CN104335939A - Method for setting artificial fish nest to recover fish resources in Songhua river and evaluation method of effect of setting artificial fish nest to recover fish resources in Songhua river - Google Patents
Method for setting artificial fish nest to recover fish resources in Songhua river and evaluation method of effect of setting artificial fish nest to recover fish resources in Songhua river Download PDFInfo
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Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/70—Artificial fishing banks or reefs
-
- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16Z—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS, NOT OTHERWISE PROVIDED FOR
- G16Z99/00—Subject matter not provided for in other main groups of this subclass
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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
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/22—Improving land use; Improving water use or availability; Controlling erosion
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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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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Marine Sciences & Fisheries (AREA)
- Zoology (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Farming Of Fish And Shellfish (AREA)
Abstract
The invention relates to a method for setting an artificial fish nest to recover fish resources in the Songhua river and an evaluation method of an effect of setting the artificial fish nest to recover the fish resources in the Songhua river, and solves the problems of fish resource degeneration and fish species diversity decline of existing Songhua river. The method comprises the following steps: 1, selecting a target region; 2, selecting fish nest materials; 3, providing a fish nest setting method; 4, hatching fish eggs; 5, releasing fish fries. The method is applied to the technical field of ecological restoration of wetland.
Description
Technical field
The present invention relates to a kind of artificial fish nest that arranges and recover the method for Fishes In Songhua River resource and the evaluation method of effect thereof.
Background technology
Song Hua River is one of China's " seven large rivers ", one of the fresh water fishery base that Ye Shi the Northeast is important and bio-diversity sensitive region.According to made, before 20 century 70s, only the fish kind number in downstream, Song Hua River just reaches 78 kinds, and the average annual amount of fishing of economic fish accounts for more than 70% of whole Songhua River Basin gross annual output amount, the average 30 ~ 40kg/ of single ship fishery output (day ship).River, downstream section is mainly originated from famous Song Hua River " three spend five sieve ", bream flower (bream) wherein, huge legendary turtle flower (mandarin fish), lucky flower (flower
) in catches, account for 1% ~ 2%.
Since the eighties, along with developing rapidly of industrial and agricultural production, Song Hua River water pollution is completely aggravated gradually, indivedual rivers section levels of toxic substances exceeds standard, direct lethal fish, a large amount of oxygen consumption organics is degraded the dissolved oxygen consumed excessively in river, causes fish hypoxia death.Meanwhile, riverine wetland is also destroyed, and cause fish food chain interruption, spawning ground degeneration or disappear, the natural propagation of fish is damaged, and kind and quantity are all in minimizing.Investigation result to downstream, Song Hua River stock of fish display in 2012 ~ 2013 years, the fish collecting sample have 48 kinds, the occasional species that bream flower, huge legendary turtle flower, lucky flower have become in catches, can not form fishery production; Single ship fishery output average out to 5.97 ~ 10.48kg/ (day ship), the kind of fish and quantity all obviously reduced in the past compared with 20 century 70s.
The kind of fish and the minimizing of quantity, also directly have influence on the existence that those take fish as the birds of Major Foods, the degeneration of fish and Bird Resource and the decline of species diversity, be the impaired mark of the raw ecosystem degradation of Song Hua River Downstream Wetland and integrality, and to recover fish and Bird Resource and species diversity thereof be the important embodiment that this local ecosystem integrality is recovered.Therefore, the recovery of the stock of fish and species diversity thereof is prerequisite and the basis of recovering Song Hua River Downstream Wetland ecosystem integrity, also significant to the recovery of whole Songhua River Basin wetlands ecosystems.
Summary of the invention
The present invention is the problem that will solve existing Fishes In Songhua River Resource Degradation, Fish Species Diversity decline, and provides a kind of artificial fish nest that arranges to recover the method for Fishes In Songhua River resource and the evaluation method of effect thereof.
