CN102636821A - Investigation method for quantitative research of conservation range of rocky reef habitat - Google Patents
Investigation method for quantitative research of conservation range of rocky reef habitat Download PDFInfo
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- CN102636821A CN102636821A CN2012101187143A CN201210118714A CN102636821A CN 102636821 A CN102636821 A CN 102636821A CN 2012101187143 A CN2012101187143 A CN 2012101187143A CN 201210118714 A CN201210118714 A CN 201210118714A CN 102636821 A CN102636821 A CN 102636821A
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Abstract
The invention relates to an investigation method for the quantitative research of a conservation range of a rocky reef habitat and belongs to the technical field of the assessment of rocky reef habitat resources, and the investigation method is mainly used for determining the conservation range, which is a distance away from a shore, of the rocky reef habitat and improving the investigation accuracy of the rocky reef habitat resources. The investigation method comprises the following operation steps: carrying out bottom material investigation on a selected rocky reef habitat region, and determining the types of bottom materials nearby the rocky reef habitat; dividing investigation areas according to the types of the bottom materials, and determining an investigating cross section; and arranging 5 sites, which are vertical to a shoreline and are outward from the shore, on the determined cross section, and placing a trammel net and a crab pot at each site for investigation. The investigation method provided by the invention has the advantages that the conservation range of the rocky reef habitat can be quantitatively researched, and the conservation condition of the rocky reef habitat resources can be accurately assessed.
Description
Technical field
The present invention relates to a kind of investigation method of quantitative examination cay habitat maintenance scope, be used for confirming the maintenance scope of cay habitat offshore distance, belong to cay habitat resource evaluation technical field.
Background technology
The habitat is claimed in the habitat again, is meant the environment of biological individuality, population or coenobiosis region, comprises that essential life condition and other are to the acting ecofactor of biology.The habitat is comprehensively formed by biological and abiotic component, and includes only abiotic environment when describing a biocenological habitat usually.
And the islands and reefs marine site is meant island distribution closeer waters relatively; China islands and reefs marine site mainly is distributed in Eastern China and southern coastal waters, and there are entrance of Changjiang River-Hangzhou Wan-Zhoushan Islands-fragrant-flowered garlic mountain archipelago-fishing mountain archipelago, Oujiangkou-Dongtou archipelago-Nan muntjac archipelago, Min Jiangkou-Mazu Liedao, the mouth of the Zhujiang River-archipelago, the Wanshan Mountain, Zhen Haiwan-archipelago, mountains and rivers or the like in its representative marine site.Have natural habitat types such as silt, sandstone, stiff mud, mud, cay, algae field.
Wherein the cay habitat is the typical habitats type in the islands and reefs marine site; Be meant in the cay shale ocean dimly visible in water surface rock up and down and the landform such as rock-like thing of being piled into by anthozoic remains; Though the area occupied ratio is not high; But living resources are very abundant in it, have higher Diversity of Fish and richness than sand ground, mud ground habitat, are the very important habitat type in islands and reefs marine site.The cay habitat has constituted habitat complicated and changeable with the tangleweed group of its support, for fish provide good habitat and refuge.
Because very high bio-diversity is being supported in the cay habitat, is a kind of very important ecosystem.These reefs not only become the adherance of many marine animal and plants; Also good habitat is provided simultaneously for other bottom-dwellings and nektonic organism; With the laying eggs, ingest and keep away demands such as enemy of the breeding, growth and the growth phase that satisfy them, thereby form diversified biological group.From world wide, it is abundant relatively that littoral zone is coated with the stock of fish of the cay habitats of various marine algas assembling, and than the unvegetated husky mud substrate of periphery habitat higher Diversity of Fish and richness arranged, and more juvenile fish quantity.Except supporting inner abundant biota, also there are many influences in the cay habitat to the macro-organism in contiguous soft phase substrate zone, and some biological population densities can be along with the far and near distribution gradient apart from the cay habitat.Given this, each coastwise contries has all carried out many-sided research to the fish fauna in its subtidal zone cay habitat, seas under its jurisdiction.
At present, for the research of cay habitat and surrounding waters, correlative study both at home and abroad is existing a lot; Research contents relates to aspects such as the fishery resources structure, group's richness, bottom-dwelling, macro in cay habitat; Along with deepening continuously of research, research not only is confined to fish group general layout, and many theoretical methods about investigation obtain research; Based on the result of field investigation, analyze and contrasted the error that random sampling, stratified sampling and systematic sampling brought.
But research to the cay habitat; Basically be confined to internal influence zone, cay habitat; Quantitatively Journal of Sex Research also is confined to macrobenthos; Use the sample prescription sample mode, cay habitat bottom-dwelling distribution range has been done Quantitative study, still lack of the maintenance ranges quantitative research of cay habitat the stock of fish.
