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Anti-predator mechanisms have not been studied extensively in this species, but one mechanism has been observed. When threatened, individuals display a defensive posture with an elevated tail, and the tail autotomizes (breaks off) when the salamander is handled. Also, long-tailed salamanders are quick, able to bolt for cover when threatened.
Known Predators:
Anti-predator Adaptations: cryptic
Long-tailed salamanders are typically yellow, but body color may range from yellow to red. Adults are between 100 and 200 mm long, with the tail making up about 60% of total body length. Long-tailed salamanders have large eyes and a slender body with stout limbs. A key characteristic of E. longicauda is a row of irregularly shaped, dark stripes found on the long, slender tail. Adult bodies have dark dashes or dots and may contain a broad dorsal band. The belly is colored light yellow to cream.
There are three recognized subspecies: Eurycea longicauda longicauda (long-tailed salamanders), Eurycea guttolineata (three-lined salamanders), and Eurycea longicauda melanopleura (dark-sided salamanders). Three-lined salamanders are identified by their coloration, which varies between yellow and bronze, as well as the three dark lines that run along the body and tail. Dark-sided salamanders are identified by two dark lines running along the sides of the body and tail with a lighter band running dorsally.
Long-tailed salamander larvae are aquatic and have features missing in terrestrial adults, including branching gills, slim bodies, and a tail fin that does not extend to the body. Larvae also differ from adults in that they have a cream colored dorsal pattern.
Range length: 100 to 200 mm.
Other Physical Features: ectothermic ; heterothermic ; bilateral symmetry
Sexual Dimorphism: sexes alike
This species is rarely bred in captivity and there is no information on its lifespan in the wild. Other plethodontids live as much as 5 to 10 years in the wild.
Typical lifespan
Status: wild: 5 to 10 years.
Long-tailed salamanders typically inhabit streams, limestone seeps, springs, caves, abandoned mines, wet shale banks, and ponds. Because of their bi-phasic lifecycle, both aquatic and terrestrial habitats are needed. Larvae grow in aquatic environments, such as streams, ponds, or cave pools, while adults are typically terrestrial, found underneath rocks, crevices, and stone fragments near the margins of streams.
Range elevation: 0 to 700 m.
Habitat Regions: temperate ; terrestrial ; freshwater
Terrestrial Biomes: forest
Aquatic Biomes: lakes and ponds; rivers and streams
Other Habitat Features: caves
Long-tailed salamanders communicate in similar ways to other plethodontid salamanders, using pheromones. These chemical signals are very important especially in mating rituals. Courtship rituals occur mainly aquatically, and one account reports tactile interactions as well. During mating, plethodontids typically exhibit head-rubbing, which serves a communicative purpose. Long-tailed salamanders have developed senses of smell and sight allowing them the ability to perceive its environment either visually or chemically.
Communication Channels: tactile ; chemical
Other Communication Modes: pheromones
Perception Channels: visual ; tactile ; vibrations ; chemical
Long-tailed salamanders remain locally abundant, but populations have declined due to habitat loss from strip mining, acid drainage from coal mining, and clear cutting. This species has been listed as threatened in both Kansas and New Jersey and is a species of special concern in North Carolina. In New Jersey, long-tailed salamanders were listed as a threatened species in 1979. This was attributed to the decline of natural habitats and pollution of larval ponds. The New Jersey Freshwater Wetlands Protection Act helped protect long-tailed salamanders in New Jersey by outlawing the development of wetland areas and "buffers." Buffers are protected areas within 150 feet of wetlands. In Kansas, the long-tailed salamanders are protected by the Kansas Nongame and Endangered Species Conservation Act. This act requires project developers to obtain a permit from the Environmental Services Section of the Kansas Department of Wildlife and Parks anytime a development project is proposed that will impact the natural habitats of the species.
US Federal List: no special status
CITES: no special status
IUCN Red List of Threatened Species: least concern
The larval period of long-tailed salamanders is typically 6 months. However, timing may vary among populations. In order to survive, aquatic larvae need shelter and food, which they find in a variety of aquatic invertebrates, including ostracods, copepods, and snails. If there is an insufficient food supply, metamorphosis may be delayed for a year and larvae may overwinter. The metamorphosis size of long-tailed salamanders is 23 to 28mm snout to vent length but, if overwintering occurs, they can be greater than 50 mm in total length.
Development - Life Cycle: metamorphosis ; indeterminate growth
There are no known adverse effects of E. longicauda on humans.
Long-tailed salamanders may help in pest control because they feed on various terrestrial invertebrates, but their effect on humans is minimal.
Positive Impacts: controls pest population
Long-tailed salamanders are predators on both terrestrial and aquatic invertebrates. They are also important competitors in cave environments with other salamanders. Long-tailed salamander larvae appear to be competitive equals with larval cave salamanders (Eurycea lucifuga), but they appear to be displaced by several other salamander species.