A kind of method arranging artificial fish nest recovery Fishes In Songhua River resource of the present invention is carried out according to the following steps:
One, arrange bamboo bar: bamboo bar that a length is 2.5m ~ 3.0m is inserted and the length that the end of bamboo bar inserts bed mud is 50cm ~ 80cm every 1.5m in the appropriate location in target area, surface 1m ~ 1.5m for the top of bamboo bar; Then at 20cm ~ 30cm place, underwater, employing diameter is that bamboo bar is concatenated by the iron wire line of 1mm ~ 1.5mm; Be arranged in a linear by bamboo bar, each row volume is 1 group, be arranged 1 group in parallel every 5m, often organizes length 150m ~ 200m; Described target area is the native species spawning ground of river waters; Described appropriate location is that mean depth of water is the region of 0.5m ~ 1.5m apart from bank 10m ~ 50m;
Two, fish nest is set: arrange fish nest in due course, two kinds of modes can be divided into 1. herbaceous stem fish nest material, root matter fish nest material or net matter fish nest material be tied up bunchy and be fish nest, then with cotton thread, fish nest is fixed on iron wire line, adjacent two fish nest interval 20cm; 2. branch matter fish nest material oblique cutting is entered in bed mud, be 60 ° of angles with bed mud upper surface, namely each root branch matter fish nest material becomes 1 fish nest, the oblique cutting that is linearly parallel to each other by fish nest to enter in bed mud underwater 5cm ~ 10cm and fish nest submerges, adjacent two fish nest interval 30cm, every 100 volumes are 1 group, be arranged 1 group in parallel every 10m; Described appropriate time is when before native species spawning period, 1d ~ 2d is to phytal zone, the bank migration in spawning ground; Described herbaceous stem fish nest is a kind of or wherein several mixture in the reed of rivers bank, sheep's hay and weeds; Described matter fish nest is one or both the mixture in the littoral willow coring washed away by " peach blossom water " of rivers and poplar root palpus; Described branch matter fish nest is one or both the mixture in the willow branch of rivers bank and branch of poplar; Described net matter fish nest is a kind of or wherein several mixture in polyethylene mesh sheet, netting twine and nettle discarded in the littoral fishing of rivers;
Three, hatch fish roe: the suitable pool in the target area described in step one be arranged in parallel 2 ~ 3 row net cages, each arranges 5 ~ 10 net cages, and cage size is 5m × 6m × 2m, and mesh specification is 60 orders/cm
2, each spacing of arranging two adjacent net cages is 2m, and the spacing of adjacent two row's net cages is 5m; Then. the fish nest that the step 2 of adhering to fish-egg is arranged is collected, after drug disinfection, puts into net cage concentrate hatching; During hatch fish roe, every day drug disinfection 1 time; Described suitable pool is that the water flows gently, the leeward region on the sunny side of mean depth of water 1.5m ~ 2m;
Four, fry is released: treat the fry hatched in step 3 net cage, after artificial culture becomes juvenile fish, then frees in river waters, completes and arranges artificial fish nest recovery Fishes In Songhua River resource.
A kind of evaluation method arranging artificial fish nest recovery Fishes In Songhua River resource impact is undertaken by following steps: between the fish egg-laying period, in target area, randomly draw each 3 groups of the fish nest of the fish nest of herbaceous stem fish nest material, the fish nest of root matter fish nest material, the fish nest of net matter fish nest material and branch matter fish nest material, often organize 3 fish nests; Group fish nest of is wherein brought back the attached ovum number of indoor statistics; Group fish nest of is wherein put into 3m × 4m × 1.5m, 60 orders/cm
2net cage in hatch, statistics fry hatch number; It is 100m that last group fish nest is put into area
2little pond in hatch, and by the fry rearing that hatches to the juvenile fish of 2cm ~ 3cm, then differentiate the kind of fish, add up the quantity of various fish, namely complete and the evaluation method that artificial fish nest recovers River Fish resource impact is set; Described target area is the native species spawning ground of river waters; Described herbaceous stem fish nest is a kind of or wherein several mixture in the reed of rivers bank, sheep's hay and weeds; Described matter fish nest is one or both the mixture in the littoral willow coring washed away by " peach blossom water " of rivers and poplar root palpus; Described branch matter fish nest is one or both the mixture in the willow branch of rivers bank and branch of poplar; Described net matter fish nest is a kind of or wherein several mixture in polyethylene mesh sheet, netting twine and nettle discarded in the littoral fishing of rivers.
