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| | Indiana State University - Department of Life Sciences |
 | | Additionally, I study the thermoregulatory behavior and thermal physiology of ectotherms. | | | We are using diverse model systems in hopes of understanding the mechanisms that govern the thermal coadaptation of behavior, physiology, and life history. | | | I am an evolutionary ecologist who integrates studies of behavior and physiology to understand the causes of geographic variation in the life histories of ectotherms. |
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http://web.indstate.edu/biology/faculty/angilletta.htm
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| | [No title] |
| | Not all homeotherms are endotherms; many ectotherms such as lizards have attained a substantial degree of homeothermy by means of behavioral thermoregulation. | | | Indeed, the Australian mammalogist Finlayson (1943) referred to the vast interior deserts of Australia as "a land of lizards." Like other ectotherms, lizards obtain their bodily heat solely from the external environment, as opposed to endotherms such as birds and mammals which can produce their own heat internally by means of oxidative metabolism. | | | Many ectothermic lizards actually regulate their body temperatures fairly precisely during periods of activity by appropriate behavioural means, thus achieving homeothermy. |
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http://uts.cc.utexas.edu/~varanus/lacertids.html
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| | WSU Ask Dr. Universe The BIG Questions |
| | This means most of what ectotherms eat – like 80-90 percent -- is used for growth or making more ectotherms. | | | In spite of the heat, the chuckwalla is what we call "cold blooded," though Professor Verrell says the more accurate term is "ectotherm" ("ecto" means outside and "therm" means heat). | | | What the two terms describe is how the animals get the heat they need for their bodies to function properly. |
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http://www.wsu.edu/DrUniverse/hot.html
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| | Goldfish Metabolism Lab |
| | Terrestrial ectotherms frequently use behavioral mechanisms such as basking, hibernation, torpor, and nocturnal rhythms to thermoregulate. | | | Temperature is one of the most critical environmental factors influencing the ecology, behavior, and physiology of ectothermic animals. | | | Aquatic ectotherms frequently respond to environmental temperature changes through physiological responses and acclimation rather than behavioral responses. |
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http://bioweb.wku.edu/faculty/Crawford/ectothrm.htm
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| | SREL Herpers--Bill Hopkins |
| | Dr. Hopkins’ primary interest is the physiological ecology of ectotherms, and how anthropogenic disturbances alter the ability of ectotherms to interact appropriately with their environment. | | | Currently, Dr. Hopkins is an Assistant Research Scientist at the University of Georgia’s Savannah River Ecology Laboratory ( SREL). | | | Dr. Hopkins’ research program at SREL focuses on physiological ecology and wildlife ecotoxicology. |
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http://www.uga.edu/srelherp/staff/BHopkins.htm
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| | [No title] |
| | However, ectotherms are not literally "cold blooded." Under normal conditions, terrestrial ectotherms regulate body temperature by behavioral means, often at high levels and within narrow limits. | | | Amphibians and reptiles are wild animals, and we must adapt our laboratory techniques to their needs; we cannot expect them to adjust their biology to suit our convenience. | | | Publications for herpetological hobbyists often provide useful guides for care of ectothermal vertebrates (e.g., Mattison, 1982, 1988; Obst et al., 1988; de Vosjoli, 1989, 1990). |
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http://netvet.wustl.edu/species/amphib/pough.txt
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| | Electronic Naturalist: Outside Heat |
| | Thinking in terms of ectotherms and the fact that organisms are slower when in cold temperatures, can you think why a refrigerator is such an important way of keeping our food fresh? | | | Animals such as reptiles, moths, and the Bumblebee are able to regulate their internal body temperature somewhat through behavioral activities. | | | In recent years, poikilothermic has also met with disfavor and has been replaced by the term “ectothermic&;, to emphasize the importance of heat from an external source. |
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http://www.enaturalist.org/topic.htm?topic_ID=48
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| | Concepts and Definitions in Thermal Ecology |
| | Ectotherms that thermoregulate do so by behavioral means, i.e. | | | Some ectotherms, by choosing their thermal environment carefully, thermoregulate behaviorally and thus end up with fairly constant internal temperatures. | | | Ectotherms: organisms that obtain their heat from the external environment. |
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http://www.bio.utexas.edu/courses/ramakrishnanl/fall03/bio213mw/classnotes/thermal.html
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| | Biology 122 2nd Midterm Practice Exam Key |
| | Which of the following would probably be most able to resist disruption of homeostasis that could result if its body temperature were to change significantly? | | | a behavioral adaptation for absorbing heat in ectotherms; | | | Ensure that internal conditions vary at least as much as external conditions; |
