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- bullfrog
WordNet
- largest North American frog; highly aquatic with a deep-pitched voice (同)Rana_catesbeiana
- ancient Egyptian sun god with the head of a hawk; a universal creator; he merged with the god Amen as Amen-Ra to become the king of the gods (同)Re
- type genus of the Ranidae (同)genus Rana
PrepTutorEJDIC
- ウシガエル(食用)
- radiumの化学記号
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2016/02/03 11:37:09」(JST)
wiki en
| American bullfrog | |
|---|---|
| Adult male bullfrog | |
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Conservation status
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Least Concern (IUCN 3.1)[1] |
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| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Subphylum: | Vertebrata |
| Class: | Amphibia |
| Order: | Anura |
| Family: | Ranidae |
| Genus: | Rana |
| Species: | R. catesbeiana |
| Binomial name | |
| Rana catesbeiana Shaw, 1802 |
|
| Natural range – red; Introduced range – dark green |
|
| Synonyms | |
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List
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The American bullfrog (Rana catesbeiana), often simply known as the bullfrog in Canada and the United States, is an amphibious frog, a member of the family Ranidae, or “true frogs”. This frog has an olive green back and sides blotched with brownish markings and a whitish belly spotted with yellow or grey. The upper lip is often bright green and males have yellow throats. It inhabits large, permanent water bodies, such as swamps, ponds, and lakes, where it is usually found along the water's edge. The male bullfrog defends a territory during the breeding season. His call is reminiscent of the roar of a bull, which gives the frog its common name. This frog is native to southern and eastern parts of the United States and Canada, but has been widely introduced across other parts of North, Central and South America, Western Europe, and parts of Asia, and in some areas is regarded as an invasive species.
The bullfrog is harvested for use as food in North America and in several countries into which it has been introduced. It is also cultured in controlled environments, though this is a difficult and not always successful undertaking. Some international trade in frog legs occurs for human consumption. Bullfrogs are used in biology classes in schools for dissection and are sometimes kept as pets.
Contents
- 1 Taxonomy
- 2 Etymology
- 3 Description
- 4 Distribution
- 5 Breeding behavior
- 5.1 Choruses
- 5.2 Aggressive behavior
- 6 Growth and development
- 7 Feeding
- 8 Ecology
- 9 Human use
- 10 References
- 11 External links
TaxonomyEdit
Most authorities accept the scientific name, Rana catesbeiana,[2][3] and this is the name used in scientific papers before 2006 and after 2008.[4] Between 2006 and 2008 it was included in the genus Lithobates as Lithobates catesbeianus.[1][5][6]
Mitochondrial DNA studies of New World species put Rana catesbeiana in the Aquarana subgenus of Rana and suggest this is a sister group to Rana sylvatica, the wood frog. The data strongly supported the monophyly of the Aquarana grouping, which includes the green frog (Rana clamitans) and the Florida bog frog (Rana okaloosae), which appear to have recently diverged, and the closely related American bullfrog (R. catesbeiana) and river frog (R. heckscheri).[3] This placement was disputed by Darrel Frost and the American Museum of Natural History, who placed most of the North American ranids in the genus Lithobates.[7] His view is rejected by Bryan Stuart[8] and Pauly et al. (2009)[9] and it is not accepted by AmphibiaWeb.[10]
EtymologyEdit
The specific name, catesbeiana (feminine) or catesbeianus (masculine), is in honor of English naturalist Mark Catesby.[11]
DescriptionEdit
American bullfrog
The dorsal (upper) surface of the bullfrog has an olive-green basal color, either plain or with a mottling and banding of grayish-brown. The ventral (under) surface is off-white blotched with yellow or gray. There is often a marked contrast in color between the green upper lip and the pale lower lip.[12] The teeth are tiny and are useful only in grasping.[13] The eyes are prominent with brown irises and horizontal almond-shaped pupils. The tympani (eardrums) are easily seen just behind the eyes and the dorsolateral folds of skin end close to them. The limbs are blotched or banded with gray. The forelegs are short and sturdy and the hind legs long. The front toes are not webbed, but the back toes have webbing between the digits with the exception of the fourth toe which is unwebbed.[12]
