Using microclimate of arid landscape as a resource in goitered gazelle comfort behavior
Introduction
Deserts are characterized by high air temperatures, strong solar radiation, and a lack of water and cover (Southgate et al., 1996; Mader et al., 2010). Therefore, body thermoregulation and a deficit of water are the most important challenges for desert animals (Feldhamer et al., 1999). Overheating, for example, has a negative impact on fertilization and milk production (West, 2003; Souza et al., 2005). The inability to reduce the heat load leads to an increase in core body temperature and dehydration with the possibility of either or both conditions reaching lethal levels (Curtis, 1983). In cold conditions, warm-blooded animals strive to keep the stability of their body temperature by using systems of thermo-isolation and thermoregulation. In addition to physiological mechanisms, ungulates can use features of their local landscape, such as foothill gorges, deep dry river beds, high dunes and thickets of trees and shrubs for protection against strong cold winds (Zhevnerov et al., 1983; Blank, 1990).
Maintenance of body temperature within a narrow range is essential to proper metabolic function in mammals, and deviations outside a narrow range triggers thermoregulatory responses (Sessler, 1997). Indeed, investigations of many ungulate species demonstrated that their core body temperatures fluctuated within very narrow limits (less than ±2 °C) (Sargeant et al., 1994; Fuller et al., 2005). To facilitate this balance, animals have three kinds of mechanisms ̶ physiological, morphological and behavioral - to deal with maintaining body temperature within acceptable limits and minimizing water loss (Cain et al., 2006). However, production efficiency is better when animals do not need to use the physiological mechanisms (Souza et al., 2005); therefore, the key to ungulate thermoregulation, in the face of daily and seasonal changes of ambient temperature, appears to lie not in physiological mechanisms, but rather in their ability to employ behavioral thermoregulation (Fuller et al., 2005). First, free-living, terrestrial animals that select more favorable microclimate sites or a shelter in thermally heterogeneous habitats can change the timing of their activities, diet selection, social behaviors, body orientation, migration, and timing of reproduction (Bartholomew, 1987; Huey, 1991). Shade, as protection from extremes in weather, is required by animals, and they search for more comfortable sites, using features of the micro-relief in their environment, and looking for a fresh or humid place (Holcomb, 2017).
In contrast to physiological and morphological mechanisms, which have been considered for many species of wild and domestic ungulates (Hofmeyr, 1985; Fuller et al., 1999, 2005; Maloney et al., 2002), behavioral responses of wild ungulates to weather extremes have not been studied sufficiently (Cain et al., 2006; Cook et al., 2007), while using habitat characteristics for more comfortable sites by goitered gazelles (Gazella subgutturosa) has not been observed at all. The focus of this paper is the behavioral responses of goitered gazelles in natural conditions to hot sunny weather and cold windy weather and using the microclimate features of landscape, including shady and windy sites during the hot months and wind-protected, sunny places during the cold months.
During hot weather, shade from vegetation cover reduces ambient temperature and provides a reduced heat load (Demarchi and Bunnell, 1993). Therefore, there is a strong linear relationship between the use of shade by ungulates and both ambient temperature and incident solar radiation (Jarman and Jarman, 1973). Also the study of domestic horses has shown that the use of shade or shelter in hot weather does not correlate with sex (Heleski and Murtazashvili, 2010; Holcomb et al., 2014; Holcomb and Stull, 2016). So based on this observation, I thought that the same would be true for goitered gazelles and proposed my first hypothesis that shade-seeking behavior would not be correlated with sex and both males and females would use the shade equiprobably.
Young horses (foals and yearlings) were found to be more likely to seek shade in hot weather, because smaller body sized animals are more vulnerable to overheating, since an animal's heat load is proportional to its surface area rather than to its body weight, and smaller individuals have a relatively larger body surface compared to larger ones (Heleski and Murtazashvili, 2010). According to these observations I proposed my second hypothesis that young goitered gazelles also would be more likely to seek shade during hot months than adults.
During the cold months in Central Asia (winter and early-spring), ungulates in arid areas used deep depressions and dry river beds and foothills for protection against strong, cold winds (Sludskiy, 1963). In addition, during the cold daytime hours, wildebeest (Connochaetes taurinus) oriented their bodies in a “tail-to-wind” posture, then as the temperature rose, they changed their position to face into the wind (Berry et al., 1982; Maloney et al., 2002). Based on these observations, I suggested my third hypothesis that during cold seasons goitered gazelles would select windless slopes for their rest and they would use deep river beds and mountain gorges for protection against winds; they would also orient their bodies “tail-to-wind” to stay more comfortable during cold winds.
