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- W1569345741 abstract "Juvenile paddlefish (Polyodon spathula) hatched in 1988 have been cultivated in ponds up to sexual maturity (age 11+) in Moldavia, located in central European Plain with an altitude ranging from 429.5 m to 147 m. The average annual air temperature is 9.5–10 °C and the growing season for pond fish is 180 to 210 days. The first summer the fish were reared under either mono- or polyculture conditions starting at an initial stocking density of 10000 and 5000 fish ha–1. By the autumn the individual weights were 72 and 139 g and the survival rate 48 and 63%, respectively. In subsequent years the paddlefish were associated in ponds with various sturgeon species. A polyculture experiment associating the sturgeon, Acipenser baeri (density 4300 ind. ha–1) and paddlefish (density of 8300 ind. ha–1) yielded respectively 59% survival and 432 kg ha–1 productivity for Polyodon and 77% survival and 174 kg ha–1 productivity for A. baeri. By the third year (2+) the paddlefish reached average weight of 1.5–2.5 kg and their final survival and productivity values were 50–70% and 150–463 kg ha–1, respectively. Males (6–7 kg ) matured at the age of 5+– 6+. Females reached sub-final stage IV at the age of 11+ (30%) or 12+ (70%) and a weight of 10–16 kg with spawning and production of viable fry. Caviar was made from the roe of these females. In 1+–3+ aged fish, the proportion of flesh and skin was stable at 54–57% while the proportion of head decreased from 44% at 0+ to 26% at 3+." @default.
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- W1569345741 date "2002-11-01" @default.
- W1569345741 modified "2023-10-09" @default.
- W1569345741 doi "https://doi.org/10.1002/1522-2632(200211)87:5/6<553::aid-iroh553>3.0.co;2-s" @default.
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