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Der heutige Zustand die Population des Herings (Alosa

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Kaliningrad State Technical University
Anuryeva Anna
October, 2013
1
Whitefish (Coregonus lavaretus L.)
2
Whitefish in Kaliningrad region
Curonian lagoon
Vystitys lake
3
2010
2008
2006
2004
2002
2000
1998
1996
1994
1992
1990
1988
1986
1984
1982
1980
1978
1976
1974
1972
1970
1968
1966
1964
1962
1960
Catches, tons
Trade of whitefish in the Lake Vystitys
5
4
3
2
1
0
Years
4
The aim of my work
the development of the scientific approach to management
of whitefish stock in the lakes of the southeast Baltic
5
Ecological approach
It allows
- to understand significance of the interaction between
fishery and ecosystem components,
- to obtain data about the influence of fishery on biological
recourses, feed base, food chains and biological diversity,
- to improve management instruments,
- to participate different specialists in researches.
6
The tasks
-Analysis of the current conditions of the population;
-Analysis of biological parameters of the population
(growth rate, feed composition, fecundity, parasitology,
genetic etc.);
- Evaluation of the present ecological conditions of the
lake;
- Development of ecological approach to rational using of
the stock.
7
The methods of the investigation
Biological analysis (measuring of length, weight, determination of sex ).
Biometric analysis.
Determination of age.
Parasitology analysis.
Genetic analysis.
Structural analysis of catches and building of commercial models
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The methods of the investigation
9
Results
Parasitology
30.0%
25.7%
25.0%
20.0%
20.0%
14.3%
14.3%
15.0%
11.4%
10.0%
5.7%
5.0%
2.9%
0.0%
Cestoda indet.
Nematoda indet. Protocephalus spp. Trianiphorus sp. Contracaecum spp.
Darm
Pylorus
Number of parasites
10
Results
Genetic
Network of Haplotypes by cytb-primer
from Genbank data and from experiment
11
Results
The example of the commercial model
70-80
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60-70
8
7
SSB 50%
6
5
4
3
0.02
0.06
0.10
0.14
0.18
0.22
0.26
0.30
0.34
0.38
0.42
0.46
Age of the 1st catch
10
50-60
40-50
30-40
20-30
10-20
0-10
0.50
Commertial mortality (F, 1/year)
12
Expected results
- Data about present conditions of the stock in the Baltic region;
- Data about food reserve of whitefish subject to type of water bodies;
- Data about ecological conditions of studying water bodies;
- Data about parasitology structure;
- Data about genetic structure;
- Plan of perspectives of using whitefish in Kaliningrad region.
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