Long-tailed salamanders typically eat adult and immature arthropods, worms, and other terrestrial invertebrates. Although all adults are invertebrate generalists, the types of invertebrates preyed on depends on the environment. For example, in New Jersey, spiders, homopterans, beetles, and moths and butterflies are the main diet. However, in one Indiana population, more than 20 types of invertebrates are eaten.
Animal Foods: insects; terrestrial non-insect arthropods; terrestrial worms
Primary Diet: carnivore (Insectivore )
Eurycea longicauda is mainly distributed throughout the Ozark Highlands, Appalachian Highlands, and the Ohio River Valley. Long-tailed salamanders range from southeastern Missouri through extreme southern Illinois, throughout most of Kentucky, central and western Tennessee, extreme northeastern Mississippi, northern Alabama, northern Georgia, extreme southwestern and northwestern North Carolina, western Virginia, West Virginia, Maryland, Pennsylvania, southern New York, and in the north from extreme eastern Illinois, west through southern Indiana and into southern and eastern Ohio (Lannoo 2005). Map
Biogeographic Regions: nearctic (Native )
The mating system of E. longicauda has not been studied extensively and remains largely unknown. The only known courtship behavior is head-rubbing.
Main breeding activity occurs during late fall to early spring. Females lay 60 to 110 eggs in water, attached to the underside of rocks. Time to hatching ranges from 4 to 12 weeks. Long-tailed salamanders are sexually mature at an average age of 2 years old.
Breeding interval: Long-tailed salamanders breed once yearly.
Breeding season: Females lay their eggs between late autumn and early spring, depending on latitude and altitude.
Range number of offspring: 60 to 110.
Range time to hatching: 4 to 12 weeks.
Average age at sexual or reproductive maturity (female): 2 years.
Average age at sexual or reproductive maturity (male): 2 years.
Key Reproductive Features: iteroparous ; seasonal breeding ; gonochoric/gonochoristic/dioecious (sexes separate); sexual ; fertilization (External ); oviparous
There is little information on parental investment in E. longicauda. However, like most salamanders, females leave aquatic habitats after laying eggs, so there is little parental involvement after egg-laying.
Parental Investment: pre-fertilization (Provisioning, Protecting: Female); pre-hatching/birth (Provisioning: Female)
Ar sourd hirlostek (Eurycea longicauda) a zo un divelfenneg lostek hag a vev e reter Stadoù-Unanet Amerika.
Eurycea longicauda, commonly known as the long-tailed salamander[4] or longtail salamander,[5] is a species of lungless salamander native to the Appalachian Region of the eastern United States. It is a "cave salamander" that frequents twilight zones of caves and also inhabits springs and surrounding forest.[5]
There are two[1][6] or three subspecies:[3]
Eurycea guttolineata has earlier been treated as a subspecies of Eurycea longicauda (that is, as E. l. guttolineata), but is now considered a full species.[7]
Body color varies from yellow to orange-red to red with random black spots.[5] E. l. longicauda measure on average 50 mm (2.0 in) snout–vent length (SVL) and have 72 mm (2.8 in) long tail.[8]
E. l. melanopleura reproduces in November to February. The eggs measure 7 mm (0.28 in) in diameter. The larvae hatch in January–March at about 10 mm (0.39 in) snout–vent length (SVL). They metamorphose seven months later at 23–28 mm (0.91–1.10 in) SVL. Males become sexually mature between 31–43 mm (1.2–1.7 in) SVL and females 33–43 mm (1.3–1.7 in) SVL. The largest males and females are 55 mm (2.2 in) SVL.[9]
Eurycea longicauda inhabit streamsides, spring runs, ponds, cave mouths, and abandoned mines. With wet weather, they may venture into wooded terrestrial habitats. They hide in rock crevices or under rocks, logs, etc. Eggs are laid in underground crevices associated with aquatic environments, but in caves they may also be attached to objects in or above water.[1]
The overall population size of this species is large (probably more than 100,000). Some local populations may have been impacted by strip mining and acid drainage from coal mining, but there are no major threats overall. Its range overlaps with several protected areas.[1]
Eurycea longicauda, commonly known as the long-tailed salamander or longtail salamander, is a species of lungless salamander native to the Appalachian Region of the eastern United States. It is a "cave salamander" that frequents twilight zones of caves and also inhabits springs and surrounding forest.
Eurycea longicauda Eurycea generoko animalia da. Anfibioen barruko Plethodontidae familian sailkatuta dago, Caudata ordenan.
Eurycea longicauda Eurycea generoko animalia da. Anfibioen barruko Plethodontidae familian sailkatuta dago, Caudata ordenan.
Eurycea longicauda est une espèce d'urodèles de la famille des Plethodontidae[1]. En français elle est nommée Salamandre à longue queue.
Cette espèce est endémique de l'Est des États-Unis[1]. Elle se rencontre dans l'État de New-York, au New Jersey, en Pennsylvanie, au Maryland, en Virginie, en Virginie-Occidentale, en Ohio, en Indiana, au Kentucky, au Tennessee, dans le nord de la Géorgie, dans le Nord de l'Alabama, dans le nord du Mississippi, en Illinois, au Missouri, en Arkansas, dans l'est de l'Oklahoma, dans l'est du Kansas et dans le sud-est du Nebraska[2].
