Demography and behavioral ecology of the Indian crested porcupine (Hystrix indica) in Punjab

Overview

This investigation examined population demographics, behavioral ecology, and reproductive characteristics of Hystrix indica across heterogeneous habitats in Punjab, Pakistan during 2019–2021. The research encompassed population density estimation, spatial-temporal distribution patterns, courtship mechanics, reproductive phenology, and parental care allocation to characterize species behavioral and ecological responses to environmental heterogeneity.

Methods and approach

Field surveys across multiple habitat types including irrigated forest plantations, sub-mountainous regions, agricultural, and desert ecosystems quantified population density and sighting frequencies. Temporal sampling tracked seasonal variation across four seasons. Behavioral observations documented courtship interactions, reproductive events, and parental care participation patterns. Statistical analysis included correlation assessment between behavioral components and variance testing across family groups.

Key Findings

Median population density reached 3 individuals/km² with habitat-dependent variation, elevated in irrigated plantations and sub-mountainous zones relative to agricultural and desert systems. Seasonal activity demonstrated pronounced peaks during summer months (4.98 sightings/km²) and minima in fall (2.04 sightings/km²). Reproductive timing showed year-round activity with distinct fertility peaks in February (predominantly single offspring) and July (predominantly multiple offspring per litter), presumably corresponding to seasonal resource fluctuations. Courtship behavior analysis documented significant positive association between mounting frequency and copulatory success, with mounting prevalence concentrated in February–April intervals. Parental care involvement demonstrated biparental participation as the dominant behavioral mode, followed by exclusive female, exclusive male, sub-adult/juvenile, and unidentified participant contributions, with significant between-family heterogeneity (P < 0.001).

Implications

The documented seasonal and spatial density variation across habitat types indicates phenotypic plasticity in response to resource distribution and environmental structure. Reproductive timing alignment with seasonal resource abundance suggests physiological coupling to environmental productivity cycles. The biparental care system with pronounced female participation and significant inter-family behavioral variance indicates flexible social organization potentially reflecting differential parental investment strategies or ecological constraints affecting familial composition and reproductive success.