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, Journal Year: 2025, Volume and Issue: unknown

Published: April 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.

Language: Английский

---

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

Avances en Investigación Agropecuaria, Journal Year: 2024, Volume and Issue: 28(1)

Published: March 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.

---

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

Mammal Study, Journal Year: 2024, Volume and Issue: 49(4)

Published: July 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.

Language: Английский

---

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

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 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.

Language: Английский

---