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- W2064753043 abstract "Seasonal changes in ovaries and testes of the pike, sampled in the Danube (at 1163 and 1175 km) were analysed in this research. According to the presence of developing and resting oocytes in histological sections of pike ovaries sampled during August, it is possible to determine which female will be sexually mature the following spring. Active vitellogenesis starts in September (with oocyte diameters of 514 ± 54 μm and 453 ± 68 μm, at the upstream and downstream locality, respectively), at which time the differences between the developing and resting oocytes are even more obvious. Active spermatogenesis starts in September and lasts for 2 months, and by November primarily spermatozoa can be seen in histological sections. The reproductive score points to differences in samples from the two localities that can be explained by the differing characteristics of the habitat. Values of absolute fecundity (AF) ranged from 524 to 123 896 eggs, and the mean value of relative fecundity (RF) was 40.4 ± 12.5." @default.
- W2064753043 created "2016-06-24" @default.
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- W2064753043 date "2002-02-01" @default.
- W2064753043 modified "2023-09-27" @default.
- W2064753043 title "Seasonal reproductive cycle of pike, Esox lucius L., from the River Danube" @default.
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- W2064753043 doi "https://doi.org/10.1046/j.1439-0426.2002.00285.x" @default.
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