Son habitat naturel est constitué par les forêts tempérées, les rivières, les marais d'eau douce, les sources d'eau, les territoires karstiques et les grottes.
Eurycea longicauda est une espèce d'urodèles de la famille des Plethodontidae. En français elle est nommée Salamandre à longue queue.
Eurycea longicauda é uma espécie de salamandra da família Plethodontidae.
É endémica dos Estados Unidos da América.
Os seus habitats naturais são: florestas temperadas, rios, rios intermitentes, marismas de água doce, nascentes de água doce, sistemas cársticos interiores e cavernas.[1]
Eurycea longicauda é uma espécie de salamandra da família Plethodontidae.
É endémica dos Estados Unidos da América.
Os seus habitats naturais são: florestas temperadas, rios, rios intermitentes, marismas de água doce, nascentes de água doce, sistemas cársticos interiores e cavernas.
Långsvansad bäcksalamander (Eurycea longicauda) är ett stjärtgroddjur i familjen lunglösa salamandrar som återfinns i Nordamerika.
Arten delas in i två underarter:
Tidigare räknades även trestrimmig bäcksalamander (Eurycea guttolineata) som en tredje underart, E. longicauda guttolineata. Den betraktas emellertid numera som en egen art.[3]
Salamandern är lång och slank, med en maxlängd på 16 cm. Rygg och sidor är gulaktiga med spridda mörka fläckar. Svanssidorna har mörka tvärstreck. Buken är gul till blekt beige, och vanligen utan fläckar. Underarten Eurycea l. melanopleura är mörkare, gulgrönt till gulbrunt färgad, med enfärgat mörka kropps- och stjärtsidor.[2]
Som alla salamandrar i familjen saknar den lungor, och andas i stället med huden och svalget, som har blodkärlsrika fåror för att underlätta syreupptaget.[4]
Den långsvansade bäcksalamandern finns i USA från södra New York till Missouri och söderöver i höjd med Arkansas, nordöstligaste Mississippi, norra Alabama, nordvästligaste Georgia, västra North Carolina och nordvästra Virginia.[1]
De vuxna salamandrarna är främst landlevande, även om de inte undviker vatten och är skickliga simmare. Vanligtvis gömmer de sig i och under murkna trädstammar och under stenar, i klippspringor och bland klippblock nära vattendrag. De kan också uppehålla sig i grottor. Den långsvansade bäcksalamandern är en social art, som inte förefaller att hävda revir. Den är främst aktiv under och strax efter skymningen, speciellt fuktiga och regniga nätter. Arten drar sig tillbaka till underjordiska utrymmen under oktober till april eller tidigt i maj, men om den sover någon egentlig vintersömn är oklart. Likt många ödlor kan arten snöra av sig svansen om den hotas av någon fiende.[5]
De vuxna individerna livnär sig framför allt av olika vattenlevande ryggradslösa djur som insekter, spindlar, mångfotingar, snäckor och daggmaskar.[2] Larverna tar små kräftdjur, snäckor, mygg- och sländlarver och små skalbaggar.[5]
Arten blir könsmogen vid mellan 1 och 2 års ålder. Litet är känt om parningsleken, men med utgångpunkt från studiet av djur i fångenskap antar man att den involverar samma typ av omslingringar och nafsanden som förekommer hos andra arter i familjen. Den kan ske under ett långt intervall, från vår till tidig höst, beroende på breddgrad och höjd över havet. Honan lägger mellan 60 och 100 ägg per år, i en eller flera omgångar. De kläcks efter 1 till 3 månader, och larvutvecklingen tar omkring ett halvår, men variationerna är stora.[5] Äggen kan läggas både i vatten eller på land; i det senare fallet sker det i omgivningar med hög luftfuktighet, som grottor eller fuktiga klippspringor[5] [2].
Den långsvansade bäcksalamandern betraktas som livskraftig ("LC"), populationen är stabil och man har inte konstaterat några egentliga hot.[1]
Långsvansad bäcksalamander (Eurycea longicauda) är ett stjärtgroddjur i familjen lunglösa salamandrar som återfinns i Nordamerika.
Eurycea longicauda là một loài Plethodontidae bản địa Appalachia phía Đông Hoa Kỳ.
E. longicauda chia làm 2 loài:[3]
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Dữ liệu liên quan tới Eurycea longicauda tại Wikispecies
Phương tiện liên quan tới Eurycea longicauda tại Wikimedia Commons
Bài viết Bộ Có đuôi này vẫn còn sơ khai. Bạn có thể giúp Wikipedia bằng cách mở rộng nội dung để bài được hoàn chỉnh hơn. Eurycea longicauda là một loài Plethodontidae bản địa Appalachia phía Đông Hoa Kỳ.
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