Internet Explorer lacks support for the features of this website.  Without the threat of predation, salmon that breed early in the season live longer than those that breed late in the season. Insects are part of their diets at the juvenile stage. Sockeye is one of the smaller species of Pacific salmon, measuring 1.5 to 2.5 feet in length and weighing 4 to 15 pounds. Isaac can Duynen, Wikimedia commons First thing is, we have to be clear what we are talking about. The reasons for this (former) decline remain speculative. The final projected escapement (fish which were not caught) was 15,852,990 fish.. Sockeye is an exception to 2010's forecast resurgence of Oregonian fish stocks. Credit: North Carolina Sea Grant/Vanda Lewis. That represented a decline from the recent (1993) historical cycle peak of 23,631,000 Reproductive success in females is determined by the number of eggs she lays, her body size, and the survival of the eggs, which is due in part to the quality of the nest environment. Record numbers of a once-waning population of sockeye salmon have been returning to the Northwest's Columbia Basin (as of June 2012), with thousands more crossing the river's dams in a single day than the total numbers seen in some previous years.. Gustafson, R.G., T.C. They can grow up to 84 cm (2 ft 9 in) in length and weigh 2.3 to 7 kg (5–15 lb). Spawning males develop a humped back and hooked jaws filled with tiny, visible teeth. Nearby dominant males from other redds will also do this.  In fact, studies show that the Sockeye salmon with the largest bodies are most susceptible to stranding mortality. Females will spawn in 3–5 redds over a period of several days. Removal and modification of dams that obstruct salmon migration. Sockeye salmon live in Pacific waters off the northwest coasts of North America and Canada. The eggs usually hatch within six to nine weeks and the fry typically rear in lakes before migrating to the ocean. Snout size also increases in females, but hump height and adipose fin length do not increase. As an early indication of the unexpectedly high sockeye run in 2010, on July 2, 2010, the United States Army Corps of Engineers reported over 300,000 sockeye had passed over Bonneville Dam on the Columbia River.  Reproduction in the sockeye salmon has to be accomplished with the energy stores brought to the spawning grounds. Waknitz, L.T. , The total registered fisheries harvest of the sockeye in 2010 was some 170,000 tonnes, of which 115,000 tonnes were from the United States and the rest was equally divided between Canada and Russia. After the low returns, the Government of Canada launched a formal inquiry into the decline, the Commission of Inquiry into the Decline of Sockeye Salmon in the Fraser River. Their diet consists primarily of zooplankton. We are proud to offer the highest quality Sockeye Salmon at the lowest prices available. Females select spawning sites, dig nests (redds) with their tails, and deposit eggs (between 2,000 and 4,500) in the redds. If they waste too much energy, they might not be able to spawn. Learn about the threats facing salmon and what you can do to help.  Oncorhynchus comes from the Greek ὄγκος (onkos) meaning "barb", and ῥύγχος (rhynchos) meaning "snout". Other sockeye populations in the upper Columbia River and in Puget Sound are not listed under the Act. Spawning Kokanee salmon in the Sawtooth Range of Idaho, Female (top) and male (bottom) in spawning colors, CS1 maint: multiple names: authors list (. Recent unpredictable fluctuations in runs are speculated to be due to changing water temperatures. All Seafood is Wild Caught by small-scale family fishermen.  Aggressive interactions between females only last one or two charges and/or chases. 1997.  They also tend to feed on small aquatic organisms such as shrimp.