The influence of season, temperature, and absorptive state on sage grouse metabolism

1994 ◽  
Vol 72 (5) ◽  
pp. 898-903 ◽  
Author(s):  
Mark H. Sherfy ◽  
Peter J. Pekins
Keyword(s):  
Metabolic Rate ◽  
Seasonal Change ◽  
Breeding Season ◽  
Centrocercus Urophasianus ◽  
Standard Metabolic Rate ◽  
Behavioral Thermoregulation ◽  
Sage Grouse ◽  
Critical Temperatures ◽  
Males And Females ◽  
Endogenous Reserves

We used indirect respiration calorimetry to measure the metabolism of six adult sage grouse (Centrocercus urophasianus) during winter, spring, and summer. During winter the metabolic rate of fed birds was higher (P < 0.05) than that of fasted birds. The standard metabolic rate (SMR) of females (0.692 mL O2∙g−1∙h−1) was higher than of males (0.583 mL O2∙g−1∙h−1) in winter; in both sexes SMR was higher in winter than in summer. Females' SMR was lower (P = 0.0001) in spring than in winter. Lower critical temperatures of both males and females were substantially lower in winter (−0.6 °C, −4.8 °C) than in summer (14.9 °C, 14.8 °C). Although seasonally elevated, the SMR of sage grouse in winter is low in comparison with that of other galliforms with northern distributions. Thermoregulation during a winter night at −10 °C would result in minimal (<5%) expenditure of endogenous reserves by either sex. Thermoregulation and SMR in winter are more energetically costly to female sage grouse than to males, and may necessitate increased behavioral thermoregulation by females. Seasonal change in SMR differs between the sexes, and is probably influenced by the energetic demands of the breeding season.

Influence of wind speed on sage grouse metabolism

1995 ◽  
Vol 73 (4) ◽  
pp. 749-754 ◽  
Author(s):  
Mark H. Sherfy ◽  
Peter J. Pekins
Keyword(s):  
Critical Temperature ◽  
Wind Speed ◽  
Metabolic Rate ◽  
Centrocercus Urophasianus ◽  
Standard Metabolic Rate ◽  
Sage Grouse ◽  
Ambient Temperatures ◽  
Wind Speeds ◽  
Lower Critical Temperature ◽  
Wind Measurements

We measured the effect of wind speed on the metabolic rate of six adult sage grouse (Centrocercus urophasianus) with indirect respiration calorimetry at ambient temperatures above, near, and below the lower critical temperature. There was a significant effect (P < 0.05) of temperature on metabolic rate at all wind speeds, and a significant effect (P < 0.05) of wind speed on metabolic rate for temperatures ≤ 0 °C. Wind speed had a more pronounced effect on metabolism at temperatures below the lower critical temperature for sage grouse. Metabolic rates measured at wind speeds of ≥ 1.5 m/s were significantly higher than those measured at wind speeds < 1.5 m/s. Multiple regression analysis of wind speed (u; m/s) and temperature (Ta; °C) on metabolism (MR; mL O2∙g−1∙h−1) yielded the equation MR = 0.0837 (u) − 0.0248 (Ta) + 0.5444. The predicted cost of thermoregulation at conditions of −5 °C and u = 1.5 m/s was about 1.5× standard metabolic rate; half the increase was due to wind. Measurements of wind speed in sagebrush (Artemisia spp.) stands indicate that such habitat effectively reduces wind speed to < 1.5 m/s. Microhabitat value should be recognized in the management of sagebrush stands.

Sexual and subspecific variation in the numbers of rectrices of blue grouse

1991 ◽  
Vol 69 (1) ◽  
pp. 134-140 ◽  
Author(s):  
Fred C. Zwickel ◽  
Mark A. Degner ◽  
Donald T. McKinnon ◽  
David A. Boag
Keyword(s):  
Distinct Group ◽  
Centrocercus Urophasianus ◽  
Small Sample ◽  
Hybrid Population ◽  
Sage Grouse ◽  
Modal Number ◽  
The North ◽  
Dendragapus Obscurus ◽  
Coastal Birds ◽  
Males And Females

We examined numbers of rectrices of all subspecies of blue grouse (Dendragapus obscurus), determined from our own studies and reported in the literature. Approximately 8% of all birds had an uneven number of rectrices, with no difference between males and females. More birds from a presumed subspecific "hybrid" population had uneven numbers of rectrices than those from "nonhybrid" samples. Of North American tetraonines, sage grouse (Centrocercus urophasianus) and blue grouse appear most variable in this character. Within subspecies, males and females had the same modal numbers of rectrices. The sexes differed, however, in the overall distribution of numbers of rectrices; most birds with submodal numbers were females and most birds with supermodal numbers, males. Males and females in one hybrid population differed in modal numbers of rectrices: males 20, and females 18. Eighty per cent of all coastal blue grouse had 18 rectrices, with no differences among subspecies. In contrast, all interior subspecies differed from each other. The two northern interior subspecies, D. o. pallidus and D. o. richardsonii, had modes of 20 rectrices, with that for pallidus weaker than that for richardsonii (70 and 81% modal, respectively). Dendragapus obscurus obscurus had a mode of 18 rectrices, not different from that for coastal birds. A small sample of D. o. oreinus was equally divided between birds with 18 and 20 rectrices, suggesting relationships with D. o. pallidus to the north and D. o. obscurus to the east. Northern interior blue grouse emerge as a distinct group with respect to modal number of rectrices, which parallels the pattern for the presence or absence of tail bands. Based on these two characteristics, coastal blue grouse appear more closely related to southern interior than to northern interior subspecies. The blue grouse is the only tetraonine with clear evidence of subspecific variation in numbers of rectrices.

