The external tags including nose label, fin clip, binding card and branding mark are provided with the advantages of simplicity, easiness and low cost, but their retentions are comparatively lower.
外标法主要包括鼻签、剪鳍、挂牌、烙印等，具有简便易行、成本较低等优点，但标记的保留率相对较低；
The external tags including nose label, fin clip, binding card and branding mark are provided with the advantages of simplicity, easiness and low cost, but their retentions are comparatively lower.
外标法主要包括鼻签、剪鳍、挂牌、烙印等，具有简便易行、成本较低等优点，但标记的保留率相对较低；
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