scholarly journals A ‘slow pace of life’ in Australian old-endemic passerine birds is not accompanied by low basal metabolic rates

2016 ◽  
Vol 186 (4) ◽  
pp. 503-512 ◽  
Author(s):  
Claus Bech ◽  
Mark A. Chappell ◽  
Lee B. Astheimer ◽  
Gustavo A. Londoño ◽  
William A. Buttemer
Keyword(s):  
Metabolic Rates ◽  
Passerine Birds ◽  
Slow Pace ◽  
Pace Of Life

scholarly journals Tropical birds have a slow pace of life

2007 ◽  
Vol 104 (22) ◽  
pp. 9340-9345 ◽  
Author(s):  
P. Wiersma ◽  
A. Munoz-Garcia ◽  
A. Walker ◽  
J. B. Williams
Keyword(s):  
Tropical Birds ◽  
Slow Pace ◽  
Pace Of Life

scholarly journals Prolonged survival out of water is linked to a slow pace of life in a self-fertilizing amphibious fish

2019 ◽  
Vol 222 (24) ◽  
pp. jeb209270 ◽  
Author(s):  
Andy J. Turko ◽  
Justine E. Doherty ◽  
Irene Yin-Liao ◽  
Kelly Levesque ◽  
Perryn Kruth ◽  
...  
Keyword(s):  
Prolonged Survival ◽  
Slow Pace ◽  
Pace Of Life

Standard metabolic rates of three nectarivorous meliphagid passerine birds

1999 ◽  
Vol 47 (4) ◽  
pp. 385 ◽  
Author(s):  
S. D. Vitali ◽  
P. C. Withers ◽  
K. C. Richardson
Keyword(s):  
Metabolic Rate ◽  
Passerine Bird ◽  
Standard Metabolic Rate ◽  
Rate Data ◽  
Metabolic Rates ◽  
Passerine Birds ◽  
Allometric Relationship ◽  
Passerine Species ◽  
The Family ◽  
Per Se

Standard metabolic rate (VO2 STD) was determined for three species of passerine bird from the family Meliphagidae to investigate the possible effect of nectarivory on standard metabolic rate in this family. The three species that we investigated did not show a significant departure from allometric predictions of standard metabolic rate for passerine species. Disparities between standard metabolic rate for meliphagids in the present study and previous data appear to reflect methodological differences, and no general allometric relationship is apparent for meliphagids at present. In meliphagids, nectarivory per se is not an important correlate with standard metabolic rate. Data from additional meliphagid species, collected under standardised conditions, are required to confirm the generality of the findings of the present study, that nectarivorous meliphagids have a standard metabolic rate typical of passerine birds.

Metabolic cost of inflammatory response of ruby-throated hummingbirds (Archilochus colubris)

2020 ◽  
pp. 175815592096243
Author(s):  
L Gerardo Herrera M ◽  
Nadia Bayram ◽  
Kenneth C Welch
Keyword(s):  
Inflammatory Response ◽  
Metabolic Rate ◽  
Saline Solution ◽  
Resting Metabolic Rate ◽  
Metabolic Cost ◽  
Skin Inflammation ◽  
High Mass ◽  
Innate Immune Responses ◽  
Slow Pace ◽  
Pace Of Life

Animals with a slow pace of life and high mass-specific metabolic rates are expected to invest less in innate immune responses. We measured skin inflammation and the resting metabolic rate (RMR) of ruby-throated hummingbirds ( Archilochus colubris) after their immune system was challenged with phytohemagglutinin (PHA) and compared with the response of birds injected a saline solution. The PHA test measures the inflammatory process, a component of the innate response. Ruby-throated hummingbirds belong to a group that is under-represented in avian immunological studies characterized by a slow pace of life and fast metabolic rate. Hummingbirds developed an inflammatory response that lasted <28 h. PHA injection produced a significant increment of RMR (up to ~13%) with respect to RMR values after the injection of the saline solution indicating that immune response involved a metabolic cost for hummingbirds. This increment lies within the range of values previously reported for birds injected PHA (5%–29%).

