A marking method of cutting uropods using malformed regeneration for kuruma prawn Marsupenaeus japonicus

Abstract

Malformed regeneration after cutting uropods was effective as a marking method for kuruma prawn, Marsupenaeus japonicus, 50 mm in body length (BL). After cutting uropods, the shape of uropods was changed by 12 cutting positions, and the malformed uropods were classified into four types for both lateral (Convex, Wide, Hollow and Narrow types) and mesial (Convex, Hollow, Narrow and Short types) rami. Group X2 reached the highest frequency of occurrence of 97%, 9 months after the uropod was cut, and it did not return to its normal shape. This malformed uropod was easy to find and was proven to be satisfactory over the long term.