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首页> 外文期刊>Russian journal of marine biology >The Characteristics of the Amur Sturgeon, Acipenser schrenckii, Spawners from a Warm-Water Cage Farm during Long-Term Exploitation
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The Characteristics of the Amur Sturgeon, Acipenser schrenckii, Spawners from a Warm-Water Cage Farm during Long-Term Exploitation

机译：长期开采温水网箱养殖场中A鱼，中华,、虾的特征

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摘要

The cultivation, biological, and production parameters of domesticated Amur sturgeon spawners of age 8 to 24 years from a warm-water cage farm are described. Female Amur sturgeons of three generations, bred from native spawners in cages, reach first maturity at ages of 8-10 years; males reach first maturity at ages of 6-7 years. Females have a larger body weight, length, girth, and fatness than those of males in all the age groups from 8 to 24 years. Males produce 40-350 mL of high-quality milt per one stripping session; first-maturing females produce 0.7-2.3 kg of roe. Most females (75%) spawn annually or biennially. Some females at ages of 17-23 years can produce a maximum of 7.0-10.5 kg of roe. The mean amount of roe collected from one female at ages of 8-24 is 3.82 kg, with a fecundity of 200000 eggs (a maximum of 520000 eggs), a relative working fecundity of 7500 eggs/kg (maximum 13500 eggs/kg), and an oosomatic index of 14.5% (maximum 24.5%). During six to eight spawning seasons, an average of 22-31 kg of roe was obtained from the females of age 21 and 24 years, which accounts for 90-98% of their body weight. In 27% of the females, the amount of roe was 29-43 kg, or 103.0-137.5% of their body weight. The females adapt well to technological operations. Their survival rate for the period of exploitation is 65%.
机译：描述了从温水网箱养殖场养殖的8至24岁的驯养阿穆尔A鱼产卵器的养殖，生物学和生产参数。从笼中的原生产卵犬繁殖的三代雌性东北mur，在8-10岁时首次成熟。男性在6-7岁时达到首次成熟。在8至24岁的所有年龄段中，女性的体重，长度，周长和脂肪均大于男性。每次剥皮过程，雄性都会产生40-350 mL的优质鱼鳞。初熟的雌鱼产生0.7-2.3公斤的鱼卵。大多数雌性动物（75％）每年或每两年产卵一次。 17-23岁的某些雌性最多可产生7.0-10.5千克的鱼卵。从8岁至24岁的一位雌性采集的平均鱼卵为3.82千克，繁殖力为200000卵（最多520000卵），相对工作繁殖力为7500卵/千克（最大13500卵/千克），渗透指数为14.5％（最高24.5％）。在六到八个产卵季节，从21岁和24岁的雌性身上平均获得了22-31千克的鱼卵，占其体重的90-98％。在27％的雌性中，e子的量为29-43千克，或体重的103.0-137.5％。雌性非常适应技术操作。他们在剥削期间的存活率为65％。

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