Domestic cows have been found to rest longer on a softer floor (Herlin, 1997; Chaplin et al., 2000), and the health of their legs improved through exposure to sand-covered floor stalls (Haley et al., 2001). I suggested that the same behavior would be observed in goitered gazelles and proposed my fourth hypothesis that goitered gazelles would choose the softer sand floors of the dry river beds for resting than the harder grounds surrounding the dry river beds.
Section snippets
Materials and methods
I observed grooming behavior of goitered gazelles in their natural habitat of the Altyn-Emel National Park in the Ili Hollow, south-eastern Kazakhstan (79° 00′N 43° 50′ E). My study spanned a 7-year period from June of 1981 to December of 1987, when the total population increased from 1500 up to 5000 gazelles. The study area is represented by a gravel desert, which is scarred with a thick net of dry river beds, karst craters and depressions, and intermingled with clusters of small hills and
Results
During warm months, goitered gazelles increased their preference for elevated areas, such as foothills and plateaus, while they showed their lowest preference for hill tops during cold months. The gazelles used elevated points for resting during June–September (with the maximum in June – Log-linear Model test, Z = - 4.884, P < 0.0001 June compared to March), less in April–May (Z = −3.181, P = 0.001 April compared March) and least in March and November (Fig. 2). In contrast, windless places they
Discussion
According to my first hypothesis, using relief features and the shade of shrubs/trees would be observed for both males and females equiprobably. My data supported this hypothesis in general, and all gazelles irrespective of their sex and age tried to find the most comfortable sites during hot seasons. However, adult males solved the problem of keeping their body heat balance differently from adult females and fawns. Adult males used mostly elevated points and relatively rarely utilized the
CRediT authorship contribution statement
D.A. Blank: Conceptualization, Methodology, Software, Data curation, Writing - review & editing, Visualization, Investigation, Supervision, Validation.
Declaration of competing interest
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Acknowledgments
I am very grateful to the Institute of Zoology, formerly the Academy of Sciences of Kazakhstan, which gave me the opportunity to study goitered gazelles in their natural environment over a 10 year period. I am grateful to Ms. Patricia Johnston for her useful suggestions and remarks and constant help in English editing of this manuscript.
References (53)
Antipredator tactics are largely maternally controlled in goitered gazelle, a hider ungulate
Behav. Process.
(2017)Escaping behavior in goitered gazelle
Behav. Process.
(2018)- et al.
Antipredator strategy of female goitered gazelles (Gazella subgutturosa Guld., 1780) with hiding fawn
Behav. Process.
(2015) - et al.
An evaluation of mattresses and mats in two dairy units
Appl. Anim. Behav. Sci.
(2000) - et al.
The effect of heat stress and lameness on time budgets of lactating dairy cows
J. Dairy Sci.
(2007) - et al.
Prevalence of lameness in high-producing Holstein cows housed in freestall barns in Minnesota
J. Dairy Sci.
(2006) - et al.
Effects of seasonal heat on the activity rhythm, habitat use, and space use of the beira antelope in southern Djibouti
J. Arid Environ.
(2013) - et al.
Assessing cow comfort: effects of two floor types and two tie stall designs on the behaviour of lactating dairy cows
Appl. Anim. Behav. Sci.
(2001) - et al.
Daytime shelter-seeking behavior in domestic horses
J. Vet. Behav.
(2010) - et al.
Energy advantage of orientation to solar radiation in three African ruminants
J. Therm. Biol.
(2011)
Preferences of dairy cows kept in unheated buildings for different kind of cubicle flooring
Appl. Anim. Behav. Sci.
Body surface area and thermoregulation in giraffes
J. Arid Environ.
Effects of sand and straw bedding on the lying behavior, cleanliness, and hoof and hock injuries of dairy cows
J. Dairy Sci.
Effect of softer flooring in tie stalls on resting behavior and leg injuries of lactating cows
J. Dairy Sci.
Precipitation and biomass changes in the Namib Desert dune ecosystem
J. Arid Environ.
Bedding on geotextile mattresses: how much is needed to improve cow comfort?
J. Dairy Sci.
Effects of heat stress on production in dairy cattle
J. Dairy Sci.
Observational study of behavior: sampling methods
Beyond Behav.
Interspecific comparison as a tool for ecological physiologists
Comparison of the diurnal activity pattern of blue wildebeest and red hartebeest
S. Afr. J. Wildl. Res.
Activity patterns in a population of free-ranging wildebeest Connochaetes taurinus at Etosha National Park
Z. Tierpsychol.
Peculiarities of social and reproductive behaviour of Gazella subgutturosa in the Iliisky Valley
Zool. Zh.
Persian gazelle
Grouping pattern of the goitered gazelle, Gazella subgutturosa (Cetartiodactyla: Bovidae) in Kazakhstan
Mammalia
Winter behavior of pronghorns in relation to habitat
J. Wildl. Manag.
Mechanisms of thermoregulation and water balance in desert ungulates
Wildl. Soc. Bull.
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