Bullfrogs are sexually dimorphic, with males being smaller than females and having yellow throats. Males have tympani larger than their eyes, whereas the tympani in females are about the same size as the eyes.[12] Bullfrogs measure about 3.6 to 6 in (9 to 15 cm) from snout to vent. They grow fast in the first eight months of life, typically increasing in weight from 5 to 175 g (0.18 to 6.17 oz),[14] and large mature individuals can weigh up to 500 g (1.1 lb).[15] In some cases bullfrogs have been recorded as attaining 800 g (1.8 lb) and measuring up to 8 in (20 cm) in length.[14][16]
DistributionEdit
In typical aquatic habitat
The bullfrog is native to eastern North America. Its natural range extends from the Atlantic Coast to as far west as Oklahoma and Kansas. It is not found on offshore islands near Cape Cod and is largely absent from Florida, Colorado, Nebraska, South Dakota, and Minnesota.[17] It has been introduced into Nantucket island, Arizona, Utah, other parts of Colorado and Nebraska, Nevada, California, Oregon, Washington, and Hawaii. In these states, it is considered to be an invasive species and there is concern that it may outcompete native species of amphibians and upset the ecological balance.[17] It is very common in California, where it is believed to pose a threat to the California red-legged frog and is considered to be a factor in the decline of that vulnerable species.[18]
Other countries into which the bullfrog has been introduced include Mexico, the western half of Canada, Cuba, Jamaica, Italy, the Netherlands, and France.[19] It is also found in Argentina, Brazil, Uruguay, Venezuela, Colombia, China and Japan.[20] The reasons for introducing the bullfrog to these countries have included their intentional release, either to provide a source of food or as biological control agents, the escape of frogs from breeding establishments, and the escape or release of frogs kept as pets.[19] Conservationists are concerned the bullfrog is relatively immune to the fungal infection chytridiomycosis and as it invades new territories, it may assist the spread of this lethal disease to more susceptible native species of frog.[20]
Breeding behaviorEdit
The bullfrog breeding season typically lasts two to three months.[21][22] A study of bullfrogs in Michigan showed the males arriving at the breeding site in late May or early June, and remaining in the area into July. The territorial males that occupy sites are usually spaced some 3 to 6 m (9.8 to 19.7 ft) apart and call loudly.[23][24] At least three different types of calls have been noted in male bullfrogs under different circumstances. These distinctive calls include territorial calls made as threats to other males, advertisement calls made to attract females, and encounter calls which precede combat.[25][26]
The bullfrogs have a prolonged breeding season,[21] with the males continuously engaging in sexual activity throughout. Males are present at the breeding pond for longer periods than females during the entire season, increasing their chances of multiple matings.[23][24] The sex ratio is typically skewed toward males.[26] Conversely, females have brief periods of sexual receptivity during the season. In one study, female sexual activity typically lasted for a single night and mating did not occur unless the females initiated the physical contact.[21][26] Males only clasp females after they have indicated their willingness to mate.[21] This finding refutes previous claims that a male frog will clasp any proximate female with no regard to whether the female has consented.[25][27][28][29]
These male and female behaviors cause male-to-male competition to be high within the bullfrog population and sexual selection for the females to be an intense process.[21] Kentwood Wells postulated leks, territorial polygyny, and harems are the most likely classifications for the bullfrog mating system. Leks would be a valid description because males congregate to attract females, and the females arrive to the site for the purpose of copulation.[21][25] In a 1980 study on bullfrogs in New Jersey, the mating system was classified as resource-defense polygyny. The males defended territories within the group and demonstrated typical physical forms of defense.[26]