Because the cay habitat is near bank or the islands and reefs mostly, more shallow near the bank and the depth of water, the investigation in existing trawlnet, the inapplicable cay of the netting gear habitat that resource exploration is commonly used at present such as throw the net.And the kind that the resulting fishery harvesting of different netting gears or sample mode is formed, efficient are different, also can be affected to the degree of accuracy of resource understanding, and therefore, also be the key factor that influences cay habitat biological assessment to the selection of investigation method.And also do not have suitable investigation method to come cay habitat biology is estimated at present.
Summary of the invention
By Given this, technical matters to be solved by this invention is to the disappearance to existing in the cay habitat survey method in the above-mentioned prior art, and provides a kind of standardization, investigation precision high, investigation method that can quantitative evaluation cay habitat maintenance scope.
For solving the problems of the technologies described above; Technical scheme of the present invention is to realize like this; A kind of investigation method of quantitative examination cay habitat maintenance scope; Said quantitative examination cay habitat maintenance scope refers to the offshore distance of cay habitat maintenance scope, it is characterized in that: said investigation method comprises the steps
1) to carrying out bottom characteristics exploration around the investigation cay zone;
2) based on the investigation result of (1), carrying out the section setting perpendicular to water front, is cay habitat survey district with petrofacies sediment substrate accounting example than major types, and all the other are different substrates check plots, and different section is spaced apart 500 meters;
3) on each section, set gradually 5 investigation websites;
4) place at each website and be used for assessing the bottom or the trammel net of nektonic organism resource at the middle and upper levels, and be used for assessing the crab pot that is difficult for being caught species resource by gill net;
5) based on above-mentioned investigation result, the composition of fish kind and the biomass of catching is the boundary just at obvious difference or resource component fluctuation significantly on the contrast offshore different distance, confirms the resource maintenance scope in cay habitat.
Said investigation cay zone is big type of the substrate in the offshore 200m scope.
10 meters of first website offshores of said investigation website, 40 meters of the 2nd website offshores, 80 meters of the 3rd website offshores, 130 meters of the 4th website offshores, 200 meters of the 5th website offshores.
Said trammel net is arranged in a combination by length direction by six gill nets successively, and every gill net length is 30m, and said crab pot is formed by 10 one group.
Every gill net of said trammel net is by interior mesh, outer mesh and be folded in the etting composition between the inside and outside mesh; The interior size of mesh of said six gill nets is chosen between 21-30mm, 31-40mm, 41-50mm, 51-60mm, 61-70mm, 71-80mm respectively; Said outer mesh is of a size of 270mm; Net height 1.8m, net length of a film 30m.
The interior mesh random groups of said six gill net different sizes is closed arrangement.
The interior mesh of said six gill nets is selected a size of mesh in each scope, after confirming a size of mesh, all the other each size of meshes are at interval between 9mm-20mm.
Said trammel net modes of emplacement makes netting gear be in fully in the cay habitat range simultaneously, with the resource in avoid confusion cay habitat and peripheral marine site for being parallel to water front and placing perpendicular to trend to greatest extent.
Be that each website was placed in 24 hours the standing time of said trammel net and crab pot.
10 said every group crab pots connect together, and cooperate gill net to be placed on website, and direction is consistent with gill net, is parallel to the water front setting, and be 24 hours standing time.
Beneficial effect of the present invention: through above-mentioned investigation method, maintenance scope that can quantitative examination cay habitat is accurately assessed cay habitat resource maintenance situation.Investigation method of the present invention has the accuracy rate height, and catching rate is high, and advantages of simple operation.Be applicable to that multiple habitat survey especially among a small circle or the investigation of immediate offshore area resource; Investigation result is objective comprehensively, can fully reflect the structure and the composition of fishery resources, and helps reducing the influence that changes round the clock investigation result.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the structural representation of trammel net of the present invention.
Fig. 3 is six gill net structure arranged of trammel net of the present invention synoptic diagram.
Fig. 4 is the structural representation of crab pot of the present invention.
