CN106651468B - Method for estimating size of spawning site of fishes laying muco-sinking eggs in rivers - Google Patents
Method for estimating size of spawning site of fishes laying muco-sinking eggs in rivers Download PDFInfo
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- 241000251468 Actinopterygii Species 0.000 title claims abstract description 45
- 235000019688 fish Nutrition 0.000 title claims abstract description 45
- 235000013601 eggs Nutrition 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000011835 investigation Methods 0.000 claims abstract description 19
- 238000009395 breeding Methods 0.000 claims abstract description 14
- 230000001488 breeding effect Effects 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 230000035558 fertility Effects 0.000 claims abstract description 9
- 230000001850 reproductive effect Effects 0.000 claims abstract description 4
- 230000001568 sexual effect Effects 0.000 claims description 12
- 230000002710 gonadal effect Effects 0.000 claims description 2
- 241000746773 Hemibagrus guttatus Species 0.000 description 10
- 241000252210 Cyprinidae Species 0.000 description 5
- 241000252233 Cyprinus carpio Species 0.000 description 3
- 241000252234 Hypophthalmichthys nobilis Species 0.000 description 2
- 230000017448 oviposition Effects 0.000 description 2
- 241000252211 Carassius Species 0.000 description 1
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- 235000019514 herring Nutrition 0.000 description 1
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Abstract
The invention provides a spawning ground scale estimation method for fishes laying muco-sinking eggs in rivers, which estimates a spawning ground scale T according to the total population quantity S of investigators, the number proportion P1 of sexually mature individuals, the number proportion P2 of females in breeding populations, the proportion P3 of spawned individuals and the relative fecundity R, wherein the spawning ground scale T is S × P1 × P2 × P3 × W × R. According to the method, by fishery fishing investigation, fish population growth and death parameter estimation and reproductive biological parameters, the problem of estimating the size of the spawning site of fishes producing viscous eggs is solved, and the problem that work cannot be carried out due to the fact that the difficulty of counting the area of the spawning area, the density of the spawns and the like under water is large or equipment cannot meet requirements is solved.
Description
Technical Field
The invention relates to a method for estimating the size of a spawning site, in particular to a method for estimating the size of a spawning site of fishes spawning muco-sinking eggs in rivers.
Background
River freshwater fish resources have a tendency of rapid decline in the past decades due to over-fishing, water environment pollution, dam construction, sand excavation and the like. One important cause of the fluctuation of the amount of fish resources is the loss or destruction of habitat environment. The fish spawning site is an important and sensitive place in a fish habitat, is an important place for spawning and breeding of fishes, and is related to the breeding and the inhabitation of fish populations. Therefore, research and study on the position and scale of a fish spawning site are also important in fish protection ecology research and are also objects of important concern in the current wading engineering.
Different fishes have different reproduction habits, and can be divided into spawning drifting eggs, viscous and sinking eggs and other special spawning types according to the properties of fish eggs, and most fishes belong to the first two types. For fishes laying drifting eggs (such as herring, grass carp, silver carp, bighead carp and the like), the early life history stage of the fishes has a passive drifting development process along with water flow, researchers generally deduce the position of an egg laying field according to the development period of the collected eggs and the flow rate of river water, and can estimate the scale of the egg laying field according to the section runoff of the river and the density of the collected eggs. However, most of fishes producing sticky and heavy eggs (such as carps, crucian carps, mystus guttatus and the like) are resident fishes, and the eggs usually adhere to waterweeds, gravels or rocks in living water areas to develop, so that the scale of the spawning sites of the fishes is difficult to estimate, which is also the reason why the scale of the spawning sites of the fishes producing sticky and heavy eggs is basically not reported so far.
Therefore, a method for investigating the scale of the spawning site of the fish with the myxosubmerged eggs in a stable manner is urgently needed, and the scale of the spawning site of the fish with the myxosubmerged eggs can be scientifically and accurately reflected.
Disclosure of Invention
The invention aims to provide a method for estimating the size of a spawning site of fishes spawning myxopyeggs in rivers.
