Individual growth in Jack mackerel (Trachurus murphyi) of the Southeastern Pacific Ocean using sagitta otolith weight, daily rings, and annual rings

ABSTRACT We estimated the growth of Jack mackerel (Trachurus murphyi) using increments of daily growth, otolith weight and annual ring reading in sagittal otoliths. The daily micro-increments were used to fit ring density to the otolith radius (n = 4481) and then to estimate the age of the individua...

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Autores principales: Arancibia,Hugo, Cisterna,Lilian, Sepúlveda,Aquiles
Lenguaje:English
Publicado: Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción 2021
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Acceso en línea:http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382021000100095
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spelling oai:scielo:S0717-653820210001000952021-10-21Individual growth in Jack mackerel (Trachurus murphyi) of the Southeastern Pacific Ocean using sagitta otolith weight, daily rings, and annual ringsArancibia,HugoCisterna,LilianSepúlveda,Aquiles estimator of the age growth parameters otolith weight Trachurus t (years) ABSTRACT We estimated the growth of Jack mackerel (Trachurus murphyi) using increments of daily growth, otolith weight and annual ring reading in sagittal otoliths. The daily micro-increments were used to fit ring density to the otolith radius (n = 4481) and then to estimate the age of the individual in days. The parameters of the von Bertalannfy growth equation were: maximum theoretical fork length, FL∞ = 75 cm; individual growth coefficient, K = 0.16 year-1; theoretical age at which fish length is zero, t0= -0.19 years. The growth parameters of T. murphyi estimated using annual rings reading were: K = 0.10 year-1, FL∞ = 74.7 cm, t0 = -0.50 years. The growth parameters estimated using otolith weight were: K = 0.15 year-1, FL∞ = 75.0 cm, t0 = -0.48 years. The parameter K estimated with the daily micro-increments was similar to the K estimated using sagittal otolith weights. We constructed a size-age key for T. murphyi using otolith weight, OW (milligrams) as a variable was: OW= 0.0323*t-15.197 (r2= 0.68). We recommend using otolith weight to estimate age in T. murphyi due to this technique is statistically reliable, but also cheap and fast.info:eu-repo/semantics/openAccessFacultad de Ciencias Naturales y Oceanográficas, Universidad de ConcepciónGayana (Concepción) v.85 n.1 20212021-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382021000100095en10.4067/S0717-65382021000100095
institution Scielo Chile
collection Scielo Chile
language English
topic estimator of the age
growth parameters
otolith weight
Trachurus
t (years)
spellingShingle estimator of the age
growth parameters
otolith weight
Trachurus
t (years)
Arancibia,Hugo
Cisterna,Lilian
Sepúlveda,Aquiles
Individual growth in Jack mackerel (Trachurus murphyi) of the Southeastern Pacific Ocean using sagitta otolith weight, daily rings, and annual rings
description ABSTRACT We estimated the growth of Jack mackerel (Trachurus murphyi) using increments of daily growth, otolith weight and annual ring reading in sagittal otoliths. The daily micro-increments were used to fit ring density to the otolith radius (n = 4481) and then to estimate the age of the individual in days. The parameters of the von Bertalannfy growth equation were: maximum theoretical fork length, FL∞ = 75 cm; individual growth coefficient, K = 0.16 year-1; theoretical age at which fish length is zero, t0= -0.19 years. The growth parameters of T. murphyi estimated using annual rings reading were: K = 0.10 year-1, FL∞ = 74.7 cm, t0 = -0.50 years. The growth parameters estimated using otolith weight were: K = 0.15 year-1, FL∞ = 75.0 cm, t0 = -0.48 years. The parameter K estimated with the daily micro-increments was similar to the K estimated using sagittal otolith weights. We constructed a size-age key for T. murphyi using otolith weight, OW (milligrams) as a variable was: OW= 0.0323*t-15.197 (r2= 0.68). We recommend using otolith weight to estimate age in T. murphyi due to this technique is statistically reliable, but also cheap and fast.
author Arancibia,Hugo
Cisterna,Lilian
Sepúlveda,Aquiles
author_facet Arancibia,Hugo
Cisterna,Lilian
Sepúlveda,Aquiles
author_sort Arancibia,Hugo
title Individual growth in Jack mackerel (Trachurus murphyi) of the Southeastern Pacific Ocean using sagitta otolith weight, daily rings, and annual rings
title_short Individual growth in Jack mackerel (Trachurus murphyi) of the Southeastern Pacific Ocean using sagitta otolith weight, daily rings, and annual rings
title_full Individual growth in Jack mackerel (Trachurus murphyi) of the Southeastern Pacific Ocean using sagitta otolith weight, daily rings, and annual rings
title_fullStr Individual growth in Jack mackerel (Trachurus murphyi) of the Southeastern Pacific Ocean using sagitta otolith weight, daily rings, and annual rings
title_full_unstemmed Individual growth in Jack mackerel (Trachurus murphyi) of the Southeastern Pacific Ocean using sagitta otolith weight, daily rings, and annual rings
title_sort individual growth in jack mackerel (trachurus murphyi) of the southeastern pacific ocean using sagitta otolith weight, daily rings, and annual rings
publisher Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción
publishDate 2021
url http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382021000100095
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AT cisternalilian individualgrowthinjackmackereltrachurusmurphyiofthesoutheasternpacificoceanusingsagittaotolithweightdailyringsandannualrings
AT sepulvedaaquiles individualgrowthinjackmackereltrachurusmurphyiofthesoutheasternpacificoceanusingsagittaotolithweightdailyringsandannualrings
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