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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
06/05/1997 |
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Data da última atualização: |
31/03/2017 |
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Autoria: |
SMITH, E. N. |
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Título: |
Thermoregulation of the American alligator, Alligator mississippiensis. |
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Ano de publicação: |
1975 |
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Fonte/Imprenta: |
Physiological Zoology, v.48, p.177-194, 1975. |
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Idioma: |
Inglês |
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Conteúdo: |
Deep body, dorsal surface, and ventral surface temperatures and heart rate were measured from captive and free-ranging mature alligators by radio telemetry. Behavioral thermoregulation was achieved by changes in location and floating depth. Terrestrial basking was preceded by prebasking in shallow water parallel to the shoreline with the dorsum exposed to air. Following prebasking, the alligator would crawl out to bask or retreat do deeper water depending, in part, upon the relative drybulb air and water temperatures. Use was made of conduction heating from a warm substrate by periodic relocation. During basking the dorsum heated rapidly (0.09 C/min), but the core temperature did not increase markedly until movement or reentry into the water. The alligator was capable of maintaining a body temperature several degrees above the water temperature throughout periods of negative heat loading. Endogenous heat production and cardiovascular changes were postulated as aiding in heat retention. Cooling was acheved by evaporation of water from the periodically wetted dorsum and by submergence into deep water. Heating rates exceeded cooling rates under controlled conditions. Heart rate at a body temperature of 20 C during heating was about twice the heart rate at 20 C during cooling. Alligators demonstrate a trend toward homeokinesis of body temperature as do many terrestrial reptiles. |
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Palavras-Chave: |
American alligator; Termoregulacao. |
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Thesagro: |
Fisiologia; Jacaré. |
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Thesaurus Nal: |
Alligator mississippiensis; physiology. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01923naa a2200193 a 4500
001 1791005
005 2017-03-31
008 1975 bl --- 0-- u #d
100 1 $aSMITH, E. N.
245 $aThermoregulation of the American alligator, Alligator mississippiensis.
260 $c1975
520 $aDeep body, dorsal surface, and ventral surface temperatures and heart rate were measured from captive and free-ranging mature alligators by radio telemetry. Behavioral thermoregulation was achieved by changes in location and floating depth. Terrestrial basking was preceded by prebasking in shallow water parallel to the shoreline with the dorsum exposed to air. Following prebasking, the alligator would crawl out to bask or retreat do deeper water depending, in part, upon the relative drybulb air and water temperatures. Use was made of conduction heating from a warm substrate by periodic relocation. During basking the dorsum heated rapidly (0.09 C/min), but the core temperature did not increase markedly until movement or reentry into the water. The alligator was capable of maintaining a body temperature several degrees above the water temperature throughout periods of negative heat loading. Endogenous heat production and cardiovascular changes were postulated as aiding in heat retention. Cooling was acheved by evaporation of water from the periodically wetted dorsum and by submergence into deep water. Heating rates exceeded cooling rates under controlled conditions. Heart rate at a body temperature of 20 C during heating was about twice the heart rate at 20 C during cooling. Alligators demonstrate a trend toward homeokinesis of body temperature as do many terrestrial reptiles.
650 $aAlligator mississippiensis
650 $aphysiology
650 $aFisiologia
650 $aJacaré
653 $aAmerican alligator
653 $aTermoregulacao
773 $tPhysiological Zoology$gv.48, p.177-194, 1975.
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Registro original: |
Embrapa Pantanal (CPAP) |
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| Registros recuperados : 3 | |
| 3. |  | SIMPSON, A. J.; SONG, G.; SMITH, E.; LAM, B.; NOVOTNY, E. H.; HAYES, M. H. B. Unraveling the structural components of soil humin by use of solution-state nuclear magnetic resonance spectroscopy. Environmental Science & Technology, v. 41, n. 3, p. 876-883, Feb. 2007.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Internacional - A |
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| Registros recuperados : 3 | |
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