On the use of biological resources of the salt water reservoirs of Stavropol Krai
Studies have been carried out to identify potential fishery species in two internal water bodies of Stavropol Krai, Russia (Bolshoe Medvezhenskoe and Maloe Medvezhenskoe reservoirs), and to determine taxonomic and quantitative composition of the commercial aquatic organisms. Representatives of zooplankton communities in the investigated water bodies are cladocera, copepods, crustaceans and rotifers. In terms of abundance and biomass, Diaptomus salinus, which is a potentially commercial species, occupies the leading position in those two water bodies. Diptera larvae of the family Chironomidae (non-biting midges) are of the highest abundance and biomass in the benthos. High abundance and biomass values of D. salinus and peculiarities of their age structure in the studied water bodies indicate a significant level of reproductive potential of the population and the ability of copepods to recover quickly after harvesting. The commercial stocks of both Bolshoe Medvezhenskoe and Maloe Medvezhenskoe were estimated as 3,450 kg and 7,478 kg. Without any negative effects, it is possible to withdraw not less than 40 % of the stock that makes up 1.4 t and 3.0 t, respectively. Taking into account the number and biomass of plankton crustaceans and the reproduction efficiency of their populations in both water bodies, the commercial fishery will not cause any additional damage to the stocks of the aquatic biological resources but enable the increase of the legalization level of catches and reduce the level of unreported fishing.
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Contribution biblioteca |
| Language: | Russian |
| Published: |
2018
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| Subjects: | Diaptomus salinus, Taxonomy, Species composition, Stock assessment, Biomass, Plankton, Freshwater crustaceans, Aquatic living resources, Unreported fisheries, Reproduction, Copepoda, Cladocera, Chironomida, |
| Online Access: | http://hdl.handle.net/1834/14948 |
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