Effect of salinity on the reproduction efficiency of pike perch and roach in the Kurchansky Liman (Temryuk District, Krasnodar Krai)
Since 2017, the period of salinization of the Azov Sea has significantly affected the life processes of the fish in the Azov brackish lagoons. Results of observations in the Kurchansky Liman (Temryuk District, Krasnodar Krai) are presented, which allow to evaluate the role of salinity in formation of the current reproduction level of semi-migratory pike perch and roach in the investigated reproductive water body. The studies were carried out during spring season of 2017 and 2018. Ichthyological data were collected at 32 stations. Altogether, during the 2-year studies, 64 fishing operations were performed in the brackish lagoons of Temryuk District, and 101 specimens of pike perch juveniles and 1,900 specimens of roach juveniles were analyzed. It is shown how the abundance of pike perch and roach juveniles in the catches changes depending on the changes in the water salinity of the investigated water body, as compared to the other brackish lagoons in this region, where salinity is lower. On the basis of the obtained material and literature data, it is stated that the spawning grounds of pike perch and roach in Krasnodar Krai depend mostly on the level of salinity, which regulates the reproductive efficiency of these species.
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Contribution biblioteca |
| Language: | Russian |
| Published: |
2018
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| Subjects: | Brackish lagoons, Salinity effects, Pike perch, Roach, Fishery data, Juveniles, Abundance, Reproduction, Spawning sites, |
| Online Access: | http://hdl.handle.net/1834/14950 |
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| Summary: | Since 2017, the period of salinization of the Azov Sea has significantly affected the life processes of the fish in the Azov brackish lagoons. Results of observations in the Kurchansky Liman (Temryuk District,
Krasnodar Krai) are presented, which allow to evaluate the role of salinity in formation of the current reproduction level of semi-migratory pike perch and roach in the investigated reproductive water body. The studies were carried out during spring season of 2017 and 2018. Ichthyological data were collected at 32 stations. Altogether, during the 2-year studies, 64 fishing operations were performed in the brackish lagoons of Temryuk District, and 101 specimens of pike perch juveniles and 1,900 specimens of roach juveniles were analyzed. It is shown how the abundance of pike perch and roach juveniles in the catches changes depending on the changes in the water salinity of the investigated water body, as compared to the other brackish lagoons in this region, where salinity is lower. On the basis of the obtained material and literature data, it is stated that the spawning grounds of pike perch and roach in Krasnodar Krai depend mostly on the level of salinity, which regulates the reproductive efficiency of these species. |
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