Length measurement methods of Atlantic mackerel (Scomber scombrus) and Atlantic horse mackerel (Trachurus trachurus) – current practice, conversion keys and recommendations

International monitoring of Atlantic mackerel (Scomber scombrus) and Atlantic horse mackerel (Trachurus trachurus), two commercial and ecologically epipelagic fish species in the North Atlantic, is currently done inconsistently. Depending on the country and institute, the length of a specimen is mea...

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Bibliographic Details
Published in:Fisheries Research
Main Authors: Hansen, Flemming Thorbjørn, Burns, Finlay, Post, Søren Lorenzen, Thygesen, Uffe Høgsbro, Jansen, Teunis
Format: Article in Journal/Newspaper
Language:English
Published: 2018
Subjects:
greenlandic
North Atlantic
Online Access:https://orbit.dtu.dk/en/publications/16fb787b-c87e-4410-a63e-0c1ef91ee0d8
https://doi.org/10.1016/j.fishres.2018.04.002
Description
Summary:International monitoring of Atlantic mackerel (Scomber scombrus) and Atlantic horse mackerel (Trachurus trachurus), two commercial and ecologically epipelagic fish species in the North Atlantic, is currently done inconsistently. Depending on the country and institute, the length of a specimen is measured as either ‘Fork Length’, ‘Pinched Tail Length’ or ‘Total Length’. This inconsistency increases the uncertainty of results from data analyses that are based on international data compilations. Here we provide conversion tables between all three methods for both species, based on field sampling in Greenlandic and Scottish waters. For both species, we recommend the use of ‘Fork Length’ or ‘Pinched Tail Length’ rather than ‘Total Len

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