Effects of Territoriality on Population Density in the Japanese Serow (Capricornis Crispus)

Ochiai, Keiji; Susaki, Kayoko

doi:10.1644/1545-1542(2002)083<0964:eotopd>2.0.co;2

Cited by 33 publications

(21 citation statements)

References 18 publications

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“…Space use can vary between individuals within a species owing to differences in sex, age, habitat quality, population density, and absence of conspecific adults in the area (Wolff 1985, Pusenius and Viitala 1993a,b, Bond and Wolff 1999, Steinmann et al 2006a. In mammals, home range size and overlap could vary according to population density, density of females, and/or males, and both depend to a great extent on the sex and reproductive conditions of individuals (Fortier andTamarin 1998, Ochiai andSusaki 2002). Male rodents typically have larger home ranges than females; however, the relationship among female density, male home range size, and the degree of intra-sexual overlap remains unclear (Erlinge et al 1990, Nelson 1995a,b, Bond and Wolff 1999, Wolff et al 2002, Wolff 2003.…”

Section: Introductionmentioning

confidence: 99%

Do polygynous males of Akodon azarae (Rodentia: Sigmodontinae) vary their mating tactics at low availability of females?

et al. 2014

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We examined in Akodon azarae if at low availability of females (sex ratio biased toward males, 3:1), the mating tactics of males are determined by the number of receptive females to which they have access, or by the number of male competitors with which they interact. To test these hypotheses, we measured the home range size and overlap degree. At the beginning of the reproductive season, we studied spacing patterns using 57 and 30 home ranges established by reproductive males and females in three enclosure populations. We statistically compared our results with those previously obtained in enclosure populations with a sex ratio of 1:1. Male home range sizes were larger than those recorded in populations with a sex ratio of 1:1. The degree of male intra-sexual overlap increased about 3.5 times with respect to that observed under a sex ratio of 1:1. The increase in home range sizes and intra-sexual overlap degree of reproductive males reflects that A. azarae males may adjust their spacing strategy to increase their mating opportunities at low density of females. Our results suggest that at low breeding female availability, male mating tactics could be determined by the number of receptive females to which they have access.

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Section: Introductionmentioning

confidence: 99%

Do polygynous males of Akodon azarae (Rodentia: Sigmodontinae) vary their mating tactics at low availability of females?

et al. 2014

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“…The serow's population is usually well below the environmental carrying capacity estimated from forage availability in winter (Takatsuki et al 1996). Also, its social structure is solitary and intra-sexually territorial (Kishimoto and Kawamichi 1996, Ochiai and Susaki 2002, Kishimoto 2003. Individuals tend to remain in the same territory for a long time (Ochiai and Susaki 2002).…”

Section: Ecology Of the Japanese Serowmentioning

confidence: 99%

“…Also, its social structure is solitary and intra-sexually territorial (Kishimoto and Kawamichi 1996, Ochiai and Susaki 2002, Kishimoto 2003. Individuals tend to remain in the same territory for a long time (Ochiai and Susaki 2002). Unlike the co-occurring sika deer (Cervus nippon), the serow's social organization keeps its population density low and constant (Ochiai et al 1993, Ochiai 1996, Ochiai and Susaki 2002.…”

Section: Ecology Of the Japanese Serowmentioning

confidence: 99%

“…Individuals tend to remain in the same territory for a long time (Ochiai and Susaki 2002). Unlike the co-occurring sika deer (Cervus nippon), the serow's social organization keeps its population density low and constant (Ochiai et al 1993, Ochiai 1996, Ochiai and Susaki 2002. Thus, a most likely consequence of population growth is range expansion (Miura 1999).…”

Section: Ecology Of the Japanese Serowmentioning

confidence: 99%

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MODEL OF JAPANESE SEROW (CAPRICORNIS CRISPUS) ENERGETICS PREDICTS DISTRIBUTION ON HONSHU, JAPAN

Natori¹,

Porter

2007

Ecological Applications

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Understanding what determines a species' range is a central objective in ecology and evolutionary biology. It has important applications for predicting species distributions and how they might respond to environmental perturbations. This paper describes a mechanistic approach to predict past and present distribution of the Japanese serow (Capricornis crispus) on Honshu, Japan. We applied state-of-the-art microclimate and animal biophysical/behavioral models coupled with climate and vegetation data to estimate the distribution of potential range expansion under protection. We tested the model results against detailed empirical distribution data from the Ministry of the Environment for a five-prefecture area in central Honshu. We also applied the models to time-series land use/cover maps to investigate the historical transitions in habitat suitability during 1947-1999 in the Arai-Keinan region. This is the first time to our knowledge that mechanistic models have successfully predicted the landscape scale distribution of a mammal species in the absence of other animal species interactions, such as predators. In this case, animal energetics/behavior-plant interactions seem to be critical. Forest cover appears to be important in summer and winter for suitable serow habitats. The energetics model results indicate that the serow can overheat in some open environments in midday hours in summer. In winter, simulation results suggested that forest cover provides effective refuge to avoid increased metabolic demands of cold temperatures and strong winds. The model simulations suggested that land use/cover changes documented during 1947-1999 resulted in increased suitable serow habitat due to expanding forest cover from agricultural marginalization and ecological succession. The models provide a unique tool for estimating species' range expansion under protection or for selecting suitable reintroduction sites.

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“…It has long been understood that the behavior of individuals can impact the dynamics of their populations. The defense of territories limits the number of individuals who have access to resources and thus sets limits to population density (Ochiai & Susaki, , Japanese goat‐antelopes; Grant & Kramer, , juvenile salmonids). Cannibalism can increase mortality rates and thus reduce recruitment rates (see Wissinger, Whiteman, Denoël, Mumford, & Aubee, ).…”

Section: Introductionmentioning

confidence: 99%

Producing and scrounging can have stabilizing effects at multiple levels of organization

Vickery

2020

Ecology and Evolution

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This study shows, for the first time, that the evolution of a simple behavior, scrounging, at the individual level can have effects on populations, food chains, and community structure. In particular, the addition of scrounging in consumer populations can allow multiple consumers to coexist while exploiting a single prey. Also, scrounging in the top predator of a tritrophic food chain can stabilize interactions between the top predator, its prey, and its prey's prey. This occurs because the payoffs to scrounging for food in a population are negative frequency dependent, allowing scroungers to invade a population and to coexist with producers at a frequency which is density‐dependent. The presence of scroungers, who do not search for resources but simply use those found by others (producers) reduces the total amount of resource acquired by the group. As scrounging increases with group size, this leads to less resource acquired per individual as the group grows. Ultimately, this limits the size of the group, its impact on its prey, and its ability to outcompete other species. These effects can promote stability and thus increase species diversity. I will further suggest that prey may alter their spatial distribution such that scrounging will be profitable among their predators thus reducing predation rate on the prey.

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Effects of Territoriality on Population Density in the Japanese Serow (Capricornis Crispus)

Cited by 33 publications

References 18 publications

Do polygynous males of Akodon azarae (Rodentia: Sigmodontinae) vary their mating tactics at low availability of females?

Do polygynous males of Akodon azarae (Rodentia: Sigmodontinae) vary their mating tactics at low availability of females?

MODEL OF JAPANESE SEROW (CAPRICORNIS CRISPUS) ENERGETICS PREDICTS DISTRIBUTION ON HONSHU, JAPAN

Producing and scrounging can have stabilizing effects at multiple levels of organization

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