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http://www.unm.edu/~toolson/122samp2_toolson_key.html
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| | Abstract: Metabolic Rates of an Endotherm and Ectotherms |
| | This could have been the cause of the great difference between the rat and the ectotherms that is not explained through the research done on differences in endothermic and ectothermic respiration. | | | A possible problem with the experiment was the difference in the equipment used to test the endotherm and ectotherms. | | | This study examines the difference in metabolic rates between an endotherm and ectotherms, and between different ectotherms. |
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http://spot.colorado.edu/~basey/jsills.html
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| | Temperature |
| | When these animals enter a resting state in response to heat or drought, the condition is called estivation. | | | Other examples when traditionally ectothermic animals generate body heat for specific activities | | | D. Ectotherm — majority of body heat derived from environment |
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http://www.park.edu/csanders/courses/bi344/temperature.htm
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| | Ectothermy |
| | An animal is an ectotherm if it keeps its body warm using heat mainly from outside its body - externally heated. | | | This means that their body temperature varies widely. | | | Ectotherms lie in the sun to warm their bodies up so that they can work properly. |
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http://palaeo.gly.bris.ac.uk/communication/Rothery/page1b
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| | Experimental Zoology |
| | Seasonal and diurnal fluctuations of temperature might have important effects on their locomotion if they affect the rate at which muscles contract and relax. | | | The change in level of the mercury in the pipette gives the volume of oxygen consumed in a measured time at the temperature and barometric pressure of the experiment. | | | Ectotherms and endotherms differ in the source of heat used in thermoregulation; external and internal (metabolic), respectively. |
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http://www.ahailey.f9.co.uk/expzool.htm
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| | DINOSAUR BRAINS AND BODY TEMPERATURE |
| | Ectotherms : obtain most of their heat from outside their body. | | | Some suggestion of problems with heat (e.g., sail may be used to pick up or shed heat rapidly from large body). | | | A variety of mechanisms are used to keep the body within the favorable temperature range. |
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http://www.es.ucsc.edu/~pkoch/lectures/lecture15.html
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| | research |
| | Vertebrate ectotherms have been a model system for demonstrating the effects of environmental change on individual- and population-level processes. | | | While osmoregulation and water conservation strategies (physiological and behavioral) are well studied, less is known about the effects water has on other certain physiological processes giving rise to life history variation. | | | Water is potentially a limiting resource for vertebrate ectotherm populations since water is involved in many of the physiological processes of individuals. |
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http://www.sas.upenn.edu/~msears/research.html
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| | ectotherms and endotherms |
| | This Australian water monitor is orientating it's body to get as much radiation from the sun as possible. | | | Ectotherms use behaviour to control their body temperature by altering the amount of heat they are gaining or losing by convection, conduction and radiation. |
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http://www.cix.co.uk/~argus/Dreambio/homeostasis/ectotherms%20and%20endotherms.htm
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| | Ectotherms - EvoWiki |
| | Ectotherms are those animals which derive body heat primarily from the environment, and not internal thermogenesis. | | | This page was last modified 22:23, 1 Nov 2004. |
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http://wiki.cotch.net/index.php/Ectotherms
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| | Summary of the Metabolism Debate |
| | N Many questions about endothermy and ectothermy in modern animals remain to be solved, such as: "How did endothermy evolve in mammals?", "When did it evolve in birds?", or "What alternatives are there to simple endothermic or ectothermic strategies?". | | | In fact, it seems more likely than anything that they did have some unknown sort of physiological system that worked well (they did dominate the realm of the terrestrial vertebrates for some 170 million years!). | | | Dinosaurs were mostly inertial homeotherms; they were ectothermic but maintained a constant body temperature by growing large. |
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http://www.ucmp.berkeley.edu/diapsids/summarythermy.html
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| | Biology - 422 - Ichthyology and Herpetology |
| | Sept 22-26—Physiological relationships of the ectotherms: osmoregulation (1). | | | Sept 15-19—Physiological relationships of the ectotherms: temperature, osmoregulation (2). | | | Oct 6-10—Reproductive biology of ectotherms: development, mating behavior (1). |
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http://www.hpcnet.org/peru/schoolartsandsciences/03f/biol422
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| | temp |