Indirect calorimetry measurements of behavioral thermoregulation in a semiaquatic social rodent, Myocastor coypus

1992 ◽  
Vol 70 (5) ◽  
pp. 907-911 ◽  
Author(s):  
Christine Moinard ◽  
C. Patrick Doncaster ◽  
Hervé Barré
Keyword(s):  
Metabolic Rate ◽  
Indirect Calorimetry ◽  
Cold Water ◽  
Resting Metabolic Rate ◽  
Behavioral Thermoregulation ◽  
Myocastor Coypus ◽  
Thermoneutral Zone ◽  
Different Temperatures ◽  
Males And Females

The role of behavior is quantified in the maintenance of thermic homeostasis by a semiaquatic rodent, the coypu (Myocastor coypus). Indirect calorimetry measurements showed that huddling behavior is responsible for a 20% drop in resting metabolic rate at temperatures below the thermoneutral zone. Different associations of males and females in groups of two and three resulted in significant differences in decreases of resting metabolic rate. In a cold environment (Ta = −5 °C), males used a ball-like posture significantly more often than females. When presented with a choice of substrates (air versus water) at different temperatures, females tended to reduce their time spent in cold water but males did not, despite a greater loss of energy in water compared with air. These results appear to express a conflict between social and thermoregulatory behaviors, contributing to male-biased mortality in winter.

Observation on the breeding biology of Polypedates teraiensis (Dubois, 1987) (Amphibia: Rhacophoridae)

2017 ◽  
Vol 17 (1) ◽  
pp. 25-32
Author(s):  
Jacinta Lalchhanhimi ◽  
Lalremsanga H.T.
Keyword(s):  
Sexual Dimorphism ◽  
Breeding Season ◽  
Sound Production ◽  
Reproductive Function ◽  
Breeding Biology ◽  
Tree Frog ◽  
University Campus ◽  
Morphometric Measurements ◽  
Advertisement Calls ◽  
Males And Females

The breeding biology of tree frog, Polypedates teraiensis was studied during the breeding season at Mizoram University Campus. It was found that sound production by male during the breeding season was primarily a reproductive function and advertisement calls attract females to the breeding areas and announce other males that a given territory is occupied. The aim of this study was to provide the detailed information on the breeding behaviour and the advertisement calls of Polypedates teraiensis. The morphometric measurements of the amplecting pairs (males and females) for sexual dimorphism along with clutch sizes were also studied.

Greater Sage-Grouse (Centrocercus urophasianus)

1999 ◽  
Author(s):  
Michael A. Schroeder ◽  
Jessica R. Young ◽  
Clait E. Braun
Keyword(s):  
Centrocercus Urophasianus ◽  
Sage Grouse

scholarly journals Field Methods for Translocating Female Greater Sage‐Grouse ( Centrocercus urophasianus ) with their Broods

2021 ◽  
Author(s):  
Mary B. Meyerpeter ◽  
Kade D. Lazenby ◽  
Peter S. Coates ◽  
Mark A. Ricca ◽  
Steven R. Mathews ◽  
...  
Keyword(s):  
Centrocercus Urophasianus ◽  
Sage Grouse ◽  
Field Methods

Field-Testing a Standard Metabolic Rate Estimation Technique for Eastern Red-Backed Salamanders

2016 ◽  
Vol 50 (1) ◽  
pp. 138-144
Author(s):  
Patrick J Ruhl ◽  
Robert N Chapman ◽  
John B. Dunning
Keyword(s):  
Metabolic Rate ◽  
Field Testing ◽  
Standard Metabolic Rate ◽  
Estimation Technique ◽  
Rate Estimation

Effects of power lines on habitat use and demography of greater sage-grouse (Centrocercus urophasianus)

2018 ◽  
Vol 200 (1) ◽  
pp. 1-41 ◽  
Author(s):  
Daniel Gibson ◽  
Erik J. Blomberg ◽  
Michael T. Atamian ◽  
Shawn P. Espinosa ◽  
James S. Sedinger
Keyword(s):  
Habitat Use ◽  
Centrocercus Urophasianus ◽  
Power Lines ◽  
Sage Grouse

2. Mating systems, or who goes with whom, and for how long

2018 ◽  
pp. 16-33
Author(s):  
Leigh W. Simmons
Keyword(s):  
Sexual Selection ◽  
Mating System ◽  
Social Relationships ◽  
Breeding Season ◽  
Mating Systems ◽  
Practical Applications ◽  
Multiple Partners ◽  
Monogamous Species ◽  
Genetic Techniques ◽  
Males And Females

‘Mating systems, or who goes with whom, and for how long’ examines the variation in how males and females associate during the breeding season, ranging from brief couplings with multiple partners to lifelong monogamy. It also shows how the discovery that females mate with many partners, even in supposedly monogamous species such as songbirds, was made possible by modern genetic techniques. Variation in mating systems holds considerable implications for the operation of sexual selection. The way that animal mating systems have been explained historically is outlined before considering how a more contemporary understanding of genetic and social relationships has reshaped our thinking and how understanding a species’ mating system can have practical applications.

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