A method for estimating the size of a spawning site of fishes spawning muco-sinkiang eggs in a river comprises the following steps:
1) carrying out fishery fishing investigation in a water area of a spawning site, wherein investigation time periods cover investigation objects, namely three time periods of a breeding period, a fattening period and a wintering period of fishes producing sticky and heavy eggs, and basic data are obtained, wherein the basic data comprise the number N of fishing boats, annual fishing operation days D and the number N of single-boat fisheries of the investigation objects; meanwhile, the proportion P1 of sexual maturity individuals and the proportion P2 of females in the sexual maturity individuals of the research object in the fish catch are obtained through anatomical analysis, and the proportion P3 of the number of females who lay eggs in the fish catch in the reproductive period in the sexual maturity females is judged according to the gonadal development period.
2) And estimating the growth and death parameters of the surveyed object to obtain a total death coefficient Z and a natural death coefficient M, and further calculating the development rate E of the surveyed object.
3) And estimating the total quantity S of the surveyed objects in the water area of the spawning ground according to the number N of the single-boat fisheries, the number N of the fishing boats, the number D of fishing operation days and the development rate E.
4) Measuring and counting the average tail weight w and the relative fecundity R of the female sexual mature individuals of the surveyed object;
5) the spawning ground size is estimated according to the total population quantity S of the surveyed objects, the proportion P1 of the quantity of sexual maturity individuals, the proportion P1 of the quantity of females in the breeding population, the proportion P3 of the spawned individuals and the relative fecundity R, and the spawning ground size T is S multiplied by P1 multiplied by P2 multiplied by P3 multiplied by w multiplied by R.
Further, the development rate E ═ Z-M)/Z in the step 2).
Further, in the step 3), the total number S is N × D × N/E.
Further, the subject is a colonizing, muco-precipitating oviparous fish.
Further, the ratio of the number of the female who has spawned to the number of the female who has sexually matured P3 is obtained only depending on the result of the reproductive phase survey. Furthermore, the P1 and the P2 are obtained according to the investigation results of three periods of a breeding period, a fattening period and a wintering period.
The invention has the beneficial effects that:
the method has the advantages that through fishery fishing investigation, fish population growth and death parameter estimation and breeding biological parameters are combined, the problem of estimating the size of the spawning site of the fish producing the sticky and sinking eggs is solved, and the problem that the work cannot be carried out due to the fact that the difficulty of underwater spawning area statistics, the density of the eggs and the like is large or equipment cannot meet the requirements is solved.
Detailed Description
The technical solution of the present invention is described in detail by the following specific examples, but the scope of the present invention is not limited by these examples.
Example 1 estimation of scale of Mystus guttatus spawning site in Wuxuanjiang river
The Wuxuan river section is positioned at the downstream of the intersection of the red river and the Yangtze river in the middle of the Zhujiang river, has quick water depth and good water quality, is suitable for inhabitation life of the mystus guttatus along the bank and is also an important spawning ground of the Mystus guttatus. But because of the limitation of hardware equipment conditions, the estimation of the size of the spawning site is difficult, but the method can solve the problem of the estimation of the spawning site.
1) Carrying out fishery fishing investigation in 2016, 3, 6 and 10 months in the Wuxuan river section, knowing that the number of professional fishing operation fishing boats distributed in the river section is 60, and the number of annual fishing operation days is 200 days, and carrying out investigation statistics on 45 boat times of fishing objects to count the number of mystus guttatus 118 tails, so that the number of mystus guttatus fished by a single boat is 2.6; meanwhile, through anatomical analysis, 20% of the proportion P1 of sexually mature individuals of mystus guttatus in the fish catch was obtained, wherein the proportion of females in the mature individuals was 56% P2, and the proportion of females having spawned was 45% P3.
2) The growth and death parameters of mystus guttatus in wuXuanjiang river were estimated, and the total death coefficient Z was 1.62 and the natural death coefficient M was 0.45, and the development rate E ═ Z-M/Z ═ 0.72 was calculated.
3) The total quantity of the study objects in the water area of the spawning ground can be estimated according to the number N of single-boat fisheries, the number N of fishing boats, the number D of fishing operation days, the tail average weight w and the development rate E, wherein the total quantity S is equal to N multiplied by D multiplied by N/E equal to 60 multiplied by 200 multiplied by 2.6 divided by 0.72 equal to 43333 tails.