Beneficial effect of the present invention:
The present invention adopts nontoxic, durable, bond area fish nest material that is large and that originate wide manually to arrange fish nest, fish-egg after fertilization can be sticked on it, be convenient to hatching.The ecological balance in this waters can not be affected because of introducing external fingerling simultaneously, effectively can promote the recovery of River Fish resource.
Embodiment
Embodiment one: a kind of method arranging artificial fish nest recovery Fishes In Songhua River resource of present embodiment is carried out according to the following steps:
One, arrange bamboo bar: bamboo bar that a length is 2.5m ~ 3.0m is inserted and the length that the end of bamboo bar inserts bed mud is 50cm ~ 80cm every 1.5m in the appropriate location in target area, surface 1m ~ 1.5m for the top of bamboo bar; Then at 20cm ~ 30cm place, underwater, employing diameter is that bamboo bar is concatenated by the iron wire line of 1mm ~ 1.5mm; Be arranged in a linear by bamboo bar, each row volume is 1 group, be arranged 1 group in parallel every 5m, often organizes length 150m ~ 200m; Described target area is the native species spawning ground of river waters; Described appropriate location is that mean depth of water is the region of 0.5m ~ 1.5m apart from bank 10m ~ 50m;
Two, fish nest is set: arrange fish nest in due course, two kinds of modes can be divided into 1. herbaceous stem fish nest material, root matter fish nest material or net matter fish nest material be tied up bunchy and be fish nest, then with cotton thread, fish nest is fixed on iron wire line, adjacent two fish nest interval 20cm; 2. branch matter fish nest material oblique cutting is entered in bed mud, be 60 ° of angles with bed mud upper surface, namely each root branch matter fish nest material becomes 1 fish nest, the oblique cutting that is linearly parallel to each other by fish nest to enter in bed mud underwater 5cm ~ 10cm and fish nest submerges, adjacent two fish nest interval 30cm, every 100 volumes are 1 group, be arranged 1 group in parallel every 10m; Described appropriate time is when before native species spawning period, 1d ~ 2d is to phytal zone, the bank migration in spawning ground; Described herbaceous stem fish nest is a kind of or wherein several mixture in the reed of rivers bank, sheep's hay and weeds, is mixed by any ratio for during mixture; Described matter fish nest is one or both the mixture in the littoral willow coring washed away by " peach blossom water " of rivers and poplar root palpus, is mixed by any ratio for during mixture; Described branch matter fish nest is one or both the mixture in the willow branch of rivers bank and branch of poplar, is mixed by any ratio for during mixture; Described net matter fish nest is a kind of or wherein several mixture in polyethylene mesh sheet, netting twine and nettle discarded in the littoral fishing of rivers, is mixed by any ratio for during mixture;
Three, hatch fish roe: the suitable pool in the target area described in step one be arranged in parallel 2 ~ 3 row net cages, each arranges 5 ~ 10 net cages, and cage size is 5m × 6m × 2m, and mesh specification is 60 orders/cm
2, each spacing of arranging two adjacent net cages is 2m, and the spacing of adjacent two row's net cages is 5m; Then the fish nest that the step 2 of adhering to fish-egg is arranged is collected, after drug disinfection, put into net cage concentrate hatching; During hatch fish roe, every day drug disinfection 1 time; Described suitable pool is that the water flows gently, the leeward region on the sunny side of mean depth of water 1.5m ~ 2m;
Four, fry is released: treat the fry hatched in step 3 net cage, after artificial culture becomes juvenile fish, then frees in river waters, completes and arranges artificial fish nest recovery Fishes In Songhua River resource.
