Dear Jørn,
apart from Andrew Jones thesis there are the following publications providing length regression formulae for Gadidae bones.
# Rojo, Alfonso (1986): Live Length and Weight of Cod (Gadus morhua) estimated from various skeletal Elements. – North American Archaeologist 7(4), 329-351
>>> Formulae for Praemaxillare, Maxillare, Dentale, Articulare, Postcleithrale, Operculare, Qudratum, Hyomandibulare, Praeoperculare, Cleithrum
# Scott, J. S. (1977): Back-Calculated Fish Lengths and Hg and Zn Levels from Recent and 100-Yr-Old Cleithrum Bones from Atlantic Cod (Gadus morhua). – Journal of the Fisheries Research Board of Canada 34(1), 147-150
# Kenchington, Trevor J. & Kenchington, E. L. R. (1993): An eighteenth century commercial length-frequency sample of Atlantic cod, Gadus morhua, based on archaeological data. – Fisheries Research 18, 335-347, Amsterdam
>>> Formulae for Cleithrum (applying Rojo 1986 and Scott 1977)
Dirk Heinrich provides graphs and formulae for vertebrae and cleithra (Heinrich 1985, 42-43, Tab. 7; 1987, 95-108, 214-215, Abb. 36-37, 39, Tab. 26; 1994, 232)
# Heinrich, Dirk (1985): Die Fischreste aus der frühgeschichtlichen Marschensiedlung beim Elisenhof in Eiderstedt, Schriften aus der Archäologisch-Zoologischen Arbeitsgruppe Schleswig-Kiel 9, Kiel
# Heinrich, Dirk (1987): Untersuchungen an mittelalterlichen Fischresten aus Schleswig – Ausgrabung Schild 1971-1975, Ausgrabungen in Schleswig, Berichte und Studien 6, Neumünster
# Heinrich, Dirk (1994): Die Fischreste aus der frühgeschichtlichen Wurt Elisenhof, Elisenhof 6, Frankfurt am Main
I am not sure if the article by Lernau & Ben-Horin(2016) is applicable in your case as well (cannot look it up at present):
# Lernau, Omri & Ben-Horin, Moshe (2016): Estimations of sizes of fish from subfossil bones with a logarithmic regression model. – Environmental Archaeology 21(2), 133-136
Best
Christian
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> Am 31.01.2020 um 16:04 schrieb Abone <[log in to unmask]>:
>
> Hello Zooarchers,
>
> I’m analyzing fish bones from a Bronze Age site in the northwestern part of the Netherlands. Most of them are from large cod, with estimated lengths (based on my reference specimen) around or (far) more than 1 m.
> Are there any methods to calculate the total length on the basis of measurements of bones other than the first vertebrae? If you have any relevant information or publications on this I’d be happy to hear from you J.
>
> Very best,
> Jørn Zeiler
>
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