The Content of Cations in Vertebrae of Roach Depending on the Degree of its Gonads Maturity
2017
Mavrin, A.S. | Martemyanov, V.I.
It is shown that in roach Rutilus rutilus from the Ild River (Volga reach of the Rybinsk Reservoir) sodium, potassium, magnesium, and calcium concentrations in vertebrae of juvenile individuals (juv) make up 36.8±1.4, 14.0±0.8, 97.1±2.2, 1530±44 mmol/kg wet weight of bone tissue respectively. The content of sodium in vertebrae of juvenile (♀juv) and mature (♀IV) female roach amounts to 39.3±1.6, 43.5±1.8, potassium — 20.8±0.6, 24.9±1.0, magnesium — 61.6±0.6, 65.5±0.5, calcium — 1252±17, 1316±15 mmol/kg wet weight of bone tissue respectively. In vertebrae of juvenile (♂juv) and mature (♂IV) male roach the content of sodium makes up — 45.1±3.0, 52.9±3.1, potassium — 18.7±0.7, 19.6±0.6, magnesium — 94.0±1.6, 76.6±3.6, calcium — 1628±23, 1520±78 mmol/kg wet weight of bone tissue respectively. In the row — juvenile (juv), juvenile with anatomical differentiation of gonads by sex (♂juv, ♀juv), mature males and females (♂IV, ♀IV) — the concentration of Na and K ions in vertebrae increases. The Ca content in vertebrae of mature females (♀IV), as well as Mg concentration in mature fish of both sexes (♀IV, ♂IV) is less than in juvenile fish (juv).
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