The evolution of thermal physiology in ectotherms

Angilletta, Michael J.; Niewiarowski, Peter H.; Navas, Carlos A.

doi:10.1016/s0306-4565(01)00094-8

Cited by 1,154 publications

(892 citation statements)

References 138 publications

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“…Low ATP formation capacity in the cold and high proton leakage in the warm contribute to insufficient oxygen supply, loss of aerobic scope and finally, transition to anaerobic metabolism (B). Maximum scope in ATP generation at the upper T p not only supports maximum capacity of organismic oxygen supply by circulatory and ventilatory muscles, but also an asymmetric performance curve of the whole organism (D, after Angilletta et al, 2002) with optimal performance (e.g. growth, exercise) again expected at the upper peius temperature T p .…”

Section: Trade-offs In Thermal Adaptation Setting Functional Limitsmentioning

confidence: 80%

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Oxygen limited thermal tolerance in fish?

Pörtner

Mark

Bock

2004

Respiratory Physiology & Neurobiology

109

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In various phyla of marine invertebrates limited capacities of both ventilatory and circulatory performance were found to set the borders of the thermal tolerance window with limitations in aerobic scope and onset of hypoxia as a first line of sensitivity to both cold and warm temperature extremes. The hypothesis of oxygen limited thermal tolerance has recently been investigated in fish using a combination of non-invasive nuclear magnetic resonance (NMR) methodology with invasive techniques. In contrast to observations in marine invertebrates arterial oxygen tensions in fish were independent of temperature, while venous oxygen tensions displayed a thermal optimum. As the fish heart relies on venous oxygen supply, limited cardio-circulatory capacity is concluded to set the first level of thermal intolerance in fish. Nonetheless, maximized ventilatory capacity is seen to support circulation in maintaining the width of thermal tolerance windows. The interdependent setting of low and high tolerance limits is interpreted to result from trade-offs between optimized tissue functional capacity and baseline oxygen demand and energy turnover co-determined by the adjustment of mitochondrial densities and functional properties to a species-specific temperature range. At temperature extremes, systemic hypoxia will elicit metabolic depression, thereby widening the thermal window transiently sustained especially in those species preadapted to hypoxic environments.

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Section: Trade-offs In Thermal Adaptation Setting Functional Limitsmentioning

confidence: 80%

“…Within the thermal tolerance window aerobic performance increases with temperature to a maximum and then decreases at higher temperatures yielding a species-specific asymmetric bell shaped curve, which shifts depending on thermal adaptation (Angilletta et al, 2002). Fig.…”

Section: Trade-offs In Thermal Adaptation Setting Functional Limitsmentioning

confidence: 97%

Oxygen limited thermal tolerance in fish?

Pörtner

Mark

Bock

2004

Respiratory Physiology & Neurobiology

109

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“…A significant correlation between temperature and lizard FID would suggest that escape responses are associated with variation in environmental conditions. That is, lizards may flee sooner when temperatures are lower to compensate for a potential decrement in locomotor performance capacity (e.g., Crowley 1985, Angilletta et al 2002. Because peak movement and foraging activity for A. festiva occurs during the latemorning hours (e.g., Hillman 1969, Vitt andZani 1996), and because these behaviors will likely alert predators of their presence (e.g., Martín and López 2001, Lattanzio pers.…”

Section: A C Bmentioning

confidence: 99%

Temporal and ontogenetic variation in the escape response of Ameiva festiva (Squamata, Teiidae)