ChorusesEdit
Male bullfrogs aggregate into groups called choruses. The male chorus behavior is analogous to the lek formation of birds, mammals, and other vertebrates. Choruses are dynamic, forming and remaining associated for a few days, breaking down temporarily, and then forming again in a new area with a different group of males.[25] Male movement has experimentally been noted to be dynamic.[26] In the Michigan study, the choruses were described as “centers of attraction” in which their larger numbers enhanced the males’ overall acoustical displays. This is more attractive to females and also attractive to other sexually active males. Choruses in this study were dynamic, constantly forming and breaking up. New choruses were formed in other areas of the site. Males moved around and were highly mobile within the choruses.[21]
A review of multiple studies on bullfrogs and other anurans noted male behavior within the groups changes according to the population density of the leks. At higher population densities, leks are favored due to the difficulty in defending individual territories among a large population of males. This variance causes differences in how females choose their mates. When the male population density is low and males maintain clearer, more distinct territories, female choice is mostly determined by territory quality.[25] When male population density is higher, females depend on other cues to select their mates. These cues include the males’ positions within the chorus and differences in male display behaviors among other determinants.[23][25] Social dominance within the choruses is established through challenges, threats, and other physical displays. Older males tend to acquire more central locations while younger males were restricted to the periphery.[21]
Chorus tenure is the number of nights that a male participates in the breeding chorus.[30] One study distinguishes between chorus tenure and dominant tenure. Dominant tenure is more strictly defined as the amount of time a male maintains a dominant status.[31] Chorus tenure is restricted due to increased risk of predation,[32] lost foraging opportunities,[33] and higher energy consumption.[34] Calling is postulated to be energetically costly to anurans in general.[35] Energy is also expended through locomotion and aggressive interactions of male bullfrogs within the chorus.[31]
Aggressive behaviorEdit
To establish social dominance within choruses, bullfrogs demonstrate various forms of aggression, especially through visual displays. Posture is a key factor in establishing social position and threatening challengers.[25] Territorial males have inflated postures while nonterritorial males remain in the water with only their heads showing. For dominant (territorial) males, their elevated posture reveals their yellow-colored throats.[23][25] When two dominant males encounter each other, they engage in a wrestling bout. The males have their venters clasped, each individual in an erect position rising to well above water level.[25] The New Jersey study noted the males would approach each other to within a few centimeters and then tilt back their heads, displaying their brilliantly colored gular sacs. The gular is dichromatic in bullfrogs, with dominant and fitter males displaying yellow gulars. The New Jersey study also reported low posture with only the head exposed above the water surface was typical of subordinate, or nonterritorial males, and females. High posture was demonstrated by territorial males, which floated on the surface of the water with their lungs inflated, displaying their yellow gulars.[26] Males optimize their reproductive fitness in a number of ways. Early arrival at the breeding site, prolonged breeding with continuous sexual activity throughout the season, ownership of a centrally located territory within the chorus, and successful movement between the dynamically changing choruses are all common ways for males to maintain dominant, or territorial, status within the chorus. Older males have greater success in all of these areas than younger males.[21] Some of the males display a more inferior role, termed by many researchers as the silent male status. These silent males adopt a submissive posture, sit near resident males and make no attempt to displace them. The silent males do not attempt to intercept females but are waiting for the territories to become vacant.[23][25] This has also been called the alternate or satellite male strategy.[25]
