TY - JOUR
T1 - It’s elemental, my dear Watson
T2 - Validating seasonal patterns in otolith chemical chronologies
AU - Hüssy, Karin
AU - Krüger-Johnsen, Maria
AU - Thomsen, Tonny Bernt
AU - Heredia, Benjamin Dominguez
AU - Næraa, Tomas
AU - Limburg, Karin E.
AU - Heimbrand, Yvette
AU - McQueen, Kate
AU - Haase, Stefanie
AU - Krumme, Uwe
AU - Casini, Michele
AU - Mion, Monica
AU - Radtke, Krzysztof
N1 - Funding Information:
Thanks go to all technical staff involved in the collection and processing of samples used in this study. TABACOD tagging was carried out by staff from the National Marine Fisheries Research Institute, the Technical University of Denmark, the Swedish University of Agricultural Sciences, and the Th?unen Institute of Baltic Sea Fisheries. Genotyping of TABACOD recaptures was done by Jakob Hemmer-Hansen (DTU Aqua) and otolith shape-based stock assignment by Franziska Schade (Th?unen Institute of Baltic Sea Fisheries). Additional thanks are extended to Kristian Ege Nielsen for the chemical analyses of samples. This study was funded by BalticSea2020 (http://balticsea2020.org) through the project TABACOD. Financial support is also acknowledged from the Danish Ministry for Environment and Food and the European Maritime Fisheries Fond (grant No. 33113-B-17-092), the Swedish Research Council Formas (grant No. 2015-865), and the US National Science Foundation (grant No. OCE-1923965). The authors declare there are no competing interests.
Funding Information:
Thanks go to all technical staff involved in the collection and processing of samples used in this study. TABACOD tagging was carried out by staff from the National Marine Fisheries Research Institute, the Technical University of Denmark, the Swedish University of Agricultural Sciences, and the Thu€nen Institute of Baltic Sea Fisheries. Genotyping of TABACOD recaptures was done by Jakob Hemmer-Hansen (DTU Aqua) and otolith shape-based stock assignment by Franziska Schade (Thu€nen Institute of Baltic Sea Fisheries). Additional thanks are extended to Kristian Ege Nielsen for the chemical analyses of samples. This study was funded by BalticSea2020 (http://balticsea2020.org) through the project TABACOD. Financial support is also acknowledged from the Danish Ministry for Environment and Food and the European Maritime Fisheries Fond (grant No. 33113-B-17-092), the Swedish Research Council Formas (grant No. 2015-865), and the US National Science Foundation (grant No. OCE-1923965). The authors declare there are no competing interests.
Publisher Copyright:
© 2021, Canadian Science Publishing. All rights reserved.
PY - 2021/5
Y1 - 2021/5
N2 - Accurate age data are essential for reliable fish stock assessment. Yet
many stocks suffer from inconsistencies in age interpretation. A new
approach to obtain age makes use of the chemical composition of
otoliths. This study validates the periodicity of recurrent patterns in 25Mg, 31P, 34K, 55Mn, 63Cu, 64Zn, 66Zn, 85Rb, 88Sr, 138Ba, and 208Pb in Baltic cod (Gadus morhua)
otoliths from tag–recapture and known-age samples. Otolith P
concentrations showed the highest consistency in seasonality over the
years, with minima co-occurring with otolith winter zones in the
known-age otoliths and in late winter – early spring when water
temperatures are coldest in tagged cod . The timing of minima differs
between stocks, occurring around February in western Baltic cod and
1 month later in eastern Baltic cod; seasonal maxima are also
stock-specific, occurring in August and October, respectively. The
amplitude in P is larger in faster-growing western compared with eastern
Baltic cod. Seasonal patterns with minima in winter – late spring were
also evident in Mg and Mn, but less consistent over time and fish size
than P. Chronological patterns in P, and to a lesser extent Mg and Mn,
may have the potential to supplement traditional age estimation or to
guide the visual identification of translucent and opaque otolith
patterns used in traditional age estimation.
AB - Accurate age data are essential for reliable fish stock assessment. Yet
many stocks suffer from inconsistencies in age interpretation. A new
approach to obtain age makes use of the chemical composition of
otoliths. This study validates the periodicity of recurrent patterns in 25Mg, 31P, 34K, 55Mn, 63Cu, 64Zn, 66Zn, 85Rb, 88Sr, 138Ba, and 208Pb in Baltic cod (Gadus morhua)
otoliths from tag–recapture and known-age samples. Otolith P
concentrations showed the highest consistency in seasonality over the
years, with minima co-occurring with otolith winter zones in the
known-age otoliths and in late winter – early spring when water
temperatures are coldest in tagged cod . The timing of minima differs
between stocks, occurring around February in western Baltic cod and
1 month later in eastern Baltic cod; seasonal maxima are also
stock-specific, occurring in August and October, respectively. The
amplitude in P is larger in faster-growing western compared with eastern
Baltic cod. Seasonal patterns with minima in winter – late spring were
also evident in Mg and Mn, but less consistent over time and fish size
than P. Chronological patterns in P, and to a lesser extent Mg and Mn,
may have the potential to supplement traditional age estimation or to
guide the visual identification of translucent and opaque otolith
patterns used in traditional age estimation.
KW - Otolith
KW - LA-ICP-MS
KW - Cod
KW - Fish
UR - http://www.scopus.com/inward/record.url?scp=85105505202&partnerID=8YFLogxK
U2 - 10.1139/cjfas-2020-0388
DO - 10.1139/cjfas-2020-0388
M3 - Article
AN - SCOPUS:85105505202
SN - 0706-652X
VL - 78
SP - 551
EP - 566
JO - Canadian Journal of Fisheries and Aquatic Sciences
JF - Canadian Journal of Fisheries and Aquatic Sciences
IS - 5
ER -