| | Metabolic activity is responsible for some body heat | | | But the use of very expensive endothermic physiological needs are avoided | | | This condescension may in part be due to the fact that we are endotherms |
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http://www.biol.andrews.edu/ecology/temp.html
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| | MSN Encarta - Dinosaur |
| | Ectotherms have a slower metabolism and regulate their body temperature by means of their behavior, taking advantage of external temperature variations by sunning themselves to stay warm and resting in the shade to cool down. | | | Endotherms regulate their body temperature internally by means of their metabolism, rather than by using the temperature of their surroundings. | | | By determining whether dinosaurs were warm- or cold-blooded, paleontologists could discover whether dinosaurs behaved more like modern mammals or more like modern reptiles. |
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http://encarta.msn.com/encyclopedia_761573347/Dinosaur.html
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| | Cold-blooded - Wikipedia, the free encyclopedia |
| | Some (usually smaller) animals have unregulated temperatures, but most have sophisticated physiological and behavioral techniques for obtaining their desired core body temeprature from the environment. | | | Ectotherms depend largely on external sources of heat, such as solar radiation. | | | Cold-blooded animals are often referred to as ectotherms. |
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http://en.wikipedia.org/wiki?title=Ectotherms&redirect=no
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| | Thermoregulation - Wikipedia, the free encyclopedia |
| | By changing its behavior, a lizard can keep the body temporature to some degree. | | | The heat of the body is generated by the chemical changes—those of oxidation—undergone not by any particular substance or in any one place, but by the tissues at large. | | | ectotherm, it is not able to control the body temperature through metabolic regulation. |
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http://en.wikipedia.org/wiki/Body_temperature
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| | Dinosaurs: Warm or Cold Blooded |
| | Most modern ectotherms have scaly skin as well. | | | Ectotherms lie in the sun to warm their bodies so that they can function properly. | | | Dinosaur bones have more in common with bird and mammal bone structure than reptile bone. |
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http://www.priweb.org/ed/ICTHOL/ICTHOL04papers/72.htm
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| | [No title] |
| | This is not to say that conformers may not have behavioral adaptations that allow them to exert some control over the parameter in question. | | | For instance, endothermic animals maintain a constant body temperature, while ectothermic animals exhibit wide variation in body temperature. | | | For instance, ectotherms tend to become sluggish at low temperatures, whereas endotherms are as active as always. |
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http://www.informationgenius.com/encyclopedia/h/ho/homeostasis.html
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| | NSW HSC ONLINE - Biology |
| | Ectotherms derive most of their body heat from their surroundings. | | | This site has useful information on a range of plants. | | | compare responses of named Australian ectothermic and endothermic organisms to changes in the ambient temperature and explain how these responses assist temperature regulation |
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http://hsc.csu.edu.au/biology/core/balance/9_2_1/921net.html
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| | [No title] |
| | There is no reason to assume that all dinosaurs had the same physiology, and there is even less of a reason to believe that their bodies worked like modern animals'. | | | Many scientists have come up with hypotheses that dinosaurs were endotherms, but this does not mean that their evidence is not without its problems. | | | Several researchers have been studying dinosaur bone structure, and, although the results are inconclusive at this time, the studies have shown that dinosaurs also had rapid growth rates on par with those of modern endothermic animals. |
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http://www.priweb.org/ed/ICTHOL/ICTHOLrp/37rp.htm
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| | Dinosaurs: Endotherms or Ectotherms? |
| | Problem: No real conclusive study on if endotherms out compete ectotherms. | | | Because of the fluctuating temperatures of ectotherms their enzymes have to cope with extreme conditions and therefore find it harder to develop. | | | Ectothermic is what is meant when an animal is called cold-blooded. |
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http://www.geo.brown.edu/geocourses/QE/fr/classtopics/Evolutio/TylerKorte/TKorte2.htm
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| | Space Science Group |
| | Control of body temperature comes from outside the body of the ectotherm. | | | The body temperature of ectotherms changes as the air, water, or soil around them changes. | | | We often see ectotherms "sunning." They are warming their bodies in the sun so that they can be active. |
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http://spacesciencegroup.nsula.edu/lessons/Default.asp?Theme=animals&pagename=ectotherms
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| | McCluskey, E. S. --- Temperature Regulation in Tetrapod Vertebrates |
