CN104488790B - Device for observing molt and growth of river crabs and application thereof - Google Patents
Device for observing molt and growth of river crabs and application thereof Download PDFInfo
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- CN104488790B CN104488790B CN201410817639.9A CN201410817639A CN104488790B CN 104488790 B CN104488790 B CN 104488790B CN 201410817639 A CN201410817639 A CN 201410817639A CN 104488790 B CN104488790 B CN 104488790B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
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Abstract
The invention discloses a device for observing molt and growth of river crabs. The device comprises a transparent cylinder body, an oxygen increasing machine, a heating rod fixed on the inner wall of the cylinder body and crab pots arranged inside the transparent cylinder body, wherein an air outlet head of the oxygen increasing machine is arranged inside the transparent cylinder body; each crab pot comprises a left transparent pipe, a right transparent pipe, a net cover and three or more annular net cover supporting brackets; the annular net cover supporting brackets are arranged at intervals inside the net cover; two ends of the net cover are connected with the left end of the left transparent pipe and the right end of the right transparent pipe respectively; the right end of the left transparent pipe is connected with the left end of the right transparent pipe in a dismountable manner. The device realizes tracing observation of river crabs. The invention further provides a method for measuring growth change before or after multiple times of molt of river crabs and a method for calculating the molt periodic time by adopting the device. The method realizes measurement of growth changes of weight, shell length, shell width and shell height before or after multiple times of molt of river crabs, and accurate statistics of the molt periodic time, and provides scientific basis for healthy river crab breeding.
Description
Technical field
The present invention relates to a kind of observe crab cast off a skin growth device and the application of this device.
Background technology
Cast off a skin and run through the whole life cycle of crab, from zoea to becoming Eriocheir sinensis to need through about 20 times cast off a skin.The growth of crab is to realize its staged to increase by casting off a skin, and each molting process is required for sloughing off old epidermis, synthesizes new epidermis, and Individual Size realizes a great-leap-forward growth with body weight within a short period of time simultaneously.Although crab casts off a skin, the generating process time is shorter, but determines the key of crab specification size and survival rate.In culture of Chinese mitten crab production process, owing to lacking suitable label, it is impossible to casting off a skin front and back to increase to change for crab individuality measured with the moulting cycle time.
Summary of the invention
The present invention provides a kind of and observes crab and cast off a skin the device of growth, it is simple to observe the tracking of crab.
To achieve these goals, the technical solution of the utility model be such that a kind of observe crab cast off a skin growth device, including transparent cylinder body, aerator, the heating rod being fixed on transparent inboard wall of cylinder block and the Eriocheir sinensis cage being arranged in transparent cylinder body, the head of giving vent to anger of described aerator is placed in transparent cylinder body, described crab pot includes left transparent tube, right transparent tube, net and ring-type net bracing frame, more than 3 ring-type net bracing frames it are arranged at intervals with in net, net two ends are connected with the left end of left transparent tube and right transparent tube right-hand member respectively, the right-hand member of left transparent tube is dismountable with the left end of right transparent tube to be connected.
Preferably, the right-hand member of left transparent tube is connected by clip with the left end of right transparent tube.
When water level is higher than crab pot height, preventing crab pot from sinking in transparent cylinder body, net middle part is additionally provided with foam ball float.
The also providing for of the present invention a kind of applies said apparatus to measure crab repeatedly to cast off a skin the method front and back increasing change, it is possible to realize being tracked crab observing, and measures crab and repeatedly casts off a skin the high growth change of before and after's weight, shell length, shell width and shell.
To achieve these goals, be employed technical scheme comprise that such, a kind of measure crab and repeatedly cast off a skin the method front and back increasing change, comprised the following steps:
1) selecting appendage to perfect, the crab that energy is strong is individual, measures and record every crab weight, shell length, shell width and shell high；
2) every crab and living body bait are placed individually in a crab pot, every crab pot is marked, then the crab pot of labelling is placed in transparent cylinder body, by heating rod control water temperature between 22 DEG C～28 DEG C, controls dissolved oxygen in water at 2mg/L～5mg/L by aerator；
3) every 4-12h observes crab once, and after crab casts off a skin, two to three days takes out crab from crab pot, after its weight, shell length, shell width and shell height are measured and recorded, places back in crab pot.
4) repeat step 3) until in crab pot crab individuality ripe or dead.
The present invention also provides for a kind of method applying said apparatus to measure the crab moulting cycle time, it is possible to realizes being tracked crab observing, counts the crab moulting cycle time accurately.
In order to realize this purpose, be employed technical scheme comprise that such, a kind of method measuring the crab moulting cycle time, comprise the following steps:
1) selecting appendage to perfect, the crab that energy is strong is individual；
2) every crab and living body bait are placed individually in a crab pot, every crab pot is marked, then the crab pot of labelling is placed in transparent cylinder body, by heating rod control water temperature between 22 DEG C～28 DEG C, controls dissolved oxygen in water at 2mg/L～5mg/L by aerator；
3) every 4-12h observes crab once, and record crab casts off a skin situation, according to data statistic analysis crab each moulting cycle time of record.
