Basking and diurnal foraging in the dasyurid marsupial Pseudantechinus macdonnellensis

Pavey, Chris R.; Geiser, Fritz

doi:10.1071/zo08032

Cited by 26 publications

(16 citation statements)

References 29 publications

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“…We observed long bouts of torpor combined with short activity periods, similar to findings for closely related species (Pavey and Geiser 2008;Warnecke et al 2008;Körtner and Geiser 2009). Torpor entry occurred at 1850 and 1616 hours, the duration was 15.4 and 18.2 h, and the time of torpor arousal was 1014 and 1029 hours, respectively.…”

Section: Resultssupporting

confidence: 83%

“…Basking presents a risk-reward trade-off as it requires planigales to leave their sheltered resting sites in soil cracks and to place themselves in an exposed position on the surface during the day, which is likely to dramatically increase the risk of predation. Thus, it appears that this risk is outweighed by the energetic advantages achieved by basking (Pavey and Geiser 2008).…”

Section: Resultsmentioning

confidence: 99%

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Basking behaviour and torpor use in free-ranging Planigale gilesi

Warnecke

Geiser

2009

Aust. J. Zool.

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We investigated the importance of energy-conserving strategies for free-ranging Planigale gilesi in arid Australia. We monitored torpor use and basking behaviour using internal temperature-sensitive transmitters. Torpor was used every day; the maximum torpor bout duration was 18.2 h and the minimum body temperature was 10.5°C. Basking behaviour was observed during rewarming from torpor as well as during normothermia. The use of torpor and basking is likely to reduce the energy requirements of P. gilesi, thus helping it to survive in a harsh and unpredictable environment.

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Section: Resultssupporting

confidence: 83%

Section: Resultsmentioning

confidence: 99%

Basking behaviour and torpor use in free-ranging Planigale gilesi

Warnecke

Geiser

2009

Aust. J. Zool.

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“…Daily torpor is virtually ubiquitous within the carnivorous dasyurids, especially in those of small body size (Geiser, 1994). It has been recorded in Dasycercus (Geiser & Masters, 1994; Kortner, Pavey & Geiser, 2008; Pavey et al , 2009), Dasyuroides (Geiser & Baudinette, 1987), Dasyurus (Arnold, 1976), Pseudantechinus (Geiser & Pavey, 2007; Pavey & Geiser, 2008), Antechinus (Geiser, 1985, 1988; Wallis, 1976), Antechinomys (Geiser, 1986), Ningaui (Geiser & Baudinette, 1988), Sminthopsis (Cooper, McAllan & Geiser, 2005; Geiser, McAllan & Brigham, 2005 b ; Kortner & Geiser, 2009; Lovegrove et al , 1999 a ; Munn, Kern & McAllan, 2010; Warnecke & Geiser, 2010; Warnecke, Turner & Geiser, 2008), Dasykaluta (Kortner, Rojas & Geiser, 2010), and Planigale (Dawson & Wolfers, 1978; Geiser & Baudinette, 1988; Warnecke & Geiser, 2009). Several of these studies have recorded T b in free‐ranging dasyurids and basking behaviour during arousal from torpor has been shown to be quite common.…”

Section: Existing Support For and Potential Tests Of The Pae Modelmentioning

confidence: 99%

“…Several of these studies have recorded T b in free‐ranging dasyurids and basking behaviour during arousal from torpor has been shown to be quite common. Basking has been observed in the arid regions of Australia in Planigale (Warnecke & Geiser, 2009), Sminthopsis (Kortner & Geiser, 2009; Warnecke et al , 2008) and Pseudantechinus (Pavey & Geiser, 2008). In the laboratory, Sminthopsis crassicauda reduced the costs of arousal through exogenous passive heating (Lovegrove et al , 1999 a ) and actively moved to a radiant heat lamp with a torpid T b of 17.5°C saving 66% of rewarming costs (Warnecke & Geiser, 2010).…”

Section: Existing Support For and Potential Tests Of The Pae Modelmentioning

confidence: 99%

The evolution of endothermy in Cenozoic mammals: a plesiomorphic‐apomorphic continuum

