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主要參考文獻: | Koli, L., 1990 | |||||||||||
資料參考: | ||||||||||||
國家: | Finland | |||||||||||
產卵地: | ||||||||||||
地點: | Finland | |||||||||||
季節: |
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
111 | 111 | 111 | 111 | |||||||||
性別比: | % 參考文獻: | |||||||||||
溫度: | 20 - 22 °C | |||||||||||
Gestation period: | month/s | |||||||||||
子代的長度: | cm | |||||||||||
批次產卵者 | ||||||||||||
每日的產卵頻度 |
- Mean: |
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Min Ref.: Max Ref.: Mean Ref.: |
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建議與指正: | Eggs mature in three periods: first, spawning occurs end of May; second, around midsummer (June); third, on the second week of July. Eggs are deposited on immerged vegetation or on gravel (Ref. 30578). | |||||||||||
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