Hayato Takada

Hayato Takada
Mount Fuji Research Institute

Doctor of Philosophy

About

25
Publications
1,262
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98
Citations
Introduction
I am interested in the followings: 1) Social evolution of ungulates, 2) Behavioral ecology of a solitary ungulate and a moutain ungulate, 3) Interspecific interaction among ungulates, 4) Suitable habitat of the Japanese serow for conservation, 5) Behavioral ecology of a solitary bat, such as tube-nosed bat.

Publications

Publications (25)
Article
Freezing behavior is frequently observed among forest-dwelling ungulates and is thought to function as a method of concealment from predators. However, because of the difficulty of observing such behaviors, detailed observations have not previously been conducted to provide evidence for this interpretation. Therefore, we have examined the response...
Article
One aim of animal behaviour research is to explain why animals live in groups. The grouping behaviour of solitary mammals is important for understanding the ecological factors promoting the evolution of sociality. We present field data of Japanese serow, a primitive solitary ungulate, in forest and alpine meadow habitats. We found no differences in...
Article
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Understanding the factors that drive the evolution of sociality is one of the central issues in behavioural ecology. In ungulates, open habitats, such as alpine meadows, are thought to have promoted the evolution of various gregarious societies from solitary territorial lifestyles. However, the transition from a solitary territorial lifestyle to a...
Article
Knowledge of food habits is essential for understanding the life history of a species; however, such information about the enigmatic Murina genus of bats is little known. In this study, we examined the food habits of Murina hilgendorfi and Murina ussuriensis over four years in Hayakawa, central Japan, using traditional morphological fecal analysis....
Article
Prey species generally trade better forage habitats for those with lower predation risk, but whether absence of predation risk can modulate the trade-off between forage and security remains unclear. In addition, direct interspecific competition may lead to inferior species avoiding dominant species. I examined the summer spatial distribution of the...
Article
Full-text available
Takada H, Aiba K (2022) Pelage color of the Japanese serow shows high variation among and within populations. Caprinae news, Newsletter of the IUCN/SSC Caprinae Specialist Group, 1/2021, 18-20
Article
Full-text available
In order to clarify the relationship between the summer habitat use of sika deer (Cervus nippon) and environmental conditions, a fecal pellet group survey was conducted at landscape scale (about 131 km2) in the northern slope of Mt. Fuji, central Japan. 60 transects with a width of 1 m and a length of 500 to 800 m are set (total distance: 33,323 m)...
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Full-text available
To explore effect of physical conditions, vegetation conditions, and distribution of terrestrial predators on the winter habitat use of Japanese hares (Lepus brachyurus), we conducted a snow footprint survey at landscape scale in the montane zone of Mt. Fuji, central Japan. For a forest road with a total length of 27.8 km in northern slope of Mt. F...
Article
Habitat selection has a significant influence on animals’ fitness, and has been well studied in various ungulates. A trade-off between the access to forage and to shelter often occurs for ungulates’ habitat selections, which vary temporally. However, habitat selections for primitive ungulates with solitary and sedentary, such as the Japanese serow...
Article
Determining the environmental factors that contribute to food resource partitioning or overlap is key to understanding the mechanisms of multispecies coexistence. Two ruminants, the Japanese serow (Capricornis crispus) and the sika deer (Cervus nippon), occur sympatrically in Japan, and interspecific interactions between them regarding food resourc...
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Full-text available
We extracted the presence record of the Japanese serow (Capricornis crispus) from the mountaineering diary published on YAMAP, a social network service (SNS) for mountaineers, and tried to draw their distribution. The extraction was conducted at the Mt. Fuji and the surrounding mountains (approximately 4,500 km2) over five years from January 2015 t...
Article
Like for many species, the timing of evening emergence of bats is an important behavioral aspect that affects their fitness and has been studied in various bat species. However, little is known about emergence timing of solitary bats that frequently switch day roosts, because they are difficult to observe. In this study, I examined the emergence ti...
Article
Habitat structure and population density have long been considered key factors in determining intraspecific variation in the group size of social ungulates. However, the effect of interaction between habitat structure and population density on group size is poorly understood, and whether the underlying causes of these relationships are biological a...
Article
Differential resource use allows for diverse species to specialize in ecological niches and thus coexist in a particular area. In the Japanese archipelago, increasing sika deer ( Cervus nippon , Temminck 1836) densities have excluded the Japanese serow ( Capricornis crispus , Temminck 1836), but in places where deer population densities are low, th...
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In order to examine the present status of the Japanese serow (Capricornis crispus) and the sika deer (Cervus nippon) in the alpine habitat at Mount Fuji, we conducted a direct observation for a total of 50 days from July 2017 to September 2019. The study area included subalpine forest and alpine volcanic desert. As a result, we found total of 51 in...
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Full-text available
In the northern slope of Mount Fuji, Yamanashi Prefecture, we found the day roosts using by solitary individual and maternity colony of the Japanese long-eared bat (Plecotus sacrimontis) at artificial buildings, and investigated the monthly change of its utilization. This is the first report of a maternity colony of this species in the northern slo...
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In high-density populations, the adults of the Japanese serow ( Capricornis crispus ) defend their home ranges against same-sex intruders, and a male’s territory typically overlaps with those of one to three females. We examined the spatial organization and mating behavior of the species in a low-density population by direct observation and radio-t...
Article
We investigated the food habits of the Japanese serow ( Capricornis crispus ) in alpine habitats using direct observations at Mount Asama, central Japan. We observed the feeding behavior of 13 identified adult serows throughout the year, from April 2016 to October 2017. The animals’ food habits were evaluated by the feeding probability among 2129 o...
Article
Observations of the flight response of ungulates are commonly used to test behavioral responses to predation risk. In gregarious ungulates with sexual body-size dimorphism such responses are likely to be stronger in situations where individuals have perceptions of less security as well as among more-sensitive individuals, such as female groups or f...
Article
Using fecal analyses, we examined the food habits of three large herbivorous mammals, the sika deer (Cervus nippon), the Japanese serow (Capricornis crispus), and the wild boar (Sus scrofa) on Mt. Asama, central Japan. Ten fecal samples were collected in all four seasons during 2012-2013, although boar feces were not available in summer because of...
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Full-text available
To reveal the roosting behavior of Hilgendorf’s tube-nosed bat Murina hilgendorfi, we studied their usage of a range of potential roost habitats, including abandoned mines, tunnels, dead broadleaf traps, dead summer cypress (Bassia scoparia) thickets, and outer building walls, in Hayakawa, Yamanashi Prefecture, Central Japan, between September 2013...

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Project (1)
Project
This research project using individual-based behavioral observation to reveal the adaptive significance of behavioral aspects (social organization, mating systems, communication, anti-predator behavior, resource utilization), life-history, population dynamics, and inter-specific relationships of the Japanese serow (Cpricornis crispus) and provide knowledge useful for the conservation of this species.