Embodiment two: present embodiment and embodiment one are the natural spawning site of fish that river waters medium-height grass lays eggs unlike: target area described in step one.Other are identical with embodiment one.
Embodiment three: present embodiment and embodiment one or two unlike: target area described in step one is the natural spawning site of carp or pond crucian carp in river waters.Other are identical with embodiment one or two.
Embodiment four: present embodiment and embodiment one to three are when 1d ~ 2d is to phytal zone, the bank migration in spawning ground before carp or pond crucian carp spawning period unlike: appropriate time described in step 2.Setting like this, can avoid fish nest to arrange too early causing rotten, also easily adhere to other foreign material and reduce fish nest usefulness, corresponding to actual needs.Other are identical with embodiment one to three.
Embodiment five: one of present embodiment and embodiment one to four are adopt 2g/m unlike: drug disinfection described in step 3
3bleaching powder sterilization.Other are identical with one of embodiment one to four.
Embodiment six: present embodiment and one of embodiment one to five unlike: artificial culture described in step 4 becomes juvenile fish to be to the long juvenile fish for 1cm ~ 2cm of body by fry rearing.Other are identical with one of embodiment one to five.
Embodiment seven: a kind of evaluation method arranging artificial fish nest recovery Fishes In Songhua River resource impact of present embodiment is undertaken by following steps: between the fish egg-laying period, in target area, randomly draw each 3 groups of the fish nest of the fish nest of herbaceous stem fish nest material, the fish nest of root matter fish nest material, the fish nest of net matter fish nest material and branch matter fish nest material, often organize 3 fish nests; Group fish nest of is wherein brought back the attached ovum number of indoor statistics; Group fish nest of is wherein put into 3m × 4m × 1.5m, 60 orders/cm
2net cage in hatch, statistics fry hatch number; It is 100m that last group fish nest is put into area
2little pond in hatch, and by the fry rearing that hatches to the juvenile fish of 2cm ~ 3cm, then differentiate the kind of fish, add up the quantity of various fish, namely complete and the evaluation method that artificial fish nest recovers River Fish resource impact is set; Described target area is the native species spawning ground of river waters; Described herbaceous stem fish nest is a kind of or wherein several mixture in the reed of rivers bank, sheep's hay and weeds, is mixed by any ratio for during mixture; Described matter fish nest is one or both the mixture in the littoral willow coring washed away by " peach blossom water " of rivers and poplar root palpus, is mixed by any ratio for during mixture; Described branch matter fish nest is one or both the mixture in the willow branch of rivers bank and branch of poplar, is mixed by any ratio for during mixture; Described net matter fish nest is a kind of or wherein several mixture in polyethylene mesh sheet, netting twine and nettle discarded in the littoral fishing of rivers, is mixed by any ratio for during mixture.
