Publication Date:
2021-05-19
Description:
The ichthyology studies at fish tagging was referred to more than 100 years ago. Tagging is utilized for the
estimation of stock amount, population frequency and project or calculating of survival and growth value. There
are many various methods for fish tagging are used for juvenile to adult fish. The current study was carried out at
Ghare-su research station during 2011-2013. 250 of carp fingerlings (Cyprinus carpio ) were tagged by bath
with tetracycline manner (pH=6, 500mg/l).
The fork length and weight of fish were 10-12 mm and 2-4 g, respectively.
Also, fish were fed twice a day. The second and third tagging stages were performed at November 2012 and July
2014, respectively. After otolith was extracted, it was washed water and dry at lab room air. The tagged rings or
loops (annuali) were observed by lab loupe with 10X and 40 X magnifications. The results showed that a narrow
band was formed after the first tagging of carp fingerlings, as it was seen at the end of otolith edge.
It was demonstrated that tetracycline was absorbed and the tagged ring or loop (annuli) was newly formed at
external or out of othlith edge. There was not observed any fish death, when carp fingerlings were tagged by
OTC bath manner. It said that the first OTC band will be seen, the first sign of the formed OTC band was
observed at external margin of otoilith after 6th month , of course , from 4th month, this sign was formed at the
most external of otoilth edge but with added the following region, it can be hardly distinguished. The formed
band in relative to second tagging was similar to the first band but there was no discrepancy or difference with
together.
Description:
Iranian Fisheries Science Research Institute
Description:
Published
Keywords:
Cyprinus carpio
;
Oxytetracycline
;
Tagging
;
Otolith
;
Growth
Repository Name:
AquaDocs
Type:
Report
,
Refereed
Format:
38pp.
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