4) Measuring and counting the average tail weight w of female sexual maturation individuals to be 2745g and the relative fecundity R to be 7 grains/g;
5) the spawning ground size T ═ S × P1 × P2 × P3 × w × R ═ 43333 × 20% × 56% × 45% × 2745 × 7 ═ 41965237, can be estimated from the total population number S of the investigational subjects, the proportion of the number of sexually mature individuals P1, the proportion of the number of females in the breeding population P1, the proportion of individuals who have spawned P3, and the relative fecundity amount R.
Therefore, the scale of the mystus guttatus spawning ground in the Wuxuanjiang section preliminarily estimated by the method is about 4200 ten thousand
And (4) granulating.
Example 2 estimation of Zhaoqing carp spawning site size
The Zhaoqingjiang section is the place where the traditional carp spawning sites are located, but the carp belongs to the grass-adhered spawn fishes, the statistics of the number of the adhered spawns in the spawning site is difficult to be carried out underwater, and the estimation of the size of the spawning site is difficult. The method can be used for estimating the size of the spawning site.
1) Carrying out fishery fishing investigation in 2016 months, 6 months and 10 months in the Zhaoqing river section, knowing that 90 fishing boats are distributed in the river section for professional fishing operation and 260 days for annual fishing operation, carrying out investigation statistics on 29 carps counted by 74 boat-time fishery products, and accordingly knowing that 0.4 carps are fished by a single boat; meanwhile, through anatomical analysis, the proportion P1 of the sexual mature individuals of the carps in the fish catches is 60%, wherein the proportion P2 of the female in the mature individuals is 52%, and the proportion P3 of the female with eggs laid is 24%.
2) The growth and death parameters of mystus guttatus in wuXuanjiang river were estimated, and the total death coefficient Z was 1.53 and the natural death coefficient F was 0.42, and the development rate E ═ Z-M/Z ═ 0.73 was calculated.
3) The total quantity of the water areas of the research objects in the spawning ground can be estimated according to the number N of single-boat fisheries, the number N of fishing boats, the number D of fishing operation days, the tail average weight w and the development rate E, wherein the total quantity S is N multiplied by D multiplied by N/E is 90 multiplied by 260 multiplied by 0.4 divided by 0.73 multiplied by 12822 tails.
4) Measuring and counting the average tail weight w of a female sexual mature individual to be 1480g and the relative fecundity R to be 127 grains/g;
5) the spawning site size T is S × P1 × P2 × P3 × w × R12822 × 60% × 52% × 24% × 1480 × 127 is 180462531, and the total population S of the survey subject, the proportion P1 of the number of sexually mature individuals, the proportion P1 of the number of females in the breeding population, the proportion P3 of the number of individuals who have spawned, and the relative fecundity R are estimated.
Therefore, the method can preliminarily estimate the spawning site size of the carps in the Zhaoqing river section to be about 1.8 hundred million grains.
In conclusion, the growth and death parameters of the fish population are obtained through fishery fishing investigation, the total resource amount of the research object is calculated, and the spawning ground scale of the research object can be estimated by the method by combining the relevant characteristic parameters of the population breeding organisms. The method is a simple, feasible, scientific and reliable method for estimating the scale of the spawning site of the fishes producing the clay-sinking eggs.
It should be noted that the above two embodiments are only illustrative and not restrictive, and the invention may be modified in any manner without departing from the spirit of the invention.
