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Age and growth of Antimora rostrata (Moridae, Gadiformes, Teleostei) from the Kerguelen and Crozet Islands in the southern Indian Ocean

Published online by Cambridge University Press:  13 April 2020

Nikolai B. Korostelev ,
Elena V. Vedishcheva  and
Alexei M. Orlov Open the ORCID record for Alexei M. Orlov [Opens in a new window]
Nikolai B. Korostelev
Affiliation:
A.N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Moscow 119071, Russia
Elena V. Vedishcheva
Affiliation:
Russian Federal Research Institute of Fisheries and Oceanography (VNIRO), Moscow 107140, Russia
Alexei M. Orlov*
Affiliation:
A.N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Moscow 119071, Russia Russian Federal Research Institute of Fisheries and Oceanography (VNIRO), Moscow 107140, Russia Dagestan State University, Makhachkala 367000, Russia Tomsk State University, Tomsk 634050, Russia
*
Author for correspondence: Alexei M. Orlov, Email: [email protected]
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Abstract

Age and growth of blue antimora Antimora rostrata were examined for the first time in the waters of Kerguelen and Crozet Islands (southern Indian Ocean, sub-Antarctic). The longline catches were represented by fish ranging from 39 to 72 cm in total length with weights between 400 and 3310 g, aged 16– 41 years. A minimum age of 16 years was observed in a fish 39 cm long, while a maximum age of 41 years was recorded for an individual of 70 cm in length and 3310 g in weight. The age classes with the greatest numbers were represented by fish aged 34 years (9%), 28 years (9%) and 29 years (8%), which together accounted for 26% of the total catch. The blue antimora in the southern Indian Ocean shows similar growth rates to those of individual fish from the Ross, Lazarev and Weddell Seas and southeastern Greenland, which may indicate the population unity of the species within the Antarctic and sub-Antarctic waters or similar habitat conditions in these areas.

Keywords

Blue antimora Antimora rostrataOtolithsAgeSizeGrowthSub-Antarctic
Type
Research Article
Information
Polar Record , Volume 55 , Issue 6 , November 2019 , pp. 452 - 459
Copyright
© The Author(s) 2020. Published by Cambridge University Press

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