Beneficial effect:
1, apparatus of the present invention are by transparent cylinder body, aerator, heating rod and crab pot composition, aerator, it is required that heating rod makes the temperature of glass cylinder body and dissolved oxygen reach the growth of casting off a skin of crab, transparent cylinder body is equivalent to an independent ecosystem, one crab pot is a relatively independent single ecosphere, ring-type net bracing frame is set in the net of described crab pot, take Water space big, sturdy and durable, substantially big dead angle is not had in crab pot body, while limiting crab activity, growth of casting off a skin for crab provides a big activity space, its growth of casting off a skin is made not affected by crab pot, it is all visual additionally, due to transparent cylinder body and crab pot, thus it is observed that the growth conditions of casting off a skin of crab in crab pot, the tracking achieving cage one Eriocheir sinensis is observed；
2, each crab pot is marked by the present invention, then cultivate in every crab is placed individually into a crab pot, observe it is thus possible to conveniently realize the tracking to crab, measure crab repeatedly to cast off a skin before and after's weight, shell length, shell width and shell high growth change and moulting cycle time, further the changing factor affecting crab molt increment and moulting cycle time to be studied, provide scientific basis for crab healthy aquaculture.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of crab pot.
Detailed description of the invention
In order to deepen the understanding of the present invention, below in conjunction with embodiment, the invention will be further described, and these embodiments are only used for explaining the present invention, are not intended that limiting the scope of the present invention.
Embodiment 1
As depicted in figs. 1 and 2, a kind of observe crab cast off a skin growth device, including transparent cylinder body 1, aerator 2, the heating rod 3 being fixed on transparent inboard wall of cylinder block and the crab pot 4 being arranged in transparent cylinder body, giving vent to anger of described aerator 25 is placed in transparent cylinder body 1, described crab pot 4 includes left transparent tube 6, right transparent tube 7, net 8 and ring-type net bracing frame 9, more than 3 ring-type net bracing frames 9 it are arranged at intervals with in net 8, net 8 two ends are connected with left end and right transparent tube 7 right-hand member of left transparent tube 6 respectively, the right-hand member of left transparent tube 6 is dismountable with the left end of right transparent tube 7 to be connected, the right-hand member of the most left transparent tube 6 is connected by clip 10 with the left end of right transparent tube 7.
When water level is higher than crab pot height, preventing crab pot from sinking in transparent cylinder body 1, net 8 middle part is additionally provided with foam ball float 11.
During use, adding appropriate water by transparent cylinder body 1, put into by crab in crab pot 4, crab pot 4 is placed in transparent cylinder body 1, controls temperature respectively by heating rod 3 and aerator 2 and dissolved oxygen reaches crab and casts off a skin needed for growth.
Embodiment 2
A kind of measure crab and repeatedly cast off a skin the method front and back increasing change, comprise the following steps:
1) selecting appendage to perfect, the crab that energy is strong is individual, measures and record every crab weight, shell length, shell width and shell high；
2) every crab and living body bait are placed individually in a crab pot 4, every crab pot is marked, then the crab pot of labelling is placed in transparent cylinder body 1, controls water temperature between 22 DEG C～28 DEG C by heating rod 3, control dissolved oxygen in water at 2mg/L～5mg/L by aerator 2；
3) every 4-12h observes crab once, and after crab casts off a skin, two to three days takes out crab from crab pot 4, after its weight, shell length, shell width and shell height are measured and recorded, places back in crab pot.
4) repeat step 3) until in crab pot 4 crab individuality ripe or dead.
Embodiment 3
A kind of method measuring the crab moulting cycle time, comprises the following steps:
1) selecting appendage to perfect, the crab that energy is strong is individual；
2) every crab and living body bait are placed individually in a crab pot 4, every crab pot is marked, then the crab pot 4 of labelling is placed in transparent cylinder body 1, controls water temperature between 22 DEG C～28 DEG C by heating rod 3, control dissolved oxygen in water at 2mg/L～5mg/L by aerator 2；
3) every 4-12h observes crab once, and record crab casts off a skin situation, according to data statistic analysis crab each moulting cycle time of record.
Shell length in the present invention refers to body length, i.e. in the leading edge of the carapace back side recess of volume between cog to the length of carapace trailing edge ends；Shell width refers to the length of carapace the widest part；Shell height refers to the carapace back side to the vertical dimension of venter.Shell length, shell width and shell height slide gauge (0.02mm) is measured, and weight electronic balance (0.01g) weighs.The moulting cycle time of crab refers to the crab time between once casting off a skin and casting off a skin next time.
Above-described embodiment is only for technology design and the feature of the explanation present invention; its object is to allow person skilled in the art will appreciate that present disclosure and to implement according to this; can not limit the scope of the invention with this; all equivalence changes made according to spirit of the invention or modification, all should contain within protection scope of the present invention.
