According to the article “Greenback Cutthroat Trout Recovery Plan” (U.S. Fish and Wildlife Service, 1998), the number of Greenback cutthroat trout in Colorado, especially the South Platte and Arkansas River drainage, is declining. This could destroy these areas’ ecosystem and also it could bring many kinds of pollutions. Those causes made them endangered. The declining numbers of trout are due to environmental factors caused by people’s over-fishing, non-native trout species and pollutions from this area’s agriculture. A decline or extinction of a certain species would bring imbalance to nature’s ecosystem, so we should make an effort to recover those kinds of species. As we have seen in many cases, we have destroyed native species by agriculture, cultivation and industrialization. Land and water exploitation, mining, logging, and unregulated fishing all took their toll in reducing the numbers and habitat of endemic trout populations in Colorado (Greenback Cutthroat Trout, 1978). By destroying Greenback Cutthroat Trout, finally, we are all damaged from our nature. These problems are caused by people’s over-harvest, non-native trout species, pollutions and recovery plan of government in Colorado area. Therefore, people should study and research about Greenback Cutthroat Trout and protect and recover them to save Colorado’s nature species.
One of the major reasons of reduction of Greenback cutthroat trout in Colorado is people’s over-fishing: unlimited fishing makes them endangered. “Their numbers began to decline due to over fishing” (Greenback cutthroat trout, 2004). To avoid their reduction, fishermen should follow catch-and- release action. According to the Greenback Cutthroat Trout Recovery Plan, “We should prepare a long term greenback management plan and cooperate agreement.” (1998. pp.3). Nature species will never change its situation in short time. Therefore, we should keep saving nature species for long time, in this case, especially to save and restore greenback cutthroat trout in Colorado. Like some fishermen who do not bring their fish home or keep them and release right after they catch fishes, “catch-and-release” could be used to reduce and protect them from endangered situation (Catch and Release Fishing, 2004). The government of Colorado should held “catch-and-release” campaign to enforce saving greenback trout. In addition, it maintains and save greenback cutthroat trout’s environmental situation, besides, avoids its future decline. According to the book “Greenback Cutthroat Trout Recovery Plan,” it says that Greenback cutthroat trout was listed as “endangered” in 1973, and down listed to “threatened” in 1978. Finally, about 10% of the greenback cutthroat trout was increased through people’s effort. Therefore, the government of Colorado should keep encourage people to save and protect greenback cutthroat trout from over fishing.
The second major reason of reduction of greenback cutthroat trout in Colorado is an attack of non-native salmonid species, such as rainbow trout, brook trout, brown trout and Yellowstone cutthroat trout in greenback cutthroat trout’s habitat (Greenback cutthroat trout, 1998). They eat Greenback cutthroat trout’s food, and, as a result, the number of their species increased. Greenback cutthroat trout usually lives in clear streams with cover and it requires cold-water temperature for spawning in June and they should compete with other spring spawning trout for food and space (1998). So, we need to supply them enough food and space to have more fishes than other trout species. For example, in my country, a few years ago, we had a serious problem with native species frog and it was absolutely due to the huge non-native frog came from other country. So, our government encouraged people to catch non-native species to protect our native-frogs and it was very successful. As a result of this, nowadays, we only we only can see a few of non-native frogs in my country. Like this situation, greenback cutthroat trout also needs to be listed as a specially protected trout by other non-native trout like brown and Yellowstone trout, which lives in the same environment and has same food. In the article “Greenback Cutthroat Trout,” it said “Conservation efforts started in 1959, and include removal of nonnative trout from greenback habitat, reintroduction and relocation of greenbacks” (1984). Likewise, the government of Colorado should have solutions for non-native trout species problem. There are some solutions for this matter, which are separating greenback trout form other nonnative species and feed separately, removing nonnative trout from greenback trout, and making greenback trout have more fishes. In addition, for example, there could be hatching ponds only for greenback cutthroat trout’s spawning, just like cultivation.
Another problem of decline greenback cutthroat trout is caused by pollutions from agriculture, cultivation and industrialization. In “Division of Wildlife in Colorado,” it says “Their numbers began to decline due to logging, livestock over-gazing, water diversions and municipal and industrial pollution.”(2004) Industrial development has made a lot of problems until now and this was the one of reason of endangered greenback cutthroat trout. In the Colorado area, Industrial pollution also made serious problems, such as increasing nitrogen in the air and water which could make nitrogen rain. And, it brought bad result for greenback cutthroat trout’s living and habitat. Although we already know this problem, people reacted very slowly and did not pay attention carefully than other major problems. Since greenback cutthroat trout have cold water spawning habitat, they need about 5-8。C of water temperature. Therefore, increase of water temperature caused by global warming has made their numbers decline. To keep their spawning habitat, people need more serious recovery plan about pollution problem, such as drainage cleaning system, keep researching about status of the trout’s environment and clean-water campaign.
There have been a lot of efforts from the government of Colorado to recover Greenback cutthroat trout’s nature environment. They have “The Greenback Cutthroat Trout Recovery Plan” from the government of Colorado (1998). According to them, the goal of their plan is to restore the greenback cutthroat trout to non-threatened status within its native range. In the book of Greenback cutthroat trout, it says “As a result of recovery efforts, captive bloodstocks were established, non-native trout were removed from suitable habitat, greenbacks were reintroduced, stable populations were developed and catch-and-release fisheries were initiated”(1998). As we can see above, the recovery plan of the government was somewhat successful, but it still need more efforts. Their recovery team also set up stream improvement projects and a hatchery-based restoration stocking program. According to the article “Greenback cutthroat trout,” they say that 20 stable populations of pure greenback cutthroat trout must be exist within its range with at least 5 populations existing in the Arkansas River drainage, in order for delisting to be considered. So, there should be needed more efforts for their recovery, like maintain existing greenback’s populations, establish 20 stable populations, conduct greenback recovery education and prepare a long-term greenback management plan.
Finally, reduction of number of greenback cutthroat trout in Colorado is not only a problem for greenback cutthroat trout, but also a problem of other endangered number of nature species. As I mentioned above about major three reasons of decline greenbacks, which are people’s over-harvest, non-native trout species and pollutions, I really agree with that those three things are causes of decline greenback cutthroat trout. We need to stop these happening and have to look carefully which way would be the safest and the best. Someday, the number of greenback cutthroat trout will be increased and it certainly depends on how the governments of Colorado will effort and how people react for this matter. Saving our nature species is very important issue and on of the biggest problem of us. People should remind that saving the nature species just like Greenback cutthroat trout in Colorado is not only for us, but also for our descendants.
References:
Greenback Cutthroat Trout Recovery Team (1998). Greenback cutthroat trout recovery plan. Denver, Colorado: U.S. Fish and Wildlife Service
Government Report (1998). Greenback Cutthroat Trout http://ecos.fws.gov/docs/life_histories/E00F.html
Government Report (2004). Greenback Cutthroat Trout. Denver, Colordo: Colorado Division of Wildlife
Rocky Mountain News. (May.2005). Colorado’s Top 2005 Fishing.
http://www.midcurrent.com/news/archives/001787.html
The Incredible Journey of the Greenback Cutthroat (April. 2004). Catch and Release Fishing. Colorado