Lattanzio

2014

Phyllomedusa

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Temporal and ontogenetic variation in the escape response of Ameiva festiva (Squamata, Teiidae). Several factors have been shown to affect lizard escape behavior (flight initiation distance or FID, the distance between predator and prey when the prey initiates escape). Patterns of daily activity, such as foraging or movement behavior, vary with respect to time of day, supporting that escape responses may vary temporally as well. However, there remains scant information regarding the effects of time of day on FID. During peak activity, FID may decrease due to increased cost of giving up resources (e.g., prey or potential mates). An alternative hypothesis is that FID may increase because lizard activity in general may serve to alert a predator in advance of its approach. A lizard in this scenario may be favored to flee sooner rather than later. Moreover, juvenile and adult lizards of multiple species may differ in behavioral, ecological, and morphological traits that could influence escape decisions. I tested the effects of time of day (in 30-min intervals) and age (juvenile or adult) on the FID of a tropical whiptail lizard, Ameiva festiva in Costa Rica. I found that A. festiva escape responses varied with time of day such that in general, their FID decreased throughout the day. In addition, I observed a peak in FID from mid to late-morning that matches published estimates of peak activity times for A. festiva. Overall, juvenile A. festiva initiated an escape response sooner than adults, which may be related to differences in perceived risk associated with differences in size and predator experience between the two age groups. I conclude that escape responses may be contingent on both the activity level of the animal at the time of approach and its age.Keywords: activity pattern, age, flight initiation distance, lizard, optimal escape theory, time of day. 18Phyllomedusa -13(1), August 2014 ResumoVariação temporal e ontogenética na resposta de fuga de Ameiva festiva (Squamata, Teiidae). Diversos fatores podem influenciar o comportamento de fuga dos lagartos (distância de início da fuga ou FID, a distância entre o predador e a presa quando esta inicia a fuga). Os padrões diários de atividade, como os comportamentos de forrageio ou de movimentação, variam em função da hora do dia, sustentando a ideia de que as respostas de fuga podem variar também temporalmente. Contudo, permenecem escassas as informações relacionadas aos efeitos da hora do dia sobre a FID. Durante o pico de atividade, a FID pode diminuir devido ao aumento do custo de desistir de recursos (e.g., presas ou parceiros potenciais). Uma hipótese alternative é a de que a FID pode aumentar porque a atividade do lagarto em geral pode servir para alertar um predador antes de sua aproximação. Esse cenário pode favorecer a fuga precoce de um lagarto, em vez de tardia. Além disso, lagartos juvenis e adultos de diversas espécies podem diferir em características de comportamento, ecológicas e morfológicas que poderiam influenciar as decisões de fuga. Test...

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“…Similarly, genotypes of Drosophila melanogaster from northern populations grew more rapidly during the larval period than did genotypes from southern populations (Robinson and Partridge 2001). Likewise, numerous cases of countergradient variation in the growth rates of juveniles have been documented (reviewed by Conover and Schultz 1995;Angilletta et al 2002).…”

Section: Geographic Variation In Growth and Developmentmentioning

confidence: 99%

“…Geographically widespread ectotherms encounter thermal gradients that generate variation in behavior, physiology, and life history (Dunham et al 1989;Porter 1989;Angilletta et al 2002). Daily and seasonal patterns of environmental temperature affect profiles of body temperatures in both thermoregulators and thermoconformers.…”

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confidence: 99%

CONVERGENT EVOLUTION OF EMBRYONIC GROWTH AND DEVELOPMENT IN THE EASTERN FENCE LIZARD (SCELOPORUS UNDULATUS)

Oufiero

Angilletta

2006

Evolution

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Abstract. Theory predicts that cold environments will select for strategies that enhance the growth of ectotherms, such as early emergence from nests and more efficient use of resources. We used a common garden experiment to detect parallel clines in rates of embryonic growth and development by eastern fence lizards (Sceloporus undulatus). Using realistic thermal conditions, we measured growth efficiencies and incubation periods of lizards from five populations representing two distinct clades. In both clades, embryos from cold environments (Indiana, New Jersey, and Virginia) grew more efficiently and hatched earlier than embryos from warm environments (Florida and South Carolina). Because eggs from cold environments were larger than eggs from warm environments, we experimentally miniaturized eggs from one population (Virginia) to determine whether rapid growth and development were caused by a greater maternal investment. Embryos in miniaturized eggs grew as efficiently and incubated for the same duration as embryos in unmanipulated eggs. Taken together, our results suggest countergradient variation has evolved at least twice in S. undulatus.

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The evolution of thermal physiology in ectotherms

Cited by 1,154 publications

References 138 publications

Oxygen limited thermal tolerance in fish?

Oxygen limited thermal tolerance in fish?

Temporal and ontogenetic variation in the escape response of Ameiva festiva (Squamata, Teiidae)

CONVERGENT EVOLUTION OF EMBRYONIC GROWTH AND DEVELOPMENT IN THE EASTERN FENCE LIZARD (SCELOPORUS UNDULATUS)

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