Growth and developmentEdit
Bullfrog larva and mouthparts
Juvenile with a small, grey, oval-shaped area on top of the head, the parietal eye
After selecting a male, the female deposits eggs in his territory.[26] During the mating grasp, or amplexus, the male rides on top of the female, grasping her just behind her fore limbs. The female chooses a site in shallow water among vegetation, and lays a batch of up to 20,000 eggs, and the male simultaneously releases sperm, resulting in external fertilization.[36] The eggs form a thin, floating sheet which may cover an area of 0.5 to 1 m2 (5.4 to 10.8 sq ft). The embryos develop best at water temperatures between 24 and 30 °C (75 and 86 °F) and hatch in three to five days. If the water temperature rises above 32 °C (90 °F), developmental abnormalities occur, and if it falls below 15 °C (59 °F), normal development ceases.[17] Newly hatched tadpoles show a preference for living in shallow water on fine gravel bottoms. This may reflect a lesser number of predators in these locations. As they grow, they tend to move into deeper water. The tadpoles initially have three pairs of external gills and several rows of labial teeth. They pump water through their gills by movements of the floor of their mouths, trapping bacteria, single-celled algae, protozoans, pollen grains, and other small particles on mucus in a filtration organ in their pharanges. As they grow, they begin to ingest larger particles and use their teeth for rasping. They have downward-facing mouths, deep bodies, and tails with broad dorsal and ventral fins.[37]
Time to metamorphosis ranges from a few months in the southern part of the range to three years in the north where the colder water slows development.[36] Maximum lifespan in the wild is estimated to be eight to ten years, but one frog lived for almost sixteen years in captivity.[36]
FeedingEdit
Bullfrogs are voracious, opportunistic, ambush predators that prey on any small animal they can overpower and stuff down their throats. Bullfrog stomachs have been found to contain rodents, small reptiles, amphibians, crayfish, birds, and bats,[38][39] as well as the many invertebrates, such as insects, which are the usual food of ranid frogs. These studies revealed the bullfrog's diet to be unique among North American ranids in the inclusion of a large percentage of aquatic animals, such as fish, tadpoles, ram's horn snails, and dytiscid beetles. Bullfrogs can capture large, strong prey because of the powerful grip of their jaws after the initial ranid tongue strike. The bullfrog is able to make allowance for light refraction at the water-air interface by striking at a position posterior to the target's perceived location. The comparative ability of bullfrogs to capture submerged prey, compared to that of the green frog, leopard frog, and wood frog (R. clamitans, R. pipiens, and R. sylvatica, respectively) was also demonstrated in laboratory experiments.[13]
Prey motion elicits feeding behavior. First, if necessary, the frog performs a single, orienting bodily rotation ending with the frog aimed towards the prey, followed by approaching leaps, if necessary. Once within striking distance, the bullfrog begins its feeding strike, which consists of a ballistic lunge (eyes closed as during all leaps) that ends with the mouth opening. At this stage, the fleshy, mucous-coated tongue is extended towards the prey, often engulfing it, while the jaws continue their forward travel to close (bite) just as the tongue is retracted. Large prey that do not fit entirely into the mouth are stuffed in with the hands. In laboratory observations, bullfrogs taking mice usually swam underwater with prey in mouth, apparently with the advantageous result of altering the mouse's defense from counter-attack to struggling for air. Asphyxiation is the most likely cause of death of endothermic (warm-blooded) prey.[13]
EcologyEdit
Alligator feeding on a bullfrog
