Competition between native ungulates: negative effects of sika deer (Cervus nippon) on foraging behavior, physiological stress, and population characteristics of Japanese serow (Capricornis crispus)

Journal of Zoology, Год журнала: 2025, Номер unknown

Опубликована: Апрель 24, 2025

Abstract In coevolved native ungulate assemblages, the mechanisms underlying competition remain unclear because, to date, little direct evidence of exists. high‐elevation areas in Japan, number Japanese serows ( Capricornis crispus ) has been decreasing as sika deer Cervus nippon increases. Here, we assessed effects on vegetation, vigilance and foraging behavior, physiological stress, relative abundance ratio young individuals throughout warm season across two study sites with different densities similar landscapes Mount Asama, Central Japan. The diversity palatable forage for (i.e., herbaceous forbs) were significantly lower abundant deer, suggesting that reduced vegetation quality serows. Serow rate was greater increased probability encountering or intraspecific aggression vigilance. bite their step availability forbs higher serow efficiency. Levels fecal cortisol metabolites decreased efficiency stress populations negatively affected population through both exploitative interference competition. This is a rare case show interspecific assemblages. Human alteration ecosystem processes, such elimination top predators human hunting pressure may determine changes ecological relationships between deer.

Язык: Английский

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Ecological drivers of population abundance of the Japanese serow in the absence of predation risk

European Journal of Wildlife Research, Год журнала: 2025, Номер 71(3)

Опубликована: Май 28, 2025

Abstract In ungulates, population abundance is mainly influenced by forage condition, predation pressure, competitor abundances, and human activities; however, information about the effect of escape terrain on still scarce. Some ungulate species often use areas with abundant despite absence predators, indicating that ghosts predators past continue to affect their spatial behavior, such ungulates may also be terrain. We examined Japanese serow ( Capricornis crispus ) in Mt. Fuji its surrounding mountains including both natural hunters, relation vegetation, (steep slopes), potential (sika deer Cervus nippon ), non-invasive activities. The (pellet group numbers) serows was higher coniferous forests than broad-leaved forests, dwarf bamboos where high fecal nitrogen content detected, suggesting availability bamboo trees as well quality abundance. Conversely, sika residences did not serows, activity have had a direct abundances. Moreover, terrain, Population low scarce terrains because fewer individuals settle environments minimal

Язык: Английский

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Observación visual de rumiantes mediante el método de categorías de bocados para estimar su consumo voluntario bajo pastoreo de agostaderos

Avances en Investigación Agropecuaria, Год журнала: 2024, Номер 28(1)

Опубликована: Март 1, 2024

Objetivo. Exponer el método de observación visual categorías bocados para estimar consumo rumiantes en agostaderos, su complejidad, fortalezas y limitantes. Materiales métodos. La revisión se focalizó los trabajos que mejoraron (validación, aumento la precisión estimación, repetibilidad fiabilidad) identificación las limitantes del método, presentan ejemplos uso etología, nutrición parasitología. Resultados. El consiste un conjunto técnicas integran elementos botánica, estadística, resultando una estimación confiable detallada cantidad calidad follaje ingerido por rumiantes. validación fue efectuada diversos autores estudios abarcan desde marcadores óxido cromo hasta animales fistulados. evolucionó a lo largo años incorporando mejoras como refinamiento según tamaño forma partes plantas consumidas (tablas bocados), protocolos habituación observar evitar influenciar conducta ingestión bajo estudio. Conclusión. Es costo, respetuoso bienestar animal, no interfiere con habitual, entre observadores tiene buena exactitud, es cuantitativa detallada. Sin embargo, implementación laboriosa, requiere conocimientos botánica entrenamiento bocados. Puede considerarse vigente, aplicable si dispone recurso humano capacitado.

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Feeding Habits of Japanese Serow in a Warm–Temperate, Low-Elevation, Evergreen Broad-Leaved Shrub-Dominated Forest

Mammal Study, Год журнала: 2024, Номер 49(4)

Опубликована: Июль 3, 2024

The distribution of the Japanese serow (Capricornis crispus) has recently expanded to low-elevation areas. However, there is little ecological information available for this species in such This study aimed elucidate feeding habits Ome Hills, central Japan, a area characterized by dominance evergreen broad-leaved trees shrub layer. Through analysis 115 fecal samples collected between 2019 and 2020, our findings revealed that consistently foraged on monocot leaves dicot stems throughout year. Furthermore, detailed examination signs indicated preference graminoids both coniferous plantations deciduous forests across all seasons.

Язык: Английский

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Ghosts of predators past remain in the spatial distribution and population density of the Japanese serow

Research Square (Research Square), Год журнала: 2024, Номер unknown

Опубликована: Ноя. 28, 2024

Some ungulate species select areas with abundant escape terrain despite the absence of predators, indicating that ghosts predators past continue to affect their spatial behavior. Population densities such ungulates may also be influenced by terrain; however, this has not been fully investigated. We examined distribution and population density Japanese serow (Capricornis crispus) at Mt. Fuji in relation abundance quality forage, vegetation, (steep slopes), other factors. Only affected was biased towards steeper slopes, suggesting past, i.e., wolves (Canis lupus) serow-hunting humans, still influence distribution. The serows higher coniferous forests than broad-leaved forests, dwarf bamboos where high fecal nitrogen content detected, forage availability bamboo trees as well density. Moreover, terrain, low because fewer individuals settle environments minimal terrain.

Язык: Английский

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