Persistence evaluation of strontium marking on otoliths in larvae common carp （Cyprinus carpio）

doi:10.14088/j.cnki.issn0439-8114.2021.08.023

Abstract

Abstract: In order to investigate the persistence of Sr markings on otoliths, the larvae common carp （Cyprinus carpio） were marked in this study, using a single concentration of high Sr solution for 2 d immersion. A recognizable Sr marking region could be detected in the otolith, after a long period of recovery, using electron probe X ray micro chemical analysis（EPMA） technique. The results of mapping analysis of Sr content and the fluctuation of Sr/Ca concentration ratios along line transect from the core （0 μm） to the edge in otoliths showed that even after 607 d （i.e., 20 months） of recovery culture, a ring of red Sr marking region was still kept in the otolith. The Sr mark of otolith was firstly confirmed existence for quite a long time at least 20 months after exogenous Sr marking, suggesting that this method exactly have a strong stability, reliability, durability and application potential in the large-scale marking for fish proliferating and releasing and evaluation of corresponding effect.

Key words: common carp （Cyprinus carpio）, strontium （Sr）, marking, otolith, persistence

CLC Number:

S932

QIU Chen, JIANG Tao, CHEN Xiu-bao, LIU Hong-bo, YANG Jian. Persistence evaluation of strontium marking on otoliths in larvae common carp （Cyprinus carpio）[J]. HUBEI AGRICULTURAL SCIENCES, 2021, 60(8): 114-117.

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