كيف تعرف عمر السمكة؟

10 أبريل 2013

لمعرفة عمر سمكة يتم بالنظر الى قشرها (انظر الصورة).

تظهر على القشرة حلقات النمو ( مثل حلقات نمو الأشجار) وتسمى circuli.

الجزء المنغرس في جلد السمكة من القشرة يحتوي على مجموعات من هذه circuli، كل واحدة من هذه المجموعات تقابل سنة من عمر السمكة.

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أخر المواضيع من قسم : السمك

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