Embodiment
Below in conjunction with accompanying drawing; The present invention is specified, as shown in Figure 1, the investigation method of a kind of quantitative examination cay of the present invention habitat maintenance scope; Said quantitative examination cay habitat maintenance scope refers to the offshore distance of cay habitat maintenance scope, and concrete steps are following:
1) to carrying out bottom characteristics exploration around the investigation cay zone, different investigation sections 1 is set, specifically will investigates thoroughly the big class of substrate in the offshore 200m scope according to different substrates;
2) based on the investigation result of (1); Carry out the section setting perpendicular to water front 4; Petrofacies sediment substrate accounting example is made as cay habitat survey district 2 than major types, and all the other substrates are established check plot 3, for example natural habitat types such as silt, sandstone, stiff mud, mud, algae field.The section of different substrates minor increment at interval is 500 meters.Petrofacies are rock or the rock associations that form in certain sedimentary environment, and it is the chief component of sedimentary facies;
3) 5 investigation websites are set on each section, 10 meters of said first website 5 offshores, 40 meters of the 2nd website 6 offshores, 80 meters of the 3rd website 7 offshores, 130 meters of the 4th website 8 offshores, 200 meters of the 5th website 9 offshores;
4) place trammel net 10 at each website and investigate with crab pot 11, said trammel net 10 is arranged in a combination by length direction by six gill nets successively, and every gill net length is 30m, and said crab pot 11 is formed by 10 one group.Trammel net 10 is used for assessing bottom or the resource The Nomenclature Composition and Structure of Complexes of nektonic organism at the middle and upper levels, and crab pot 11 is used for assessing the resource situation that star Gnathophis, conger pile etc. are difficult for being caught by gill net kind.
As shown in Figure 2; Said trammel net 10 is made up of interior mesh 12, outer mesh and the etting that is located between the inside and outside mesh; Size of mesh is chosen between 21-30mm, 31-40mm, 41-50mm, 51-60mm, 61-70mm, 71-80mm respectively in six gill nets of said trammel net 10; Said outer mesh is of a size of 270mm, net height 1.8m, net length of a film 30m.The etting of said trammel net 10 is installed on the upper and lower guiding principle.Etting netting twine material is the nylon heald, and the netting twine rugosity can be elected 0.5mm as; Headline is assemblied in the upper limb of etting, bears lateral pull, is made up of upper limb guiding principle and float 13; Infraclass is a sinker 14, with the position of balance trammel net 10 in water.
The interior mesh of the variant specification of said trammel net is assembled arrangement at random; To eliminate the sampling error that mesh size is brought; Promptly eliminate the error that the netting gear setting brings; Guarantee that large and small individual fish all can be caught at random, so that understand more accurately and assess cay habitat resource maintenance situation, Fig. 3 is a kind of frame mode that mesh is arranged in each.
The interior mesh of said six gill nets is selected a size of mesh in each scope, after confirming a size of mesh, all the other each size of meshes are at interval between 9mm-20mm, conveniently to catch the nektonic organism in the corresponding size scope.For example six interior size of meshes can be chosen to be 22mm, 34mm, 43mm, 50mm, 60mm and 80mm.
Said trammel net 10 modes of emplacements to guarantee the capture rate of fish, make netting gear be in fully in the cay habitat range simultaneously, the resource in avoid confusion cay habitat and peripheral marine site for being parallel to water front and placing perpendicular to trend to greatest extent.
Above-mentioned trammel net and crab pot standing time are each website 24 hours.Because the behavior round the clock of part fish is different, for fear of the sampling error of bringing because of the fish behavior, estimates and placed 24 hours, to eliminate the error that fish movement difference is round the clock brought.
As shown in Figure 4, be the structural drawing of crab pot 11, said crab pot adopts cylindrical horizontal type structure, in crab pot 11, is provided with bracing frame 15, and the side is provided with lures mouth 16, and crab pot 11 can be difficult for star Gnathophis, conger pile etc. to be caught catching of kind by gill net easily.
Crab pot is connected together by every group of 10 crab pots, and cooperates trammel net 10 to place website, and direction is consistent with trammel net 10, is parallel to the water front setting, and be 24 hours standing time.Can make crab pot and gill net form complementation based on this, be convenient to the whole structure of community of complete understanding, be convenient to layering simultaneously and how much compare resource, confirm cay habitat maintenance scope.
Based on above-mentioned investigation result, fishery harvesting kind and biomass are formed on the contrast offshore different distance, are the boundary just significantly at obvious difference or resource component fluctuation, confirm the resource maintenance scope in cay habitat.
The description of above-mentioned embodiment is the concrete embodiment of the present invention, but can not limits protection scope of the present invention with this, and variation and the modification done in this way in every case are all within protection scope of the present invention.
Claims (10)
1. the investigation method of a quantitative examination cay habitat maintenance scope, said quantitative examination cay habitat maintenance scope is meant the offshore distance of cay habitat maintenance scope, it is characterized in that: said investigation method comprises the steps,
1) to carrying out bottom characteristics exploration around the investigation cay zone;
2) based on the investigation result of (1), being provided with section perpendicular to water front, is cay habitat survey district with petrofacies sediment substrate accounting example than major types, and all the other are different substrates check plots, and the section of different substrates minor increment at interval is 500 meters;
3) on each section, set gradually 5 investigation websites;
4) place at each website and be used for assessing the bottom or the trammel net of nektonic organism resource at the middle and upper levels, and be used for assessing the crab pot that is difficult for being caught species resource by gill net;
5) based on above-mentioned investigation result, institute's fish kind of catching and biomass are formed on the contrast offshore different distance, just are the boundary significantly at obvious difference or resource component fluctuation, confirm the resource maintenance scope in cay habitat.
