غير معنونة
(
الإنجليزية
)
المقدمة من Animal Diversity Web
The snail darter has become a symbol for conservationists and anti-environmentalists alike. Eventually, an act was passed by Congress requiring completion of the Tellico Dam. The act went on record as being the first offical U.S. government decision to extirpate a species. Only because of a successful transplant by the Fish and Wildlife Service does the snail darter still exist. The animal is a reminder of the relative importance of conserving biodiversity compared to development in the eyes of the United States government.
- ترخيص
- cc-by-nc-sa-3.0
- حقوق النشر
- The Regents of the University of Michigan and its licensors
- الاقتباس الببليوغرافي
- Hall, N. 1999. "Percina tanasi" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Percina_tanasi.html
- مؤلف
- Noah Hall, University of Michigan-Ann Arbor
Behavior
(
الإنجليزية
)
المقدمة من Animal Diversity Web
Perception Channels: tactile ; chemical
- ترخيص
- cc-by-nc-sa-3.0
- حقوق النشر
- The Regents of the University of Michigan and its licensors
- الاقتباس الببليوغرافي
- Hall, N. 1999. "Percina tanasi" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Percina_tanasi.html
- مؤلف
- Noah Hall, University of Michigan-Ann Arbor
Conservation Status
(
الإنجليزية
)
المقدمة من Animal Diversity Web
Originally classified as Endangered on October 9, 1975.
Reclassified as Threatened on July 5, 1984. A number of new populations have been found, increasing the number of known individuals.
IUCN Red List of Threatened Species: vulnerable
- ترخيص
- cc-by-nc-sa-3.0
- حقوق النشر
- The Regents of the University of Michigan and its licensors
- الاقتباس الببليوغرافي
- Hall, N. 1999. "Percina tanasi" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Percina_tanasi.html
- مؤلف
- Noah Hall, University of Michigan-Ann Arbor
Benefits
(
الإنجليزية
)
المقدمة من Animal Diversity Web
The snail darter case caused the Tellico Dam project to be halted. In response, Congress amended the Endangered Species Act to include a "God Squad", which could overrule protecting a species under enormous economic sacrifice. The committee got its name because it can play "God" and allow species to go extinct for economic reasons.
- ترخيص
- cc-by-nc-sa-3.0
- حقوق النشر
- The Regents of the University of Michigan and its licensors
- الاقتباس الببليوغرافي
- Hall, N. 1999. "Percina tanasi" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Percina_tanasi.html
- مؤلف
- Noah Hall, University of Michigan-Ann Arbor
Benefits
(
الإنجليزية
)
المقدمة من Animal Diversity Web
By traditional economics, the snail darter has no significant positive economic importance. However, when listed as an Endangered Species in 1975, it was the focus of a Supreme Court case that set the precedent for protecting endangered species, regardless of cost.
- ترخيص
- cc-by-nc-sa-3.0
- حقوق النشر
- The Regents of the University of Michigan and its licensors
- الاقتباس الببليوغرافي
- Hall, N. 1999. "Percina tanasi" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Percina_tanasi.html
- مؤلف
- Noah Hall, University of Michigan-Ann Arbor
Trophic Strategy
(
الإنجليزية
)
المقدمة من Animal Diversity Web
The snail darter eats small invertebrates, with aquatic snails making up about 60 percent of the darter's food, with some variation among seasons.
- ترخيص
- cc-by-nc-sa-3.0
- حقوق النشر
- The Regents of the University of Michigan and its licensors
- الاقتباس الببليوغرافي
- Hall, N. 1999. "Percina tanasi" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Percina_tanasi.html
- مؤلف
- Noah Hall, University of Michigan-Ann Arbor
Distribution
(
الإنجليزية
)
المقدمة من Animal Diversity Web
Once limited to the Tennessee River and tributaries, the darter now also lives in connected reservoirs. In 1975 and 1976, a population was transplanted to the Hiwassee River, and is doing well.
Biogeographic Regions: nearctic (Native )
- ترخيص
- cc-by-nc-sa-3.0
- حقوق النشر
- The Regents of the University of Michigan and its licensors
- الاقتباس الببليوغرافي
- Hall, N. 1999. "Percina tanasi" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Percina_tanasi.html
- مؤلف
- Noah Hall, University of Michigan-Ann Arbor
Habitat
(
الإنجليزية
)
المقدمة من Animal Diversity Web
Moderately flowing, vegetated streams with sandy bottoms and wide shoals for spawning.
Aquatic Biomes: rivers and streams
- ترخيص
- cc-by-nc-sa-3.0
- حقوق النشر
- The Regents of the University of Michigan and its licensors
- الاقتباس الببليوغرافي
- Hall, N. 1999. "Percina tanasi" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Percina_tanasi.html
- مؤلف
- Noah Hall, University of Michigan-Ann Arbor
Life Expectancy
(
الإنجليزية
)
المقدمة من Animal Diversity Web
Average lifespan
Status: captivity: 4 years.
- ترخيص
- cc-by-nc-sa-3.0
- حقوق النشر
- The Regents of the University of Michigan and its licensors
- الاقتباس الببليوغرافي
- Hall, N. 1999. "Percina tanasi" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Percina_tanasi.html
- مؤلف
- Noah Hall, University of Michigan-Ann Arbor
Morphology
(
الإنجليزية
)
المقدمة من Animal Diversity Web
Other Physical Features: bilateral symmetry
- ترخيص
- cc-by-nc-sa-3.0
- حقوق النشر
- The Regents of the University of Michigan and its licensors
- الاقتباس الببليوغرافي
- Hall, N. 1999. "Percina tanasi" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Percina_tanasi.html
- مؤلف
- Noah Hall, University of Michigan-Ann Arbor
Reproduction
(
الإنجليزية
)
المقدمة من Animal Diversity Web
Between January and mid-March, adult snail darters spawn on river shoals. Eggs deposited in gravel or on rocks hatch in 15 to 20 days.
- ترخيص
- cc-by-nc-sa-3.0
- حقوق النشر
- The Regents of the University of Michigan and its licensors
- الاقتباس الببليوغرافي
- Hall, N. 1999. "Percina tanasi" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Percina_tanasi.html
- مؤلف
- Noah Hall, University of Michigan-Ann Arbor