Claims (5)
1. one kind observe crab cast off a skin growth device, it is characterized in that, including transparent cylinder body (1), aerator (2), it is fixed on the heating rod on transparent inboard wall of cylinder block (3) and the crab pot (4) being arranged in transparent cylinder body, the head of giving vent to anger (5) of described aerator (2) is placed in transparent cylinder body (1), described crab pot (4) includes left transparent tube (6), right transparent tube (7), net (8) and ring-type net bracing frame (9), more than 3 ring-type net bracing frames (9) it are arranged at intervals with in net (8), net (8) two ends are connected with left end and right transparent tube (7) right-hand member of left transparent tube (6) respectively, the right-hand member of left transparent tube (6) is dismountable with the left end of right transparent tube (7) to be connected.
The most according to claim 1 a kind of observe crab and cast off a skin the device of growth, it is characterised in that the left end of the right-hand member of left transparent tube (6) and right transparent tube (7) passes through clip (10) and is connected.
The most according to claim 1 a kind of observe crab cast off a skin growth device, it is characterised in that net (8) middle part is additionally provided with foam ball float (11).
4. application measurement device crab described in claim 1-3 any claim repeatedly casts off a skin the method front and back increasing change, it is characterised in that comprise the following steps:
1) selecting appendage to perfect, the crab that energy is strong is individual, measures and record every crab weight, shell length, shell width and shell high；
2) every crab and living body bait are placed individually in a crab pot (4), every crab pot is marked, then the crab pot of labelling is placed in transparent cylinder body (1), by heating rod (3) control water temperature between 22 DEG C～28 DEG C, control dissolved oxygen in water at 2mg/L～5mg/L by aerator (2)；
3) every 4-12h observes crab once, and after crab casts off a skin, two to three days takes out crab from crab pot (4), after its weight, shell length, shell width and shell height are measured and recorded, places back in crab pot；
4) step 3 is repeated) until crab pot (4) interior crab individuality is ripe or dead.
5. the method for application measurement device crab moulting cycle described in claim 1-3 any claim, it is characterised in that comprise the following steps:
1) selecting appendage to perfect, the crab that energy is strong is individual；
2) every crab and living body bait are placed individually in a crab pot (4), every crab pot is marked, then the crab pot of labelling is placed in transparent cylinder body (1), by heating rod (3) control water temperature between 22 DEG C～28 DEG C, control dissolved oxygen in water at 2mg/L～5mg/L by aerator (2)；
3) every 4-12h observes crab once, and record crab casts off a skin situation, according to the data statistic analysis crab moulting cycle of record.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410817639.9A CN104488790B (en) | 2014-12-24 | 2014-12-24 | Device for observing molt and growth of river crabs and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410817639.9A CN104488790B (en) | 2014-12-24 | 2014-12-24 | Device for observing molt and growth of river crabs and application thereof |
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| Publication Number | Publication Date |
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| CN104488790A CN104488790A (en) | 2015-04-08 |
| CN104488790B true CN104488790B (en) | 2017-01-11 |
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| CN201410817639.9A Expired - Fee Related CN104488790B (en) | 2014-12-24 | 2014-12-24 | Device for observing molt and growth of river crabs and application thereof |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105145423B (en) * | 2015-07-31 | 2019-03-01 | 江苏省淡水水产研究所 | A kind of method in quick discrimination river crab difference husking period |
| CN110934099B (en) * | 2019-11-08 | 2021-09-24 | 上海海洋大学 | Method for inhibiting river crab fighting by DA receptor |
| CN113701590A (en) * | 2020-05-22 | 2021-11-26 | 江苏省淡水水产研究所 | Method for judging high-quality mature eriocheir sinensis |
Citations (4)
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| CN203167814U (en) * | 2013-03-26 | 2013-09-04 | 中国水产科学研究院东海水产研究所 | Device for observing zoeas of scylla paramamosain |
| CN103461233A (en) * | 2013-08-07 | 2013-12-25 | 上海海洋大学 | Stress resistance measuring device and use method thereof |
| CN103960187A (en) * | 2014-05-13 | 2014-08-06 | 王连成 | Method for breeding large river crabs and soft crabs in indoor circulating water in three-dimensional mode |
| CN204466602U (en) * | 2014-12-24 | 2015-07-15 | 江苏省淡水水产研究所 | A kind of observe river crab cast off a skin growth device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200924640A (en) * | 2007-12-06 | 2009-06-16 | jian-xun He | Ecological shell capable of providing house for hermit crab |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203167814U (en) * | 2013-03-26 | 2013-09-04 | 中国水产科学研究院东海水产研究所 | Device for observing zoeas of scylla paramamosain |
| CN103461233A (en) * | 2013-08-07 | 2013-12-25 | 上海海洋大学 | Stress resistance measuring device and use method thereof |
| CN103960187A (en) * | 2014-05-13 | 2014-08-06 | 王连成 | Method for breeding large river crabs and soft crabs in indoor circulating water in three-dimensional mode |
| CN204466602U (en) * | 2014-12-24 | 2015-07-15 | 江苏省淡水水产研究所 | A kind of observe river crab cast off a skin growth device |
Non-Patent Citations (1)
| Title |
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| 室内养殖条件下三疣梭子蟹的生殖蜕壳和交配行为;宣富君等;《动物学杂志》;20140820;第49卷(第4期);第579-586页 * |
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