2011

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The evolution of endothermy in birds and mammals was one of the most important events in the evolution of the vertebrates. Past tests of hypotheses on the evolution of endothermy in mammals have relied largely on analyses of the relationship between basal and maximum metabolic rate, and artificial selection experiments. I argue that components of existing hypotheses, as well as new hypotheses, can be tested using an alternative macrophysiological modeling approach by examining the development of endothermy during the Cenozoic. Recent mammals display a 10°C range in body temperature which is sufficiently large to identify the selective forces that have driven the development of endothermy from a plesiomorphic (ancestral) Cretaceous or Jurassic condition. A model is presented (the Plesiomorphic-Apomorphic Endothermy Model, PAE Model) which proposes that heterothermy, i.e. bouts of normothermy (constant body temperature) interspersed with adaptive heterothermy (e.g. daily torpor and/or hibernation), was the ancestral condition from which apomorphic (derived), rigid homeothermy evolved. All terrestrial mammal lineages are examined for existing data to test the model, as well as for missing data that could be used to test the model. With the exception of Scandentia and Dermoptera, about which little is known, all mammalian orders that include small-sized mammals (<500 g), have species which are heterothermic and display characteristics of endothermy which fall somewhere along a plesiomorphic-apomorphic continuum. Orders which do not have heterothermic representatives (Cetartiodactyla, Perissodactyla, Pholidota, and Lagomorpha) are comprised of medium- to large-sized mammals that have either lost the capacity for heterothermy, or in which heterothermy has yet to be measured. Mammalian heterothermy seems to be plesiomorphic and probably evolved once in the mammalian lineage. Several categories of endothermy are identified (protoendothermy, plesioendothermy, apoendothermy, basoendothermy, mesoendothermy, supraendothermy, and reversed mesoendothermy) to describe the evolution of endothermy during the Cenozoic. The PAE Model should facilitate the testing of hypotheses using a range of macrophysiological methods (e.g. the comparative method and the reconstruction of ancestral states).

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“…Elephant shrews Elephantulus myurus may similarly derive energetic benefits through basking during arousal (Mzilikazi et al , 2002) and rock hyraxes Procavia capensis through maintenance of T b (Brown & Downs, 2007). Thus, basking may provide an important source of heat in some mammals, especially for those inhabiting arid and food‐limited environments (Geiser, Goodship & Pavey, 2002; Geiser et al , 2004; Brown & Downs, 2005, 2007; Schwaibold & Pillay, 2006; Pavey & Geiser, 2008; Warnecke, Turner & Geiser, 2008).…”

Section: Introductionmentioning

confidence: 99%

Basking is affected by season and influences oxygen consumption in desert‐living striped mice

et al. 2010

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Small mammals that inhabit arid and temporally unproductive environments use several methods to conserve energy. Here, we investigate the energetic role of sun basking in striped mice Rhabdomys pumilio from the Succulent Karoo desert in South Africa. We observed mice in front of their nests for 140 h and recorded the time they spent basking during the non‐breeding (dry) and the breeding (wet) seasons. We measured temperature changes in model mice to provide an indication of the heat that can be absorbed from the sun. Finally, we measured the oxygen consumption (V̇O2) of mice at their basking sites in the field both in the sun and in the shade. This was accomplished using a portable respirometry system with a metabolism chamber, which could be placed in and out of the sun. Observations showed that mice basked more often during the non‐breeding than during the breeding season. During the former season, mice spent an average of 11.9 ± 1.1 min (se) in the morning and 5.5 ± 0.5 min in the afternoon per day basking. Within the metabolism chamber, V̇O2 decreased when the animal was in the sunshine compared with the shade. This effect occurred independent of the ambient temperature (Ta), indicating that a significant amount of radiant energy was absorbed from the sun. Basking may be an alternative to other energy‐acquisition behaviours, such as foraging, which might be particularly useful at times when food is scarce.

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Basking and diurnal foraging in the dasyurid marsupial Pseudantechinus macdonnellensis

Cited by 26 publications

References 29 publications

Basking behaviour and torpor use in free-ranging Planigale gilesi

Basking behaviour and torpor use in free-ranging Planigale gilesi

The evolution of endothermy in Cenozoic mammals: a plesiomorphic‐apomorphic continuum

Basking is affected by season and influences oxygen consumption in desert‐living striped mice

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