Bullfrogs are an important item of prey to many birds (especially large herons), North American river otters (Lontra canadensis), predatory fish, and occasionally other amphibians. Predators of American bullfrogs once in their adult stages can range from 150 g (5.3 oz) belted kingfishers (Megaceryle alcyon) to 1,100 pound American alligators (Alligator mississippiensis).[40][41] The eggs and larvae are unpalatable to many salamanders and fish, but the high levels of activity of the tadpoles may make them more noticeable to a predator not deterred by their unpleasant taste. Humans hunt bullfogs as game and consume their legs. Adult frogs try to escape by splashing and leaping into deep water. A trapped individual may squawk or emit a piercing scream, which may surprise the attacker sufficiently for the frog to escape. An attack on one bullfrog is likely to alert others in the vicinity to danger and they will all retreat into the safety of deeper water. Bullfrogs may be at least partially resistant to the venom of copperhead (Agkistrodon contortrix) and cottonmouth (Agkistrodon piscivorus) snakes, though these species are known natural predators of bullfrogs as are northern water snakes (Nerodia sipedon).[20][42][43]
Human useEdit
Bullfrogs in a Chinese supermarket
The American bullfrog provides a food source, especially in the Southern and some areas of the Midwestern United States. The traditional way of hunting them is to paddle or pole silently by canoe or flatboat in ponds or swamps at night; when the frog's call is heard, a light is shone at the frog which temporarily inhibits its movement. The frog will not jump into deeper water as long as it is approached slowly and steadily. When close enough, the frog is gigged with a multiple-tined spear and brought into the boat.[39] Bullfrogs can also be stalked on land, by again taking great care not to startle them.[44] In some states, breaking the skin while catching them is illegal, and either grasping gigs or hand capture are used. The only parts normally eaten are the rear legs, which resemble small chicken drumsticks and can be cooked in similar ways.[39]
Commercial bullfrog culture in near-natural enclosed ponds has been attempted, but is fraught with difficulties. Although pelleted feed is available, the frogs will not willingly consume artificial diets, and providing sufficient live prey is challenging. Disease also tends to be a problem even when great care is taken to provide sanitary conditions. Other challenges to be overcome may be predation, cannibalism, and low water quality.[45] The frogs are large, have powerful leaps, and inevitably escape after which they may wreak havoc among the native frog population.[39] Countries that export bullfrog legs include Belgium, the Netherlands, Mexico, Bangladesh, Japan, China, Taiwan and Indonesia. Most of these frogs are caught from the wild, but some are captive-reared. The United States is a net importer of frog legs.[45]
The American bullfrog is used as a specimen for dissection in many schools across the world.[46] It is the state amphibian of Missouri, Ohio, and Oklahoma.[47]
ReferencesEdit
- ^ a b Santos-Barrera, G.; Hammerson, G.; Hedges, B.; Joglar, R.; Inchaustegui, S.; Lue, K.; Chou, W.; Gu, H.; Shi, H.; Diesmos, A.; Iskandar, D.; van Dijk, P.P.; Matsui, M.; Schmidt, B.; Miaud, C.; Martínez-Solano, I. (2009). "Lithobates catesbeianus". IUCN Red List of Threatened Species. Version 2014.3. International Union for Conservation of Nature. Retrieved 2015-01-17.
- ^ Hillis, D. M. (2007). "Constraints in naming parts of the Tree of Life". Molecular Phylogenetics and Evolution 42 (2): 331–338. doi:10.1016/j.ympev.2006.08.001. PMID 16997582.
- ^ a b Hillis, D. M. and Wilcox, T. P. (2005). "Phylogeny of the New World True Frogs (Rana)" (PDF). Molecular Phylogenetics and Evolution 34 (2): 299–314. doi:10.1016/j.ympev.2004.10.007. PMID 15619443.
- ^ Orchard, Stan A. "Is the American bullfrog Rana catesbeiana or Lithobates catesbeianus?". Bullfrog control. Retrieved 2013-09-06.
- ^ American Bullfrog (Lithobates catesbeianus), Ontario Nature
- ^ Lithobates catesbeianus, USDA. Retrieved 2013-09-06
- ^ Frost, Darrel (2011). "American Museum of Natural History: Amphibian Species of the World 5.5, an Online Reference". Herpetology. The American Museum of Natural History. Retrieved 2013-02-17.
- ^ Stuart, Bryan L. (2008). "The phylogenetic problem of Huia (Amphibia: Ranidae)". Molecular Phylogenetics and Evolution 46 (1): 40–60. doi:10.1016/j.ympev.2007.09.016. PMID 18042407.
- ^ Pauly, Greg B.; Hillis, David M.; Cannatella, David C. (2009). "Taxonomic freedom and the role of official lists of species names" (PDF). Herpetologica 65 (2): 115–128. doi:10.1655/08-031R1.1.
- ^ QUERY: SELECT * FROM amphib WHERE genus = "Rana" AmphibiaWeb: Information on amphibian biology and conservation.
