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Extinction of Species Writing Assignment - The Hawaiian Hoary Bat.

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Extinction of Species Writing Assignment - The Hawaiian Hoary Bat By: Laura Gintz July 10, 2003 Question One There are many reasons that the Hawaiian hoary bat (Lasiurus cinereus semotus) should be funded for recovery efforts. One is that it is the only native land mammal in Hawaii, and therefore it is the only bat in Hawaii. Hawaii would have no native land mammals left if this animal were to go extinct, so recovery efforts must be funded to preserve biodiversity in Hawaii. Hawaii has already lost about three-fourths of its original bird species and over one-third of its native plants are endangered (Fullard 1989), so the remaining biodiversity in Hawaii must be preserved. This subspecies of the Hawaiian hoary bat may even have been isolated long enough to adapt and become its own species. Lasiurus cinereus semotus may be different enough from Lasiurus cinereus cinereus at the species level to be designated as a different species. However, this study has not yet been formally reported, so it will continue to be considered a subspecies until the study is confirmed (Tomich 1986a). This study will not be able to be confirmed if the species becomes extinct, so funding should go to recovery efforts of the bat. The Hawaiian hoary bat also may contribute to insect control in agricultural areas, like the sugarcane leaf hopper. Loss of crops to insects is of large concern because it costs the industry billions of dollars each year. The bat also been controls other pests like the damp wood termite and some swarming species (Fullard 1989).. ...read more.


After the specific roosting sites are identified, they should be protected from degradation and disturbance. This could possibly include fencing of the units to protect them from domestic and feral ungulate and also the development of conservation agreements designed to restrict development activities and preserve the habitats. Restoration of native habitat could also be done to help solve the problem of habitat loss (USFWS 1998). Predation (an ultimate threat) could also be a threat to this bat because it is vulnerable to cats, rats, the introduced common barn-owl, the native short-eared owl, and the native Hawaiian hawk. The mammalian predators could be controlled around the roosting sites by using live traps, snap traps, and rodenticides. Methods to control the bird predators would also have to be developed, but they would have to be implemented carefully because the Hawaiian hawk is an endangered species (USFWS 1998). The ultimate pesticide threat could also be combated. If they are found to affect the bat subspecies, then they could be mitigated through techniques coordinated by the Hawaii Department of Agriculture, U.S. Department of Agriculture, and Environmental Protection Agency (USFWS 1998). Some of the human-caused problems could also be solved. A public education program could be instituted to inform the residents of the needs of the bat, and an informed public may also be more interested in the conservation of the Hawaiian hoary bat. The educational program could inform the public of the benefits of having the bat in the Hawaii. Question Four The recovery goals for this species, as listed in the Recovery Plan, are as follows: 1. ...read more.


of the organism is prohibited. Government agencies are also prohibited from engaging in any actions that would harm the species or its habitat. And, critical habitat (areas on which are found those physical or biological features essential to the conservation of the species and which may require special management consideration or protection) can be designated for the species. The Hawaiian hoary bat is considered endangered in the United States. And, I believe this is reasonable because the numbers of the species in the wild has been reduced from that of historic times, it is an indicator specials, and it may even be its own full species according to some studies. IUCN (The Would Conservation Union) creates the Red List of Threatened Species by assessing the conservation status of species, subspecies, varieties and distinct populations globally. Then, once the risk of extinction is determined, the IUCN Red List catalogues and highlights taxa that are facing global extinction (listed as Critically Endangered, Endangered, or Vulnerable), taxa that are Extinct or Extinct in the Wild, taxa that there is insufficient information for and cannot be evaluated (Data Deficient), and taxa that are close to meeting threatened thresholds or that would be threatened if current conservation programs were underway (Near Threatened). These species are highlighted in order to promote their conservation (IUCN 2003). The criteria evaluated are the following: population size, geographic range, number of mature individuals, rate of extinction, and amount of available data. Currently, the Hawaiian hoary bat is not on the IUCN Red List. I believe that it should be considered data deficient because there is not enough information to accurately evaluate it would these criteria, but it is likely that if more research were to be conducted, then the bat could be listed as threatened. ...read more.

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