Length-weight and otolith size to standard length relationships in 12 species of Southern Ocean Myctophidae: a tool for predator diet studies

Saunders, Ryan A. ORCID: https://orcid.org/0000-0002-1157-7222; Lourenço, Silvia; Vieira, Rui P.; Collins, Martin A. ORCID: https://orcid.org/0000-0001-7132-8650; Xavier, Jose C. ORCID: https://orcid.org/0000-0002-9621-6660. 2021 Length-weight and otolith size to standard length relationships in 12 species of Southern Ocean Myctophidae: a tool for predator diet studies. Journal of Applied Ichthyology, 37 (1). 38-52. https://doi.org/10.1111/jai.14126

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Text (Open Access) This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. © 2020 The Authors. Journal of Applied Ichthyology published by Wiley-VCH GmbH jai.14126.pdf - Published Version Available under License Creative Commons Attribution 4.0. Download (531kB) | Preview

Abstract/Summary

Fish morphometric relationships are key tools for fisheries science and studies of food web dynamics and predator foraging behaviour, but parameterisations are limited for Southern Ocean myctophids (Family Myctophidae). New standard length (LS) to total mass (MT) relationships are therefore described for the 12 biomass‐dominant myctophid fish species living in the Scotia Sea, Southern Ocean, using the most comprehensive data collected in the region to date. New linear regressions for otolith size (length; OL and width; OW) and LS are also described. Significant (p < .01) LS–MT relationships were established for all species using simple non‐linear regression. Significant (p < .01) relationships between LS and both OL and OW were also determined for all species, with OW being the best predictor of LS in all but one species. Our study provides a comprehensive tool for reconstructing the myctophid component of marine predator diets that will improve future food web, predator behaviour and ecosystem studies in the Scotia Sea.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.1111/jai.14126
ISSN:	01758659
Additional Keywords:	Myctophidae; otoliths; length-mass relationship; otolith-body size relationship; Southern Ocean
Date made live:	02 Nov 2020 08:48 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/528726

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