- ^ Feduccia, Alan (editor). 1985. Catesby's Birds of Colonial America. Chapel Hill, North Carolina: University of North Carolina Press. 208 pp. ISBN 978-0807848166. (Rana catesbeiana, Preface, p. xiii).
- ^ a b c Knapp, W. W. (2008-05-28). "Bullfrog – Rana catesbeiana". The Frogs and Toads of Georgia. Retrieved 2013-01-20.
- ^ a b c Cardini, F. (1974) Specializations of the Feeding Response of the Bullfrog, Rana catesbeiana, for the Capture of Prey Submerged in Water. M.S. Thesis, U. of Massachusetts, Amherst, MA
- ^ a b Lutz, G. & Avery, J. "Bullfrog Culture". Southern Regional Aquaculture Center. Retrieved 2013-01-09.
- ^ "ANIMAL BYTES- North American Bullfrog". Sea World. Retrieved 2013-01-09.
- ^ "Rana catesbeiana". Fisheries and Aquaculture Department. Retrieved 2013-01-09.
- ^ a b c McKercher, Liz; Gregoire, Denise R. (2011-09-14). "Lithobates catesbeianus (Shaw, 1802)". Nonindigenous Aquatic Species. U.S. Geological Survey. Retrieved 2013-01-20.
- ^ Hammerson, Geoffrey (2008). "Rana draytonii". IUCN Red List of Threatened Species. Version 2012.2. Retrieved 2013-01-23.
- ^ a b Crayon, John J. (2009-12-03). "Lithobates catesbeianus (=Rana catesbeiana) (amphibian)". Global Invasive Species Database. Invasive Species Specialist Group. Retrieved 2013-01-20.
- ^ a b c Lu, Christine; Sopory, Ambika (2010-08-23). "Rana catesbeiana". AmphibiaWeb. Retrieved 2013-01-20.
- ^ a b c d e f g h i Emlen, Stephen T (1976). "Lek organization and mating strategies in the bullfrog". Behavioral Ecology and Sociobiology 1 (3): 283–313. doi:10.1007/BF00300069. JSTOR 4599103.
- ^ Blair, Albert P (1963). "Notes on anuran behavior, especially Rana catesbeiana". Herpetologica 19 (2): 151–151.
- ^ a b c d e Emlen, Stephen T (1968). "Territoriality in the bullfrog, Rana catesbeiana". Copeia 1968 (2): 240–243. doi:10.2307/1441748. JSTOR 1441748.
- ^ a b Wiewandt, Thomas A (1969). "Vocalization, aggressive behavior, and territoriality in the bullfrog, Rana catesbeiana". Copeia 1969 (2): 276–285. doi:10.2307/1442074. JSTOR 1442074.
- ^ a b c d e f g h i j k Wells, Kentwood D (1977). "Territoriality and male mating success in the green frog (Rana clamitans)". Ecology 58 (4): 750–762. doi:10.2307/1936211. JSTOR 1936211.
- ^ a b c d e f g Ryan, Michael J. (1980). "The Reproductive Behavior of the Bullfrog (Rana catesbiana)" (PDF). Copeia 1980: 108–114. doi:10.2307/1444139. JSTOR 1444139.
- ^ Blair, W. Frank (1958). "Call structure and species groups in US treefrogs (Hyla)". The Southwestern Naturalist 3: 77–89. doi:10.2307/3669039. JSTOR 3669039.
- ^ Bogert, Charles Mitchill (1960). The influence of sound on the behavior of amphibians and reptiles, American Institute of Biological Sciences.
- ^ Littlejohn, M. J.; Martin, A. A. (1969). "Acoustic interaction between two species of leptodactylid frogs". Animal Behaviour 17 (4): 785–791. doi:10.1016/S0003-3472(69)80027-8.
- ^ Murphy, Christopher G. (1994). "Chorus tenure of male barking treefrogs, Hyla gratiosa". Animal Behaviour 48 (4): 763. doi:10.1006/anbe.1994.1301.
