It is recorded in the daily log of Zeelandia (Anping in Tainan County) that from 1657-l658, the average annual catch of grey mullet was 300,000 plus 30,000 catties of eggs, a very rich harvest.
熱遮蘭城日誌記載，一六五七到五八年間，烏魚的平均年獲量有卅萬尾，魚卵三萬斤以上，收穫十分豐盛。