While downstream passage of sturgeon through the dams has been reported, the route of passage was never identified. At sexual maturity, A. transmontanus can reach 1.6 m (5.2 ft) in length, while the maximum length recorded of any age class is 6.1 m (20 ft), with common lengths around 2.1 m (6.9 ft). Line: 20-40lb. Hatching time is temperature dependent, and can range from 3–13 days. LIS8040C 8' One-Piece. 277–293. Sturgeon Length/Age/Weight Chart The white, Oregon, or Sacramento sturgeon (A. transmontanus) occurs on the Pacific coast and is the largest of the North American sturgeons, weighing up to 820 kg (1,800 pounds). chart  Recent genetic analysis supports a close relationship between (A. transmontanus) and (A. schrenckii), which is only found in Asia, showing a common ancestor between the two around 45.8 million years ago. WHITE STURGEON WEIGHT/AGE CHART LENGTH (Ft.) 3’1” … The following chart was supplied courtesy of B. C. Frasier River White Sturgeon study program Read across the page White Sturgeon are the largest freshwater fish in North America. The white sturgeon is part of a Pacific clade of species including Kaluga (Huso dauricus), Sakhalin (Acipenser mikadoi), Green (Acipenser medirostris), Chinese (Acipenser sinensis) and Amur (Acipenser schrenkii) Sturgeon. The white sturgeon can reach 1,800 lb (800 kg) in weight and up to 20.1 ft (6.1 m) in length, and live for over 100 years. White sturgeon in the Fraser are known to follow sockeye runs and also feed on eulachon, sculpins and stickleback. , White sturgeon are a resource to a variety of different social and economic groups around the world. (, [Muir, W. D., McCabe, G. J., Parsley, M. J., & Hinton, S. A. They are creatures of large rivers and are uniquely adapted for life on the bottom. The American Fisheries Society considers them to be Endangered. There are historical records of fish as large as 610 cm, although it is now rare to encounter fish larger than 200 cm in Californian waters. White sturgeon are iteroparous breeders with blank into river systems in the late fall and winter, spawning occurring in the spring months. 2001). There are historical records of fish as large as 610 cm, although it is now rare to encounter fish larger than 200 cm in Californian waters.  Besides their meat, other important economic products associated with caught sturgeon are caviar, isinglass, and oil. , Larval white sturgeon 10–11 mm (0.033–0.036 ft) in TL experience the highest mortality when they transition from endogenous to exogenous feeding, around 8–14 days post-hatch depending on conditions. Barbels are situated anterior to the mouth, closer to the snout than the mouth.  Adults greater than 600 mm (2.0 ft) consume a variety prey species, adjusting to a piscivorous diet of herring, shad, starry flounder, and goby, as well as benthic items such as invasive overbite clam. Northwest Science, 74(1), 25-33], [Israel, J., Drauch, A., Gingras, M. (2009). White sturgeon are commonly found in deep, soft bottomed areas of estuaries, where movements in the water column is dependent on salinity. A. transmontanus is distinguished by the two rows of four to eight ganoid bony plates between the anus and anal fin, with about 45 rays present in the dorsal fin. Historically, sturgeon up to 1,500 pounds were caught by anglers. The information in this chart has been compiled through various resources, including the BC Fraser River White Sturgeon study program. Actes du premier colloque international sur l’esturgeon. White Sturgeon Facts and Information Acipenser transmontanus Introduction to White Sturgeon. Coloring can range from gray to brownish on the dorsal side, paler on the ventral side, and gray fins. White sturgeon is the largest freshwater fish in North America and is the third largest species of sturgeon, after the Beluga and the Kaluga. For example: the average weight for a 55 inch long Lake Sturgeon with a 25 inch girth is 48 pounds. The lake, or rock, sturgeon (A. fulvescens) of North America occurs in the Mississippi River valley, Great Lakes, and Canada and may weigh more than 90 kg (200 pounds). Extant sturgeon species are polyploid, containing more than two paired sets of chromosomes, derived from an extinct ancestor containing 60 chromosomes. (n.d.).  When eggs are released by the female, they are negatively buoyant, and develop an adhesive coat upon contact with water, which allows them to attach to the substrate near where they were spawned. The white, Oregon, or Sacramento sturgeon (A. transmontanus) occurs on the Pacific coast and is the largest of the North American sturgeons, weighing up to 820 kg (1,800 pounds). However, some are landlocked in the Columbia River Drainage, Montana, and Lake Shasta in California, with reported sightings in northern Baja California, Mexico.. Studies have shown that dietary lipid requirements on larval white sturgeon effect overall body composition, plasma biochemical parameters and liver fatty acids.  The Convention on International Trade in Endangered Species (CITES) of Wild Fauna and Flora has white sturgeon listed as Appendix II, which includes species not necessarily threatened with extinction, but in which trade must be controlled to avoid utilization incompatible with their survival. Wildlife could play a key role in the survival of larval and YOY white sturgeon in the Columbia River and could possibly explain the apparent poor survival of larvae and YOY in some Snake and Columbia River reservoirs that apparently have successful spawning but poor recruitment. Chapman, Van Enennaam and Doroshov witnessed sexually mature females 950 mm (3.12 ft) FL in the Sacramento-San Joaquin River system estimated around 9 years old by using the Von Bertalannfy growth function, while the youngest sexual mature was a male 750 mm (2.46 ft) FL estimated to be six years old.
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