- ^ a b Judge, Kevin A.; Brooks, Ronald J. (2001). "Chorus participation by male bullfrogs, Rana catesbeiana: a test of the energetic constraint hypothesis". Animal Behaviour 62 62 (5): 849–861. doi:10.1006/anbe.2001.1801.
- ^ Ryan, Michael J.; Tuttle, Merlin D.; Taft, Lucinda K. (1981). "The costs and benefits of frog chorusing behavior". Behavioral Ecology and Sociobiology 8 (4): 273–278. doi:10.1007/BF00299526.
- ^ Woolbright, Lawrence L.; Stewart, Margaret M. (1987). "Foraging success of the tropical frog, Eleutherodactylus coqui: the cost of calling". Copeia 1987: 69–75. doi:10.2307/1446039. JSTOR 1446039.
- ^ Prestwich, Kenneth N., Kristin E. Brugger, and Mary Topping (1989). "Energy and communication in three species of hylid frogs: power input, power output and efficiency". Journal of Experimental Biology 144 (1): 53–80.
- ^ Pough, F. H., et al. (1992) "Behavioral energetics", pp. 395–436 in Environmental physiology of the amphibians, University of Chicago Press, ISBN 0226239446.
- ^ a b c Casper, G. S. and Hendricks, R. (2005) Amphibian Declines: The Conservation Status of United States Species, M. Lannoo (ed.) University of California Press ISBN 0520235924.
- ^ Stebbins, Robert C.; Cohen, Nathan W. (1995). A Natural History of Amphibians. Princeton University Press. pp. 181–184. ISBN 0-691-03281-5.
- ^ Mikula, P. 2015: Fish and amphibians as bat predators. European Journal of Ecology 1 (1): 71-80. doi: 10.1515/eje-2015-0010
- ^ a b c d Moyle, Peter (2012-07-04). "Bullfrog". Eat the Invaders. Retrieved 2013-02-18.
- ^ Murray, B. G.; Jehl, J. R. (1964). "Weight of autumn migrants from coastal New Jersey". Bird-Banding 35 (4): 253–63. doi:10.2307/4511101. JSTOR 4511101.
- ^ "American Alligator (Alligator mississippiensis) longevity, ageing, and life history". The Animal Ageing and Longevity Database. Retrieved 2014-02-06.
- ^ Conant, Roger. (1975). A Field Guide to Reptiles and Amphibians of Eastern and Central North America, Second Edition. Houghton Mifflin Company, Boston.
- ^ Ryan, M. J. (1980). "The reproductive behavior of the bullfrog (Rana catesbeiana)" (PDF). Copeia 1980 (1): 108–114. doi:10.2307/1444139.
- ^ "How to Catch a Bullfrog". WikiHow to do anything. Retrieved 2013-02-17.
- ^ a b Lutz, C. Greg; Avery, Jimmy L. (1999). "Bullfrog Culture". Southern Regional Aquaculture Center. Retrieved 2013-02-17.
- ^ "Dissecting A Frog: A Middle School Rite Of Passage". NPR.org. Retrieved 2016-01-20.
- ^ "Official state amphibians". NetState.com. 2012-07-11. Retrieved 2013-01-23.
External linksEdit
| Wikimedia Commons has media related to Rana catesbeiana. |
| Wikispecies has information related to: Rana catesbeiana |
- Herps of Texas: Rana catesbeiana
- British Columbia Frog Watch Program: Bull Frog Fact Sheet
- Bullfrog at allaboutfrogs.com
- Bullfrog at the Global Invasive Species Database
- Bullfrog recordings
English Journal
- Patterns of Cranial Development in Larval Rana macrocnemis: Chondrocranial Size and Shape Relationship With Pelophylax bedriagae (Anura: Ranidae).
- Yildirim E1, Kaya U1.
- Anatomical record (Hoboken, N.J. : 2007).Anat Rec (Hoboken).2016 Jun;299(6):711-21. doi: 10.1002/ar.23341. Epub 2016 Mar 21.
