对于大熊猫的数量统计,可以采用以下几种方法:
import pandas as pd
# 假设我们有一个CSV文件,记录了大熊猫的观察数据
data = pd.read_csv('panda_observation.csv')
# 直接计数法
total_count = data['panda_id'].nunique()
# 标志重捕法示例
marked_count = data[data['marked'] == True]['panda_id'].nunique()
recaptured_count = data[(data['marked'] == True) & (data['recaptured'] == True)]['panda_id'].nunique()
estimated_population = (marked_count * recaptured_count) / data['marked'].sum()
print(f"Total count: {total_count}")
print(f"Estimated population using mark-recapture method: {estimated_population}")
通过上述方法和工具,可以有效地对大熊猫的数量进行计数和重新计数,为保护工作提供科学依据。
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