By following verification experimental verification effect of the present invention:
Embodiment one: a kind of method arranging artificial fish nest recovery Fishes In Songhua River resource is carried out according to the following steps:
One, arrange bamboo bar: bamboo bar that a length is 2.5m ~ 3.0m is inserted and the length that the end of bamboo bar inserts bed mud is 50cm ~ 80cm every 1.5m in the appropriate location in target area, surface 1m ~ 1.5m for the top of bamboo bar; Then at 20cm ~ 30cm place, underwater, employing diameter is that bamboo bar is concatenated by the iron wire line of 1mm ~ 1.5mm; Be arranged in a linear by bamboo bar, each row volume is 1 group, be arranged 1 group in parallel every 5m, often organizes length 150m ~ 200m; Described target area is the native species spawning ground of river waters; Described appropriate location is that mean depth of water is the region of 0.5m ~ 1.5m apart from bank 10m ~ 50m;
Two, fish nest is set: arrange fish nest in due course, two kinds of modes can be divided into 1. herbaceous stem fish nest material, root matter fish nest material or net matter fish nest material be tied up bunchy and be fish nest, then with cotton thread, fish nest is fixed on iron wire line, adjacent two fish nest interval 20cm; 2. branch matter fish nest material oblique cutting is entered in bed mud, be 60 ° of angles with bed mud upper surface, namely each root branch matter fish nest material becomes 1 fish nest, the oblique cutting that is linearly parallel to each other by fish nest to enter in bed mud underwater 5cm ~ 10cm and fish nest submerges, adjacent two fish nest interval 30cm, every 100 volumes are 1 group, be arranged 1 group in parallel every 10m; Described appropriate time is when before native species spawning period, 1d ~ 2d is to phytal zone, the bank migration in spawning ground; Described herbaceous stem fish nest is a kind of or wherein several mixture in the reed of rivers bank, sheep's hay and weeds; Described matter fish nest is one or both the mixture in the littoral willow coring washed away by " peach blossom water " of rivers and poplar root palpus; Described branch matter fish nest is one or both the mixture in the willow branch of rivers bank and branch of poplar; Described net matter fish nest is a kind of or wherein several mixture in polyethylene mesh sheet, netting twine and nettle discarded in the littoral fishing of rivers;
Three, hatch fish roe: the suitable pool in the target area described in step one be arranged in parallel 2 ~ 3 row net cages, each arranges 5 ~ 10 net cages, and cage size is 5m × 6m × 2m, and mesh specification is 60 orders/cm
2, each spacing of arranging two adjacent net cages is 2m, and the spacing of adjacent two row's net cages is 5m; Then the fish nest that the step 2 of adhering to fish-egg is arranged is collected, after drug disinfection, put into net cage concentrate hatching; During hatch fish roe, every day drug disinfection 1 time; Described suitable pool is that the water flows gently, the leeward region on the sunny side of mean depth of water 1.5m ~ 2m;
Four, fry is released: treat the fry hatched in step 3 net cage, after artificial culture becomes juvenile fish, then frees in river waters, completes and arranges artificial fish nest recovery Fishes In Songhua River resource.
Target area described in step one is positioned at river, urban district, Fujin, downstream, Song Hua River section, and area is about 1720m
2.Target area 5 monthly average water temperature 14.7 DEG C, June 18.4 DEG C, carp, pond crucian carp egg-laying period basic synchronization, be about for 6 the first tenday period of a month, and the Sheng phase is mid-June, duration, pond crucian carp 8 ~ 10 days, carp 3 ~ 5 days.
Embodiment two: a kind of evaluation method arranging artificial fish nest recovery Fishes In Songhua River resource impact is undertaken by following steps: between the fish egg-laying period, in the target area of embodiment one, randomly draw each 3 groups of the fish nest of the fish nest of herbaceous stem fish nest material, the fish nest of root matter fish nest material, the fish nest of net matter fish nest material and branch matter fish nest material, often organize 3 fish nests; Group fish nest of is wherein brought back the attached ovum number of indoor statistics; Group fish nest of is wherein put into 3m × 4m × 1.5m, 60 orders/cm
2net cage in hatch, statistics fry hatch number; It is 100m that last group fish nest is put into area
2little pond in hatch, and by the fry rearing that hatches to the juvenile fish of 2cm ~ 3cm, then differentiate the kind of fish, add up the quantity of various fish, namely complete and the evaluation method that artificial fish nest recovers River Fish resource impact is set; Described target area is the native species spawning ground of river waters; Described herbaceous stem fish nest is a kind of or wherein several mixture in the reed of rivers bank, sheep's hay and weeds; Described matter fish nest is one or both the mixture in the littoral willow coring washed away by " peach blossom water " of rivers and poplar root palpus; Described branch matter fish nest is one or both the mixture in the willow branch of rivers bank and branch of poplar; Described net matter fish nest is a kind of or wherein several mixture in polyethylene mesh sheet, netting twine and nettle discarded in the littoral fishing of rivers.
