@article{fdi:010075530,
  title = {{M}arking otoliths of {B}altic cod ({G}adus morhua {L}innaeus, 1758) with tetracycline and strontium chloride},
  author = {{S}totera, {S}. and {D}egen-{S}myrek, {A}. {K}. and {K}rumme, {U}. and {S}tepputtis, {D}. and {B}auer, {R}obert and {L}immer, {B}. and {H}ammer, {C}.},
  editor = {},
  language = {{ENG}},
  abstract = {{I}dentified were suitable dosages of tetracycline hydrochloride ({TET}) in three single treatments and three combined treatments of {TET} with 2 mg/kg strontium chloride ({STR}) in wild western {B}altic cod ({G}adus morhua), in terms of (a) obtainable mark qualities (visibility of fluorescent bands), (b) growth assessment, and (c) induced mortality rates. {I}sotonic {N}a{C}l solution was injected in a control group (25 cod per treatment). {T}he results provide the basis for imperative age validation studies of {B}altic {S}ea cod. {C}od originating from pound nets near {F}ehmarn {I}sland were kept in swimming net cages at the harbor of {W}arnemunde for 1.5 months. {M}ean initial total length was 28(+/- 3) cm (salinity: 13, water temperature: 13 to 8 degrees {C}). {O}verall average growth of surviving cod was 0.8 mm/day. {I}n single {TET} treatments, lowest mortality rates and best mark quality were observed for {TET} concentrations of 100 compared to 50 and 25 mg/kg wet mass. {M}ortality rates of the 100 mg/kg treatment group were remarkably lower than in the control group emphasizing the antibiotic effect of {TET}. {B}y contrast, the double treatment in the {TET}-{STR} groups resulted in a binding interaction between both markers in the fish body causing either the antibiotic potency being inhibited or {TET} and {STR} forming a non-beneficial chelate (increased mortality), and decreased incorporation of {TET} in the otolith (reduced visibility of {TET} bands). {C}onsequently, {TET} (short-term marker) and {STR} (long-term marker) should not be injected together. {O}ur results demonstrate that the binding interactions between these substances known from homoiotherm animals also apply for poikilotherms such as fish.},
  keywords = {{ALLEMAGNE} ; {MER} {BALTIQUE} ; {FEHMARN} {ILE}},
  booktitle = {},
  journal = {{J}ournal of {A}pplied {I}chthyology},
  volume = {35},
  numero = {2},
  pages = {427--435},
  ISSN = {0175-8659},
  year = {2019},
  DOI = {10.1111/jai.13829},
  URL = {https://www.documentation.ird.fr/hor/fdi:010075530},
}