ANS18-10-L13-TROUT-CULT

ANS18-10-L13-TROUT-CULT - Sturgeon Production 2008 FAO...

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Sturgeon Production – 2008 FAO 900 mt ? Fishery 25,600 mt Total 200 mt Others 100 mt France 200 mt German y 200 mt Spain 300 mt Poland 800 mt Italy 2,400 mt Russia 21,400 mt China Aquaculture
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White sturgeon aquaculture http://www.sterlingcaviar.com/http://www.sterlingcaviar.com/ (an example of a CA sturgeon farm)
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Age at first maturity: cultured sturgeon (warm water) grow and mature faster than wild sturgeon Age yr W kg Wild Farmed Both Males 10 - 14 3 - 4 ~ 15 kg Females 18 - 22 7 - 8 ~ 35 kg
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Sturgeon farming
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Sturgeon Shark ( M ü llerian duct) Important Difference in the Reproductive System of Teleosts (modern fish) and Cartilaginous Fish such as Stugeon and Sharks Teleost
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Gonads and ducts of mature sturgeon Female Naked ovaries: lateral side opens into abdominal cavity M ü llerian duct: blue arrow Eggs ovulate into abdominal cavity, transported via M ü mesonephric duct (green arrow) Male M ü llerian duct is present (blue arrow) but its function unknown Sperm transported by efferent ducts (red arrow) and Wolffian (green arrow) duct. Note M ü llerian duct funnel (blue arrow) testis ovary
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Mullerian duct of sturgeon (Wrobel 2003) g ovary; M M ü llerian duct funnel, heavily ciliated Low magnification High magnification
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Biennial ovarian cycle in sturgeon: longest phase is a vitellogenesis Maturation
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Hormonal induction of ovulation using the PI (polarization index) Hormonal induction of ovulation using the PI (polarization index)
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ANS18-10-L13-TROUT-CULT - Sturgeon Production 2008 FAO...

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