The attached ovum number that table 1 is artificial fish nest in adjacent 2 years embodiment one target areas, fertilized egg number, fry hatch number and carp, pond crucian carp quantity
Table 2 is the total attached ovum number of artificial fish nest in adjacent 2 years embodiment one target areas, fertilization rate, fry sum and carp, pond crucian carp sum
From the result of embodiment two, the native species spawning ground of the method choice river waters of embodiment one arranges artificial fish nest, only the spawning ground of 1720m2 just can obtain more than fry 2,000 ten thousand tail 2 mating seasons, wherein more than Main Commercial Fishes carp, pond crucian carp 4,000,000 tail, be obvious to the effect of the recovery stock of fish.Thus a kind of method arranging artificial fish nest recovery Fishes In Songhua River resource of the present invention is practicable, and the problem that downstream, the current Song Hua River stock of fish is degenerated in order to solve, Fish Species Diversity declines provides an effective way.
Claims (7)
1. the method that artificial fish nest recovers Fishes In Songhua River resource is set, it is characterized in that the method arranging artificial fish nest recovery Fishes In Songhua River resource is carried out according to the following steps:
One, arrange bamboo bar: bamboo bar that a length is 2.5m ~ 3.0m is inserted and the length that the end of bamboo bar inserts bed mud is 50cm ~ 80cm every 1.5m in the appropriate location in target area, surface 1m ~ 1.5m for the top of bamboo bar; Then at 20cm ~ 30cm place, underwater, employing diameter is that bamboo bar is concatenated by the iron wire line of 1mm ~ 1.5mm; Be arranged in a linear by bamboo bar, each row volume is 1 group, be arranged 1 group in parallel every 5m, often organizes length 150m ~ 200m; Described target area is the native species spawning ground of river waters; Described appropriate location is that mean depth of water is the region of 0.5m ~ 1.5m apart from bank 10m ~ 50m;
Two, fish nest is set: arrange fish nest in due course, two kinds of modes can be divided into 1. herbaceous stem fish nest material, root matter fish nest material or net matter fish nest material be tied up bunchy and be fish nest, then with cotton thread, fish nest is fixed on iron wire line, adjacent two fish nest interval 20cm; 2. branch matter fish nest material oblique cutting is entered in bed mud, be 60 ° of angles with bed mud upper surface, namely each root branch matter fish nest material becomes 1 fish nest, the oblique cutting that is linearly parallel to each other by fish nest to enter in bed mud underwater 5cm ~ 10cm and fish nest submerges, adjacent two fish nest interval 30cm, every 100 volumes are 1 group, be arranged 1 group in parallel every 10m; Described appropriate time is when before native species spawning period, 1d ~ 2d is to phytal zone, the bank migration in spawning ground; Described herbaceous stem fish nest is a kind of or wherein several mixture in the reed of rivers bank, sheep's hay and weeds; Described matter fish nest is one or both the mixture in the littoral willow coring washed away by " peach blossom water " of rivers and poplar root palpus; Described branch matter fish nest is one or both the mixture in the willow branch of rivers bank and branch of poplar; Described net matter fish nest is a kind of or wherein several mixture in polyethylene mesh sheet, netting twine and nettle discarded in the littoral fishing of rivers;
Three, hatch fish roe: the suitable pool in the target area described in step one be arranged in parallel 2 ~ 3 row net cages, each arranges 5 ~ 10 net cages, and cage size is 5m × 6m × 2m, and mesh specification is 60 orders/cm
2, each spacing of arranging two adjacent net cages is 2m, and the spacing of adjacent two row's net cages is 5m; Then the fish nest that the step 2 of adhering to fish-egg is arranged is collected, after drug disinfection, put into net cage concentrate hatching; During hatch fish roe, every day drug disinfection 1 time; Described suitable pool is that the water flows gently, the leeward region on the sunny side of mean depth of water 1.5m ~ 2m;
Four, fry is released: treat the fry hatched in step 3 net cage, after artificial culture becomes juvenile fish, then frees in river waters, completes and arranges artificial fish nest recovery Fishes In Songhua River resource.
