There are several species of salmon in the Pacific Northwest including Chinook, sockeye, Coho, and chum. In the area, 52 populations have been identified. Of these populations, 26 are considered endangered or threatened under the threaten Species Act (Pure Salmon Campaign).
Many of the remaining populations are in decline and at risk for becoming endangered. Some populations have in fact already become extinct. One speculate estimates that 29% of historical populations of these fish have been lost since Euro-American shock with the Pacific Northwest around 1800 (Gustafson, et al., 2007). Despite these losses, the salmon befool has more than doubled in the past 15 years from less than 800,000 pounds to over 1.8 million globally (Naylor, Eagle, & Smith, 2003). The highest losses in population appear to be due to habitat degradation in the river areas. The Columbia River area used to be home to 11 to 15 million salmon, but now that number has decreased by 90% (Castro &...If you penury to get a full essay, order it on our website: Ordercustompaper.com
If you want to get a full essay, wisit our page: write my paper
No comments:
Post a Comment