention with specific embodiment.

1, a swimming crab educate the cream method, its process is: 1. to catch swimming crab select, select the imperfect the wounded of diminishing of public crab and claw; 2. select swimming crab support in the pond; 3. crab advances and begins bait throwing in after the pond conformed through 1～2 day; 4. after 25 days, the definite crab cream in sampling observation back Cheng Houqi is caught.

Wherein before crab is supported the pond, be covered with the yellow sand of one deck 15cm at the bottom of the pond and the clean sea water that exceeds sand bed surface 25cm has been arranged.This seawater constitutes a circulatory system through water pipe and cooling device and filter, does not stop circulation in whole feeding process, and water temperature is controlled at 13～15 ℃.The pond has water level control apparatus, and water level is adjusted in and exceeds sand bed surface 25cm when bait throwing in, and water level was adjusted in and exceeds sand bed surface 1cm after the crab feed finished.After turning down, each water level chooses residue, if there is crab death also will in time take out.When not needing to operate into the pond, the very useful plastic greenhouse in pond covers.

Bait throw something and feed by sooner or later each once, each bait throwing in weight is that 3% of crab body weight is carried out, bait is also fed fresh small fish based on a fresh shrimp shrimp shell.

2, in the built-in pond of booth, shop cleaning yellow sand 20cm in the pond.The pond has water level to regulate the dewatering orifice of usefulness, and with the break-make of valve control dewatering orifice, high water level 50cm, low water level 20cm.Ceiling has illuminating lamp, and turn on light night.Feeding process is example as above, bait throw something and feed by sooner or later each once, each bait throwing in weight is that 2% of crab body weight is carried out, bait is also fed fresh small fish based on a fresh shrimp shrimp shell.Water temperature is controlled to be 16～18 ℃.

3, the same example, water temperature are controlled at 18～20 ℃.When the weather of the southeast～south～South-South west wind is arranged, stop bait throwing in, avoid not piercing in the sand bed after the crab feed.

Claims

A swimming crab educate the cream method, be erbium to be thrown in the selected back of the swimming crab that catches raise in the pond, sand bed is arranged at bottom, said pond, it is characterized in that carrying out between feeding period water level, water temperature and nutritional control,

The control of said water level be only when bait throwing in control pond middle water level be the high water level that is higher than sand bed surface 25～30cm, all the other control pond middle water level is the low water level that is higher than sand bed surface 0～2cm times;

Said water temperature control is between whole feeding period, and water temperature is controlled at 13～20 ℃;

Said nutritional control is between whole feeding period, and institute's bait throwing in material mainly is the fresh water product that is rich in astaxanthin, as shrimp head, shrimp shell.
Swimming crab as claimed in claim 1 educate the cream method, it is characterized in that said water temperature is controlled at 15～18 ℃.
Swimming crab as claimed in claim 1 educate the cream method, it is characterized in that each bait throwing in sooner or later once, each institute bait throwing in material weight is 2～3% of crab body weight.
Swimming crab as claimed in claim 3 educate the cream method, it is characterized in that finishing, remove residue on the sand bed face after water level is dropped to low water level in feed sooner or later.
Swimming crab as claimed in claim 1 educate the cream method, it is characterized in that in the said pond with sand it being the yellow sand of the no mud of cleaning.
Swimming crab as claimed in claim 1 educate the cream method, it is characterized in that being covered with Chi Gai on the face of said pond.
Swimming crab as claimed in claim 1 educate the cream method, it is characterized in that except all allowing crab be drilled in the sand bed in all the other times of eating time.
Swimming crab as claimed in claim 1 educate the cream method, it is characterized in that when the weather of the southeast～south～South-South west wind is arranged, stopping bait throwing in, avoid not piercing in the sand bed after the crab feed.