2. according to claim 1 a kind of the method that artificial fish nest recovers Fishes In Songhua River resource is set, it is characterized in that target area described in step one is the natural spawning site of fish that river waters medium-height grass lays eggs.
3. a kind of method arranging artificial fish nest recovery Fishes In Songhua River resource according to claim 1, is characterized in that target area described in step one is the natural spawning site of carp or pond crucian carp in river waters.
4. according to claim 1 a kind of the method that artificial fish nest recovers Fishes In Songhua River resource is set, it is characterized in that appropriate time described in step 2 is when 1d ~ 2d is to phytal zone, the bank migration in spawning ground before carp or pond crucian carp spawning period.
5. a kind of method arranging artificial fish nest recovery Fishes In Songhua River resource according to claim 1, is characterized in that drug disinfection described in step 3 adopts 2g/m
3bleaching powder sterilization.
6. a kind of method arranging artificial fish nest recovery Fishes In Songhua River resource according to claim 1, is characterized in that artificial culture described in step 4 becomes juvenile fish to be to the long juvenile fish for 1cm ~ 2cm of body by fry rearing.
7. one kind arranges the evaluation method that artificial fish nest recovers Fishes In Songhua River resource impact, it is characterized in that the evaluation method arranging artificial fish nest recovery Fishes In Songhua River resource impact is undertaken by following steps: between the fish egg-laying period, in target area, randomly draw each 3 groups of the fish nest of the fish nest of herbaceous stem fish nest material, the fish nest of root matter fish nest material, the fish nest of net matter fish nest material and branch matter fish nest material, often organize 3 fish nests; Group fish nest of is wherein brought back the attached ovum number of indoor statistics; Group fish nest of is wherein put into 3m × 4m × 1.5m, 60 orders/cm
2net cage in hatch, statistics fry hatch number; It is 100m that last group fish nest is put into area
2little pond in hatch, and by the fry rearing that hatches to the juvenile fish of 2cm ~ 3cm, then differentiate the kind of fish, add up the quantity of various fish, namely complete and the evaluation method that artificial fish nest recovers River Fish resource impact is set; Described target area is the native species spawning ground of river waters; Described herbaceous stem fish nest is a kind of or wherein several mixture in the reed of rivers bank, sheep's hay and weeds; Described matter fish nest is one or both the mixture in the littoral willow coring washed away by " peach blossom water " of rivers and poplar root palpus; Described branch matter fish nest is one or both the mixture in the willow branch of rivers bank and branch of poplar; Described net matter fish nest is a kind of or wherein several mixture in polyethylene mesh sheet, netting twine and nettle discarded in the littoral fishing of rivers.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104938377A (en) * | 2015-06-01 | 2015-09-30 | 中国科学院东北地理与农业生态研究所 | Manual spawning ground constructing method for recovering Songhua river fish resources and evaluation method of effect thereof |
| CN115644109A (en) * | 2022-08-15 | 2023-01-31 | 广州翔曦科技有限公司 | Artificial fish nest device for viscous and sinking ovichthys and application method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104938377A (en) * | 2015-06-01 | 2015-09-30 | 中国科学院东北地理与农业生态研究所 | Manual spawning ground constructing method for recovering Songhua river fish resources and evaluation method of effect thereof |
| CN115644109A (en) * | 2022-08-15 | 2023-01-31 | 广州翔曦科技有限公司 | Artificial fish nest device for viscous and sinking ovichthys and application method |
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