- Notwithstanding the abundance of amphibians, there are few descriptions about ranid cranial development. Herein, larval chondrocranial development of Uludağ frog, Rana macrocnemis (Boulenger, 1885), is described on cleared and double-stained specimens. Descriptions are related with the ontogeny of
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- Maher SK1, Wojnarowicz P1, Ichu TA2, Veldhoen N1, Lu L3, Lesperance M3, Propper CR4, Helbing CC5.
- Comparative biochemistry and physiology. Part D, Genomics & proteomics.Comp Biochem Physiol Part D Genomics Proteomics.2016 Jun;18:44-53. doi: 10.1016/j.cbd.2016.04.002. Epub 2016 Apr 7.
- Thyroid hormones (THs), l-thyroxine (T4) and 3,5,3'-triiodothyronine (T3), are essential for vertebrate growth and development. Classically, T4 is 5'-deiodinated to the active hormone, T3, in target tissues which then binds nuclear TH receptors (TRs) and regulates gene transcription. However, it is
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- New Trends on Antineoplastic Therapy Research: Bullfrog (Rana catesbeiana Shaw) Oil Nanostructured Systems.
- Amaral-Machado L1,2,3, Xavier-Júnior FH4, Rutckeviski R5, Morais AR6, Alencar ÉN7, Dantas TR8, Cruz AK9, Genre J10, da Silva-Junior AA11, Pedrosa MF12, Rocha HA13, Egito ES14,15,16.
- Molecules (Basel, Switzerland).Molecules.2016 Apr 30;21(5). pii: E585. doi: 10.3390/molecules21050585.
- Bullfrog oil is a natural product extracted from the Rana catesbeiana Shaw adipose tissue and used in folk medicine for the treatment of several diseases. The aim of this study was to evaluate the extraction process of bullfrog oil, to develop a suitable topical nanoemulsion and to evaluate its effi
- PMID 27144557
Japanese Journal
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- 北海道爬虫両棲類研究報告 2, 5-12, 2014-07
- NAID 40020228743
- 分散中のウシガエル幼体(Rana catesbeiana)による作業道の水たまりの利用状況
- 岩﨑 史知
- 爬虫両棲類学会報 2012(1), 1-4, 2013-03
- NAID 40019666216
- 筋膜による筋間連結の機能的役割 : ウシガエル膝伸筋を用いた研究
- 石井 禎基,崎田 正博,笹井 宣昌,笠松 大輔,米井 信二,福田 智之,土屋 禎三
- 理学療法学 40(1), 16-23, 2013-02-20
- 【目的】大腿部における筋間連結の機能的役割をあきらかにする。【方法】標本として,ウシガエル膝伸筋の大腿三頭筋のうち前大腿直筋を除いた内側広筋と外側広筋の2筋を用いた。標本の支配神経分枝以外をすべて切断した坐骨神経に電気刺激を与えて,様々に筋長を変えたときの等尺性強縮張力を測定した。張力測定は,生体そのままの条件(連結条件)と標本をハムストリングスおよび股関節内転筋群から切り離した条件(切離条件)で …
- NAID 110009594479
Related Links
- The American bullfrog (Rana catesbeiana or by some authorities as Lithobates catesbeianus) often simply known as the bullfrog in Canada and the United States, is an aquatic frog, a member of the family Ranidae, or “true frogs”, native to ...
- 23 Aug 2010 ... Logo-small. Can you confirm these amateur observations of Rana catesbeiana? ... Rana catesbeiana is strongly aquatic, and can be found primarily at the edges of lakes, marshes, or cypress bays (Conant and Collins 1975).
Related Pictures
★リンクテーブル★
| リンク元 | 「bullfrog」「ウシガエル」 |
| 関連記事 | 「Rana」 |
「bullfrog」
「ウシガエル」
「Rana」
- 関
- Ranidae