Abstract：
The aim of the study was to assess the impact of the duration of the mating season and the time of day on the parameters of the vocalization pheasants (duration of vocalization, frequency of the sound wave, intervals between vocalizations). In the study, pheasant vocalization recorded in the morning (600-800) and in the afternoon (1600-1800) between April and June 2020 was analyzed. In total, the research material consisted of 258 separate vocalizations. After recognition of the individual songs of each bird, frequency-time indicators were collected from the samples to perform statistical analysis of the recorded sounds. The duration of the first syllable [s], the duration of the second syllable [s], the duration of the pause between the syllables [s], the intervals between successive vocalizations [min], and the peak frequency of the syllables I and II [Hz] were specified for each song. The duration of the syllables and the pauses between the syllables and vocalizations were determined through evaluation of spectrograms. The peak amplitude frequencies of the syllables were determined via time-frequency STFT analysis. Statistically significant differences in the distributions of the values of all variables between the analyzed months were demonstrated. The longest duration of total vocalization and the shortest time between vocalizations were recorded in May. Therefore, this month is characterized by the highest frequency and longest duration of vocalization, which is related to the peak of the reproductive period. The time of day was found to exert a significant effect on all variables except the duration of syllable II. The duration of vocalization was significantly shorter in the morning, which indicates that the cooks are more active at this time of day in the study area. The highest peak amplitude frequencies of both syllables were recorded in April, but they decreased in the subsequent months of observation. The time of day was also shown to have an impact on the peak amplitude frequencies, which had the highest values in the morning.
摘要：
研究的目的是评估交配季节的持续时间和一天中的时间对发声野鸡参数的影响（发声的持续时间，声波的频率，发声之间的间隔)。在研究中,分析了2020年4月至6月之间在上午（600-800）和下午（1600-1800）记录的野鸡发声。总的来说,研究材料包括258个单独的发声。识别每只鸟的单独歌曲后，从样本中收集频率-时间指标,对记录的声音进行统计分析.第一个音节的持续时间[s]，第二个音节的持续时间[s]，音节之间停顿的持续时间[s]，连续发声之间的间隔[min]，并且为每首歌曲指定音节I和II[Hz]的峰值频率。通过评估频谱图确定音节的持续时间以及音节和发声之间的停顿。通过时频STFT分析确定音节的峰值振幅频率。在分析的月份之间，所有变量的值的分布具有统计学上的显着差异。5月记录了总发声的最长持续时间和发声之间的最短时间。因此,这个月的特点是发声频率最高，持续时间最长，这与生育期的高峰有关。发现除了音节II的持续时间外，一天中的时间对所有变量都有显着影响。早晨发声的持续时间明显较短，这表明厨师在研究区域的这个时间更活跃。两个音节的最高峰值幅度频率都记录在4月份,但在随后几个月的观察中，它们有所下降。一天中的时间也被证明对峰值振幅频率有影响，早上的价值最高。