| | Birds and mammals are capable of much higher sustained speeds than ectotherms and can have a much broader behavioral repertoire than ectotherms because of the greater range of possible speeds and activities. | | | Hence the capacity of endotherms for supporting work is many times that of ectotherms. | | | On the other hand, amphibians and reptiles (and many other animals), choose a warm environment at the time of activity, and this supplies the necessary heat; they are called "ectotherms,'' indicating that the heat source is external to the animal. |
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http://www.grisda.org/origins/09098.htm
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| | Ages |
| | Objective: Learn how some cold-blooded animals (ectotherms) regulate their body temperature and why it's important for them to be "warm." Students will: | | | Ectotherms: Animals that are the same temperature of their surroundings, often called cold-blooded animals. | | | Endotherms: Animals that maintain a constant body temperature, often called warm-blooded animals. |
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http://www.nbtc.cornell.edu/mainstreetscience/grab_and_go/reptbask.htm
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| | PRESENTER: Mulcahy, Daniel G |
| | Previous studies with ectotherms show equivalent trends, generally focus on fishes and invertebrates, and often measure growth of individuals reared in laboratory conditions. | | | Since terrestrial ectotherms regulate their body temperature by absorbing solar radiation through the body surface, those with higher surface area to volume relationships might thermoregulate more efficiently. | | | Called Bergmann's Rule, this trend reflects that organisms with a higher surface area to volume ratio lose heat quicker than organisms with proportionately smaller surface areas. |
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http://bioweb.usu.edu/dmulcahy/SgracAbstract97.html
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| | Singers With Hot Bodies: African Cicadas Reveal New Tricks |
| | This behaviour supports the contention that platypleurines try to avoid detection on the trunks and primary branches, and explains why they can be so hard to see, even if you are searching for them. | | | Ectotherms have been called cold-blooded in the past, but this is inaccurate. | | | Ectothermic animals use the heat of the sun to regulate their body temperature to a range where their enzymes function efficiently. |
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http://www.scienceinafrica.co.za/2003/february/cicadas.htm
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| | Dr. Steven J. Beaupre, M.S., Ph.D. |
| | Specifically, I have been interested in how environmental variation (temperature and food abundance) interacts with time budgets and physiological processes of ectotherms to affect their allocations to growth and reproduction. | | | temperature and food availability) interacts with time budgets and physiological processes of ectotherms to affect their bioenergetics. | | | RESEARCH: The goal of my research is to understand various mechanisms that influence the distribution and abundance of terrestrial vertebrate ectotherms. |
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http://comp.uark.edu/~sbeaupre/beaupre.html
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| | Grade Nine Unit Five Science Information |
| | Define what an ectotherm and an endotherm are. | | | Recognize the Dichotomous Key and be able to name animals according to its structure. | | | What two levels of the hierarchical system are included in naming organisms? |
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http://www.connect.ab.ca/~lburns/students_nineunit5review.html
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| | Evidence for Ectothermy? |
| | We shall objectively examine the hypotheses advocating ectothermy. | | | Lately some researchers have noticed that some dinosaurs do have structures in their nasal passages that do appear to be respiratory turbinates, but this has not yet been established, and followup reports have cast some doubts on those interpretations. | | | It may seem that little work has been done to support ectothermy in dinosaurs (until very recently), most likely because ectothermy in dinosaurs is assumed to be the default condition; the ancestors of dinosaurs (as reptiles) were ectothermic, so some might say that endothermy should be demonstrated, not ectothermy. |
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http://www.ucmp.berkeley.edu/diapsids/ectothermy.html
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| | the magic eraser: the bestest freshman class EVER |
| | Can anyone else think of behaviors ectotherms might engage in to thermoregulate? | | | Ectotherms are animals that cannot internally regulate thier temperature and must rely on thier environments to do so. | | | This is like when a lizzard suns itself on a rock. |
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http://themagiceraser.blogspot.com/2004/11/bestest-freshman-class-ever.html
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| | Newsday.com - Our Natural World |
| | Fish, reptiles and amphibians are generally unable to internally regulate their own body temperatures. | | | Freezing is not an option for ectotherms such as largemouth bass and bluegills, which flee encroaching ice by descending into deeper water. | | | While only a handful of Long Island mammals hibernate during winter, most of its cold-blooded creatures -- known scientifically as ectotherms -- would die if they didn't. |
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http://www.newsday.com/other/special/naturalworld/ny-nw-twcold1221,0,6496509.story?coll=ny-linews-toppromo
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