The high-energy aerial insectivore lifestyle of swallows does not produce clear thermogenic side effects

The Auk ◽  
2021 ◽  
Author(s):  
Yufeng Zhang ◽  
Kang Nian Yap ◽  
Kyle T David ◽  
David L Swanson
Keyword(s):  
Side Effects ◽  
High Energy ◽  
Foraging Strategies ◽  
Activity Levels ◽  
Metabolic Rates ◽  
Aerobic Activity ◽  
Pace Of Life ◽  
Aerial Insectivore ◽  
Aerial Insectivores ◽  
Temperate Birds

AbstractEcological traits related to pace of life, such as foraging strategies and activity levels, influence daily energy expenditure (DEE) and can affect fitness. A fast pace of life tends to be supported by high-energy aerobic activity and is positively correlated with high DEE and basal and maximal metabolic rates in some endotherms. Given that maximal capacities for exercise and thermogenesis are both functions of aerobic muscle output and are often positively correlated with each other, high-energy aerobic lifestyles might be associated with high aerobic capacities, which would be expected to produce high thermogenic capacities as a side effect. We tested whether the high-energy aerial insectivore lifestyle in swallows is correlated with elevated basal and maximal thermogenic metabolic rates. We measured basal (BMR) and summit (Msum = maximum cold-induced metabolic rate) metabolic rates in 6 species of swallows (Hirundinidae) and combined these data with literature data for additional swallows (n = 10 for BMR; n = 8 for Msum) and non-aerial insectivore birds (n = 215 for BMR; n = 64 for Msum) to address the hypothesis that swallows have higher BMR and Msum than non-aerial insectivores. BMR in swallows was significantly higher than for non-aerial insectivore birds for phylogenetically adjusted analyses after correcting for body mass and region of origin (tropical vs. temperate). In contrast, Msum did not differ significantly between swallows and non-aerial insectivores. Thermogenic scope (Msum – BMR), however, was lower in tropical non-aerial insectivore birds compared with tropical swallows and temperate birds. This suggests that the aerial insectivore lifestyle elevates maintenance costs, but maximum thermogenic capacities are not clearly upregulated, despite tropical swallows having higher thermogenic scope than tropical non-aerial insectivores. These data suggest that the high-energy aerial insectivore lifestyle does not produce strong thermogenic side effects in swallows.

scholarly journals Life on the edge: common slow pace of life but contrasted trajectories of alpine rock ptarmigan populations at their southern margin

2020 ◽  
Vol 2020 (2) ◽  
Author(s):  
Coline Canonne ◽  
Claude Novoa ◽  
Bertrand Muffat-Joly ◽  
Jean Resseguier ◽  
Jean-François Desmet ◽  
...  
Keyword(s):  
Rock Ptarmigan ◽  
Slow Pace ◽  
Southern Margin ◽  
Pace Of Life

Slow pace of life of the Antarctic colossal squid

2010 ◽  
Vol 90 (7) ◽  
pp. 1375-1378 ◽  
Author(s):  
Rui Rosa ◽  
Brad A. Seibel
Keyword(s):  
High Speed ◽  
Cold Water ◽  
Morphological Characters ◽  
Routine Metabolic Rate ◽  
Predator Prey ◽  
Slow Pace ◽  
Large Size ◽  
Pace Of Life ◽  
Antarctic Waters ◽  
The Antarctic

The colossal squid (Mesonychoteuthis hamiltoni) is the world's largest invertebrate and its large size and some unique morphological characters have fuelled speculation that it is an aggressive top predator in the circum-Antarctic Southern Ocean. Here, we present estimates on the metabolic and energetic demands of this cold-water deep-sea giant. The estimated mass-specific routine metabolic rate for the colossal squid at 1.5°C was 0.036 µmol O2h−1g−1and the projected daily energy consumption (45.1 kcal day−1) was almost constant as a function of depth in the nearly isothermal Antarctic waters. Our findings also indicate the squid shows a slow pace of life linked with very low prey requirements (only 0.03 kg of prey per day). We argue that the colossal squid is not a voracious predator capable of high-speed predator–prey interactions. It is, rather, an ambush or sit-and-float predator that uses the hooks on its arms and tentacles to ensnare prey that unwittingly approach.

scholarly journals Small organ size contributes to the slow pace of life in tropical birds

2012 ◽  
Vol 215 (10) ◽  
pp. 1662-1669 ◽  
Author(s):  
P. Wiersma ◽  
B. Nowak ◽  
J. B. Williams
Keyword(s):  
Organ Size ◽  
Tropical Birds ◽  
Slow Pace ◽  
Pace Of Life
Sign in / Sign up

Export Citation Format

Share Document