Claims (4)
1. A method for estimating the size of a spawning site of fishes laying muco-sinking eggs in rivers comprises the following steps:
1) carrying out fishery fishing investigation in a water area of a spawning site to obtain basic data, wherein the basic data comprises the number N of fishing boats, annual fishing operation days D and the number N of single-boat fisheries of an investigation object; meanwhile, the proportion P1 of the sexual mature individuals of the survey object in the fish catch and the proportion P2 of the females in the sexual mature individuals are obtained through anatomical analysis, and the proportion P3 of the number of the females which have spawned in the fish catch in the reproductive period in the sexual mature females is judged according to the gonadal development period;
2) estimating growth and death parameters of an investigator to obtain a total death coefficient Z and a natural death coefficient M, and further calculating a development rate E of the investigator, wherein the development rate E is (Z-M)/Z;
3) estimating the total quantity S of the surveyed objects in the water area of the spawning ground according to the number N of the single-boat fisheries, the number N of the fishing boats, the number D of fishing operation days and the development rate E, wherein the total quantity S is NxDxn/E;
4) measuring and counting the average tail weight w and the relative fecundity R of the female sexual mature individuals of the surveyed object;
5) the spawning ground size T is estimated according to the total population quantity S of the surveyed objects, the proportion P1 of the quantity of sexual maturity individuals, the proportion P2 of the quantity of females in the breeding population, the proportion P3 of the spawned individuals and the relative fecundity R, and the spawning ground size T is S multiplied by P1 multiplied by P2 multiplied by P3 multiplied by w multiplied by R.
2. The method for estimating the spawning site size of fish spawning muco and sinking eggs in rivers according to claim 1, wherein the method comprises the following steps: the investigation time period of the fishery fishing investigation in the step 1) covers three time periods of a breeding period, a fattening period and a wintering period of an investigation object.
3. The method for estimating the spawning site size of fish spawning muco and sinking eggs in rivers according to claim 1, wherein the method comprises the following steps: further, the subject is a colonizing, muco-precipitating oviparous fish.
4. The method for estimating the spawning site size of fish spawning muco and sinking eggs in rivers according to claim 1, wherein the method comprises the following steps: the number proportion P3 of the female who has spawned to the sexually mature female is obtained only by the investigation result of the breeding period, and further, the P1 and the P2 are obtained according to the investigation result of three periods of the breeding period, the fattening period and the wintering period.
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| 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 |
| CN111008794B (en) * | 2019-12-31 | 2023-04-07 | 中国水产科学研究院黑龙江水产研究所 | Multi-dimensional one-stop investigation method for spawning site of spawning fishes on large water area grass in rivers, lakes and reservoirs |
| CN114223588B (en) * | 2021-12-17 | 2022-11-15 | 水利部中国科学院水工程生态研究所 | Reservoir ecological scheduling method for guaranteeing hatching of grass-sticking fish eggs in reservoir area |
| CN115119793B (en) * | 2022-06-27 | 2023-03-14 | 中国水产科学研究院黑龙江水产研究所 | Method and device for counting spawn density of fingerlings in designated area |
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| CN101720682A (en) * | 2008-10-24 | 2010-06-09 | 中国科学院水生生物研究所 | Lake mandarin fish scale culturing method |
| US7836852B2 (en) * | 2006-12-08 | 2010-11-23 | Uwm Research Foundation, Inc. | Methods for manipulating fish spawning cycles |
| CN103270983A (en) * | 2013-05-22 | 2013-09-04 | 中国水产科学研究院长江水产研究所 | Method for constructing schizothoracinae artificial spawning site in natural river |
| CN103355250A (en) * | 2013-07-12 | 2013-10-23 | 中国水产科学研究院长江水产研究所 | Underwater video observation positioning device and spawning scale evaluation method for Chinese sturgeon spawning ground |
| CN103760834A (en) * | 2013-09-03 | 2014-04-30 | 中国农业大学 | Fishery aquaculture growth process internet-of-things monitoring system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7836852B2 (en) * | 2006-12-08 | 2010-11-23 | Uwm Research Foundation, Inc. | Methods for manipulating fish spawning cycles |
| CN101720682A (en) * | 2008-10-24 | 2010-06-09 | 中国科学院水生生物研究所 | Lake mandarin fish scale culturing method |
| CN103270983A (en) * | 2013-05-22 | 2013-09-04 | 中国水产科学研究院长江水产研究所 | Method for constructing schizothoracinae artificial spawning site in natural river |
| CN103355250A (en) * | 2013-07-12 | 2013-10-23 | 中国水产科学研究院长江水产研究所 | Underwater video observation positioning device and spawning scale evaluation method for Chinese sturgeon spawning ground |
| CN103760834A (en) * | 2013-09-03 | 2014-04-30 | 中国农业大学 | Fishery aquaculture growth process internet-of-things monitoring system |
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