AID TO IDENTIFICATION: The range of the white sturgeon does not overlap that of the pallid and shovelnose sturgeon. The White Sturgeon is the largest of all freshwater fish in North America. The larger 1-year-old sturgeon the sturgeon is approximately 10 cm in length. The average weights and lengths of sturgeons at the end of the trial were 406 ± 96 g and 55.4 ± 4.4 cm. When relative U crit values (in body lengths per second) of other sturgeon species were plotted with the green and white sturgeon allometric curves, both larval green and larval white sturgeon <20 cm in length appeared to have greater U crit (in body lengths per second) than those of other sturgeon species of the same size (Fig. It is made mostly of cartilage but it is still classified as a bony fish.

The average White Sturgeon captured in the Delta in recent years is approximately 109 cm. -Fork length FIGURE 1.—White sturgeon illustration indicating measurements of total length and fork length and location of calcified structures used for age estimation. Reaching 6 m in length, 635 kg in weight and over 100 years in age, this is the largest freshwater fish in Canada. White sturgeon eat fish, crustaceans, mollusks, worms, and plant material. The torpedo-shaped White Sturgeon has no scales. White Sturgeon are the largest freshwater fish in North America. Females mature when they are 12-16 years old and have a fork length of 95-135 cm. White sturgeon don’t necessarily breed annually and only a small percentage of the adult population spawn in a given season. This difference disappeared in sturgeons >20 cm in length. As with all Acipenserids, White Sturgeon are long-lived. White Sturgeon Facts and Information Acipenser transmontanus Introduction to White Sturgeon. 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. Early life stages of white sturgeon are highly sensitive to environmental variables such as water temperature, dissolved oxygen, sunlight, river flow, and salinity (Table 1). They seem to be very similar to the fossil remains that date back more than 175 million years ago. Armoured relics from the past, sturgeon have remained rela- tively unchanged in structure for millions of years. White sturgeon are long-lived, late-maturing diadromous fishes found in estuaries and major rivers along the west coast of North America. 3A). Typically males are at least 10-12 years old and have a fork length of 75-105 cm. At the end of their first year of life, juvenile white sturgeon are between 15 and 30 cm in length. At this size, a juvenile white sturgeon is able to swim well and is actively feeding on a range of small prey items.


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