2. the investigation method of a kind of quantitative examination cay habitat maintenance scope according to claim 1 is characterized in that: said investigation cay zone is big type of the substrate in the offshore 200m scope.
3. the investigation method of a kind of quantitative examination cay habitat maintenance scope according to claim 2; It is characterized in that: 10 meters of first website offshores of said investigation website; 40 meters of the 2nd website offshores; 80 meters of the 3rd website offshores, 130 meters of the 4th website offshores, 200 meters of the 5th website offshores.
4. the investigation method of a kind of quantitative examination cay habitat maintenance scope according to claim 1; It is characterized in that: said trammel net is arranged in a combination by length direction by six gill nets successively; Every gill net length is 30m, and said crab pot is formed by 10 one group.
5. the investigation method of a kind of quantitative examination cay habitat maintenance scope according to claim 4; It is characterized in that: every gill net of said trammel net is by interior mesh, outer mesh and be folded in the etting composition between the inside and outside mesh; The interior size of mesh of said six gill nets is chosen between 21-30mm, 31-40mm, 41-50mm, 51-60mm, 61-70mm, 71-80mm respectively; Said outer mesh is of a size of 270mm, net height 1.8m, net length of a film 30m.
6. the investigation method of a kind of quantitative examination cay habitat maintenance scope according to claim 5 is characterized in that: the interior mesh random groups of said six gill net different sizes is closed arrangement.
7. the investigation method of a kind of quantitative examination cay habitat maintenance scope according to claim 5; It is characterized in that: the interior mesh of said six gill nets is selected a size of mesh in each scope; After confirming a size of mesh, all the other each interior mesh size intervals are between 9mm-20mm.
8. the investigation method of a kind of quantitative examination cay habitat maintenance scope according to claim 4; It is characterized in that: said trammel net modes of emplacement is for being parallel to water front and placing perpendicular to trend; Simultaneously netting gear is in the cay habitat range fully, with the resource in avoid confusion cay habitat and peripheral marine site.
9. the investigation method of a kind of quantitative examination cay habitat maintenance scope according to claim 1 is characterized in that: 24 hour place for each website the standing time of said trammel net and crab pot.
10. the investigation method of a kind of quantitative examination cay habitat maintenance scope according to claim 7; It is characterized in that: 10 said every group crab pots connect together, and cooperate gill net to be placed on website, and direction is consistent with gill net; Be parallel to the water front setting, be 24 hours standing time.
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| CN 201210118714 CN102636821B (en) | 2012-04-20 | 2012-04-20 | Investigation method for quantitative research of conservation range of rocky reef habitat |
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Cited By (5)
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| CN102907359A (en) * | 2012-10-19 | 2013-02-06 | 中国水产科学研究院东海水产研究所 | Method for obtaining acoustic evaluation data in artificial fish reefs |
| CN104268786A (en) * | 2014-09-24 | 2015-01-07 | 中国科学院水生生物研究所 | Reservoir fish resource acoustics investigation method |
| CN106845097A (en) * | 2017-01-12 | 2017-06-13 | 上海海洋大学 | The methods of sampling of the stock of fish under a kind of many habitat conditions |
| CN108932377A (en) * | 2018-05-31 | 2018-12-04 | 中国水产科学研究院珠江水产研究所 | A kind of fish spawning ground accurate positioning method and system |
| CN111631177A (en) * | 2020-04-28 | 2020-09-08 | 中国水产科学研究院东海水产研究所 | Quantitative investigation device and method for early resources of eriocheir sinensis |
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2012
- 2012-04-20 CN CN 201210118714 patent/CN102636821B/en not_active Expired - Fee Related
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| CN102907359A (en) * | 2012-10-19 | 2013-02-06 | 中国水产科学研究院东海水产研究所 | Method for obtaining acoustic evaluation data in artificial fish reefs |
| CN104268786A (en) * | 2014-09-24 | 2015-01-07 | 中国科学院水生生物研究所 | Reservoir fish resource acoustics investigation method |
| CN106845097A (en) * | 2017-01-12 | 2017-06-13 | 上海海洋大学 | The methods of sampling of the stock of fish under a kind of many habitat conditions |
| CN108932377A (en) * | 2018-05-31 | 2018-12-04 | 中国水产科学研究院珠江水产研究所 | A kind of fish spawning ground accurate positioning method and system |
| CN108932377B (en) * | 2018-05-31 | 2022-11-01 | 中国水产科学研究院珠江水产研究所 | Accurate positioning method and system for fish spawning site |
| CN111631177A (en) * | 2020-04-28 | 2020-09-08 | 中国水产科学研究院东海水产研究所 | Quantitative investigation device and method for early resources of eriocheir sinensis |
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